drilling calculation

90
1. oldal U N I T C O N V E R S I O N S Written by Gabor Nemeth Conversion from metric to Conversion from English to Calculations English unit metric unit Metr.symbol Multiply by Eng.name Eng.symbol Multiply by Metr.symbol Metr.quantity Eng.result Eng.quantity mm 0.03937 inches in 25.4 mm 1 0.03937 1 m 3.28084 feet ft 0.3048 m 1 3.28084 1 m 1.09361 yards yd 0.9144 m 1 1.09361 1 km 0.621373 miles(land) mile(st) 1.60934 km 1 0.621373 1 l 0.264178 gallons(US) gal(US) 3.78533 l 1 0.264178 1 l 0.219976 gallons(UK) gal(UK) 4.54596 l 1 0.219976 1 l 0.0353147 cubic feet cu.ft 28.3168 l 1 0.0353147 1 6.28994 barrel bbl 0.158984 1 6.28994 1 N 0.224809 pounds lbs 4.44822 N 1 0.224809 1 kg 2.20462 pounds lbs 0.453592 kg 1 2.20462 1 kPa 0.145038 psi psi 6.894745 kPa 1 0.145038 1 Mpa 145.038 psi psi 0.0068947 Mpa 1 145.038 1 bar 14.5038 psi psi 0.0689475 bar 1 14.5038 1 N.m 0.737561 foot pounds ft.lb 1.35582 N.m 1 0.737561 1 kg.m 7.23301 foot pounds ft.lb 0.138255 kg.m 1 7.23301 1 kg/m 0.671971 pounds/foot lb/ft 1.48816 kg/m 1 0.671971 1 kg/l 8.34523 pounds/gallon ppg 0.119829 kg/l 1 8.34523 1 kg/l 62.4278 pounds/cu.ft pcf 0.0160185 kg/l 1 62.4278 1 0.3505 pounds/barrel lb/bbl 2.85307 1 0.3505 1 150.959 barrel/day bbl/day 0.00662433 1 150.959 1 l/m 0.001917 barrel/foot bbl/ft 521.601 l/m 1 0.001917 1 l/m 0.0107640 cu foot/foot cu.ft/ft 92.090289 l/m 1 0.010764 1 l/m 0.0805214 US gallon/foot gal/ft 12.4191 l/m 1 0.0805214 1 l/m 0.0062899 barrel/meter bbl/m 158.984 l/m 1 0.0062899 1 kPa/m 0.0442076 psi/foot psi/ft 22.62055 kPa/m 1 0.0442076 1 bar/m 4.42076 psi/foot psi/ft 0.2262055 bar/m 1 4.42076 1 kPa/m 0.145038 psi/meter psi/m 6.894745 kPa/m 1 0.145038 1 bar/m 14.5038 psi/meter psi/m 0.0689475 kPa/m 1 14.5038 1 kW 1.34102 horse power hp 0.7457 kW 1 1.34102 1 0.69832 Ton.mile Ton.mile 1.43201 1 0.69832 1 negabor@ma m 3 m 3 kg/m 3 kg/m 3 m 3 /h m 3 /h 10 3 daN.km 10 3 daN.km

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Page 1: Drilling Calculation

1. oldal

U N I T C O N V E R S I O N SWritten by Gabor Nemeth

Conversion from metric to Conversion from English to CalculationsEnglish unit metric unit

Metr.symbol Multiply by Eng.name Eng.symbol Multiply by Metr.symbol Metr.quantity Eng.result Eng.quantity Metr.resultmm 0.03937 inches in 25.4 mm 1 0.03937 1 25.4m 3.28084 feet ft 0.3048 m 1 3.28084 1 0.3048m 1.09361 yards yd 0.9144 m 1 1.09361 1 0.9144km 0.621373 miles(land) mile(st) 1.60934 km 1 0.621373 1 1.60934l 0.264178 gallons(US) gal(US) 3.78533 l 1 0.264178 1 3.78533l 0.219976 gallons(UK) gal(UK) 4.54596 l 1 0.219976 1 4.54596l 0.0353147 cubic feet cu.ft 28.3168 l 1 0.0353147 1 28.3168

6.28994 barrel bbl 0.158984 1 6.28994 1 0.158984N 0.224809 pounds lbs 4.44822 N 1 0.224809 1 4.44822kg 2.20462 pounds lbs 0.453592 kg 1 2.20462 1 0.453592kPa 0.145038 psi psi 6.894745 kPa 1 0.145038 1 6.894745Mpa 145.038 psi psi 0.0068947 Mpa 1 145.038 1 0.0068947bar 14.5038 psi psi 0.0689475 bar 1 14.5038 1 0.0689475N.m 0.737561 foot pounds ft.lb 1.35582 N.m 1 0.737561 1 1.35582kg.m 7.23301 foot pounds ft.lb 0.138255 kg.m 1 7.23301 1 0.138255kg/m 0.671971 pounds/foot lb/ft 1.48816 kg/m 1 0.671971 1 1.48816kg/l 8.34523 pounds/gallon ppg 0.119829 kg/l 1 8.34523 1 0.119829kg/l 62.4278 pounds/cu.ft pcf 0.0160185 kg/l 1 62.4278 1 0.0160185

0.3505 pounds/barrel lb/bbl 2.85307 1 0.3505 1 2.85307

150.959 barrel/day bbl/day 0.00662433 1 150.959 1 0.00662433l/m 0.001917 barrel/foot bbl/ft 521.601 l/m 1 0.001917 1 521.601l/m 0.0107640 cu foot/foot cu.ft/ft 92.090289 l/m 1 0.010764 1 92.090289l/m 0.0805214 US gallon/foot gal/ft 12.4191 l/m 1 0.0805214 1 12.4191l/m 0.0062899 barrel/meter bbl/m 158.984 l/m 1 0.0062899 1 158.984kPa/m 0.0442076 psi/foot psi/ft 22.62055 kPa/m 1 0.0442076 1 22.62055bar/m 4.42076 psi/foot psi/ft 0.2262055 bar/m 1 4.42076 1 0.2262055kPa/m 0.145038 psi/meter psi/m 6.894745 kPa/m 1 0.145038 1 6.894745bar/m 14.5038 psi/meter psi/m 0.0689475 kPa/m 1 14.5038 1 0.0689475kW 1.34102 horse power hp 0.7457 kW 1 1.34102 1 0.7457

0.69832 Ton.mile Ton.mile 1.43201 1 0.69832 1 1.43201

[email protected]

m3 m3

kg/m3 kg/m3

m3/h m3/h

103daN.km 103daN.km

G4
Write the appropriate quantity into this column, and read the result in the cell close by
I4
Write the appropriate quantity into this column, and read the result in the cell close by
Page 2: Drilling Calculation

2. oldal

Conversion between metric units Calculations"A" "B" "C" "D" "E" "F"

Metr.symbol Multiply by Metr.symbol Metr.symbol Multiply by Metr. Symbol "A"quantity "C"result "D"quantity "F"resultbar 100 kPa kPa 0.01 bar 1 100 1 0.01bar 0.1 MPa MPa 10 bar 1 0.1 1 10N 0.102 kg kg 9.80665 N 1 0.102 1 9.80665daN 1.02 kg kg 0.980665 daN 1 1.02 1 0.980665N.m 0.102 kg.m kg.m 9.80665 N.m 1 0.102 1 9.80665

Conversion between british units Calculations"A" "B" "C" "D" "E" "F"

Eng.symbol Multiply by Eng.symbol Eng.symbol Multiply by Eng.symbol "A"quantiy "C"result "D"quantity "F"resultin 0.0833333 ft ft 12 in 1 0.0833333 1 12ft 0.333333 yd yd 3 ft 1 0.333333 1 3yd 0.0005682 Mile (stat) Mile (stat) 1760 yd 1 0.0005682 1 1760yd 0.0004929 Mile (naut.) Mile (naut.) 2029 yd 1 0.0004929 1 2029sq in 0.0069444 sq ft sq ft 144 sq in 1 0.0069444 1 144sq ft 0.111111 sq yd sq yd 9 sq ft 1 0.111111 1 9sq yd 0.0002066 acre acre 4840 sq yd 1 0.0002066 1 4840acres 0.0015625 sq mile(stat) sq mile(stat) 640 acre 1 0.0015625 1 640cu in 0.0005787 cu ft cu ft 1728 cu in 1 0.0005787 1 1728gal(US) 0.1336777 cu ft cu ft 7.48068 gal(US) 1 0.1336777 1 7.48068cu ft 0.1781113 bbl bbl 5.614467 cu ft 1 0.1781113 1 5.614467gal(US) 0.0238095 bbl bbl 42 gal(US) 1 0.0238095 1 42oz 0.0625 lbs lbs 16 oz 1 0.0625 1 16lb 0.0005 sh. tn sh. tn 2000 lbs 1 0.0005 1 2000gal/ft 0.1336777 cu.ft/ft cu.ft/ft 7.48068 gal/ft 1 0.1336777 1 7.48068cu.ft/ft 0.1781113 bbl/ft bbl/ft 5.614467 cu.ft/ft 1 0.1781113 1 5.614467gal/ft 0.0238095 bbl/ft bbl/ft 42 gal/ft 1 0.0238095 1 42ppg 7.48068 pcf pcf 0.1336777 ppg 1 7.48068 1 0.1336777

1 0 1 01 0 1 01 0 1 01 0 1 01 0 1 0

G37
Write the appropriate quantity into this column, and read the result in the cell close by
I37
Write the appropriate quantity into this column, and read the result in the cell close by
G45
Write the appropriate quantity into this column, and read the result in the cell close by
I45
Write the appropriate quantity into this column, and read the result in the cell close by
Page 3: Drilling Calculation

3. oldal

KICK SHEET / driller's method in metric units /Written by Gabor Nemeth

Well: Date:Well data Mud pump data

Hole size 8.5 in Pump Pump1.output Pump2.outputOriginal mud density cap. 0.0162 0

OMD 1490 Present pump output in use 0.0162Casing shoe data 9 Slow Pump Pressures/SPP/

Size 9.625 in 9 pump1. pump2.Yield pres. 47300 kPa 118.42105 15 0 kPa 0 kPaM.depth 1900 m 118.42105 20 0 kPa 0 kPaT.V.depth 1900 m 25 0 kPa 0 kPa

Hole depth 30 2800 kPa 0 kPaM.depth 3600 m 35 0 kPa 0 kPaT.V.depth 3600 m 40 0 kPa 0 kPaTVD of bit 3600 m Present Slow Pump Pressure and SCRP.LOT 30 2800 kPaat surface 12000 kPa MW.LOT-Mud weight during test 1240

W.o-gradient of mud in testsurface pressure with original mud W.o=MW.LOT * 9,81/1000 12.16 kPa/m

FBD-Formation breakdown pressure7340 kPa FBD=P.LOT+(TVDcsg.shoe * W.o) 35112 kPa

MW.max-maximum mud weight fbd-formation breakdown gradientMW.max=FBD * 1000/(9,81 * TVDcsg.shoe) fbd=FBD/TVDcsg.shoe 18.48 kPa/mMW.max 1884 W.1-gradient of original mud

W.1=OMD * 9,81/1000 14.62 kPa/m

Pre-recorded data Pump strokes TimeLength m. Volume/pump cap. Pump strs/SPM

Surface line 50 0.009 0.45 28 str. 1 min.3340 0.0091 30.39 1876 str. 63 min.

0 0 0.00 0 str. 0 min.HWDP 0 0 0.00 0 str. 0 min.

260 0.00401 1.04 64 str. 2 min.0 0 0.00 0 str. 0 min.

Drill string volume (surface to bit) 31.89 1968 str. 66 min.OH - without string 0 0.03661 0.00 0 str. 0 min.

260 0.0152 3.95 244 str. 8 min.0 0 0.00 0 str. 0 min.

HWDP-Op hole 0 0 0.00 0 str. 0 min.1440 0.02345 33.77 2084 str. 69 min.

Open hole volume (bit to shoe) 37.72 2328 str. 78 min.0 0 0.00 0 str. 0 min.0 0 0.00 0 str. 0 min.

HWDP-Cas. 0 0 0.00 0 str. 0 min.1900 0.02503 47.56 2936 str. 98 min.

0 0 0.00 0 str. 0 min.Total ann.volume (bit to surface) 85.28 5264 str. 175 min.Total mud volume in the hole 117.16 7232 str. 241 min.Active surface volume 150.00 9259 str. 309 min.

[email protected]

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

m3/str. m3/str.kg/m3 m3/str.

SCR str/min

kg/m3

MAASPOMD-Maximum allowable annulus

MAASPOMD=FBD-((OMD*9,81*TVDcsgshoe)/1000)

MAASPOMD

kg/m3

Cap.m3/m Volume m3

DP1.DP2.

DC1

DC2

DC1-Op holeDC2-Op hole

DP1.-Op hole

DC1-Cas.DC2-Cas.

DP1-Cas.DP2-Cas.

DP

2D

P 1

HW

DP

DC

2

D

C 1

Bit

DP

2D

P 1

HW

DP

DC

2

DC

1

Bit

Page 4: Drilling Calculation

4. oldal

Total volumetotal volume in hole+active surface volume 267.16 16492 str. 550 min.NOTE: basic data readable data calculated dataKick data

SIDPP - Shut in drill pipe pressure 3500 kPaSICP - Shut in casing pressure 5000 kPaGAIN - Pit gain 1.800

Kick calculations

KMD-Kill Mud Density1589

SP-safety pressure /usually 1000kPa/ 0 kPaBarites required 159.53

4200Total barite weight to be added =barite requirement * total volume 42620 kgVolume increase due to barite total barite/barite spec.grav. 10.15ICP-Initial circulating pressure ICP=SIDPP+SPP+SP 6300 kPaFCP-Final circulating pressure FCP=SPP*(KMD/OMD) 2986 kPaE=ICP-FCP 3314 kPaE/Drill string volume in strokes 1.68 kPa/strStatic and circulating pressure behaviour:Strokes Pressure

0 6300100 6132200 5963300 5795400 5627500 5458600 5290700 5122800 4953900 4785

1000 46171100 44481200 42801300 41111400 39431500 37751600 36061700 34381800 32701900 31011968 2986

Expected circulation status of driller's method Strokes Circ.period Pdp Pcsg MAASP 0 Start 6300 5000 7340 2328 6300 5000 7340 4736 6300 8498 12338 5264 Infl. in air 6300 3500 7340 7232 KM at bit 2986 3500 7340 9561 2986 1548 7340 12496 2986 0 5492

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

m3

KMD=OMD+(102 * (SIDPP+SP))/TVD bit kg/m3

(dw * (KMD-OMD))/(dw-KMD) kg/m3

dw- Barite density kg/m3

m3

Infl.at shoe

Infl.at surface

KM at shoe

KM at surface

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static and circulation pressure behaviour /metric unit/

strokes

pre

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ure

/k

Pa

/

E64
It depends on company regulation, but recommended to calculate with the pressure due to Trip Margin
E103
Until this stroke, hold the Pdp on steady by adjustable choke. If kill mud is not ready, circulate with this Pdp and Pcsg until the kill mud gets ready to pump into the hole.
E104
Until this stroke, hold the Pcsg on steady by adjustable choke and from now hold the Pdp again on steady till Pcsg becomes to ~zero
Page 5: Drilling Calculation

5. oldal

NOTE: basic data readable data calculated dataCalculations

P.omd-hidrostatic pressure of the original mudP.omd=(OMD * TVD * 9,81)/1000 52621 kPaP.form-formation pressure P.form=SIDPP+P.omd 56121 kPaH.f-lenght of influx at bottom H.f=Gain/V.ab 118 mr-ratio between bottom hole and surface volumes r=V.ab/V.as 0.61K-ratio between depth and specific gravity 0.72d1-specific gravity 1.49 kg/lM.A.C.P.- Max.annulus casing pressure M.A.C.P= Yield pres.* 0,80 37840 kPaP.Amax-max. annulus pressure

8498 kPaH.s-lenght of influx at surface H.s=(P.form/P.Amax) * K * r * H.f 342 mV.gas-volume of influx at surface V.gas=H.s * V.as/1000 8.56Strokes of V.gas Strokes of V.gas=V.gas/pump input 528 str'sD.influx-density of influx D.influx=OMD-((SICP-SIDPP) * 1000/(9,81 * H.f)) 199Possible Kick Type Gas

1848 kPa5492 kPa

4998 kPa

12338 kPa1500 kPa

Rgm-gas migration 103 mNew Pshoe 34272 kPa

1.85Max.pit gain-pit gain when influx reached the surfaceMax.pit gain=0,158984*4*root2(P.form(psi)*G(bbl)*V.as(bbl/ft)/OMW(ppg)) 12

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

P.Amax=SIDPP/2+root2(SIDPP2/4+9,81 * (K * G * d1 * Pform)/Vas

m3

kg/m3

Dp-pressure changing issued from mud density changing Dp=((KMD-OMD) * 9,81 * csg.shoe depth)/1000MAASPKMD MAASPKMD=MAASPOMD-delta pMAASP+-You can increase the MAASP if the gas reached the surface MAASP+=(OMD * 9,81 * H.s)/1000MAASPgs-MAASP if the gas reached the surface(MAASPmax.)MAASPgs=MAASPOMD+MAASP+=(MAASPmax.)DSICP- SICP changing based on a certain time.

Rgm=DSICP/W1New Pshoe= ((OMW * TVDshoe * 9,81)/1000)+SICP+DSICP

V1=Volume of mud to be bled off due to New PshoeV1=((Phidr+SIDPP) * Gain)/(Phidr+SIDPP-DSICP) m3

m3

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333

0

1000

2000

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7000

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9000

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11000

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15000

6300 6300 6300 6300

2986 2986 2986

5000 5000

8498

3500 3500

1548

0

73

40

73

40

12

33

8

73

40

73

40

73

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54

92

Analysis of driller's method /metric/

Pdp

Pcsg

MAASP

strokes

Pre

ss

ure

s /

kP

a/

G118
There are five main possibilities to assamble the drillstring: - DC1-DC2-HWDP-DP1-DP2 - DC1-HWDP-DP1-DP2 - DC1-DC2-DP1-DP2 - DC1-DP1-DP2 - DP1-DP2 Since the DP2 never enters into the open hole, we can leave it out of consideration. The length of influx at bottom depends on the relation of drill-string and bottom hole. It means about thirty-two vari- ations to calculate the length of influx at bottom This program takes all of the main variations into conside-ration.
F120
See on "K" diagram
F128
If density of influx is: - 180 - 360 kg/m3 = gas - 600 - 839 kg/m3 = oil -1030 -1438 kg/m3 = saltwater
F137
If the procedure is paused for any time(before the influx is circulated above the shoe), the Pcsg will increase due to gas migration. In this case read and record the Pcsg increasing into the cell close by.
F139
If New Pshoe>FBD, bleed off mud.
I144
This diagram is based on the "Expected cir-culation status of driller's method" chart
Page 6: Drilling Calculation

6. oldal

NOTE: basic data readable data calculated data

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.3950617284 4735.69667459291 5264.01234567901 7232.32098765432 9560.71604938272 12496.3333333333

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

11000

12000

13000

14000

15000

6300 6300 6300 6300

2986 2986 2986

5000 5000

8498

3500 3500

1548

0

73

40

73

40

12

33

8

73

40

73

40

73

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54

92

Analysis of driller's method /metric/

Pdp

Pcsg

MAASP

strokesP

res

su

res

/k

Pa

/

Page 7: Drilling Calculation

7. oldal

KICK SHEET / driller's method in field units /Written by Gabor Nemeth

WELL: DATE:

Well data Mud pump dataHole size 8 1/2 in Pump Pump1.output Pump2.output

Original mud density cap. 0.1019 bbl/str 0.098 bbl/strOMD 12.43 ppg Present pump output in use 0.1019 bbl/str

Casing shoe data 9 Slow Pump Pressures/SPP/Size 9 5/8 in 9 pump1. pump2.Yield pres. 6860 psi 388.5611 15 130 psi 110 psiM.depth 6234 ft 388.5611 20 190 psi 170 psiTV.depth 6234 ft 25 270 psi 240 psi

Hole depth 30 406 psi 350 psiM.depth 11811 ft 35 490 psi 420 psiTV.depth 11811 ft 40 560 psi 500 psiTVD of bit 11811 ft Present Slow Pump Pressure and SCRP.of LOT 30 406 psiat surface 1740 psi MW.LOT-Mud weight during test 10.35 ppg

W.o-gradient of mud in testsurface pressure with original mud W.o=MW.LOT * 0,052 0.54 psi/ft

FBD-Formation breakdown pressure1064 psi FBD=P.ofLOT+(TVDcsg.shoe * W.o) 5095 psi

MW.max-maximum mud weight fbd-formation breakdown gradientMW.max=FBD/(0,052 * TVDcsgshoe) fbd=FBD/TVDcsg.shoe 0.82 psi/ftMW.max 15.72 ppg W.1-gradient of original mud

W.1=OMD * 0,052 0.65 psi/ft

Pre-recorded data Pump strokes TimeLength ft Cap.bbl/ft Vol.bbl Volume/pump cap. Pump strs/SPM

Surface line 164 0.017 2.79 27 str. 1 min.DP.1 10958.01 0.017445 191.16 1876 str. 63 min.DP.2 0 0 0.00 0 str. 0 min.HWDP 0 0 0.00 0 str. 0 min.

853.02 0.007687 6.56 64 str. 2 min.0.00 0 0.00 0 str. 0 min.

Drill string volume (surface to bit) 200.51 1968 str. 66 min.OH - without string 0 0.070187 0.00 0 str. 0 min.

853.02 0.029138 24.86 244 str. 8 min.0.00 0 0.00 0 str. 0 min.

HWDP-OP.hole 0 0 0.00 0 str. 0 min.DP.1-Op.hole 4724.41 0.044954 212.38 2084 str. 69 min.Open hole volume (bit to shoe) 237.24 2328 str. 78 min.

0 0 0.00 0 str. 0 min.0 0 0.00 0 str. 0 min.

HWDP-Csg 0 0 0.00 0 str. 0 min.DP.1-Csg 6233.60 0.047983 299.11 2935 str. 98 min.DP.2-Csg 0 0 0.00 0 str. 0 min.Total ann.volume (bit to surface) 536.34 5263 str. 175 min.Total mud volume in the hole 736.85 7231 str. 241 min.Active surface volume 943.49 9259 str. 309 min.

[email protected]

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

SCR str/min

MAASPOMD-Maximum allowable annulus

MAASPOMD=FBD-(OMD*0,052*TVDcsgshoe)

MAASPOMD

DC1

DC2

DC1-Op.holeDC2-Op.hole

DC1-CsgDC2-Csg

DP

2D

P 1

HW

DP

DC

2

DC

1

Bit

A1
The driller's method of killing a well kick is accomplished in two circulation cycles. In the first circulation cycle, the influx is circulated out of the hole with original mud by keeping the Pdp on steady. After the annulus is clear of invading fluid, the well is closed in. The mud weight is adjusted to required density. In the second circulation cycle, the original mud is circulated out of the hole with new kill mud. Until the kill mud does not reach the bit, the Pcsg is kept constant. When the kill mud is at the bit, maintain the calculated Final Circulation Pressure, till the kill mud reaches the surface. Disadvantages of the method are the high annulus pressure / in case of gas kick / and the two circulations.
E9
The SCR being half or less of drilling pump rate. Establish it at the: -50% of drilling pump rate, -33% of drilling pump rate, -25% of drilling pump rate, For the following reasons: -Mud velocity in the annulus is reduced to the extent that cuttings are not transported to the surface anymore; this reduces the chance that the chokes get plugged while killing. Annular mud velocity must be less than 50 ft/min. -The chokes, wheter adjustable or manual, can operate in the proper orifice range. -It allows the operator more time to react when well killing or mechanical problems develop. -It allows the crew more time to mix the kill mud.
F9
Slow rate circula-tion pressure has to be established: -at the beginning of each shift, -after each BHA changing, -after each mud property changing, -after each mud pump repairing, -after each 100 m drilling.
Page 8: Drilling Calculation

8. oldal

Total volumetotal volume in hole+active surface volume 1680.34 16490 str. 550 min.NOTE: basic data readable data calculated dataKick data

SIDPP-Shut in drill pipe pressure 508 psiSICP-Shut in casing pressure 725 psiGain-Pit gain 11.32 bbl

Kick calculations

KMD-Kill mud density13.26 ppg

SP-safety pressure /usually 145 psi/ 0 psiBarite required 55.88 lb/bbl

35.05 ppgTotal barite weight to be added =barite requirement * total volume 93903 lbsVolume increase due to barite total barite/barite dens * 42 63.8 bblsICP-Initial circulating pressure ICP=SIDPP+SPP+SP 914 psiFCP-Final circulating pressure FCP=SPP*(KMD/OMD) 433 psiE=ICP-FCP 481 psiE/Drill string volume in strokes 0.24 psi/strStatic and circulating pressure behaviourstrokes pressure

0 914100 890200 865300 841400 816500 792600 767700 743800 718900 694

1000 6701100 6451200 6211300 5961400 5721500 5471600 5231700 4981800 4741900 4501968 433

Expected circulation status of driller's method Strokes Circ.period Pdp Pcsg MAASP 0 Start 914 725 1064 2328 914 725 1064 4735 914 1233 1790 5263 914 508 1064 7231 433 508 1064 9559 433 225 1064 12495 433 0 796

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

KMD=OMD+(SIDPP+SP)/(TVD bit * 0,052)

((dw x (KMW-OMW))/(dw-KMW)dw-Barite density

Infl.at shoe

Infl.at surface

Infl. in air

KM at bit

KM at shoe

KM at surface

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static and circulating pressure behaviour /field units/

strokes

pre

ss

ure

/p

si/

E64
It depends on company regulation, but recommended to calculate with the pressure due to Trip Margin
E65
dw(lbs/bbl)*/KMW-OMW/(lbs/ft3) dw(lbs/ft3)-KMW(lbs/ft3)
E100
Open choke while bringing up pump speed to slow circulating rate. Increase pump rate slowly and hold Pcsg constant until the pump rate reaches the slow circulating rate and after hold Pdp on steady.
E103
Until this stroke, hold the Pdp on steady by adjustable choke. If kill mud is not ready, circulate with this Pdp and Pcsg until the kill mud gets ready to pump into the hole.
E104
Until this stroke hold the Pcsg on steady by adjustable choke and from now hold the Pdp again on steady till Pcsg becomes to ~zero
Page 9: Drilling Calculation

9. oldal

NOTE: basic data readable data calculated dataCalculations

P.omd-hidrostatic pressure of the original mudP.omd=OMD * TVD * 0,052 7637 psiP.form-formation pressure P.form=SIDPP+P.omd 8145 psiH.f-lenght of influx at bottom H.f=G/V.ab 389 ftr-ratio between bottom hole and surface volumes r=V.ab/V.as 0.61K-ratio between depth and specific gravity 0.72d1-original mud specific gravity 1.49 kg/lM.A.C.P.-max.annulus casing pressure M.A.C.P.=Yield pres.* 0,80 5488 psiP.Amax.-max. annulus pressure

1233 psiH.s-lenght of influx at surface H.s=P.form/P.Amax * (K * r * H.f) 1122 ftV.gas-volume of influx at surface V.gas=H.s * V.as 53.84 bblStrokes of V.gas Strokes of V.gas=V.gas/pump input 528 str'sD.influx-density of influx D.influx=OMD-(SICP-SIDPP)/(H.f * 0,052) 1.69 ppgPossible Kick Type Gas

268 psi796 psi

MAASP+=(OMD-D.influx) * H.s * 0,052 726 psiMAASPgs-if the gas reached the surface(MAASPmax.)

1790 psi218 psi

Rgm-gas migration 336 ft4973 psi

12 bblMax.pit gain-pit gain when influx reached the surfaceMax.pit gain=4 * root2((P.form * G * W1)/OMW) 75 bbl

Fill in ONLY the blue & yellow cells with data and the program will calculate by itself !!!

P.Amax=(SIDPP(kPa)/2+root2(SIDPP(kPa)2/4+9,81*(K*G(m3)*d1*Pform(kPa))/Vas(m3))*0,145038

Dp-pressure changing issued from mud density changingDp=(KMD-OMD) * 0,052 * csg.shoe depthMAASP KMD MAASP KMD=MAASP1-delta p.MAAS+-you can increase the MAASP if the gas reached the surface

MAASPgs=MAASPOMD+MAASP+= (MAASPmax.)DSICP- SICP changing based on a certain time.

Rgm=DSICP/W1New Pshoe New Pshoe=(OMW * TVDshoe * 0,052)+SICP+DSICPV1=Volume of mud to be bled off due to New PshoeV1=((Phidr+SIDPP) * Gain)/(Phidr+SIDPP-DSICP)

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

914 914 914 914

433 433 433

725 725

1233

508 508

225

0

10

64

10

64

17

90

10

64

10

64

10

64

79

6

Analysis of driller's method /field unit/

Pdp

Pcsg

MAASP

strokes

Pre

ss

ure

s /

ps

i/

G118
There are five main possibilities to assamble the drillstring: - DC1-DC2-HWDP-DP1-DP2 - DC1-HWDP-DP1-DP2 - DC1-DC2-DP1-DP2 - DC1-DP1-DP2 - DP1-DP2 Since the DP2 never enters into the open hole, we can leave it out of consideration. The length of influx at bottom depends on the relation of drill-string and bottom hole. It means about thirty-two vari- ations to calculate the length of influx at bottom This program takes all of the main variations into conside-ration.
F120
See on "K" diagram
F128
If density of influx is: -1,5 - 3,0 ppg = gas -5,0 - 7,0 ppg = oil -8,6 - 12 ppg = saltwater
F137
If the procedure is paused for any time(before the influx is circulated above the shoe), the Pcsg will increase due to gas migration. In this case read and record the Pcsg increasing into the cell close by.
F139
IF New Pshoe>FBD, bleed of mud
I144
This diagram is based on the "Expected cir-culation status of driller's method" chart
Page 10: Drilling Calculation

10. oldal

NOTE: basic data readable data calculated data

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

914 914 914 914

433 433 433

725 725

1233

508 508

225

0

10

64

10

64

17

90

10

64

10

64

10

64

79

6

Analysis of driller's method /field unit/

Pdp

Pcsg

MAASP

strokesP

res

su

res

/p

si/

Page 11: Drilling Calculation

11. oldal

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

914 914 914 914

433 433 433

725 725

1233

508 508

225

0

10

64

10

64

17

90

10

64

10

64

10

64

79

6

Analysis of driller's method /field unit/

Pdp

Pcsg

MAASP

strokes

Pre

ss

ure

s /

ps

i/

Page 12: Drilling Calculation

12. oldal

Start Infl.at shoe Infl.at surface Infl. in air KM at bit KM at shoe KM at surface0 2328.12931579195 4735.02667590036 5263.42506523258 7231.11531931305 9559.244635105 12494.5403845456

0

200

400

600

800

1000

1200

1400

1600

1800

2000

2200

914 914 914 914

433 433 433

725 725

1233

508 508

225

0

10

64

10

64

17

90

10

64

10

64

10

64

79

6

Analysis of driller's method /field unit/

Pdp

Pcsg

MAASP

strokes

Pre

ss

ure

s /

ps

i/

Page 13: Drilling Calculation

Depth Balancing specific gravity Depth Balancing specific gravity

meter1.2 1.5 1.8 2.1

meter1,2 kg/l 1,5 kg/l 1,8 kg/l 2,1 kg/l

Coefficient "K" Coefficient "K"0 1.86 1.85 1.84 1.83 5300 0.6 0.55 0.5 0.46

100 1.81 1.8 1.79 1.77 5400 0.595 0.54 0.495 0.45200 1.76 1.73 1.72 1.71 5500 0.59 0.535 0.49 0.445300 1.7 1.67 1.61 1.6 5600 0.58 0.53 0.48 0.44400 1.65 1.61 1.55 1.54 5700 0.57 0.52 0.475 0.43500 1.6 1.55 1.5 1.49 5800 0.565 0.515 0.47 0.425600 1.57 1.52 1.45 1.43 5900 0.56 0.51 0.46 0.42700 1.52 1.47 1.41 1.39 6000 0.555 0.5 0.455 0.41800 1.48 1.43 1.35 1.33 6100 0.55 0.495 0.45 0.4900 1.44 1.38 1.31 1.27 6200 0.54 0.49 0.445 0.395

1000 1.41 1.35 1.28 1.24 6300 0.535 0.485 0.44 0.391100 1.38 1.31 1.24 1.2 6400 0.53 0.48 0.435 0.3851200 1.35 1.27 1.2 1.16 6500 0.525 0.47 0.425 0.381300 1.32 1.24 1.16 1.12 6600 0.52 0.465 0.42 0.3751400 1.29 1.21 1.13 1.08 6700 0.51 0.46 0.415 0.371500 1.25 1.17 1.1 1.05 6800 0.505 0.455 0.41 0.3651600 1.22 1.14 1.07 1.01 6900 0.5 0.45 0.4 0.361700 1.2 1.12 1.04 0.98 7000 0.495 0.445 0.395 0.3551800 1.17 1.09 1.01 0.95 71001900 1.14 1.05 0.98 0.92 72002000 1.12 1.03 0.96 0.9 73002100 1.09 1.01 0.93 0.87 74002200 1.06 0.98 0.91 0.85 75002300 1.04 0.95 0.88 0.82 76002400 1.01 0.93 0.86 0.8 77002500 0.99 0.9 0.84 0.78 78002600 0.97 0.88 0.82 0.76 79002700 0.95 0.86 0.8 0.74 80002800 0.93 0.84 0.78 0.722900 0.91 0.82 0.76 0.73000 0.89 0.81 0.75 0.69 0.81 0.793100 0.87 0.79 0.73 0.673200 0.85 0.77 0.72 0.663300 0.83 0.75 0.7 0.653400 0.82 0.74 0.69 0.633500 0.8 0.73 0.67 0.623600 0.79 0.71 0.66 0.613700 0.77 0.7 0.65 0.63800 0.76 0.69 0.64 0.593900 0.74 0.68 0.63 0.584000 0.73 0.67 0.62 0.574100 0.72 0.65 0.61 0.564200 0.7 0.64 0.6 0.554300 0.69 0.63 0.59 0.544400 0.68 0.62 0.58 0.534500 0.67 0.61 0.57 0.524600 0.66 0.6 0.56 0.514700 0.65 0.59 0.55 0.54800 0.64 0.585 0.54 0.494900 0.63 0.58 0.53 0.4855000 0.625 0.575 0.525 0.48

03

00

60

09

00

12

00

15

00

18

00

21

00

24

00

27

00

30

00

33

00

36

00

39

00

42

00

45

00

48

00

51

00

54

00

57

00

60

00

63

00

66

00

69

00

72

00

75

00

78

00

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

Balancing mud spec.gravity

1.2

1.5

1.8

2.1

m

"K"

Page 14: Drilling Calculation

5100 0.62 0.565 0.52 0.475200 0.61 0.56 0.51 0.465

03

00

60

09

00

12

00

15

00

18

00

21

00

24

00

27

00

30

00

33

00

36

00

39

00

42

00

45

00

48

00

51

00

54

00

57

00

60

00

63

00

66

00

69

00

72

00

75

00

78

00

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

Balancing mud spec.gravity

1.2

1.5

1.8

2.1

m

"K"

Page 15: Drilling Calculation

03

00

60

09

00

12

00

15

00

18

00

21

00

24

00

27

00

30

00

33

00

36

00

39

00

42

00

45

00

48

00

51

00

54

00

57

00

60

00

63

00

66

00

69

00

72

00

75

00

78

00

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

Balancing mud spec.gravity

1.2

1.5

1.8

2.1

m

"K"

Page 16: Drilling Calculation

03

00

60

09

00

12

00

15

00

18

00

21

00

24

00

27

00

30

00

33

00

36

00

39

00

42

00

45

00

48

00

51

00

54

00

57

00

60

00

63

00

66

00

69

00

72

00

75

00

78

00

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

Balancing mud spec.gravity

1.2

1.5

1.8

2.1

m

"K"

Page 17: Drilling Calculation

17. oldal

LEAK OFF TESTPreparations

1. Drill out the casing shoe. / be sure, there is no flapper valve in the string !/2. Drill ahead 5-50 ft; (1.5-15 m.) / it depends on company regulation /.3. Circulate for conditioning mud in the hole. /no cuttings in the mud !/4. Get ready a cementing pump with a sensitive pressure gauge.5. Calculate the pressure loss due to gel strength of mud.6. Pull the string above the casing shoe.Data Metric unit Field unitL = length of string 2743.2 m 9000 ft

10 10d = DP ID 3 3/16 in 3 3/16 in

8 1/2 in 8 1/2 in5 in 5 in

2743.2 m 9000 ftTMW = mud weight during LOT 1240 10.35 ppg

Calculations of pressure losses

Formula to be used, when LOT is performed through DP

94 psi649 kPa

Formola to be used, when LOT is performed on annulus

86 psi591 kPa

Procedure

1. Fill up cementing line & bell nipple with mud by cementing pump and stop pump.2. Close BOP / bag type or pipe rams /3. Start cementing pump slowly and as soon as pressure starts to show on the gauge,

4. Wait some 3 minutes and plot pressure versus volume.

the graph.6. Continue this way until the pressure increase becomes less than the previous increase i.e. the line on the graph starts bending to the right. This point is the leak off point and gives the value for the MAASP.

off has now started and the pressure reached is the formation break down pressure.8. Bleed-off pressure, check returns and very carefully repeat pressure building up to get a check on the result.9. At the end, correct the leak off pressure with Pgs and the result gives the real leak off

to = yield value of mud lb/100ft2 lb/100ft2

dc = casing IDdo = DP ODTVDcsg.shoe = true vertical depth of casing shoe

kg/m3

Fill in ONLY the section above with data and the program will calculate by itself !!!

Pgs-pressure loss due to gel strength of mud

Pgs=L x (to/(300 x d)) / field unit /Pgs=L x (to/(13,2623 x d)) / metric unit /

Pgs=L x (to/(300 x (dc-do)) / field unit /Pgs=L x (to/(13,2623 x (dc-do)) / metric unit /

pump 1/2 bbl / 0,08 m3 / more and stop pump.

5. Pump 1/2 bbl / 0,08 m3 / more, stop pump, wait 3 minutes and plot the next point on

7. Pump less volume ( say 1/4 bbl / 0,04 m3 /), wait and plot this point on the graph. Leak

E13
If LOT is performed on annulus, enter "0" to the "F14" and "H14" cells!
E14
If LOT is performed through DP, enter "0" to the "F15" and "H15" cells!
E15
If LOT is performed through DP, enter "0" to the "F16" and "H16" cells!
Page 18: Drilling Calculation

18. oldal

pressure.

Chart / field unit /

Pres. psi Vol. bbl Time min0 0 0

510 0.5 11020 1 21530 1.5 32040 2 42580 2.5 52620 3 62520 3.5 72480 4 82440 92350 102300 112240 122200 132200 142200 152200 162200 172200 18

Fill in this chart with data

Leak off point pressure (read on graph and write here) 2580 psi

2486 psi2494 psi

Real leak off pressure determines the Maximum Allowable Annulus Surface Pressure.

10. IMPORTANT: Do not break the formation but stop when leak off starts!!!

Calculation of real Leak Off Pressure /PLOT/

PLOT= Leak off point pressure (read on graph) - pressure loss due to gel strenght

PLOT when LOT is performed through DPPLOT when LOT is performed on annulus

0 1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

16

17

18

0

250

500

750

1000

1250

1500

1750

2000

2250

2500

2750

3000

3250

3500

3750

4000

510

102

0

153

0

204

0

258

0

262

0

252

0

248

0

244

0

235

0

230

0

224

0

220

0

220

0

220

0

220

0

220

0

220

0

Leak Off Test

Time /min/

Pre

ssu

re /

psi

/

Page 19: Drilling Calculation

19. oldal

New Mud Weight /NewMW/ ( write here ) 10.35 ppg

MAASPnew mud- MAASP with new mud weight

2486 psi

Chart / metric unit /

Pres.kPa Time min

0 0 03516 0.16 17032 0.32 2

10548 0.48 314064 0.64 417788 0.8 518133 0.88 617926 0.96 716547 0.96 815996 915720 1015582 1115513 1215478 1315444 1415444 1515444 1615444 1715444 18

Fill in this chart with data

Leak off point pressure (read on graph and write here) 17788 kPa

17139 kPa17197 kPa

PLOT=MAASP. MAASP has to be recalculated for the appropriate mud weight.

MAASPnew mud=MAASP-((NewMW-TMW) x 0,052 x TVDcsg.shoe)

Vol. m3

Calculation of real Leak Off Pressure /PLOT/

PLOT= Leak off point pressure (read on graph) - pressure loss due to gel strenght

PLOT when LOT is performed through DPPLOT when LOT is performed on annulus

0 1 2 3 4 5 6 7 8 9

10

11

12

13

14

15

16

17

18

0

1000

2000

3000

4000

5000

6000

7000

8000

9000

10000

11000

12000

13000

14000

15000

16000

17000

18000

19000

20000

21000

22000

23000

24000

351

6

703

2

105

48

140

64

177

88

181

33

179

26

165

47

159

96

157

20

155

82

155

13

154

78

154

44

154

44

154

44

154

44

154

44

Leak Off Test

Time /min/

Pre

ssu

re /

kPa/

Page 20: Drilling Calculation

20. oldal

Real leak off pressure determines the Maximum Allowable Annulus Surface Pressure.

New Mud Weight /NewMW/ ( write here ) 1240

17139 kPa

PLOT=MAASP. MAASP has to be recalculated for the appropriate mud weight.

kg/m3

MAASPnew mud- MAASP with new mud weightMAASPnew mud=MAASP-(((NewMW-TMW) x 9,81 x TVDcsg.shoe)/1000)

Page 21: Drilling Calculation

Volumetric StrippingWritten by Vilmos Barka

Procedure: 1. Closing in the well. Determine the influx volume.Record pressure at two minute intervals. After closed-in pressures have stabilized complete strip sheet. Further record pressures at five minute intervals or after running in each stand. 2. Determine the volume of mud in the OH/DC annulus equivalent to one psi of hydrostatic head. Equivalent volume per psi = Ann. Volume per ft / Mud gradient ( bbl/psi ) 3. Determine a convenient working pressure increment PW. 4. Convert a selected working pressure PW /psi/ into an equivalent working

5. Determine the extra back pressure. 6. Adjust the closing pressure on the annular preventer to a minimum, avoid leakage. 7. Allow annulus pressure to build up to Pchoke whilst stripping the first stand. Pchoke = P an. + PS +PW P an > initial closed-in annulus pressure before second built up PS > allowance for the loss of hydrostatic head as DC enter the influx PW > working pressure increment 8. Maintain Pchoke constant whilst stripping pipe. Closed-end displacement of drillpipe is purged into the trip and stripping tank. 9. Avoid excessive surge pressure.

has accumulated into the trip tank.

tank at constant choke pressure, Pchoke is allowed increase again by the value PW now becomes Pchoke (where Pchoke 1 = Pchoke + PW )12.Fill each stand and remove any sharp edges or tong marks from the pipe body.13.By repeating this cycle is maintained nearly constant BHP14. Any data should be record 15.On bottom the well can be kill using the " driller's method ". Be sure the string is full of mud. Pump slow rate from the bit to the Gray-valve. Stop pump, check trapped pressure and then continue circulation.16.To avoid differential sticking consider moving the string trough the preventer.

[email protected]

volume a DV in the OH/DC annulus. ( Recommended 40-50 psi )

10.Maintain Pchoke constant at the above value until a volume of DV barrels

11.When the additional mud volume DV barrels has accumulated in the trip

Page 22: Drilling Calculation
Page 23: Drilling Calculation

Written by Vilmos Barka

Measured depth 0 ft DC C/E cap.: lb/ft

Csg. Measured depth 0 ft Open hole capacity: 0.0681 bbl/ft

Total length of DP 9433 ft OH/DC ann volume: 0.0302 bbl/ft

Number of DP stand 100 mud weight: 15 ppg

DP closed-end cap.: 0.0252 bbl/ft Influx volume: 9.5 bbl

DP capacity: 0 bbl/ft Pressure annulus: 180 psi

DP metal cap.: 0 bbl/ft Pressure drillpipe: 0 psi

19.50 lb/ft Working pres.incr.(Pw) 40 psi

6.25 in influx gradient (pi) : 0.1 psi/ft

Cylindrical Tank Rectangle Tank

Dia (ft ) H ( ft ) W ( ft ) L ( ft ) H ( ft )

Dimensions of trip tank: 3.2 8 4 4 8

Dimensions of strip tank: 3.2 8 4 4 4

Pre Kick Information (to be record on standard kill sheet ) !

Calculation of Wellbore force ( WBF )

WBF= 6522 lbs

1000 lbs

Hence: Minimum necessery weight of string to perform the procedure 6522 lbs

Calculation of minimum necessery length of string

434 ft

Buoyancy factor= Buoyancy factor = ( 65,5 - MW ) / 65,5 0.77

Hence: Minimum necessery length of string to perform the procedure 434 ft

Trip Tank:

Total volume 11.45 bbl 22.80 bbl

Volume per inch 0.12 bbl/in 0.24 bbl/in

Volume per cm 0.05 bbl/cm 0.09 bbl/cm

Stripping Tank:Total volume 11.45 bbl 11.40 bbl

Volume per inch 0.12 bbl/in 0.24 bbl/in

Volume per cm 0.05 bbl/cm 0.09 bbl/cm

Stripping worksheet ( field unit )[email protected]

Nominal weight of DP ( Wdp )

Tool joint OD ( ODtj )

Fill in ONLY the section above and the program will calculate by itself !!!

WBF = (ODtj)^2 x 0,7854 x Pann + Ffr

Friction factor ( Ffr )

Length of string ( Ldp )= Ldp= WBF / ( Wdp x BF )

Page 24: Drilling Calculation

Closed-end Displacement of DP Stand:Average stand length 94 ft

DP C/E displacement 2.38 bbl/stand

F factor calculation:F = F= ( 1 / OH cap.) X ( p1 - pi ) X ((Ohcap / [OH/DC ann.cap] ) - 1 ) 12.5 psi/bbl

mud gradient (p1): 0.78 psi/ft

Calculation of the volume in the OH/DC ann. equivalent to the selected loss of hydrostatic pressure. For one psi loss of hydrostatic pressure we calculate the volume.

OH/DC ann.vol. per ft. / mud gradient 0.04 bbl/psi

Equivalent volume of the selected Pw increment 1.55 bbl

The volume per inch in the trip tank 0.12 bbl/inch 0.24 bbl/in

The selected Pw /psi/ increment is equivalent 13 inch 6 1/2 in

Calculations for Pchoke :

Pchoke = Pchoke = Pan + Ps + Pw 339 psi

Ps = Ps = Inf.vol. / OH cap. X (p1-pi) X (( OH cap /[OH/ DCann. Cap]) - 119 psi

Ps = Ps = F x influx volume ( bbls ) 119 psi

Pan > initial close-in pressure before 2nd build-up. Reading from Ann. press. gauge.

Ps > allowance for the loss of hydrostatic head as DC enter the influx.

Pw > selected, set for yourself. ( recommended 40-50 psi )

F > derived factor

Procedure:1, Allow Pan to become Pchoke Pchoke= Pann + Ps + Pw 339 psi

2, After running each stand bleed-off into the stripping tank 2.38 bbl

19 8/9 in 10 in3, When the level in the trip tank increases 6 1/2 in, increase Pchoke 40 psi

13 in, increase Pchoke 40 psi

4, Repeat this cycle until bit is on bottom.

Equivalent Working Volume for Volumetric Steps D V:

DV =

D V > triptank level increase per Pw step

Page 25: Drilling Calculation

Strip Sheet

Pchoke= Pchoke = Pann +Ps +Pw 339 psi

P annulus 180 psi

F-factor 12.5 psi/bbl

Volume Influx 9.5 bbls

Ps = Ps = F x Vi 119 psi

Pw selected 40 psi

in (cm)

Time Stand no. Pchoke T.T.level Remarks Triptank level with req. Pchoke

T.T. -level Pch

DV= division in triptank

Page 26: Drilling Calculation
Page 27: Drilling Calculation

Written by Vilmos Barka

Measured depth 0 m DC C/E cap.:

Csg. Measured depth 0 m Open hole capacity: 0.03552

Total length of DP 2875.2 m OH/DC ann volume: 0.01575

Number of DP stand 100 mud weight: 1797

DP closed-end cap.: 0.01314 Influx volume: 1.51

DP capacity: 0 Pressure annulus: 1241 Kpa

DP metal cap.: 0 Pressure drillpipe: 0 Kpa

29.02 kg/m 276 Kpa

158.75 mm influx gradient (pi) : 2.26 Kpa/m

Cylindrical Tank Rectangle Tank

Dia (m ) H ( m ) W (m) L ( m ) H ( m )

Dimensions of trip tank: 0.975 2.44 1.22 1.22 2.44

Dimensions of strip tank: 0.975 2.44 1.22 1.22 1.22

Pre Kick Information (to be record on standard kill sheet ) !

Calculation of Wellbore force ( WBF )

WBF= WBF = ((ODtj)^2 x p/4 x Pann x 1,02)+ Ffr 2959 kg

454 kg

Hence: Minimum necessery weight of string to perform the procedure 2959 kg

Calculation of minimum necessery length of string

132 m

Buoyancy factor= Buoyancy factor=1-(mud dens./steel dens.) 0.77

Hence: Minimum necessery length of string to perform the procedure 132 m

Trip Tank:

Total volume 1.82 3.62

Volume per cm 7.46 l/cm 14.86 l/cm

Stripping Tank:Total volume 1.82 1.81

Volume per cm 7.46 l/cm 14.86 l/cm

Stripping worksheet ( metric unit )[email protected]

m3/m

m3/m

m3/m

kg/m3

m3/m m3

m3/m

m3/m

Nominal weight of DP ( Wdp ) Working pres.incr.(Pw)

Tool joint OD ( ODtj )

Fill in ONLY the section above and the program will calculate by itself !!!

Friction factor ( Ffr )

Length of string ( Ldp )= Ldp= WBF / ( Wdp x BF )

m3 m3

m3 m3

Page 28: Drilling Calculation

Closed-end Displacement of DP Stand:Average stand length 28.75 m

DP C/E displacement 0.378

F factor calculation:F = F= ( 1 / OH cap.) X ( p1 - pi ) X ((Ohcap / [OH/DC ann.cap] ) - 1 ) 543

mud gradient (p1): 17.63 Kpa/m

Calculation of the volume in the OH/DC ann. equivalent to the selected loss of hydrostatic pressure. For one psi loss of hydrostatic pressure we calculate the volume.

OH/DC ann.vol. per m / mud gradient 0.00089

Equivalent volume of the selected Pw increment 0.246

The volume per cm in the trip tank 7.46 l/cm 14.86 l/cm

The selected Pw /Kpa/ increment is equivalent 33 cm 16.6 cm

Calculations for Pchoke :

Pchoke = Pchoke = Pan + Ps + Pw 2337 Kpa

Ps = Ps = Inf.vol. / OH cap. X (p1-pi) X (( OH cap /[OH/ DCann. Cap]) - 820 Kpa

Ps = 820 Kpa

Pan > initial close-in pressure before 2nd build-up. Reading from Ann. press. gauge.

Ps > allowance for the loss of hydrostatic head as DC enter the influx.

Pw > selected, set for yourself. ( recommended 300 Kpa )

F > derived factor

Procedure:1, Allow Pan to become Pchoke Pchoke= Pann + Ps + Pw 2337 Kpa

2, After running each stand bleed-off into the stripping tank 0.38

50.6 cm 25.4 cm3, When the level in the trip tank increases 16.6 cm, increase Pchoke 276 Kpa

33 cm, increase Pchoke 276 Kpa

4, Repeat this cycle until bit is on bottom.

m3/stand

Kpa/m3

Equivalent Working Volume for Volumetric Steps D V:

DV = m3/Kpa

m3

Ps = F x influx volume ( m3 )

D V > triptank level increase per Pw step

m3

Page 29: Drilling Calculation

Strip Sheet

Pchoke= Pchoke = Pann +Ps +Pw 2337 Kpa

P annulus 1241 Kpa

F-factor 543

Volume Influx 1.51

Ps = Ps = F x Vi 820 Kpa

Pw selected 276 Kpa

cm

Time Stand no. Pchoke T.T.level Remarks Triptank level with req. Pchoke

T.T. -level Pch

Kpa/m3

m3

DV= division in triptank

Page 30: Drilling Calculation
Page 31: Drilling Calculation

31. oldal

General data

Open hole capacitysize in " cap.in l/m cap.in bbl/m cap.in bbl/ft

26 342.5 2.1543 0.65716 129.72 0.816 0.249

12 1/4 76.04 0.4783 0.1468 1/2 36.61 0.2303 0.07

6 18.24 0.1147 0.035

Capacity of csg.size in " weight in lb/ft cap.in l/m cap.in bbl/m cap.in bbl/ft

9 5/8 53.5 36.92 0.232 0.0707769 5/8 47 38.19 0.24 0.07321

7 32 18.82 0.1184 0.0361

Capacity of DPsize in " weight in lb/ft grade metal displ. capacity total displ. dimension

3 1/2 15.5 S-135 3.19 3.41 6.6 l/m0.0201 0.02145 0.0415 bbl/m0.0061 0.00654 0.01265 bbl/ft

5 19.5 S-135 4.28 8.97 13.24 l/m0.02692 0.05642 0.08334 bbl/m

0.0082 0.00172 0.02538 bbl/ft

Capacity of HWDPsize in" weight in lb/ft metal displ. capacity total displ. dimension

3 1/2 25.33 4 4/5 2.19 7 l/m0.030254 0.013775 0.044029 bbl/m0.009221 0.004198 0.013419 bbl/ft

5 49.32 9 3/8 4.61 13.97 l/m0.0589 0.029 0.0879 bbl/m

0.01794 0.00884 0.0268 bbl/ft

Capacity of DCsize in" weight in lb/ft ID in" metal displ. capacity total displ. dimension

4 3/4 46.77 2 1/4 8.87 2.56 11.43 l/m0.0558 0.0161 0.0719 bbl/m

0.017004 0.004908 0.021911 bbl/ft4 3/4 39.15 2 13/16 7.422 4.008 11.43 l/m

0.0467 0.0252 0.0719 bbl/m0.0142 0.0077 0.021911 bbl/ft

6 1/4 90.85 2 1/4 17.23 2.56 19.79 l/m0.1084 0.0161 0.1245 bbl/m

0.033 0.005 0.038 bbl/ft6 1/2 91.79 2 4/5 17.4 4.01 21.41 l/m

0.1094 0.0252 0.135 bbl/m0.0334 0.0077 0.041 bbl/ft

8 149.92 2 4/5 28.42 4.01 32.43 l/m0.1788 0.0252 0.204 bbl/m0.0545 0.0077 0.0622 bbl/ft

Page 32: Drilling Calculation

32. oldal

Make up torque

For bitssize in" Threads in daNm in lbft5 1/8-7 3/8 3 1/2 REG 950-1200 7000-90007 1/2-9 3/8 4 1/2 REG 1600-2200 12000-160009 1/2-14 1/2 6 5/8 REG 3800-4300 28000-3200014 5/8-18 1/2 7 5/8 REG 4600-5400 34000-40000

18 5/8< 8 5/8 REG 5400-8100 40000-60000

For DP class I. tool joint

size in" weight in lb/ft grade thread in daNm in lbft3 1/2 15.5 S-135 3 1/2 IF 1764 13010

5 19.5 S-135 4 1/2 IF 3488 25700premium tool joint

3 1/2 15.5 S-135 3 1/2 IF 1557 114805 19.5 S-135 4 1/2 IF 3030 22350

For HWDPsize in" ID in" weight in lb/ft thread in daNm in lbft

3 1/2 2 1/16 25.33 3 1/2 IF 1342 99005 3 49.32 4 1/2 IF 3985 29400

For DCsize in" ID in" thread in daNm in lbft

4 3/4 1 3/4-2 1/2 3 1/2 IF 1342 99006 1/4 5 1/4 4 IF 3796 280006 1/4 10 1/2 4 IF 3457 255006 1/2 13 5/16 4 1/2 IF 4000 295006 1/2 2 1/4-3 4 1/2 IF 4000 29500

8 2 1/2 6 5/8 REG 7730 570008 2 13/16 6 5/8 REG 7190 530008 3 6 5/8 REG 6780 500009 3 7 5/8 REG 11250 830009 3 1/4 7 5/8 REG 11250 830009 3 1/2 7 5/8 REG 10710 790009 3 3/4 7 5/8 REG 10030 74000

Triplex pump cilinder & stroke output / pump stroke 12"=304,8mm /ID in mm ID in " efficiency in l in bbl in gal

140 5 1/2 100% 14.016 0.0882 3.703140 5 1/2 95% 13.32 0.0864 3.518150 5 29/32 100% 16.159 0.102 4.269150 5 29/32 95% 15.351 0.097 4.055160 6 5/16 100% 18.385 0.1156 4.8569160 6 5/16 95% 17.466 0.10986 4.6141

Page 33: Drilling Calculation

33. oldal

170 6 11/16 100% 20.7551 0.1305 5.483170 6 11/16 95% 19.717 0.124 5.21

Page 34: Drilling Calculation

34. oldal

Conversion table from ppg to kg/l & vica versappg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l8.01 0.960 8.54 1.023 9.07 1.087 9.6 1.150 10.13 1.2148.02 0.961 8.55 1.025 9.08 1.088 9.61 1.152 10.14 1.2158.03 0.962 8.56 1.026 9.09 1.089 9.62 1.153 10.15 1.2168.04 0.963 8.57 1.027 9.1 1.090 9.63 1.154 10.16 1.2178.05 0.965 8.58 1.028 9.11 1.092 9.64 1.155 10.17 1.2198.06 0.966 8.59 1.029 9.12 1.093 9.65 1.156 10.18 1.2208.07 0.967 8.6 1.031 9.13 1.094 9.66 1.158 10.19 1.2218.08 0.968 8.61 1.032 9.14 1.095 9.67 1.159 10.2 1.2228.09 0.969 8.62 1.033 9.15 1.096 9.68 1.160 10.21 1.2238.1 0.971 8.63 1.034 9.16 1.098 9.69 1.161 10.22 1.225

8.11 0.972 8.64 1.035 9.17 1.099 9.7 1.162 10.23 1.2268.12 0.973 8.65 1.037 9.18 1.100 9.71 1.164 10.24 1.2278.13 0.974 8.66 1.038 9.19 1.101 9.72 1.165 10.25 1.2288.14 0.975 8.67 1.039 9.2 1.102 9.73 1.166 10.26 1.2298.15 0.977 8.68 1.040 9.21 1.104 9.74 1.167 10.27 1.2318.16 0.978 8.69 1.041 9.22 1.105 9.75 1.168 10.28 1.2328.17 0.979 8.7 1.043 9.23 1.106 9.76 1.170 10.29 1.2338.18 0.980 8.71 1.044 9.24 1.107 9.77 1.171 10.3 1.2348.19 0.981 8.72 1.045 9.25 1.108 9.78 1.172 10.31 1.2358.2 0.983 8.73 1.046 9.26 1.110 9.79 1.173 10.32 1.237

8.21 0.984 8.74 1.047 9.27 1.111 9.8 1.174 10.33 1.2388.22 0.985 8.75 1.049 9.28 1.112 9.81 1.176 10.34 1.2398.23 0.986 8.76 1.050 9.29 1.113 9.82 1.177 10.35 1.2408.24 0.987 8.77 1.051 9.3 1.114 9.83 1.178 10.36 1.2418.25 0.989 8.78 1.052 9.31 1.116 9.84 1.179 10.37 1.2438.26 0.990 8.79 1.053 9.32 1.117 9.85 1.180 10.38 1.2448.27 0.991 8.8 1.054 9.33 1.118 9.86 1.182 10.39 1.2458.28 0.992 8.81 1.056 9.34 1.119 9.87 1.183 10.4 1.2468.29 0.993 8.82 1.057 9.35 1.120 9.88 1.184 10.41 1.2478.3 0.995 8.83 1.058 9.36 1.122 9.89 1.185 10.42 1.249

8.31 0.996 8.84 1.059 9.37 1.123 9.9 1.186 10.43 1.2508.32 0.997 8.85 1.060 9.38 1.124 9.91 1.188 10.44 1.2518.33 0.998 8.86 1.062 9.39 1.125 9.92 1.189 10.45 1.2528.34 0.999 8.87 1.063 9.4 1.126 9.93 1.190 10.46 1.2538.35 1.001 8.88 1.064 9.41 1.128 9.94 1.191 10.47 1.2558.36 1.002 8.89 1.065 9.42 1.129 9.95 1.192 10.48 1.2568.37 1.003 8.9 1.066 9.43 1.130 9.96 1.193 10.49 1.2578.38 1.004 8.91 1.068 9.44 1.131 9.97 1.195 10.5 1.2588.39 1.005 8.92 1.069 9.45 1.132 9.98 1.196 10.51 1.2598.4 1.007 8.93 1.070 9.46 1.134 9.99 1.197 10.52 1.261

8.41 1.008 8.94 1.071 9.47 1.135 10 1.198 10.53 1.2628.42 1.009 8.95 1.072 9.48 1.136 10.01 1.199 10.54 1.2638.43 1.010 8.96 1.074 9.49 1.137 10.02 1.201 10.55 1.2648.44 1.011 8.97 1.075 9.5 1.138 10.03 1.202 10.56 1.2658.45 1.013 8.98 1.076 9.51 1.140 10.04 1.203 10.57 1.2678.46 1.014 8.99 1.077 9.52 1.141 10.05 1.204 10.58 1.2688.47 1.015 9 1.078 9.53 1.142 10.06 1.205 10.59 1.2698.48 1.016 9.01 1.080 9.54 1.143 10.07 1.207 10.6 1.2708.49 1.017 9.02 1.081 9.55 1.144 10.08 1.208 10.61 1.2718.5 1.019 9.03 1.082 9.56 1.146 10.09 1.209 10.62 1.273

8.51 1.020 9.04 1.083 9.57 1.147 10.1 1.210 10.63 1.2748.52 1.021 9.05 1.084 9.58 1.148 10.11 1.211 10.64 1.275

Page 35: Drilling Calculation

35. oldal

8.53 1.022 9.06 1.086 9.59 1.149 10.12 1.213 10.65 1.276ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l

10.66 1.277 11.21 1.343 11.76 1.409 12.31 1.475 12.86 1.54110.67 1.279 11.22 1.344 11.77 1.410 12.32 1.476 12.87 1.54210.68 1.280 11.23 1.346 11.78 1.412 12.33 1.477 12.88 1.54310.69 1.281 11.24 1.347 11.79 1.413 12.34 1.479 12.89 1.54510.7 1.282 11.25 1.348 11.8 1.414 12.35 1.480 12.9 1.546

10.71 1.283 11.26 1.349 11.81 1.415 12.36 1.481 12.91 1.54710.72 1.285 11.27 1.350 11.82 1.416 12.37 1.482 12.92 1.54810.73 1.286 11.28 1.352 11.83 1.418 12.38 1.483 12.93 1.54910.74 1.287 11.29 1.353 11.84 1.419 12.39 1.485 12.94 1.55110.75 1.288 11.3 1.354 11.85 1.420 12.4 1.486 12.95 1.55210.76 1.289 11.31 1.355 11.86 1.421 12.41 1.487 12.96 1.55310.77 1.291 11.32 1.356 11.87 1.422 12.42 1.488 12.97 1.55410.78 1.292 11.33 1.358 11.88 1.424 12.43 1.489 12.98 1.55510.79 1.293 11.34 1.359 11.89 1.425 12.44 1.491 12.99 1.55710.8 1.294 11.35 1.360 11.9 1.426 12.45 1.492 13 1.558

10.81 1.295 11.36 1.361 11.91 1.427 12.46 1.493 13.01 1.55910.82 1.297 11.37 1.362 11.92 1.428 12.47 1.494 13.02 1.56010.83 1.298 11.38 1.364 11.93 1.430 12.48 1.495 13.03 1.56110.84 1.299 11.39 1.365 11.94 1.431 12.49 1.497 13.04 1.56310.85 1.300 11.4 1.366 11.95 1.432 12.5 1.498 13.05 1.56410.86 1.301 11.41 1.367 11.96 1.433 12.51 1.499 13.06 1.56510.87 1.303 11.42 1.368 11.97 1.434 12.52 1.500 13.07 1.56610.88 1.304 11.43 1.370 11.98 1.436 12.53 1.501 13.08 1.56710.89 1.305 11.44 1.371 11.99 1.437 12.54 1.503 13.09 1.56910.9 1.306 11.45 1.372 12 1.438 12.55 1.504 13.1 1.570

10.91 1.307 11.46 1.373 12.01 1.439 12.56 1.505 13.11 1.57110.92 1.309 11.47 1.374 12.02 1.440 12.57 1.506 13.12 1.57210.93 1.310 11.48 1.376 12.03 1.442 12.58 1.507 13.13 1.57310.94 1.311 11.49 1.377 12.04 1.443 12.59 1.509 13.14 1.57510.95 1.312 11.5 1.378 12.05 1.444 12.6 1.510 13.15 1.57610.96 1.313 11.51 1.379 12.06 1.445 12.61 1.511 13.16 1.57710.97 1.315 11.52 1.380 12.07 1.446 12.62 1.512 13.17 1.57810.98 1.316 11.53 1.382 12.08 1.448 12.63 1.513 13.18 1.57910.99 1.317 11.54 1.383 12.09 1.449 12.64 1.515 13.19 1.581

11 1.318 11.55 1.384 12.1 1.450 12.65 1.516 13.2 1.58211.01 1.319 11.56 1.385 12.11 1.451 12.66 1.517 13.21 1.58311.02 1.321 11.57 1.386 12.12 1.452 12.67 1.518 13.22 1.58411.03 1.322 11.58 1.388 12.13 1.454 12.68 1.519 13.23 1.58511.04 1.323 11.59 1.389 12.14 1.455 12.69 1.521 13.24 1.58711.05 1.324 11.6 1.390 12.15 1.456 12.7 1.522 13.25 1.58811.06 1.325 11.61 1.391 12.16 1.457 12.71 1.523 13.26 1.58911.07 1.327 11.62 1.392 12.17 1.458 12.72 1.524 13.27 1.59011.08 1.328 11.63 1.394 12.18 1.460 12.73 1.525 13.28 1.59111.09 1.329 11.64 1.395 12.19 1.461 12.74 1.527 13.29 1.59311.1 1.330 11.65 1.396 12.2 1.462 12.75 1.528 13.3 1.594

11.11 1.331 11.66 1.397 12.21 1.463 12.76 1.529 13.31 1.59511.12 1.332 11.67 1.398 12.22 1.464 12.77 1.530 13.32 1.59611.13 1.334 11.68 1.400 12.23 1.466 12.78 1.531 13.33 1.59711.14 1.335 11.69 1.401 12.24 1.467 12.79 1.533 13.34 1.59911.15 1.336 11.7 1.402 12.25 1.468 12.8 1.534 13.35 1.60011.16 1.337 11.71 1.403 12.26 1.469 12.81 1.535 13.36 1.60111.17 1.338 11.72 1.404 12.27 1.470 12.82 1.536 13.37 1.602

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36. oldal

11.18 1.340 11.73 1.406 12.28 1.472 12.83 1.537 13.38 1.60311.19 1.341 11.74 1.407 12.29 1.473 12.84 1.539 13.39 1.60511.2 1.342 11.75 1.408 12.3 1.474 12.85 1.540 13.4 1.606ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l

13.41 1.607 13.96 1.673 14.51 1.739 15.06 1.805 15.61 1.87113.42 1.608 13.97 1.674 14.52 1.740 15.07 1.806 15.62 1.87213.43 1.609 13.98 1.675 14.53 1.741 15.08 1.807 15.63 1.87313.44 1.611 13.99 1.676 14.54 1.742 15.09 1.808 15.64 1.87413.45 1.612 14 1.678 14.55 1.744 15.1 1.809 15.65 1.87513.46 1.613 14.01 1.679 14.56 1.745 15.11 1.811 15.66 1.87713.47 1.614 14.02 1.680 14.57 1.746 15.12 1.812 15.67 1.87813.48 1.615 14.03 1.681 14.58 1.747 15.13 1.813 15.68 1.87913.49 1.616 14.04 1.682 14.59 1.748 15.14 1.814 15.69 1.88013.5 1.618 14.05 1.684 14.6 1.750 15.15 1.815 15.7 1.881

13.51 1.619 14.06 1.685 14.61 1.751 15.16 1.817 15.71 1.88313.52 1.620 14.07 1.686 14.62 1.752 15.17 1.818 15.72 1.88413.53 1.621 14.08 1.687 14.63 1.753 15.18 1.819 15.73 1.88513.54 1.622 14.09 1.688 14.64 1.754 15.19 1.820 15.74 1.88613.55 1.624 14.1 1.690 14.65 1.755 15.2 1.821 15.75 1.88713.56 1.625 14.11 1.691 14.66 1.757 15.21 1.823 15.76 1.88913.57 1.626 14.12 1.692 14.67 1.758 15.22 1.824 15.77 1.89013.58 1.627 14.13 1.693 14.68 1.759 15.23 1.825 15.78 1.89113.59 1.628 14.14 1.694 14.69 1.760 15.24 1.826 15.79 1.89213.6 1.630 14.15 1.696 14.7 1.761 15.25 1.827 15.8 1.893

13.61 1.631 14.16 1.697 14.71 1.763 15.26 1.829 15.81 1.89413.62 1.632 14.17 1.698 14.72 1.764 15.27 1.830 15.82 1.89613.63 1.633 14.18 1.699 14.73 1.765 15.28 1.831 15.83 1.89713.64 1.634 14.19 1.700 14.74 1.766 15.29 1.832 15.84 1.89813.65 1.636 14.2 1.702 14.75 1.767 15.3 1.833 15.85 1.89913.66 1.637 14.21 1.703 14.76 1.769 15.31 1.835 15.86 1.90013.67 1.638 14.22 1.704 14.77 1.770 15.32 1.836 15.87 1.90213.68 1.639 14.23 1.705 14.78 1.771 15.33 1.837 15.88 1.90313.69 1.640 14.24 1.706 14.79 1.772 15.34 1.838 15.89 1.90413.7 1.642 14.25 1.708 14.8 1.773 15.35 1.839 15.9 1.905

13.71 1.643 14.26 1.709 14.81 1.775 15.36 1.841 15.91 1.90613.72 1.644 14.27 1.710 14.82 1.776 15.37 1.842 15.92 1.90813.73 1.645 14.28 1.711 14.83 1.777 15.38 1.843 15.93 1.90913.74 1.646 14.29 1.712 14.84 1.778 15.39 1.844 15.94 1.91013.75 1.648 14.3 1.714 14.85 1.779 15.4 1.845 15.95 1.91113.76 1.649 14.31 1.715 14.86 1.781 15.41 1.847 15.96 1.91213.77 1.650 14.32 1.716 14.87 1.782 15.42 1.848 15.97 1.91413.78 1.651 14.33 1.717 14.88 1.783 15.43 1.849 15.98 1.91513.79 1.652 14.34 1.718 14.89 1.784 15.44 1.850 15.99 1.91613.8 1.654 14.35 1.720 14.9 1.785 15.45 1.851 16 1.917

13.81 1.655 14.36 1.721 14.91 1.787 15.46 1.853 16.01 1.91813.82 1.656 14.37 1.722 14.92 1.788 15.47 1.854 16.02 1.92013.83 1.657 14.38 1.723 14.93 1.789 15.48 1.855 16.03 1.92113.84 1.658 14.39 1.724 14.94 1.790 15.49 1.856 16.04 1.92213.85 1.660 14.4 1.726 14.95 1.791 15.5 1.857 16.05 1.92313.86 1.661 14.41 1.727 14.96 1.793 15.51 1.859 16.06 1.92413.87 1.662 14.42 1.728 14.97 1.794 15.52 1.860 16.07 1.92613.88 1.663 14.43 1.729 14.98 1.795 15.53 1.861 16.08 1.92713.89 1.664 14.44 1.730 14.99 1.796 15.54 1.862 16.09 1.92813.9 1.666 14.45 1.732 15 1.797 15.55 1.863 16.1 1.929

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37. oldal

13.91 1.667 14.46 1.733 15.01 1.799 15.56 1.865 16.11 1.93013.92 1.668 14.47 1.734 15.02 1.800 15.57 1.866 16.12 1.93213.93 1.669 14.48 1.735 15.03 1.801 15.58 1.867 16.13 1.93313.94 1.670 14.49 1.736 15.04 1.802 15.59 1.868 16.14 1.93413.95 1.672 14.5 1.738 15.05 1.803 15.6 1.869 16.15 1.935ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l

16.16 1.936 16.71 2.002 17.26 2.068 17.81 2.134 18.36 2.20016.17 1.938 16.72 2.004 17.27 2.069 17.82 2.135 18.37 2.20116.18 1.939 16.73 2.005 17.28 2.071 17.83 2.137 18.38 2.20216.19 1.940 16.74 2.006 17.29 2.072 17.84 2.138 18.39 2.20416.2 1.941 16.75 2.007 17.3 2.073 17.85 2.139 18.4 2.205

16.21 1.942 16.76 2.008 17.31 2.074 17.86 2.140 18.41 2.20616.22 1.944 16.77 2.010 17.32 2.075 17.87 2.141 18.42 2.20716.23 1.945 16.78 2.011 17.33 2.077 17.88 2.143 18.43 2.20816.24 1.946 16.79 2.012 17.34 2.078 17.89 2.144 18.44 2.21016.25 1.947 16.8 2.013 17.35 2.079 17.9 2.145 18.45 2.21116.26 1.948 16.81 2.014 17.36 2.080 17.91 2.146 18.46 2.21216.27 1.950 16.82 2.016 17.37 2.081 17.92 2.147 18.47 2.21316.28 1.951 16.83 2.017 17.38 2.083 17.93 2.149 18.48 2.21416.29 1.952 16.84 2.018 17.39 2.084 17.94 2.150 18.49 2.21616.3 1.953 16.85 2.019 17.4 2.085 17.95 2.151 18.5 2.217

16.31 1.954 16.86 2.020 17.41 2.086 17.96 2.152 18.51 2.21816.32 1.956 16.87 2.022 17.42 2.087 17.97 2.153 18.52 2.21916.33 1.957 16.88 2.023 17.43 2.089 17.98 2.155 18.53 2.22016.34 1.958 16.89 2.024 17.44 2.090 17.99 2.156 18.54 2.22216.35 1.959 16.9 2.025 17.45 2.091 18 2.157 18.55 2.22316.36 1.960 16.91 2.026 17.46 2.092 18.01 2.158 18.56 2.22416.37 1.962 16.92 2.028 17.47 2.093 18.02 2.159 18.57 2.22516.38 1.963 16.93 2.029 17.48 2.095 18.03 2.161 18.58 2.22616.39 1.964 16.94 2.030 17.49 2.096 18.04 2.162 18.59 2.22816.4 1.965 16.95 2.031 17.5 2.097 18.05 2.163 18.6 2.229

16.41 1.966 16.96 2.032 17.51 2.098 18.06 2.164 18.61 2.23016.42 1.968 16.97 2.033 17.52 2.099 18.07 2.165 18.62 2.23116.43 1.969 16.98 2.035 17.53 2.101 18.08 2.167 18.63 2.23216.44 1.970 16.99 2.036 17.54 2.102 18.09 2.168 18.64 2.23416.45 1.971 17 2.037 17.55 2.103 18.1 2.169 18.65 2.23516.46 1.972 17.01 2.038 17.56 2.104 18.11 2.170 18.66 2.23616.47 1.974 17.02 2.039 17.57 2.105 18.12 2.171 18.67 2.23716.48 1.975 17.03 2.041 17.58 2.107 18.13 2.172 18.68 2.23816.49 1.976 17.04 2.042 17.59 2.108 18.14 2.174 18.69 2.24016.5 1.977 17.05 2.043 17.6 2.109 18.15 2.175 18.7 2.241

16.51 1.978 17.06 2.044 17.61 2.110 18.16 2.176 18.71 2.24216.52 1.980 17.07 2.045 17.62 2.111 18.17 2.177 18.72 2.24316.53 1.981 17.08 2.047 17.63 2.113 18.18 2.178 18.73 2.24416.54 1.982 17.09 2.048 17.64 2.114 18.19 2.180 18.74 2.24616.55 1.983 17.1 2.049 17.65 2.115 18.2 2.181 18.75 2.24716.56 1.984 17.11 2.050 17.66 2.116 18.21 2.182 18.76 2.24816.57 1.986 17.12 2.051 17.67 2.117 18.22 2.183 18.77 2.24916.58 1.987 17.13 2.053 17.68 2.119 18.23 2.184 18.78 2.25016.59 1.988 17.14 2.054 17.69 2.120 18.24 2.186 18.79 2.25216.6 1.989 17.15 2.055 17.7 2.121 18.25 2.187 18.8 2.253

16.61 1.990 17.16 2.056 17.71 2.122 18.26 2.188 18.81 2.25416.62 1.992 17.17 2.057 17.72 2.123 18.27 2.189 18.82 2.25516.63 1.993 17.18 2.059 17.73 2.125 18.28 2.190 18.83 2.256

Page 38: Drilling Calculation

38. oldal

16.64 1.994 17.19 2.060 17.74 2.126 18.29 2.192 18.84 2.25816.65 1.995 17.2 2.061 17.75 2.127 18.3 2.193 18.85 2.25916.66 1.996 17.21 2.062 17.76 2.128 18.31 2.194 18.86 2.26016.67 1.998 17.22 2.063 17.77 2.129 18.32 2.195 18.87 2.26116.68 1.999 17.23 2.065 17.78 2.131 18.33 2.196 18.88 2.26216.69 2.000 17.24 2.066 17.79 2.132 18.34 2.198 18.89 2.26416.7 2.001 17.25 2.067 17.8 2.133 18.35 2.199 18.9 2.265ppg kg/l ppg kg/l ppg kg/l ppg kg/l ppg kg/l

18.91 2.266 19.46 2.332 20.01 2.398 20.56 2.464 21.11 2.53018.92 2.267 19.47 2.333 20.02 2.399 20.57 2.465 21.12 2.53118.93 2.268 19.48 2.334 20.03 2.400 20.58 2.466 21.13 2.53218.94 2.270 19.49 2.335 20.04 2.401 20.59 2.467 21.14 2.53318.95 2.271 19.5 2.337 20.05 2.403 20.6 2.468 21.15 2.53418.96 2.272 19.51 2.338 20.06 2.404 20.61 2.470 21.16 2.53618.97 2.273 19.52 2.339 20.07 2.405 20.62 2.471 21.17 2.53718.98 2.274 19.53 2.340 20.08 2.406 20.63 2.472 21.18 2.53818.99 2.276 19.54 2.341 20.09 2.407 20.64 2.473 21.19 2.539

19 2.277 19.55 2.343 20.1 2.409 20.65 2.474 21.2 2.54019.01 2.278 19.56 2.344 20.11 2.410 20.66 2.476 21.21 2.54219.02 2.279 19.57 2.345 20.12 2.411 20.67 2.477 21.22 2.54319.03 2.280 19.58 2.346 20.13 2.412 20.68 2.478 21.23 2.54419.04 2.282 19.59 2.347 20.14 2.413 20.69 2.479 21.24 2.54519.05 2.283 19.6 2.349 20.15 2.415 20.7 2.480 21.25 2.54619.06 2.284 19.61 2.350 20.16 2.416 20.71 2.482 21.26 2.54819.07 2.285 19.62 2.351 20.17 2.417 20.72 2.483 21.27 2.54919.08 2.286 19.63 2.352 20.18 2.418 20.73 2.484 21.28 2.55019.09 2.288 19.64 2.353 20.19 2.419 20.74 2.485 21.29 2.55119.1 2.289 19.65 2.355 20.2 2.421 20.75 2.486 21.3 2.552

19.11 2.290 19.66 2.356 20.21 2.422 20.76 2.488 21.31 2.55419.12 2.291 19.67 2.357 20.22 2.423 20.77 2.489 21.32 2.55519.13 2.292 19.68 2.358 20.23 2.424 20.78 2.490 21.33 2.55619.14 2.294 19.69 2.359 20.24 2.425 20.79 2.491 21.34 2.55719.15 2.295 19.7 2.361 20.25 2.427 20.8 2.492 21.35 2.55819.16 2.296 19.71 2.362 20.26 2.428 20.81 2.494 21.36 2.56019.17 2.297 19.72 2.363 20.27 2.429 20.82 2.495 21.37 2.56119.18 2.298 19.73 2.364 20.28 2.430 20.83 2.496 21.38 2.56219.19 2.300 19.74 2.365 20.29 2.431 20.84 2.497 21.39 2.56319.2 2.301 19.75 2.367 20.3 2.433 20.85 2.498 21.4 2.564

19.21 2.302 19.76 2.368 20.31 2.434 20.86 2.500 21.41 2.56619.22 2.303 19.77 2.369 20.32 2.435 20.87 2.501 21.42 2.56719.23 2.304 19.78 2.370 20.33 2.436 20.88 2.502 21.43 2.56819.24 2.306 19.79 2.371 20.34 2.437 20.89 2.503 21.44 2.56919.25 2.307 19.8 2.373 20.35 2.439 20.9 2.504 21.45 2.57019.26 2.308 19.81 2.374 20.36 2.440 20.91 2.506 21.46 2.57219.27 2.309 19.82 2.375 20.37 2.441 20.92 2.507 21.47 2.57319.28 2.310 19.83 2.376 20.38 2.442 20.93 2.508 21.48 2.57419.29 2.312 19.84 2.377 20.39 2.443 20.94 2.509 21.49 2.57519.3 2.313 19.85 2.379 20.4 2.445 20.95 2.510 21.5 2.576

19.31 2.314 19.86 2.380 20.41 2.446 20.96 2.512 21.51 2.57819.32 2.315 19.87 2.381 20.42 2.447 20.97 2.513 21.52 2.57919.33 2.316 19.88 2.382 20.43 2.448 20.98 2.514 21.53 2.58019.34 2.317 19.89 2.383 20.44 2.449 20.99 2.515 21.54 2.58119.35 2.319 19.9 2.385 20.45 2.451 21 2.516 21.55 2.58219.36 2.320 19.91 2.386 20.46 2.452 21.01 2.518 21.56 2.584

Page 39: Drilling Calculation

39. oldal

19.37 2.321 19.92 2.387 20.47 2.453 21.02 2.519 21.57 2.58519.38 2.322 19.93 2.388 20.48 2.454 21.03 2.520 21.58 2.58619.39 2.323 19.94 2.389 20.49 2.455 21.04 2.521 21.59 2.58719.4 2.325 19.95 2.391 20.5 2.456 21.05 2.522 21.6 2.588

19.41 2.326 19.96 2.392 20.51 2.458 21.06 2.524 21.61 2.59019.42 2.327 19.97 2.393 20.52 2.459 21.07 2.525 21.62 2.59119.43 2.328 19.98 2.394 20.53 2.460 21.08 2.526 21.63 2.59219.44 2.329 19.99 2.395 20.54 2.461 21.09 2.527 21.64 2.59319.45 2.331 20 2.397 20.55 2.462 21.1 2.528 21.65 2.594

Page 40: Drilling Calculation

Trip calculationsWritten by Gabor Nemeth

Data Metric Unit Field Unit

0.00428 l/m 0.008205 bbl/ftPcap-Pipe capacity 0.00897 l/m 0.017195 bbl/ft

0.01325 l/m 0.0254 bbl/ft28.7 m 94.16 ft

0.02367 l/m 0.045375 bbl/ftOMW-Original mud weight 1490 12.43 ppg

SMW-Slug mud weight 1680 14.02 ppg

8 50.32 bbl113.73 m 373.17 ft

1. Fluid level drop (FLD) :

a; In dry POOHFLD= (Pipe displ. x length of stand)/(csg-pipe annular cap.+pipe cap.)

3.76 m/std 12.35 ft/std b; In wet POOHFLD= (Pipe total displ. x length of stand)/(csg-pipe ann. cap.+pipe total cap)

10.30 m/std 33.79 ft/std

a; In dry POOHOMW x g x FLD 55 kPa/std 7.98 psi/std

b; In wet POOHOMW x g x FLD 151 kPa/std 21.85 psi/std

3. Slug :

113.73 m 373.17 ft

1680.00 14.02 ppg

[email protected]

Pmd-Pipe metal displacement

Pt-Pipe total displacementLstd- Average length of standPac-Csg-pipe annular capacity

kg/m3

kg/m3

Vs-Volume of slug m3

Lsc-a certain level of mud in the pipe

Fill in ONLY the section above with data and the program will calculate by itself !!!

2. Hydrostatic pressure loss (Ploss) :

Ploss=

Ploss=

a; Level of mud in the pipe after slug (Ls) :

Ls= ((SMW-OMW) x (Vs/Pcap))/OMW

b; Slug mud weight based on a certain level of mud in the pipe (SMW1) :

SMW1= OMW+((Lsc x OMW)/(Vs/Pcap)) kg/m3

Page 41: Drilling Calculation
Page 42: Drilling Calculation

Miscellaneous calculationsWritten by Gabor Nemeth

Data Metric Unit Field Unit

TVD-True vertical depth 3600 m 11811 ft

OMW-Original mud weight 1400 11.68 ppg

d-specific gravity 1.4 kg/l 1.4 kg/l9 5/8 in 9 5/8 in

5 in 5 in3600 m 11811 ft

60 cp 60 cp30 cp 30 cp

8 8SPM-stroke per minute 60 str/min 60 str/minL-length of stroke 12 in 12 inD-liner diameter 6 11/16 in 6 11/16 in

2 in 2 in1242.93 l/min 328.36 gpm

25.03 l/m 0.04798 bbl/ft

a; Duplex pump:1584.16 l/min

0,000162 x SPM x L x ((2 x D^2)-dp^2) (field) 418.59 gpm

b; Single-acting Triplex pump:1242.93 l/min

328.64 gpm

78% 78%100% 100%

62.18 m/min204.02 ft/min

V-Fluid velocity 49.66 m/min 162.94 ft/min

Type of flow : laminar laminar

If V<Vc, the flow is laminar; if V>Vc, the flow is turbulent !

4. Annular Pressure Loss (APL) :

697 kPaTurbulent flow: 395 kPa

120.79 psi

5. Equivalent circulating density (ECD) :

ECD=(metric.) OMW+((APL x 1000)/(9,81xTVD)) (metric) 1411

ECD=(field.) OMW+(APL/(0,052*TVD)) (field.) 11.88 ppg

6. Trip margin (TM) :

[email protected]

kg/m3

Do-Annulus outside diameter Di-Annulus inside diameter/outside string/ Lp-length of stringm-Dynamic viscositymp-plastic viscosity to-Yield value lb/100ft2 lb/100ft2

dp-piston rod diameterQr-True measured flow ratevas-Annular capacity

Fill in ONLY the section above with data and the program will calculate by itself !!!

1. Theoretical flow rate (Qt) :

Qt=(metric.) 0,0515 x SPM x L x (D^2-dp^2/2) (metric)Qt=(field.)

Qt=(metric.) Qt= 0,0386 x SPM x L x D^2 (metric)Qt=(field.) Qt=0,000243 x SPM x D^2 x L (field)

2. Volumetric efficiency (hv) :

hv=(duplex pump) hv=Qr/Qt (duplex pump)

hv=(triplex pump) hv=Qr/Qt (triplex pump)

3. Critical fluid velocity in the annulus (Vc) :

Vc=(metric.) (3,04/((Do-Di)xd))x(mp+(root2 mp^2+40,05xto x (Do-Di)^2 x d)) (metric)

Vc=(field.) (9,974/((Do-Di)xd))x(mp+(root2 mp^2+40,05xto x (Do-Di)^2 x d)) (field)

Laminar flow: APL=(QAPL=((Qr*Lp*mp)/(408,63*(Do+Di)*(Do-Di)^3))+((to*Lp)/(13,26*(Do-Di)))

APL=(Lp*d^0,8*Qr^1,8*mp^0,2)/(706,96*(Do+Di)^1,8*(Do-Di)^3)

APL=(field.) ((Lp*to)/225*(Do-Di))+(((Lp*mp*(V/60))/1500*(Do-Di)^2)

kg/m3

Page 43: Drilling Calculation

17.72

TM=(field.) 0.15 ppg

TM=(metr.) to x 10,2418/(Do-Di)(metr.) kg/m3

to/(11,7x(Do-Di)) (field.)

Page 44: Drilling Calculation

Written by Gabor Nemeth

Fill

in O

NL

Y t

his

se

cti

on

wit

h d

ata

L1=the deepest depth of the operation in meter 3600 mL2=the beginning of the operation in meter 3580 ml =length of a stand in meter 28.6 m

260 m100 m

0 mReal weight of bit, stabilizer, drilling jar, pony DC, etc. in kg 1300 kgDC 1 real weight in kg/m 242 kg/mDC 2 real weight in kg/m 214.8 kg/mHWDP real weight in kg/m 73.4 kg/mDP 1 real weight (or tbg., or csg.) in kg/m 29.02 kg/m

1900 mDP 2 real weight (or tbg., or csg.) in kg/m 23.1 kg/m

1320 mMud density in kg/l 1.49 kg/lP=total weight of travelling block-elevator assembly in kg 8000 kgp=weight of DP with tool joints(accounting for buoyancy) in kg/m 21.53 kg/md=additional weight due to BHA(DC,HWDP,bit etc.)(accounting for buoyancy) kg 69433 kgBUOYANCY FACTOR k=1-(Mud density/Steel density) 0.810

DC 1 apparent weight = DC 1 real weight-Buoyancy DC 1 196.07 kg/mDC 2 apparent weight = DC 2 real weight-Buoyancy DC 2 174.03 kg/mHWDP apparent weight = HWDP real weight-Buoyancy HWDP 59.47 kg/mDP 1 apparent weight = DP 1 real weight-Buoyancy DP 1 23.51 kg/mDP 2 apparent weight = DP 2 real weight-Buoyancy DP 2 18.69 kg/mBit, stabilizer, drilling jar, pony DC, etc. apparent weight 1053.25 kgBuoyancy DC 1 = (DC 1 real weight*Mud density)/Steel density 45.93 kg/mBuoyancy DC 2 = (DC 2 real weight*Mud density)/Steel density 40.77 kg/mBuoyancy HWDP= HWDP real weight*Mud density/Steel density 13.93 kg/mBuoyancy DP 1 = (DP 1 real weight*Mud density)/Steel density 5.51 kg/mBuoyancy DP 2 = (DP 2 real weight*Mud density)/Steel density 4.38 kg/m

H E N C E :Apparent weight = Real weight x ((Steel density - Mud density) / Steel density)

Type of operation: pooh Tm=(0,981*(p*L*(L+l)+4*L897 890

1. Round trip tons km

2. POOH 448 tons km

3. RIH tons km

4. Short trip tons km

5. Drilling 1 tons km

6. Drilling 2 tons km

7. Reaming tons km

8. Coring tons km

9. Running casing tons km

N O T E :S t e e l d e n s i t y : 7.85

WORK DONE BY A DRILLING LINE /metric units/[email protected]

LDC 1=length of DC 1 in meterLDC 2=length of DC 2 in meterLHWDP=length of HWDP in meter

LDP 1=length of DP 1 in meter

LDP 2=length of DP 2 in meter

Tm1 Tm2

kg/dm3

D36
Write the type of operation into this cell, from the follows: -Round trip -POOH -RIH -Short trip -Drilling 1 /to depth L1 / -Drilling 2 /from depth L2 to depth L1/ -Reaming -Coring -Running casing /take the note into consideration/; and the program will caculate by itself
B55
In this case: l = average length of csg /m/ p = average weight of csg /kg/m/(accounting for buoyance) d ="0"
Page 45: Drilling Calculation

Fill

in O

NL

Y t

his

se

cti

on

wit

h d

ata

11811 ft11745 ft

L =length of a stand in feet 93.83 ft853 ft328 ft

0 ftReal weight of bit, stabilizer, drilling jar, pony DC, etc. in lbs 2866 lbsLength of bit, stabilizer, drilling jar, pony DC, etc. in feet 10 ftDC 1 real weight in lb/ft 162.89 lb/ftDC 2 real weight in lb/ft 144.34 lb/ftHWDP real weight in lb/ft 49.32 lb/ftDP 1 real weight (or tbg., or csg.) in lb/ft 19.5 lb/ft

6234 ftDP 2 real weight (or tbg., or csg.) in lb/ft 15.5 lb/ft

4320 ftMud density in ppg 12.43 ppgM=total weight of travelling block-elevator assembly in lbs 17637 lbsW = Bouyed weight of drill pipe in lb/ft 14.47 lb/ft

156935 lbsBUOYANCY FACTOR k=1-(Mud density/Steel density) 0.810

DC 1 apparent weight = DC 1 real weight-Buoyancy DC 1 131.98 lb/ftDC 2 apparent weight = DC 2 real weight-Buoyancy DC 2 116.95 lb/ftHWDP apparent weight = HWDP real weight-Buoyancy HWDP 39.96 lb/ftDP 1 apparent weight = DP 1 real weight-Buoyancy DP 1 15.80 lb/ftDP 2 apparent weight = DP 2 real weight-Buoyancy DP 2 12.56 lb/ftBit, stabilizer, drilling jar, pony DC, etc. apparent weight 2322.20 lbsBuoyancy DC 1 = (DC 1 real weight*Mud density)/Steel density 30.91 lb/ftBuoyancy DC 2 = (DC 2 real weight*Mud density)/Steel density 27.39 lb/ftBuoyancy HWDP= HWDP real weight*Mud density/Steel density 9.36 lb/ftBuoyancy DP 1 = (DP 1 real weight*Mud density)/Steel density 3.70 lb/ftBuoyancy DP 2 = (DP 2 real weight*Mud density)/Steel density 2.94 lb/ft

H E N C E :Apparent weight = Real weight x ((Steel density - Mud density) / Steel density)

Type of operation: pooh TM=((D*(L+D)*W/1056000623 618

1. Round trip tonmiles

2. POOH 311 tonmiles

3. RIH tonmiles

4. Short trip tonmiles

5. Drilling 1 tonmiles

6. Drilling 2 tonmiles

7. Reaming tonmiles

8. Coring tonmiles

9. Running casing tonmiles

N O T E :

S t e e l d e n s i t y : 65.51 ppg

WORK DONE BY A DRILLING LINE /field units/D1=the deepest depth of the operation in feetD2=the beginning of the operation in feet

LDC 1=length of DC in feetLDC 2=length of DC in feetLHWDP=length of HWDP in feet

LDP 1=length of DP 1 in feet

LDP 2=length of DP 2 in feet

C = Bouyed weight of BHA minus bouyed weight of equal length DP in lbs

Tm1 Tm2

D94
Write the type of operation into this cell, from the follows: -Round trip -POOH -RIH -Short trip -Drilling 1 /to depth L1 / -Drilling 2 /from depth L2 to depth L1/ -Reaming -Coring -Running casing /take the note into consideration/; and the program will caculate by itself
B113
In this case: L = average length of csg /ft/ W = average weight of csg /lb/ft/(accounting for buoyance) C ="0"
Page 46: Drilling Calculation

PROCEDURE FOR SLIP & CUT DRILLING LINE PROGRAMME

INTRODUCTION

This procedure has issued as a guidline for slip and cut drilling line programme

RIG BASIC DATA

Mast Drilling Line Drawworks Drum

Capacity Height tons Type Breaking load Type Cap. Type OD "

14 mlbs 142 ft 500

in tons14 Plain Grooved 30

75.7

1.09 3.34173CUT OFF LENGTH IN NUMBER OF DRUM LAPS FOR DRILLING LINE ( as per API RP 9B )

X laps + 1/2 lap for counterbalanced grooved drum = 11 1/2 laps

Conversion of laps to length is

90.32 ft 27.53 m

Fast line tension = Hook load/(Number of line x Reeving efficiency) 64.22 tons

Safety factor ( S.F. ) is equal S.F. = Breaking load / Fast line tension 1.18

Ton- Miles per foot cut when operating at safety factor 5 is 20, for full cut - off length

20 * 90,32' = 1806 ton-miles

This is a good drilling practice to slip three times between cut - off.

THE GOOD PROCEDURE IS

Hook load No. of

line

Type of

bear- rings

1 3/8 6 x 19 IPS, IWRC

Midco U914

1400 HP

p * OD/12 * No.of drum laps

ta= F/(N x hm)

Reeving efficiency (hm)=(Friction factor/depending on type of bearrings/ to the number of line th power) - 1

Number of line x (Friction factor -1) x (Friction factor to the number of line th power)

Slip drilling line 9 m after every 602 ton - miles / 862 Tkm /

Cut - off drilling line 27 m after every 1806 ton - miles / 2586 Tkm /

K15
Write here: either -Plain or -Roller depending on the type of bearrings
I21
Read the data from the Drilling Data Handbook page 271 chart
Page 47: Drilling Calculation

Rig No. Drilling line work report Units : Tons, meters, Tkm

FILL ONLY THE WHITE COLUMNS

DATE RIG ACTOIN FROM TO

10/02/00 Drilling 0 50 8 8 8 8 1100 111/02/00 Round trip 50 0 8 16 16 16 1100

15 31 31 31 110060 91 91 91 110055 146 146 146 1100

450 0 596 596 slip 9 1100310 310 906 906 1100

9 0 0 915 cut 27 107318 18 18 933 107356 74 74 989 1073

156 230 230 1145 1073230 460 460 1375 1073

18 478 478 1393 107327 0 505 1420 slip 9 1073

400 400 905 1820 1073200 0 1105 2020 slip 9 1073

8 8 1113 2028 107312 20 1125 2040 1073

9 29 1134 2049 107365 94 1199 2114 107356 150 1255 2170 107398 248 1353 2268 107379 327 1432 2347 1073

222 0 0 2569 cut 27 1046200 200 200 2769 1046

26 226 226 2795 104664 290 290 2859 104679 369 369 2938 1046

120 489 489 3058 1046300 0 789 3358 slip 9 1046

8 8 797 3366 10468 16 805 3374 1046

16 32 821 3390 104669 101 890 3459 1046

150 251 1040 3609 10468 259 1048 3617 1046

45 304 1093 3662 104612 316 1105 3674 1046

200 0 1305 3874 slip 9 104616 16 1321 3890 1046

150 166 1471 4040 104635 201 1506 4075 104680 281 1586 4155 104645 326 1631 4200 1046

150 0 0 4350 cut 27 10198 8 8 4358 1019

16 24 24 4374 1019

TKM ACT.

FROM SLIP

FROM CUT

TKM CUMMUL.

CUT, SLIP

C O. S LENGT

H

PRESENT LENGTH

BHA NUMBER

Page 48: Drilling Calculation

16 40 40 4390 101930 70 70 4420 101915 85 85 4435 101950 135 135 4485 1019

8 143 143 4493 1019

Page 49: Drilling Calculation

Determination of the length of free pipe in a stuck stringWritten by Gabor Nemeth

Data Metric Unit Field Unit25.05 kg/m 16.83 lb/ft31.83 kg/m 21.39 lb/ft

HWDP real weight 73.4 kg/m 49.32 lb/ft149.8 kg/m 100.66 lb/ft123.9 kg/m 83.26 lb/ft1000 m 3281 ft1500 m 4921 ft

HWDP length 300 m 984 ft150 m 492 ft100 m 328 ft

Mud density 1.4 kg/l 11.68 ppg141.2 317430 lbs

Distance between the two datum lines / l / 300 mm 11 4/5 inches

Procedures

1. Calculate the maximum pull on drill pipe.2. Calculate the weight of the drill string in mud.3. Calculate the allowable pull margin.

should be approximately the weight of drill string in mud + 30 % of the pull margin. Draw a mark at the kelly-bushing level. Pull on approximately 2-6 tons / 4400-13200 lbs/ more than before and return to the previous weight. Draw a second mark at the kelly- bushing level. This second mark should be distinct from the first caused by friction of drill pipe in the hole. Draw a datum line midway between these two marks.

drill string in mud + 65 % of the pull margin. Draw a mark at the kelly-bushing level.

the previous weight. Draw a second mark as before and draw a datum line midway between these two marks.6. Measure the distance / l / in mm or inches between the two datum lines.7. Calculate the length of free pipe.

Calculation of max. pull on drill pipe 130 tons 285687 lbs

Calculation of weight of drill string in mud 107 tons 234880 lbs

Calculation of the allowable pull margin 23 tons 50807 lbs

113 tons 250122 lbs

122 tons 267905 lbs

Calculation of the length of free pipe 2538 m 8337 ft

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DP1 real weight /including tool joint/DP2 real weight /including tool joint/

DC1 real weightDC2 real weightDP1 lengthDP2 length

DC1 lengthDC2 length

DP1 tensile yield strength 103daN

Fill in ONLY the section above with data and the program will calculate by itself !!!

4. Pull on the drill string until the weight indicator shows a pull T1 of some tons. This

5. Proceed as above by applying T2 pull on. This should be approximately the weight of

Pull on again approximately 2-6 tons / 4400-13200 lbs /more than before, and return to

Calculation of T1 pull

Calculation of T2 pull

DC

2D

C1

HW

DP

DP

1D

P2

Bit

A16
Read it on the rigfloor & write into the cell close by.
Page 50: Drilling Calculation
Page 51: Drilling Calculation

Back-offWritten by Gabor Nemeth

Data Metric Unit Field Unit25.05 kg/m 16.83 lb/ft31.83 kg/m 21.39 lb/ft

HWDP real weight 73.4 kg/m 49.32 lb/ft149.8 kg/m 100.66 lb/ft123.9 kg/m 83.26 lb/ft

Weight of travelling block, hook etc. 8 tons 17637 lbs1000 m 3281 ft1500 m 4921 ft

HWDP length 300 m 984 ft150 m 492 ft100 m 328 ft

Mud density 1.4 kg/l 11.68 ppgDepth of stuck point 3384 m 11117 ftDepth of back-off 2500 m 8202 ftTool joint matting surface area 21.93 3.4

141.2 317430 lbsMax torsional limit for 1000 m DP 12 1/2 turns/1000 m 12 1/2 turns/3281 ft

Procedures

1. Before any back-off, determine the depth of stuck point. Decide the depth of back-off.2. Make up the drill string to 80% of the torsional limit of the drill pipe in tension ( weight of drill string in mud ). Read the torsional limit in the "Drilling Data Handbook" K21-K24 chart, and multiply by the back-off depth/1000 m ( back-off depth/3280,84 ft ). Make-up the drill string to the right.3. Set the neutral point at the depth of back-off. The weight indicator should show the cal- culated tension.4. Apply leftward twist amounting to 80% of the rightward twist used to make-up the string.

Calculation of weight of drill string in mud 107 tons 234880 lbs

80% of max. torsional limit at back-off depth in tension 25 right turns 25 right turns

Hydrostatic pressure at the depth of back-off 34335 kPa 4982 psi

Weight in mud of free length of drill pipe + block 68 tons 149504 lbs

Weight indicator tension at neutral point 75 tons 166446 lbs

80% of rightward turns for applying leftward twist 20 left turns 20 left turns

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DP1 real weight /including tool joint/DP2 real weight /including tool joint/

DC1 real weightDC2 real weight

DP1 lengthDP2 length

DC1 lengthDC2 length

cm2 in2

DP1 torsional strength 103daN

Fill in ONLY the section above with data and the program will calculate by itself !!!

DC

2D

C1

HW

DP

DP

1D

P2

Bit

D21
See it in "Drilling Data Handbook" K21-K24 chart. Do not forget, tension = weight of drill string in mud !
Page 52: Drilling Calculation