api sc13 tg08 wg05 spec 13a sec. 16 drilling-grade starch sc13 – drilling completion and...

API SC13 TG08 WG05

SPEC 13A Sec. 16 Drilling-grade Starch

SC13 – Drilling Completion and Fracturing Fluids

June 17, 2014



Call meeting to order

Proposed Agenda:

1. Background

2. Discuss proposed addendum

3. Action items

Work Group 05

• Formed: January 2012

• Charge:

The Work Group is expected to review the current API Specifications for Starch in 13 A and suggest revision and/or modification.




• Roll Call • How to determine Quorum? VOTE


WG5 Members Revised 01-20-2014.xlsx


Current Specifications


16.1 Principle

16.1.1. Drilling grade starch can be manufactured from several kinds of native starches. The starch should be made cold water hydratable (pregelatinized) and may be treated further in such a way that it is suitable for use as a filtrate reducing agent in water-base drilling fluids.

16.1.2. Drilling grade starch should be free-flowing and free from lumps. Drilling grade starch shall be deemed to meet this International Standard if a composite sample representing no more than one day's production conforms to the physical specifications of Table 15, represents the product produced, and is controlled by the manufacturer.

• Table 15 – Starch physical specificationsTest Parameter SpecificationSuspension Properties:

Viscometer dial reading at 600 r/min

-- in 40 g/l salt water Maximum 18

-- in saturated salt water Maximum 20

Filtrate volume

-- in 40 g/l salt water, cm3 Maximum 10

-- in saturated salt water, cm3 Maximum 10

Residue greater than 2,000 µm No Residue




• Previous meetings:

1. March 7, 2012 – Conference Call2. May 1, 2012 – Cargill Office – The Woodlands3. June 11, 2012 – Summer meeting, Denver4. December 4, 2012 - (Houston),video conference call5. January 22, 2013 - Winter meeting, New Orleans 6. March 7, 2013 – MI-Swaco, Houston7. June 24, 2013 – Summer meeting, Washington DC8. September 12, 2013 – Baroid, Houston, Had no quorum9. January 21, 2014 – Dallas




• Temperature Stability• Particle size (PSD)• Bacteria Content• Suspension Properties• Fluids Loss Control

Discussed Topics:



77 175 200 225 250 275 3000.002.004.006.008.00

10.0012.0014.0016.0018.00

Average 600 RPM Rheology Read-ing in 4% NaCl Solution

Temperature (°F)

60

0R

PM

Rh

eolo

gy R

ead

ing

Temp (F) A B C D E F average77 13.90 15.80 17.60 14.60 17.80 16.40 16.02

175 12.20 12.80 15.00 11.60 13.80 13.90 13.22200 13.00 12.60 14.20 11.60 11.60 12.80 12.63225 13.30 11.40 13.00 11.00 14.40 11.60 12.45250 12.90 11.20 12.20 11.60 12.60 11.60 12.02275 13.10 10.80 11.80 11.33 11.88 10.90 11.63300 11.40 9.10 9.50 9.50 9.83 8.90 9.71

4% NaCl Brine 600 RPM ReadingTemp (F) A B C D E F average

77 8.36 7.44 7.48 6.34 5.60 7.40 7.10175 8.68 7.94 7.56 6.72 6.16 8.12 7.53200 8.12 7.80 8.08 7.32 6.78 8.04 7.69225 7.92 7.76 7.36 8.28 5.82 7.80 7.49250 7.80 7.62 7.66 16.20 11.12 7.64 9.67275 7.84 7.56 7.44 22.97 18.65 8.12 12.10300 11.18 23.84 20.18 36.03 35.33 29.76 26.05

API Fluid Loss - 4% NaCl Brine

77 175 200 225 250 275 3000.00

5.00

10.00

15.00

20.00

25.00

30.00

Average API Fluid Loss in 4% NaCl Solution

Temperature (°F)

AP

I Fl

uid

Los

s (m

L)



Temp (F) A B C D E F average77 15.60 16.40 17.80 11.80 15.20 16.70 15.58

175 14.30 15.60 16.00 11.50 14.10 15.20 14.45200 15.00 15.40 15.00 11.10 12.20 15.60 14.05225 17.44 15.84 14.20 11.44 11.56 16.28 14.46250 16.20 15.30 16.30 11.30 12.40 15.20 14.45275 13.67 13.33 14.00 13.00 13.17 13.33 13.42300 20.33 11.83 12.00 14.00 14.00 12.50 14.11

Saturated NaCl Brine 600RPM ReadingTemp (F) A B C D E F average

77 8.78 6.72 7.10 5.76 4.46 7.76 6.76175 11.68 8.40 7.48 9.20 6.26 10.00 8.84200 14.50 8.76 6.96 11.12 8.16 12.70 10.37225 16.88 12.12 10.20 14.08 10.92 15.04 13.21250 25.76 20.72 14.32 23.08 17.80 23.60 20.88275 38.60 43.13 39.75 39.07 42.40 45.27 41.37300 89.33 90.93 95.50 70.80 89.63 89.13 87.56

API Fluid Loss - Saturated NaCl Brine

77 175 200 225 250 275 30012.00

12.5013.0013.5014.00

14.5015.0015.5016.00

Average 600 RPM Rheology Read-ing in Saturated NaCl Solution

Temperature (°F)

60

0R

PM

Rh

eolo

gy R

ead

ing

77 175 200 225 250 275 3000.00

10.0020.0030.0040.0050.0060.0070.0080.0090.00

100.00

Average API Fluid Loss in Saturated NaCl Solution

Temperature (°F)

AP

I Fl

uid

Los

s (m

L)

• Table 15 – Starch physical specifications

Test Parameter Specification

Suspension Properties:

Viscometer dial reading at 600 r/min

-- in 40 g/l salt water Maximum 18

-- in saturated salt water Maximum 20

Filtrate volume

-- in 40 g/l salt water, cm3 Maximum 10

-- in saturated salt water, cm3 Maximum 10

Residue greater than 2,000 µm No Residue




Action Items:

• Develop and addendum to the current API specifications in 13 A to address the temperature stability

• Propose initiating a new work group under TG8 to develop new specifications for high temperature starches OR change the charge of existing WG



Proposed addendums

Addendum 1

Addendum 2



Voted addendum

Addendum 1

What is next?

• Old Business

• New Business




• Thanks to all workgroup members and the participant labs



• Motion to Adjourn?


api sc13 tg08 wg05 spec 13a sec. 16 drilling-grade starch sc13 – drilling completion and...

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