003.0 surface sampling operating procedures

REF: OP 019 R E V: 03 DATE: 26 April 1999 PAGE 1 of 9

S U R FACE SAMPLING - GENERAL GUIDELINES

PREPARED BY: RS VERIF IED BY : DG A P P R O V E D B Y: GD

1.0 GENERAL GUIDELINES

1.1 Before sampling commences, the Client's Test Engineer must verbally confirm that separatorconditions are stable and suitable for sampling.

1.2 Chemical injection upstream of the separator must be stopped to avoid sample contamination(delay between cessation of chemical injection and commencement of sampling must be ofsufficient length to ensure the separator has been purged). If flowing conditions dictate thatchemical injection must continue during sampling, injection rates, injection points and injectedchemicals must be recorded on the sample data sheets.

1.3 The well test service company's Shift Supervisor must be aware of the sampling operation beforesampling commences.

1.4 Sample datasheets must be completed with the correct data. The Client's Test Engineer shouldconfirm verbally that the correct information has been used.

1.5 Pressurised samples should be labelled as follows:-- The box should have a plasticised label attached to the RHS handle.- The bottle should have a plasticised label attached to the top protector.- The green status tag should be removed.- A completed sample datasheet should be placed inside the box in a poly self-seal bag.- The correct hazard diamond labels should be stuck on the top of the box and on the sample

bottle.

1.6 Atmospheric samples should be labelled as follows:-- The container should be marked up with sample details (sample no, sample nature, sample

point, well, test number, date/time, Client, installation) using a paint marker or similar indeliblepen.

- A completed self adhesive sample label should be stuck on the container, and if the containerhas a handle, a plasticised label should be attached.

- Drums which are likely to be stored in the open should have sample and well number scratchedon.

- The correct hazard diamond labels should be stuck on the sample container.

The triplication of details is necessary as labels, paint, etc can all come off, rendering the sampleunidentifiable and useless.

1.7 When filling atmospheric containers with crude, leave a 10% space for expansion inside thecontainer. Allow the sample to de-gas for as long as possible before screwing the lid on, as agitationduring shipping causes evolution of gas which can rupture the container. Do not allow rainwater,spray, etc to contaminate the sample while it is de-gassing.

1.8 Generally, atmospheric oil samples should be taken in metal containers and atmospheric watersamples into plastic or glass containers. Metal containers should be IATA approved. (UN numberon the can).

1.9 Do not use third party gauges for sampling as they may have been used for mercury displacementsampling and may contaminate the sample (in the case of gas sampling the introduction of mercurywill damage the sample cylinder).

Warning: The controlled source document of this procedure is stored on Oilphase homepage(http://www.aberdeen.oilphase.slb.com). Any paper version of this procedure is uncontrolled and

should be compared with the source document at time of use to ensure it is up-to-date.



1.10 Separator oil sampling point should be midstream on the oil line, upstream of the meters. The oillevel sight glass should be used only if there are no suitable sampling points on the oil line. Thesight glass must be purged and refilled several times and the check valve set in the "open" position.Avoid emptying the sight glass while sampling (which allows the sample bottle to fill with gas).

1.11 Separator gas sampling point should be the highest available point on the separator gas outlet line,upstream of the orifice meter. A sampling point on the underside of the gas outlet line should beavoided however, as liquid carry over may if present be taken into the gas sample bottle.

1.12 Separator pressurised oil and gas sampling should be carried out at the same time where thesamples are to be used for recombination. This ensures that both samples are taken under the sameseparator conditions and can be matched with each other.

2.0 LIQUID SURFACE SAMPLING using the Oilphase Conventional Bottle

2.1 Place sample bottle in stand (Item 9) using bottle collar (Item 7). Fit top oil manifold (item 5),bottom manifold (item 4) and connect pump (Item 11) to the bottom manifold bleed valve V4.Open CSB V3, CSB V1 and V4 and pressure up bottle to oil line pressure ie separator pressure. SeeFigure 1.

2.2 Close V4 and disconnect pump.

2.3 Connect liner (item 3) between top manifold and sampling point valve V1.

2.4 Ensure all valves are closed.

2.5 Pressure up liner by opening valve V1.

2.6 Open V2 and purge liner by opening V3. Purge at least five liner volumes. Close V3.

2.7 Open CSB V2 and gently open CSB V1. Purge 2 to 3 liner volumes across piston in sample bottlethrough 1/4" slimline autoclave elbow (Item 6) to CSB V1 port.

2.8 Close CSB V1. Remove 1/4" slimline autoclave elbow and plug CSB V1 port. Proceed to takesample by gently opening V4 and allowing sample to displace the water/glycol mixture into themeasuring cylinder. Record time for commencing sampling. Observe sight glass level to avoiddrawing gas into the sample bottle.

2.9 Maintain separator pressure on bottom manifold gauge at all times and to avoid sample "flash".Use V4 to control water/glycol displacement and bottle pressure.

2.10 After displacement of 600 cc of water/glycol V4 should be closed followed by CSB V2. check thatCSB V1 and V4 are closed, CSB V3 is open.

2.11 Open V4 and remove a further 60 cc of water/glycol to create a 10% gas cap for shipping.CAUTION: Care should be taken not to allow the piston to bottom out as it will becomeunbalanced.

2.12 Record the final pressure, the ambient temperature and the end time of sampling. Close CSB V3and open V4 to bleed bottom manifold. Close V1, open V3 and bleed down liner pressure.

2.13 Disconnect the liner and both manifolds. Plug CSB V1, CSB V2 and CSB V3 ports. Check bottle forleaks, label the bottle and box and complete a surface sample datasheet. When the sampling reportis printed, print an additional copy of the datasheets to accompany the sample.



Figure 1. Liquid Surface Sampling using the Conventional Sample Bottle (CSB)

Index

I tem Description Reference Q t y

1 1/2" NPT (m) x 1/4" JIC (m) adapter QR0900 12 1/4" NPT (m) x 1/4" JIC (m) adapter QR0899 13 100K 1/4" JIC synflex liner (8 ft) QR0989 24 Oil manifold (bottom) AR0886 15 Oil manifold (top) AR0887 16 1/4" SL autoclave 90 purge nipple AR0892 17 Sample bottle collar QR0501 18 19 mm box spanner AT0157 19 Bottle stand QR0893 11 0 Test gauge (1,500 psig) QR0904 111 Enerpac hand pump QT0113 11 2 Measuring cylinder (1 Litre) QT0143 11 3 Conventional sample bottle (CSB) PR0767 1



3.0 LIQUID SURFACE SAMPLING using the Oilphase Single-phase Sample Bottle

3.1 Check Sample Bottle Status Form (F-153) Under normal circumstances bottle will be shipped full of50/50 glycol/water mix.

3.2 Place sample bottle in stand. See Figure 2.

Figure 2. Monophasic Liquid Surface Sampling using the Single-phase Sample Bottle (SSB)


1 1/2" NPT (m) x 1/4" SL Autoclave (m) adapter QR0906 12 1/4" NPT (m) x 1/4" SL Autoclave (m) adapter QR0526 13 10K 1/4" JIC synflex liner (8 ft) QR0898 14 Oil manifold (bottom) AR0888 15 Oil manifold (top) AR0889 16 1/4" SL autoclave 90 purge nipple AR0892 17 Sample bottle collar QR0501 28 19 mm box spanner AT0157 29 Bottle stand QR0893 21 0 Test gauge (10,000 psig) QR0902 111 Air operated glycol/water pump N / A 11 2 Measuring cylinder (1 Litre) QT0143 11 3 Conventional sample bottle (CSB) PR0767 11 4 Single-phase sample bottle (SSB) PR0768 11 5 1/4" SL autoclave polyflex liner 8 ft QR0897 31 6 1/4" SL Autoclave (m) x 1/4" JIC (m) adapter QR0131 41 7 1/4" SL autoclave (m) x 1/4" JIC (m) adapter AR0901 11 8 OFN regulator c/w 1/4" JIC (m) adapter QT0138 11 9 OFN bottle spanner QT0174 1



3.3 Fit upper Item 5 and lower item 4 manifolds. Note Sample bottle valves are operated using 19 mmbox spanner. (Item 8).

3.4 Connect glycol/water pump to the lower manifold bleed valve V4. Flush manifold with glycol/water prior to tightening connection to bottle.

3.5 Open V4, SSB V3, SSB V1 and pressure up lower manifold and below bottle piston to wellheadpressure.

3.6 Close V4 and remove pump.

3.7 Connect liner (Item 15) between upper manifold and sampling point V1.

3.8 Ensure all valves are closed (except for SSB V3).

3.9 Pressure up liner by opening valve on sampling point V1.

3.10 Purge line through bleed valve V3, then open SSB V2 and purge across sample bottle piston byopening SSB V1.

3.11 Close SSB V1. Note: If oil is extremely viscous glycol/water pressure below piston may have to bereduced in order to allow flow across the top of the piston.

3.12 Proceed to take sample by gently opening lower bleed valve and allowing sample to displace waterinto measuring cylinder.

3.13 Maintain wellhead pressure on gauge at all times to avoid sample "flash" using V4 to controlpressure and water flow.

3.14 A 600 cc sample should be taken then V4 should be closed, followed by SSB V2.

3.15 Bleed off line between upper manifold and sample point, disconnect liner.

3.16 Connect regulated oxygen free nitrogen (OFN) supply to valve CSB V1.

3.17 Connect glycol/water pump to valve CSB V3.

3.18 Connect OFN liner (Item 15) between CSB V2 and SSB V4 (port marked N).

3.19 Purge OFN line by opening valves CSB V1, CSB V2, SSB V4 and loosening liner connection at SSBV4. Tighten liner connection to SSB V4.

3.20 Regulate OFN supply to 200 psig and fill booster bottle slowly by opening valve CSB V3 andglycol/water pump bleed valve.

3.21 Increase OFN pressure to maximum bottle pressure (max pressure of full cylinder is 2,000 - 3,000psig).

3.22 Close CSB V1. Bleed OFN and rig down liner.

3.23 Ensure valve SSB V4 is open, boost OFN pressure using glycol/water pump to sample pressure.

3.24 Using glycol/water pump regulator set at least 500 psi above sample pressure, slowly open valveV4 and remove a further 60 cc of glycol/water in order to create a nitrogen gas cap for shipping.

3.25 Close all sample bottle valves, bleed off pressure in manifolds prior to removing. Plug all valves.



3.26 Label the sample bottle and box, and complete a sample datasheet. A copy of the datasheet mustaccompany the bottle.

4.0 GAS SAMPLING

4.1 Check bottle has been evacuated to less than 1.0 mbar or less than 10 mmHg.

4.2 Connect gas manifold (Item 4) to top valve on bottle, GSB V1 with suitable test gauge (separatorpressure >33%, <75% of full scale.)

4.3 Connect liner (Item 3) to V1 on separator gas sampling point and to V2 on gas manifold. See Figure3 .

Figure 3


1 1/2" NPT (m) x 1/4" JIC (m) adapter QR0900 12 1/4" NPT (m) x 1/4" JIC (m) adapter QR0899 13 10K 1/4" JIC synflex liner (8 ft) QR0898 24 Gas sampling manifold AR0890 15 Secondary gas sampling manifold AR0891 16 Test gauge (1,500 psig) QR0904 17 1/4" NPT (m) x Gerzat adapter AR0706 18 1/4" JIC (m) x Gerzat adapter AR0894 19 Gerzat PTFE bush QT0705 11 0 20 litre Luxfer gas sample bottle 111 20 litre Gerzat gas sample bottle 1



4.4 Check V1 and GSB V1 are closed . Open V2 and V3. Open V1 and purge at least five liner volumesof gas through the gas manifold.

4.5 Close V3. The gas manifold gauge should now read separator pressure.

4.6 Crack open bottle valve GSB V1, avoiding pressure drop on gauge. Record time for commencingsampling.

4.7 Set GSB V1 so gas is bleeding as slowly as possible into bottle (this can be heard through bottlewall).

4.8 Sampling time for 20 litre cylinder should be 20-30 mins - periodically check bottle is filling bycycling GSB V1 again avoiding pressure drops on gauge.

4.9 When bottle is full close valves V2 and GSB V1.

4.10 Reduce gas manifold pressure by carefully opening and closing valve V3. (Drop pressure byminimum registerable on test gauge).

4.11 Open cylinder GSB V1 and confirm gas manifold gauge pressure rises to original samplingpressure. (This confirms cylinder is full of gas and did not plug during sampling).

4.12 Open V2 to restore separator pressure to bottle.

4.13 Close GSB V1. Record the final pressure, ambient temperature and the time for the completion ofsampling.

4.14 Close V1, open V3 and bleed down liner and gas manifold pressure.

4.15 Disconnect the liner and gas manifold. Plug GSB V1 and GSB V2 and attach red FULL tags to GSBV1 and GSB V2 valve bodies.

4.16 Check bottle for leaks, label the bottle and box (refer to step 1.4) and complete a surface sampledatasheet. When the sampling report is printed, print an additional copy of the datasheet toaccompany the sample.

4.17 It is not advisable to install a test gauge on bottle valve GSB V2 to monitor pressure, as condensatewhich forms in the bottle during sampling will be lost when the gauge is removed, thus changingthe sample composition.

4.18 If multiple gas samples are to be collected simultaneously connect second liner (Item 3) frommanifold valve V3 to secondary manifold valve (Item 5) valve V4 and continue from Step 4.3.

5.0 PRODUCED WATER SAMPLING (For general chemical analysis, not for dissolved organics)

5.1 Use new, clean glass or polyethylene bottles, one litre is preferable. The caps should have a plasticnot paper or foil liners.

5.2 Collect the sample using a small tube or hose inserted into the bottle to the bottom. Let the wateroverflow the bottle for a half bottle volume. The idea of the tube is to minimise aeration. Once thebottle is full, dump a little (50 ml) out to allow for expansion.

5.3 If possible, measure and record the pH and temperature of the sample.

5.4 Seal the bottle, check for leaks, label the bottle (refer to step 1.6) and complete a Surface SamplingDatasheet.



5.5 Collect a second sample of the same water in a new bottle using the technique described above.Add 5 ml of 10% HNO3 (nitric acid) to the bottle. NOTE: HCl can be used but the added Cl canconfuse analysis. This will prevent iron and calcium from precipitating as the samples cool andoxidise. The second sample is not critical, but very useful when it comes time to look at corrosion.

5.6 It is recommended to repeat this process several times during the well test. This is the only way toknow if all the drilling fluids have been flushed out of the system

6.0 PRODUCED WATER SAMPLING (for dissolved organics)

6.12 Use clean glass bottles, not polyethylene.

6.2 Fill through a tube as above but do not overflow.

6.3 Seal the bottle with a cap using telfon liner. Check for leaks, label the bottle. Refer to Step 1.6 andcomplete a Surface Sampling Datasheet.

7.0 ATMOSPHERIC OIL SAMPLING

7.1 When dead oil sampling is to be undertaken, ensure that the separator or sample flowline issuitably earthed.

7.2 Only rated pressure equipment is to be used for this task. Ensure that all valves, adapters andhoses are suitable for the pressure, temperature and service involved

7.3 Only metal IATA approved cans are to be used. They can be identified by the UN logo marked inwhite near the can or drum base.

7.4 The earthing cable with clips MUST be fitted between the sampling hose end outlet and the samplecan and also from the IATA can to the separator earth point . These earthing cables MUST be fittedprior to and during sampling.

7.5 Personnel must ensure that metal buckets/drip trays are used for the collection and gathering ofhydrocarbon samples or waste.

7.6 This earthing connection to the bucket/drip tray must be directly to the bucket/drip tray body andnot the bucket handle, it is not acceptable to consider the bucket/drip tray sufficiently earthed byway of its physical contact with the separator skid or the rigs decks.

7.7 All operational personnel must ensure that no plastic containers, buckets, sampling cylinders, driptrays and associated vessels that may be used, or have the potential to be used for the collection orstorage of hydrocarbons, are present in the well test area, workshop or laboratory.

7.8 The only exception to this will be during the taking of a sample of hydrocarbon for the measure-ment of liquid specific gravity or a BS&W. In this case the sample may be collected in the suppliedglass measuring cylinders that will now replace the previous used plastic versions.

7.9 If the client requires a dead oil sample to be taken from the separator oil line or the surge tank, thenan earthing cable must be fitted between the valve at which the sample will be emitted, or the fittedflying lead on the separator, and the sample container ensuring that a metal to metal contact existsbetween the earthing cable clip and sample container.

7.10 If it is necessary to purge hydrocarbons from any valve or sampling point to atmosphere via ametal bucket or drip tray, the following procedure must be followed.



7.11 Place an empty metal bucket/drip tray on the separator skid or rig deck immediately below thepoint of hydrocarbon release and connect the earthing flying lead directly to the bucket body sothat the bucket is grounded to the pipe or vessel containing the hydrocarbons.

7.12 Slowly open the valve to release the hydrocarbons in a controlled manner so as to reduce as far aspracticable the potential to create fluid friction and any resultant static.

NOTE: Any static that is produced will dissipate to earth via the earthing cable from themetal bucket/drip tray to the rig structure, this prevents a potential difference between thehydrocarbon source and receptor and the resultant chance of a static charge being released.

7.13 Always use an empty bucket/drip tray before commencing operations of this nature and once theoperation is complete or if the bucket becomes half full, empty the bucket before continuing theoperation.

NOTE: It is critical that the inventory of hydrocarbons contained in open buckets or driptrays is kept to a minimum in the well test area, this would be crucial in the event of a fire.

7 .14 Once the operation is complete close the sampling/purging valve and then remove theearthing cable from the container and remove it from the area to the waste oil drum. Emptythe contents from the waste container to the drum and then replace the drum cap.

7 .15 If replacing the bucket/drip tray to the site of hydrocarbon discharge the earthing cable mustbe reconnected before leaving the area.

7 .16 Never hang a bucket from any point on the well test equipment by its handle, all buckets ordrip trays must be in physical contact with the equipment’s skid or rigs deck and an earthinglead connected.

7.17 Leave at least a 10 - 20% space for expansion inside the container. Allow the sample to de-gas foras long as possible before screwing on the lid as agitation during shipping causes evolution of gaswhich could cause the vessel to rupture. Do not allow rainwater, spray, etc to contaminate thesample while it is de-gassing.

7.18 The sample should be labelled as per Section 1.6 of this procedure.

REF: OP 091 R E V: 03 DATE: 28 June 2000 PAGE 1 of 4

W O R K S H O P S E R V I C E O F C S B

PREPARED BY: DMW VERIF IED BY : DG A P P R O V E D B Y: GD

DO NOT PROCEED with service until it has been established that the CSB has at least 6 months of validcertification left.

When using this procedure, al l personnel must wear the appropriate PPE:- safety glasses,safety boots, coveral ls, etc. Protective gloves should be worn when handling al lchemica ls .

BEFORE CONTINUING with the process of emptying and cleaning a bottle, confirm that the bottle doesnot contain a sample still required by the Client. Do not proceed unless written confirmation exists toproceed.

WARNING: The contents of the sample bottle may contain poisonous and/or flammable gas. Thecontents should be tested for the presence of hydrogen sulphide using a suitable meter and theappropriate steps taken to reduce exposure to the Operator.

1.0 EMPTYING CONVENTIONAL SAMPLE BOTTLE (CSB) Refer to DR 766

1.1 Ensure all valves on sample bottle and single valve end are closed.1.2 Remove all valve plugs. Beware of any pressure trapped behind plugs.1.3 Connect bleed pipe to valve port V2 and put other end into waste container.1.4 Slowly open V2 to allow sample to escape into waste container.1.5 Once sample has stopped close V2, leaving bleed pipe connected to V2.1.6 Connect nitrogen hose to V3 and use nitrogen regulator to apply 100 psi.1.7 Open V3 and push sample piston to top of bottle, slowly opening V2 draining the remaining

sample into the container.1.8 Once sample cylinder empty close V3 and V2, bleed off and disconnect nitrogen hose from V3.1.9 Disconnect bleed pipe from V2 and connect to V3.1.10 Connect nitrogen hose to V2.1.11 Using nitrogen regulator apply 100 psi. Open V2.1.12 Slowly open V3 allowing sample piston to move to bottom of sample cylinder pushing water/

glycol out into waste container.1.13 Close V2 and bleed off and disconnect nitrogen hose.1.14 Open V2 ad V3 slowly draining remaining nitrogen above sample piston.1.15 Disconnect bleed pipe and open all valves fully, ensure there is no pressure left inside sample

cylinder.1.16 Slacken off cylinder grub screw and remove single valve end.1.17 Remove piston and agitation ring from sample cylinder carefully.1.18 Remove o-rings, GT seals, back up rings and slipstrip from sample piston and single valve end.

BUR and slipstrip can be re-used if necessary.

N O T E : ALL CSB COMPONENTS SHOULD BE KEPT TOGETHER DURING CLEANING ANDASSEMBLY PROCEDURES. ENSURE ALL COMPONENTS ARE SUITABLY ENGRAVED/ETCHED WITH SERIAL NUMBER OF BOTTLE.





2.0 CLEANING AND REDRESS OF CONVENTIONAL SAMPLE BOTTLE (CSB)

2.1 Clean all parts thoroughly using either a designated solvent cleaning system or in the absence ofsuch a system use a suitable solvent such as Safety Kleen washing out the residue with a pH 7detergent such as Decon Neutracon. Ensure that all local environmental and health regulationsare followed when disposing of waste and handling solvents and chemicals.

2.2 Dry all components thoroughly, ensure all moisture is removed from the sample areas.2.3 Note and update sample bottle history Form (Form 058) with any changes of serial numbers on

component parts. CHECK ALL PARTS OF THE BOTTLE ARE PRESSURE RATE THE SAME ie10K, 13K or 15K. DO NOT MIX RATINGS.

2.4 Dry all components thoroughly. Ensure all moisture is removed from sample areas.2.5 Inspect all components for wear or damage.2.6 Note and update Sample Bottle History (Form 058) with any changes of serial numbers on

component parts. CHECK THAT ALL PARTS OF BOTTLE ARE PRESSURE RATED THE SAME IE10K, 13K OR 15K. DO NOT MIX RATINGS.

2.7 Inspect and reassemble bottle with new seals. Molykote silicone grease should be used to coatelastomers. Do not apply excessively.

3.0 INSPECTION OF CSB BEFORE REDRESS

3.1 Sample cylinder- Cylinder bore including o-ring seal face - free of scratches.- Internal thread - no damage or galling.- Autoclave threads - no damage or galling.- Autoclave seat - no scratches, etc.

3.2 Piston- GT seal groove - no scratches.- Outside diameter - no high spots.

3.3 Agitation Ring- No scratches or high spots.

3.4 Single Valve Block- o-ring grooves - no scratches.- Thread - no damage or galling.- Autoclave threads - no damage or galling.- Autoclave seat - no scratches, etc.

3 . 5 Autoclave Valves - To Check Valve Packing Torque- R e m o v e v a l v e h a n d l e .- Slacken off packing grub screws.- Using torque wrench (35 - 40 ft/ lbs) check torque on packing nut is correct.- T ighten grub screws.- Replace valve handle .



4 . 0 R O U T I N E P R E S S U R E T E S T F O R C S B

SAFETY NOTE

All pressure testing to take place in pressure test bay ensuring the pump is situated outside the testbay. On no account should any unauthorised personnel enter the test bay when high pressure isapplied to the assembly. Use only fully rated and traceable pressure fittings and hoses. Do not over-tighten high pressure metal to metal sealed fittings and connections.Inspect all pressure equipment and fittings prior to carrying out testing.

All pressure tests should be recorded on a calibrated chart recorder (six month re-calibration interval)

4.1 Close V3 and open V1 and V2 connect nitrogen line to V3 and regulate nitrogen to a maximum of100 psi.

4.2 Open V3 slowly pushing the piston and agitation ring up to the sample end of the bottle.4.3 Close V3 and bleed off the nitrogen line.4.4 Slowly open V3 fully and bleed the remaining nitrogen from the sample bottle.4.5 Connect nitrogen to V1 and regulate nitrogen to a maximum of 100 psi then flush across the top of

the piston and agitation ring.4.6 Close V2 slowly and push the piston back down the sample bottle until it connects with the valve

end.4.7 Close V1 and bleed off the nitrogen line.4.8 Slowly open V1 fully and bleed the remaining nitrogen from the sample bottle.4.9 Ensure valves V1 and V2 are open.4.10 Close V3 and connect test manifold to valve port but do not tighten.4.11 Connect water/glycol pump to manifold and flush through until all air is expelled from manifold

and nitrogen line.4.12 Tighten manifold into bottle once all air is expelled. Pressure up manifold to maximum working

pressure of sample bottle to test manifold. (This also tests V3 in the closed position, from theopposite direction from normal).

4.13 Upon completion of successful test, bleed off pressure from manifold.4.14 Open V3 fully and pressure up bottle in increments stopping every 5000 psi to ensure there are no

leaks in bottle, by doing this we are testing the piston seals.4.15 Monitor pump for any leaks and hold test for 15 minutes.4.16 Upon completion of successful test, bleed off pressure to zero. Disconnect CEJN QRC from hose/

manifold.4.17 Close V3 and attach nitrogen to V1 (using short 90° Nipple) and flush across top of piston and

agitation ring.4.18 Remove slimline plug from manifold and connect 90° nipple to port in manifold4.19 Close V2 and pressure up to 500 psi. Slowly open V3 to displace 120 cc of water/glycol from each

sample bottle in turn, close each V3 in turn.4.20 Close V1, trapping 500 psi at sample end and bleed off nitrogen line.4.21 Re-connect CEJN QRC from pump liner to manifold4.22 Start pump and raise pressure to 500 psi against closed V3 on each sample bottle4.23 Slowly open V3 fully on each sample bottle and increase pressure in increments stopping every

5000 psi until maximum working pressure is achieved.4.24 Monitor chart for any leaks for 5 minutes.4.25 Upon completion of successful test, bleed pressure off until 500 psi is reached.4.26 Insert valve plugs into V1 and V2 on each sample bottle.4.27 Fully open valves V1 and V2 and increase to maximum working pressure.4.28 Monitor chart for any leaks for 5 minutes.4.29 Upon completion of successful test, bleed off pressure until 500 psi is reached.4.30 Slowly slacken valve plugs bleeding the pressure from V1 and V2.4.31 Pump the bottle to a pressure of 5,000 psi thus ensuring the bottle is full of water/glycol.4.32 Bleed pressure down to zero4.33 Repeat pressure up to 5,000 psi to ensure the sample bottles are full of water/glycol (pressure

should rise immediately if no air is present in the water.4.34 Bleed to zero and disconnect manifold



4.35 Close all valves (V1, V2 and V3) and plug all valve ports.4.36 Mark the chart with serial number, the pressure it was tested, date of the test and Technicians

name.4.37 Complete Conventional Sample Bottle Status Form 043 and place a copy in the bottle box and

original in the bottle file.4.38 The following items should be placed in the bottle box in a plastic sealed bag,

- Inspection Release Note for Sample Cylinder- 2 x Flammable Gas labels- 2 x Sample Data label- US DOT Exemption as appropriate- UK HSE exemption to CDG-CPL2 Regulations.

4.39 Complete a green status label and attach it to the sample bottle box.4.40 Ensure the sample bottle box is fit for purpose and presentable. Remove all rust and corrosion

and re-paint or replace affected parts.4.41 Ensure certification database is updated. File test charts in bottle vertical file.

5.0 M A R K I N G

With the introduction of the UK Regulations:

Health and Safety Executive SI 2092 (1996), The Carriage of Dangerous Goods (Classification, Packagingand Labelling) andUse of Transportable Pressure Receptacles Regulations.

It is a requirement that all oil sample bottles being shipped in the UK are marked with the followingexemption number:

- CDGCPL2 – EO 1/2000

This should be marked by vibro-engraving or chemical etching on the ID band on the sample bottlecylinder.


WORKSHOP SERVICE OF SSB

PREPARED BY: DMW VERIF IED BY : DG A P P R O V E D B Y: GD

DO NOT PROCEED with this service until it has been established that sample cylinder and nitrogencylinder have at least 6 months of valid certification left.

BEFORE CONTINUING with the process of emptying and cleaning a bottle, confirm that the bottle doesnot contain a sample still required by the Client. Do not proceed unless written confirmation exists toproceed.

WARNING: The contents of the sample bottle may include poisonous and/or flammable gas. Therefore,the bottle should be disassembled in a well ventilated area.

The contents of the sample bottle may contain poisonous and/or flammable gas. The contents should betested for the presence of hydrogen sulphide using a suitable meter and the appropriate steps taken toreduce exposure to the Operator.

1.0 EMPTYING SINGLE-PHASE SAMPLE BOTTLE (SSB) Refer to DR 765 and DR 1404

1.1 Close all valves on sample bottle and double valve end.1.2 Remove all valve plugs. Beware of any pressure trapped behind plugs. Slowly open V3 releasing

any nitrogen.1.3 Connect bleed pipe to valve port V2 and put other end into waste container.1.4 Slowly open V2 to allow remaining sample to escape into waste container.1.5 Once gas pressure is bled off V2, leave bleed pipe connected to V2.1.6 Connect nitrogen hose to V4 and use nitrogen regulator to apply 100 psi.1.7 Open V4 and push sample piston to top of bottle, slowly opening V2 draining the remaining

sample into the container.1.8 Once sample cylinder empty close V4 and disconnect the nitrogen hose.1.9 Disconnect bleed pipe from V2 and connect to V4.1.10 Connect nitrogen hose to V2 and apply 100 psi.1.11 Open V4 slowly allowing the water/glycol to drain into the waste container, allowing piston to

move to the bottom of the cylinder.1.12 Close V2 and bleed off and disconnect nitrogen hose.1.13 Open V2 and V3 slowly draining remaining nitrogen.1.14 Disconnect bleed pipe and open all valves fully. Ensure no trapped pressure remains inside SSB.1.15 Slacken off cylinder grub screw (QT 421).1.16 Unscrew nitrogen cylinder (AR 096) from sample chamber (AR 095), allowing excess water to drain

out into a suitable waste container.1.17 Remove piston (QR 118) and agitation ring (QR 119) from sample chamber. Remove GT seal and

slipstrip from piston. BUR and slipstrip can be re-used if necessary.1.18 Place nitrogen cylinder (QR 122) in the vice, slacken off grub screw and unscrew double valve block

(AR 100).1.19 Unscrew retainer (QR 125), disassemble nitrogen piston (QR 123) and rod (QR 124) from nitrogen

cylinder.1.20 Remove all elastomers, slipstrips and back up rings from components, keeping all separate bottle

components together.





2.0 CLEANING AND REDRESS OF CONVENTIONAL SAMPLE BOTTLE (CSB)

2.1 Clean all parts thoroughly using either a designated solvent cleaning system or in the absence ofsuch a system use a suitable solvent such as Safety Kleen washing out the residue with a pH 7detergent such as Decon Neutracon. Ensure that all local environmental and health regulationsare followed when disposing of waste and handling solvents and chemicals.

2.2 Dry all components thoroughly, ensure all moisture is removed from the sample areas.2.3 Note and update sample bottle history Form (Form 058) with any changes of serial numbers on

component parts. CHECK ALL PARTS OF THE BOTTLE ARE PRESSURE RATE THE SAME ie10K, 13K or 15K. DO NOT MIX RATINGS.

2.4 Dry all components thoroughly. Ensure all moisture is removed from sample areas.2.5 Inspect all components for wear or damage.2.6 Note and update Sample Bottle History (Form 058) with any changes of serial numbers on

component parts. CHECK THAT ALL PARTS OF BOTTLE ARE PRESSURE RATED THE SAME IE10K, 13K OR 15K. DO NOT MIX RATINGS.

2.7 Inspect and reassemble bottle with new seals. Molykote silicone grease should be used to coatelastomers. Do not apply excessively.

3.0 INSPECTION OF SSB BEFORE REDRESS

3.1 In order to ensure the correct and safe operation of the sample bottle, a through inspection of allparts is required before redress.NOTE: Any damage should be reported to the Workshop Supervisor.

3.2 Sample cylinder- Cylinder bore including o-ring seal face - free of scratches or high spots.- Internal thread - no damage or galling.- Autoclave threads - no damage or galling.- Autoclave seat - no scratches, etc.

3.2 Piston- GT seal groove - no scratches.- Outside diameter - no high spots.

3.3 Agitation Ring- No scratches or high spots.

3.4 By-pass Rod- o-ring grooves - no scratches.- Surface finish of rod - as new.

3.5 RetainerThread - no damage or galling

3.6 Nitrogen Cylinder- o-ring grooves - no scratches.- o-ring face - no scratches or high spots.- Piston bore - no scratches or high spots.- Threads - no damage or galling.

3.7 Double Valve Block- o-ring grooves - no scratches.- Thread - no damage or galling.- Autoclave threads - no damage or galling.- Autoclave seat - no scratches, etc.- N-Stamp - still visible.

3.8 Autoclave Valves- To Check Packing Torque- Remove valve handle.- Slacken off packing grub screws.- Using torque wrench (35 - 40 ft/lbs) check torque on packing nut is correct.- Tighten grub screws.- Replace valve handle.



4.0 REDRESSING AND ASSEMBLING OF SSB

4.1 Before redressing, check all serial numbers are updated on the Bottle History Form (Form 058) andany changes of component parts or numbers noted.

4.2 Replace seals are follows. Refer to DR 765 and DR 1404.Light smear of silicon grease on all o-rings and tee seals.Light covering of copper slip on all threads, except autoclave port.

4.3 Place bypass tube in double valve block.NOTE: On some of the bottles a rod-spacer is required. This can be positioned after the nitrogencylinder is in position.

4.4 Screw on nitrogen cylinder.4.5 Push nitrogen piston onto rod and screw on retainer.4.6 Place sample cylinder in vice and insert agitation ring.4.7 Insert piston into cylinder and push in carefully.4.8 Screw nitrogen cylinder onto sample cylinder or double valve block to ensure sample ports are at

90° to nitrogen and water/glycol ports.

5.0 ROUTINE PRESSURE TEST FOR SSB

S A F E T Y N O T E

All pressure testing shall take place in a designated pressure test bay ensuring the pump is situatedoutside the test bay. On no account should any unauthorised personnel enter the test bay when highpressure is applied to the assembly. Use only fully rated and traceable pressure fittings and hoses. Donot over-tighten high pressure metal to metal sealed fittings and connections.Inspect all pressure equipment and fittings prior to carrying out testing.

All pressure tests should be recorded on a calibrated chart recorder (six month re-calibration interval)

5.1 Open all valves on bottle (V1, V2, V3, and V4).5.2 Close V2 and connect nitrogen to V1, regulate nitrogen pressure to 100 psi and push sample piston

and agitation ring to the bottom of the bottle, then open V2 fully to bleed off nitrogen anddisconnect.

5.3 Connect nitrogen to V3, regulate nitrogen pressure to 100 psi and push nitrogen piston to the top ofthe nitrogen sub. Bleed off nitrogen and disconnect from V3.

5.4 Close V4 and connect manifold to valve port, but do not tighten.5.5 Connect water/glycol pump to manifold and flush with water/glycol.5.6 Tighten manifold into bottle once all air is expelled. Pressure up manifold to maximum working

pressure to test manifold (this will test V4 in the closed position from the opposite direction fromnormal). Monitor chart.

5.7 Upon completion of successful test, bleed off pressure from manifold.5.8 Open V4 fully and pressure up bottle in increments stopping every 5,000 psi to ensure there are no

leaks evident in bottle, thereby testing the piston seals and nitrogen sub seal.5.9 Monitor chart for any leaks and hold test for 15 minutes.5.10 Upon completion of successful test, bleed off pressure to zero. Disconnect CEJN QRC from hose/

manifold.5.11 Remove slimline plug from end of test manifold.5.12 Close V4 and attach nitrogen to V3 (using short 90° Nipple) and pressure up to 500 psi.5.13 Slowly open V4 to displace water/glycol from each sample bottle nitrogen sub in turn, close each

V3 in turn trapping 500 psi of nitrogen in nitrogen cylinder chamber.5.14 Close V4 and attach nitrogen to V1, slowly flush across the sample end of the bottle, approx 50 psi.

Close V2.5.15 Slowly open V4 and remove 120 cc water from each bottle in turn, close each V4 in turn.5.16 Increase nitrogen pressure to 500 psi.5.17 Close V1, trapping 500 psi nitrogen, bleed off nitrogen line and disconnect.5.18 Replace the slimline plug into the test manifold.



5.19 Re-connect CEJN QRC from pump liner to manifold.5.20 Start pump and raise pressure to 500 psi against closed V4 on each sample bottle.5.21 Once 500 psi is achieved slowly open V4 fully on each sample bottle and increase pressure in

increments stopping every 5,000 psi until maximum working pressure of sample bottle is achieved.5.22 Monitor chart for any leaks for 5 minutes.5.23 Upon completion of successful test, bleed pressure off until 500 psi is reached.5.24 Insert valve plugs into V1, V2 and V3.5.25 Fully open valves V1, V2 and V3 and increase to maximum working pressure of bottle.5.26 Monitor chart for any leaks and hold for 5 minutes.5.27 Upon completion of successful test, bleed pressure off until 500 psi is reached.5.28 Slowly slacken valve plugs bleeding the nitrogen pressure from V1, V2 and V3.5.29 Pump the bottle up to a pressure of 5,000 psi, thus ensuring the bottle is full of water/glycol.5.30 Bleed pressure down to zero.5.31 Repeat the pressure up to 5,000 psi to ensure each sample bottle is full of water. (Pressure should

rise immediately if there is no air present in the water).5.32 Bleed pressure down to zero.5.33 Close V4 and disconnect manifold.5.34 Close all valves (V1, V2, V3 and V4) and plug all valve ports.5.35 Mark the chart with serial number, the pressure it was tested, date of the test and Technician's

name.5.36 Complete Singlephase Sample Bottle Status (Form 042) and place a copy in the bottle box and

original in the bottle vertical file.5.37 The following items should be placed in the bottle box in a plastic sealed bag

- Inspection Release Note for Sample Cylinder and Nitrogen Cylinder- 2 x Flammable Gas labels- 2 x Sample Data label- US DOT Exemption as appropriate- UK HSE exemption to CDG-CPL2 Regulations

5.38 Complete a green status label and attach it to the sample bottle box.5.39 Ensure the sample bottle box is fit for purpose and presentable. Remove all rust and corrosion and

re-paint or replace affected parts.5.40 Ensure certification database is updated. File test charts in bottle vertical file.

6.0 M A R K I N G

With the introduction of the UK Regulations:

Health and Safety Executive SI 2092 (1996), The Carriage of Dangerous Goods (Classification, Packagingand Labelling) andUse of Transportable Pressure Receptacles Regulations.

It is a requirement that all oil sample bottles being shipped in the UK are marked with the followingexemption number:

- CDGCPL2 – EO 1/2000

This should be marked by vibro-engraving or chemical etching on the ID band on the sample bottlecylinder.

REF: OP 077 R E V: 01 DATE: 3 November 1995 PAGE 1 of 1

G A S S A M P L E C Y L I N D E R C L E A N A N D T E S T P R O C E D U R E

PREPARED BY: DM V E R I F I E D B Y : CD A P P R O V E D B Y: KM

1 . Log the following information from the gas sample bottle:-

a) Cylinder serial nob ) Date of original certificationc) Date of last certificationd ) Volume of cylindere) Cylinder typef ) Valve typeg ) Valve outlet

A copy of this information and work to be carried out must be returned to Oilphase prior to workcommencing.

2 . Dump contents if any, take the necessary safety precautions. Remove valves.

3 . Clean cylinder thoroughly both internally and externally.

4 . Dry cylinder completely.

5 . Inspect cylinder walls, threads for damage. If a 5 year recertification is necessary Bureau VeritasSurveyor should be present.

6 . Fill bottle with fluid and pressure test to maximum working pressure or test pressure forduration as applicable.

7 . Upon completion of satisfactory test drain fluid and dry cylinder thoroughly, particularlyinternal ly.

8 . Refit valves and draw a vacuum of <1 mBar, plug valves.

9 . Ensure transit box is clean and fit for purpose. Label cylinder and box. Arrange shipment withthe following documentation enclosed:-

- 2 x Sample labels- 2 x Flammable gas labels- 1 x Bureau Veritas release note- 1 x Gas bottle service form



REF : OP021 R E V: 02 DATE: 10 March 1994 PAGE 1 of 2

R O U T I N E P R E S S U R E T E S T O F G A S S A M P L E C Y L I N D E R

PREPARED BY: CF V E R I F I E D B Y : GD A P P R O V E D B Y: KM

This document has been issued as an "Uncontrolled" documentand shall not be subject to amendment or update unless

overstamped "Controlled Copy" in red ink.

1 Lay gas sample cylinder on its side. Open then close both valves to check there is no pressure inthe cylinder.

2 Connect vacuum pump to valve A.

3 Ensure valve B is closed.

4 Open valve A and evacuate cylinder to < 2 mm Hg.

5 When vacuum has been achieved close cylinder valve A.

6 Disconnect vacuum pump and connect nitrogen hose from FTU to valve A. (Leave connection tovalve A finger tight).

7 Flush hose from FTU to gas sample cylinder with OFN before tightening connection into valve A.

8 Open valve A to fill cylinder with OFN.

9 Boost OFN pressure with FTU nitrogen booster to maximum working pressure of cylinder (200 bar;2900 psig).

10 When pressure has stabilised hold for 30 mins.

11 Using Snoop check for leaks paying particular attention to:

threaded connection of valves to cylinder body.

Stem packings of valve A.

Valve port B.

12 If pressure test is successful (no leaks, stable pressure) plug valve port B and open the valve. (Ifnecessary boost OFN to re-establish test pressure).

13 Close valve A and bleed off hose pressure at FTU.

14 Disconnect FTU nitrogen hose and adapter from cylinder.

15 Using snoop check for leaks paying particular attention to:

Stem packings of valve B.

Valve port A.

16 If no leaks are found during 30 mins monitoring period open valve A to carefully bleed off OFNpressure from cylinder.

17 Re-connect vacuum pump to valve A and evacuate cylinder to < 2 mm Hg.

18 When vacuum has been achieved close valves A and B.

REF : OP021 R E V: 02 DATE: 10 March 1994 PAGE 2 of 2

R O U T I N E P R E S S U R E T E S T O F G A S S A M P L E C Y L I N D E R

19 Plug valve A.

20 Complete form 044 and place copy in self-sealing plastic bag inside gas sample cylinder box. Fileoriginal form 044 in gas cylinder status file. Copy form 044 to Operations Manager who willupdate the bottle status board and the bottle files.

21 Write out green label and attach to cylinder box as per OP010.

22 Place gas sample cylinder in serviced equipment area in its transportation box.

REF: OP 110 R E V: 01 DATE: 17 July 1996 PAGE 1 of 2

USE OF WELKER SAMPLE CYLINDER CP7MA

PREPARED BY : DD V E R I F I E D B Y : GD A P P R O V E D B Y: KM

1.0 I N T R O D U C T I O N

This procedure is specific for the CPA-1000MA cylinder but is applicable to generally most Welkerpiston sample cylinder. This procedure describes how to introduce a sample into the cylinder andhow to mix the sample prior to analysis.

2.0 D E S C R I P T I O N

The Welker cylinder is a piston cylinder with two flanges or end cap labelled "product inlet" and"precharge end" plus a protruding indicator rod from the precharge end. The cylinder is usuallyequipped with valves at each end and bursting discs at each end. The cylinder also has facilities formixing the sample via an internal rod and paddle inside the indicator rod.

3.0 S A F E T Y

As with all sample cylinders the working pressure and ratings of valves, fittings and tubing andbursting disc have to be applicable for the job in hand. When handling pressurised cylinder andsamples the proper safety clothing and equipment should be used. This procedure should only becarried out by a suitably experienced and trained individual.

4.0 S A M P L I N G P R O C E D U R E

4.1 Prepare the cylinder by pressurising it at the precharge end to a pressure equal to or slightlyabove the sampling pressure.

4 .2 Connect the sampling point valve to the product inlet valve via a suitable pipe, liner or tube.An additional pressure gauge is advised somewhere along this pipe.

4 .3 To purge the lines of sample either:-

a) Open the sampling point valve and purge at the pipe to product inlet valve fittingfor 3 - 5 times the volume of the pipe volume.

o r b ) Open the sampling point valve and purge 3 - 5 times the pipe volume via anadditional valve on a "T" piece just prior to the product inlet valve, if fitted.

o r c) Open the sampling point valve and the product inlet valve and purge via anadditional valve on the product inlet end cap or flange, if fitted.

4 .4 Let the sample fill the cylinder by gradually releasing precharge end fluid via an additionalvalve and pressure gauge. Ensure that the pressure at the product inlet and the prechargeend do not vary greatly.

4 .5 When the indicator rod reaches the indicator cap close the valves at the precharge end thenclose the product inlet valve. Finally close the sampling point valve. The cylinder shouldnow contains 800 cc of sample. If applicable create a gas cap by bleeding 80 cc from theprecharge end.



REF: OP 110 R E V: 01 DATE: 17 July 1996 PAGE 2 of 2

USE OF WELKER SAMPLE CYLINDER CP7MA

4.6 Disconnect all pipes and gauges taking care of residual pressure and sample in the pipes andplug the valves on the cylinder.

4 .7 Take a note of final pressure of the sample, temperature, sampling point, time and date ofsampling, duration of sampling and any other available data for the sample sheet.

4 .8 Box and label the cylinder for shipping to storage or the laboratory for analysis or as directed.

5.0 P R E P A R A T I O N O F S A M P L E F O R A N A L Y S I S

5.1 Ensure the cylinder serial number corresponds correctly to client instructions and/or deliveryticket and any sampling sheet. Record the serial number on Sample Volume Tracking (Form087) .

5 .2 Check all fittings for leaks and if any leaks are found record this on Form 087. Seal the leaks ifpossible.

5 .3 Ensure the cylinder is secure and safe for the following steps.

5 .4 Measure the opening pressure and cylinder temperature on Form 087 by connecting a waterpump and calibrated pressure gauge to the precharge end and by the use of a calibratedtemperature probe.

5 .5 Decide on a working pressure for the sample. This pressure should be as low as possiblebelow any bursting disc rating but much higher than the samples bubble point or samplingpressure.

5 .6 Pressure the sample to the working pressure by pumping into the precharge end.

5 .7 Mix the sample by removing the indicator rod cap and screwing in firmly the mixing rod andhandle. Stoke the mixing rod handle 3 - 5 times maintaining a firm grasp on the handle at allt imes.

5 .8 Isolate pump and drain water from the precharge end. Measure the volume of water andrecord this on Form 087. Sample volume is 1,000 minus the drained water volume.

5 .9 Repeat 5.6 and 5.7 until the pressure in the cylinder is stable and remove the mixing rod andhandle and replace the indicator rod cap.

5 .10 The sample is now ready for transfer or flashing as required by the Client.

REF: OP 193 REV: 02 DATE: 28 February 2001 PAGE 1 of 3

WSM WELLSITE SAMPLING MODULE (PR 2111)OPERATING PROCEDURES

PREPARED BY: MI VERIFIED BY: DG APPROVED BY: JB

1.0 I N T R O D U C T I O N

The Wellsite Sampling Module (WSM) allows high temperature/pressure wellhead samples to be takensafely, by the use of hard piping on all liners and high temperature rated valves. The module allows thefitment of up to six SSBs or CSBs. The option to use test gauges to monitor the sample pressure alsoexists. A removable drain/purge tank is fitted to the module. Optional transport wheels that can befitted to the module (see DR2399).

During sampling operations, correct safety procedures should be observed, all operators must wear theappropriate PPE: disposable lab coat/coveralls, hard hat, safety glasses/face shield, safety shoes, etc.Wear breathing apparatus if appropriate. Protective gloves should be worn when handling all chemicals.The sample bottles should be prepared as per normal Oilphase practice and have green tags etc.

2.0 SETUP PROCEDURE (REFER TO DR2397 FOR SCHEMATIC VIEW)

2.1 The WSM, as shipped, should have the end panels removed. Check that the drain/purgetank is empty before commencing (a suitable place should be found for the effluent, observingany local QHSE policy and/or local environmental regulations).

2.2 The sample bottles should be mounted to the module with the sample end of the bottle to thesample end of the WSM. Leave the clamps unsecured for now. The WSM can have either SSB orCSB fitted and the correct set of 1/8" water/glycol liners should be used (longer liners are for theSSB, shorter for the CSB).

2.3 The blanking plugs should be removed and stored from the bottles and the liners to connect to theWSM fitted to the bottles. There are two liners for the sample end and one for the water/glycolend. The liners at the sample end should be 180º apart with the port at the water/glycol end at 90ºto these. When fitting the liners at the water end an adapter is required from the 1/8" Taperseal tothe ¼" slimline autoclave connection of the bottle. These can be tricky to fit and care should betaken when doing so. Once the liners are all fitted and tightened the clamps can be secured.

2.4 If required, test gauges for the sample and water/glycol can be fitted to the top of the module tomonitor the pressures more accurately than the panel mounted gauges. The fittings for the testgauges are very similar to those found on FTU, etc and have to be folded out and adjusted tosupport the gauge correctly.





3.0 PRESSURE TEST WATER/GLYCOL SYSTEM (REFER TO DR2395)

Using a transfer bench or similar pump, connect the water/glycol liner to the CEJN quick connect fittingmounted on the WSM, marked "Water/Glycol Inlet". Ensure that all the isolation valves for the water/glycol side are closed and that all the valves on the bottles are closed.

3.1 Open isolation valve and purge the gauge with the water/glycol.

3.2 Pressure up the water/glycol system to the expected Wellhead Pressure (WHP) plus 4,000 psig, to amaximum of 15,000 psig. Check the system holds pressure.

3.3 One at a time, the isolation valve and the bottle water/glycol valve should be opened, and thebottle pressured up to the same test pressure. Observe for leaks. Close isolation valve for eachbottle, leaving the valve in the bottle fully open to avoid washout. Repeat for the remaining bottles.Bleed off the liner pressure.

3.4 Remove the water liner from the WSM.

4.0 PRESSURE TEST SAMPLE SYSTEM (REFER TO DR2396)

Using the nitrogen supply and gas booster if required, the sample side of the WSM should be tested up tothe drain valve, to the same test pressure as the water/glycol side. Connect the liner to the "Sample Test"bulkhead, on the bleed down line. The liner to the wellhead should ideally not have a valve fitted in lineto minimize risk of backing off, etc. The customer could test this liner up to the first isolation valve of theWSM, with water, along with the wellhead.

4.1 Purge the line of air, up to and including the test gauge if fitted, with oxygen-free nitrogen.

4.2 Open the bottle valves and isolation valves for each bottle in turn, but not the upstream isolation tothe wellhead, or the drain valves (the drain pipe work is rated to 3,000 psig only, and is open endedanyway).

4.3 Pressure up the system to the same test pressure as before and check for leaks, one bottle at a time.

4.4 Repeat for remaining bottles.

4.5 Bleed off the nitrogen test pressure slowly. Failure to do so could result in damage to the drain/purge tank. This tank is vented, but cannot sustain the volumetric flow of dumping the test gasfrom 15, 000 psi if done quickly. Close all isolation valves, leaving the bottle valves fully open toavoid risk of washout of these valves. Remove the nitrogen liner from the WSM.



5.0 OPERATING PROCEDURE (REFER TO SCHEMATIC DR2397)

5.1 The sample valves and the water/glycol valve on each CSB or SSB should now be fully open, withwater/glycol side of each, pressurised to expected WHP plus 4,000 psig (to a maximum of 15,000psig). All the isolation valves are closed.

5.2 Open the sample isolation valve for the sample bottle to be filled.

5.3 Open the sample drain valve (slowly) for the same bottle, and estimate purge of 2 - 3 liners volume.There is no provision to check the actual volume at present, so the Field Engineer should satisfythemselves that adequate volume has been purged through. Close drain valve.

5.4 Open isolation valve to water/glycol side of bottle.

5.5 Open purge/drain valve from water/glycol system slowly to avoid dropping pressure below WHP,to a measuring cylinder and drain out 600 cc of water and close valve. The time taken to sampleshould be the same as for conventional surface sampling.

5.6 Close all isolation and bottle valves for the bottle just filled, take care that when the sample cools,pressure will drop. Ensure that the pressure is maintained above WHP.

5.7 Record the closing pressure, bottle number and time.

5.8 Repeat for each remaining bottle as and when required, from step 5.2.

5.9 When sampling is complete, close the upstream isolation valve of the WSM.

5.10 Using the sample test isolation valve, allow the trapped pressure in the line to bleed off in to asuitable container and be disposed of according to local QHSE policy and /or local environmentalregulations.

5.11 Sample bottles can now be removed or replaced by empty bottles for further sampling. Rememberto replace the blanking plugs to the bottle valve ports. The samples should be labelled, etc inaccordance with Operating Procedure OP 019 Surface Sampling.

003.0 surface sampling operating procedures

Documents

sample details sample

sample container

sample cylinder

sample nature

sample datasheets

sample contaminationdelay

completed sample datasheet

sample data sheets