Dual Concentric Procedure

Well Completions And Productivity

Outline Procedure for the Installation of a Dual Concentric ESP System. Occidental, Ecuador, Block 15

Disclaimer Notice This information is presented in good faith, but no warranty is given by and Schlumberger assumes no liability for advice or recommendations made concerning results to be obtained from the use of any product or service. The results given are estimates based on calculations produced by a computer model including various assumptions on the well, reservoir and treatment. The results depend on input data provided by the Operator and estimates as to unknown data and can be no more accurate than the model, the assumptions and such input data. The information presented is Schlumberger's best estimate of the actual results that may be achieved and should be used for comparison purposes rather than absolute values. The quality of input data, and hence results, may be improved through the use of certain tests and procedures which Schlumberger can assist in selecting. Freedom from infringement of patents of Schlumberger or others is not to be inferred. Copyright Statement This document remains the property of Schlumberger and is Confidential and Trade Secret. Do not disclose, use, or reproduce without written approval from Schlumberger.

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Description Draft issued for comment

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Date

Check

30/05/2005

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Client Appr

Date: 31/05/2005

Schlumberger Private

Prepared by Brian Scott, Euan Jamieson

Well Completions And Productivity

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Special Equipment

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Well Control

3

Tubular Torque Values

4

Lower Completion Preparation

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Running Lower Completion

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Pressure Testing the Model S Packer and Casing

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Upper Completion Preparation

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Upper Completion Spooler layout

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Tailpipe Assembly Schlumberger Private

10 Lower ESP / Pod System 11 Intermediate Assembly 12 Upper ESP / Flow Crossover System 13 Running Outer Production Tubing 14 Running Inner Production Tubing 15 Attached Drawings 15.1

Completion Drawing

15.2

Bypass Clamp Orientation Drawing

15.3

Bypass Space Out Drawing

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Special Equipment            

Well Control TBA?

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Tubular Torque Values

Connection 2-7/8” 8.6lbs/ft New Vam 3-1/2” 9.3lbs/ft EUE 5-1/2” 20lbs/ft New Vam 5-1/2” 17lbs/ft BTC 7” 26.0lbs/ft BTC

4

Minimum ft lbs 1170 2350 5860

Optimum ft lbs Maximum ft lbs 1300 1430 3130 3910 6510 7160 Refer Pipe Markings Refer Pipe Markings

Lower Completion Preparation Fluid Cleanliness? All completion assemblies are torqued, measured, drifted, and pressure tested prior to running the completion. A casing scraper should be run on the workstring and a 8.525” wireline gauge ring should be run on wireline prior to running the completion assembly. Remove wellhead bore protector Ensure all the tie-down bolts are fully retracted

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Dual Stove Pipe (25 Tons) Pod Work table 2-7/8” Safety Clamp (20 Tons) 2-7/8” Vam FJL Lifting Nubbins 7” Pod Pressure Test Sub 2-3/8” Slips, Dog Collar, Elevators and Pick-up Elevators 2-7/8” Slips, Dog Collar, Elevators and Pick-up Elevators 3-1/2” Slips, Dog Collar, Elevators and Pick-up Elevators 5-1/2” Slips, Dog Collar, Elevators and Pick-up Elevators 7” Slips, Dog Collar, Elevators and Pick-up Elevators API Drifts for 2-7/8” 8.6lbs/ft, 3-1/2” 9.3lbs/ft, 5-1/2” 17.0lbs/ft, 5-1/2” 20.0 lbs/ft, 7” 26.0 lbs/ft MultiSensor RIH Panel

Well Completions And Productivity

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Running Lower Completion Make up onto the Schlumberger setting tool the following assembly  2-7/8 Model A Tubing shear plug  2-7/8 EUE L-80 Seating nipple with 2.25 R profile  2-7/8 x 10 foot EUE L-80 pup joint  Tailpipe adapter from seal bore x 2 7/8 EUE  10-foot seal bore extension  Seal bore coupling  9-5/8 Model S wireline set permanent seal bore packer  Wire line adapter kit for 9-5/8 permanent packer RIH to setting depth with the assembly at a normal running speed. Note: The casing must be in good condition and the packer set in a section of the hole that is relatively straight. Set packer. POOH with the setting tool.

Inspect shear stud to the ensure proper shear was obtained. 6

Pressure Testing the Model S Packer and Casing Make up a 9-5/8 retrievable compression set packer and locator seal assembly onto the work string Run in hole and set the retrievable packer approximately 20ft above the Model S permanent packer, below the upper perforations. Note: The retrievable packer is set with right hand rotation and then applied (set down) weight of 30,000 lbs will energize the packing elements. Pressure the tubing to 1500Psi to test the completion packer assembly, and hold for 5 minutes. Once the packer has been tested continue to pressure up on the tubing to blow out the tubing shear plug. The pressure to blow the tubing shear plug will be approximately 2500Psi. Note: In case the plug blows prematurely a slickline plug can be set in the ‘R’ nipple to test the packer. Release the retrievable packer and continue to RIH. Tag the completion assembly to ensure it is properly set and verify the setting depth. A set down weight on the assembly of 15,000 lbs is sufficient. POOH to above the upper perforations and reset the retrievable packer. Test the casing by applying 1000Psi down the annulus. Release the packer and POOH.

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At surface inspect the setting tool and wireline adapter kit to ensure all parts are recovered.

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Upper Completion Preparation All completion assemblies are torqued, measured, drifted, and pressure tested prior to running the completion. Mark the motors along their full length (each section) showing the alignment of the Pothead (so that alignment of the Pothead can be seen at the base of each lower motor) Fit the motor base adaptors and MultiSensors to the ESP Motors for both the lower and upper systems, observing the correct orientation for the pressure discharge line (refer bypass clamp orientation drawing) Pick up and make up the 15ft spacer pup joint to the Pod hanger. Lay the completed sub assembly on the deck. Pick up and make up the upper most bypass tubing assembly to the bypass leg of the flow crossover assembly. Lay the completed sub assembly on the deck. Stroke out the Telescopic Swivel Nipple 12”.

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Upper Completion Spooler layout XXXXXX

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Tailpipe Assembly Pick up the mule shoe, seal units, spacer tube, locator seal assembly and pup joint. RIH and secure the pup joint in the rotary table with slips and dog collar. Pick up and make up the seating nipple and 1 x 3-1/2” EUE tubing joints. Pick up to remove slips, and RIH with the assembly. Secure the tubing joint in the rotary table with slips and dog collar. Pick up and make up the first blast joint. Pick up to remove slips, and RIH with the assembly. Secure in the rotary table with slips and dog collar. Continue to make up the remaining 2 blast joints in the same manor. Pick up and make up the shear sub (with pup joints). Ensure the shear sub is fitted with X number of shear screws to give a shear force of XXXlbs. Pick up to remove slips and RIH with the assembly. Secure pup joint in the rotary table with slips and dog collar. Pick up and make up the remaining X x 3-1/2” EUE tubing joints. RIH and secure the last joint in the rotary table with slips and dog collar.

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Lower ESP / Pod System Pick up the Pod bottom sub assembly in the elevators and make up to 3-1/2” EUE tubing. RIH and set the 7” pup joint in the slips. Pick up and make up the first Pod casing joint. Remove the slips and RIH. Continue to make up the remaining X x 7” Pod casing joints in the same manor. Rig up slick line and set the 2.250” Plug in tailpipe seating nipple. Pick up the Pod top sleeve with pup joint attached using the pressure test sub and make up. RIH and set in slips securing with dog collar. Pressure test the Pod assembly to 3000Psi for 15mins. Remove the pressure test cap and recover the plug. Locate the work-table over the top of the Pod assembly ensuring that the top threads of the Pod are protected. Pick up the lower motor with MultiSensor attached. Make up the ¼” pressure discharge line to the MultiSensor and pressure test to 3000psi for 15mins.

Slowly run the assembly into the Pod casing, servicing the motor as required. Land the motor lifting clamp on the worktable. Pick up and make up the tandem protectors. Pick up the assembly and remove the UT motor lifting clamp. Tie in the lower ESP MLE to the motor pothead and perform electrical tests on ESP and MultiSensor. Fit the MLE clamp to the lower neck of the lower protector, and torque to 55ft lbs. Secure the MLE and ¼” pressure discharge line in the cable clip and torque to 25 ft lbs. Slowly run the assembly into the Pod casing, servicing the protector as required. Fit the MLE clamp to the lower neck of the upper protector, and torque to 55ft lbs. Position the open end of the 3/8” and ¼” chemical injection lines below the cable clip. Secure the MLE, ¼” pressure discharge line, 3/8” and ¼” chemical injection lines in the cable clip and torque to 25 ft lbs. Continue to RIH and land the protector lifting clamp on the worktable. Pick up and make up the lower pump (with intake). Pick up the assembly and remove the protector lifting clamp. Fit the MLE clamp to the lower neck of the pump (above the intake) and torque to 55ft lbs. Secure the MLE, ¼” pressure discharge line, 3/8” and ¼” chemical injection lines in the cable clip and torque to 25 ft lbs. Slowly run the assembly into to the Pod casing. Land the pump lifting clamp on the worktable. 278588872.doc

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Fit the MLE clamp to the lower neck of the motor, and torque to 55ft lbs. Secure the ¼” pressure discharge line in the cable clip and torque to 25 ft lbs.

Well Completions And Productivity

Make up the pressure discharge sub to the pump flange. Pick up the Pod hanger assembly (with the spacer pup joint and discharge head attached). Make up the discharge head to the pressure discharge sub flange. Pick up and remove the pump lifting clamp. Cut the ¼” pressure discharge line and terminate to the pressure discharge sub. Fit the MLE clamp to the discharge head, and torque to 55ft lbs. Secure the MLE, 3/8” and ¼” chemical injection lines in the cable clip and torque to 25 ft lbs. Slowly run the assembly into the Pod casing until the hanger is at working height. Cut the 3/8” and ¼” chemical injection lines and terminate in the ports on the underside of the Pod hanger. Fit the penetrator / pigtail into the adaptor in the Pod hanger. Measure and mark MLE for cable splice. Retrieve the penetrator / pigtail from the hanger. Splice the MLE to the penetrator / pigtail. Re-fit the penetrator to the hanger and secure. Pressure test the seals through the hanger test port in accordance with BIW procedures.

Slowly run the assembly into the Pod casing until the hanger engages the top sleeve. Lift outer locking ring to allow witness of correct seal engagement in top sleeve seal bore. Make up outer locking ring to top sleeve. Connect a hand pump and chart recorder to the Pod hanger test port and pressure the hanger seals to 3000Psi for 15 mins. Connect the 3/8” and ¼” chemical injection line to the ports on the top face of the Pod hanger. Run in hole, and set the string in the 3-1/2” slips on the handling sub above the Pod hanger.

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Remove the worktable from the top of the Pod

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Intermediate Assembly Pick up the first joint of 3-1/2” EUE tubing and make-up to the top of the Pod assembly. RIH through the rotary table slowly to a suitable working height position for the cable splice. Secure the string in the rotary table with slips and dog collar. Splice upper pigtail to MLE extension. Pick up to remove slips. Continue to RIH and secure slips and dog collar. Pick up and make up the shear sub (with pup joints). Ensure the shear sub is fitted with X number of shear screws to give a shear force of XXXlbs. Pick up to remove slips. RIH with the assembly installing cross coupling clamps at each coupling. Secure pup joint in the rotary table with slips and dog collar. Continue to RIH making up the remaining 2 x 3-1/2” EUE pup joints, installing cross coupling clamps at each coupling. Set the last 3-1/2” EUE tubing joint in the slips.

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Upper ESP / Flow Crossover System Fit the swivel lift nubbin to the pump support assembly. Pick up the assembly with elevators and make up to the string with the tongs. Pick up to remove slips. Lower the assembly through the rotary table (bypass still held by elevators) Position the ESP worktable (stove pipe) over the rotary table. Fit the bypass safety clamp to the groove in the tubing, and torque to 200ft/lbs. Note: The bypass tubing will be grooved to provide a suitable location for the heavy duty safety clamp to be fitted. Unlatch the elevators. Pick up the first bypass tubing sub assembly with the elevators and make up to the string using the tongs. Note: The bypass tubing lengths will have been predetermined and supplied specifically for each system in order to facilitate make ups with the power tongs . Remove the safety clamp and the worktable. POOH and re-set the slips below the Pump Support Sub.

Bypass Tubing

90°

ESP Lifting Clamp ESP Lifting Clamp Bolt Flanges

ESP Plan view of optimum clamp fitting arrangement

Manoeuvre motor and MultiSensor over the spear on the pump support sub. Make up the spear to the base of the MultiSensor with wrenches. Pick up to remove slips. Secure the lower ESP cable, 3/8” and ¼” Chemical injection lines in the pump support cable clip. Slowly RIH to the MultiSensor. Make up the ¼” pressure discharge line to the MultiSensor and pressure test to 3000Psi for 15mins. RIH with the assembly servicing the motor as required. At the motor flange, fit the safety clamp to the groove on the bypass tubing and torque to 200ft lbs. 278588872.doc

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Pick up the motor with the MultiSensor already attached. Note: When fitting the lifting clamp to the motor, observe the line previously marked for the pothead orientation. Fit the clamp so that when the ESP Motor is alongside the bypass tubing, the clamp bolt flanges will lie at 90° to the tubing with the pothead alignment mark in the correct position relative to the bypass tubing. Refer to the bypass clamp orientation drawing and see diagram below:

Well Completions And Productivity

Unlatch the elevators. Pick up the next bypass tubing sub assembly with the elevators and make up to the string using the tongs. (see bypass space out drawing) Remove the lower motor lifting clamp. Pick up the upper motor. Note: Use the same orientation procedure as detailed for the lower motor, when fitting the lifting clamp to the upper motor. Make up the upper motor to the lower motor. Remove the safety clamp. Ensure the pothead alignment mark is still correctly orientated with respect to the bypass tubing. Fit the bypass clamp to the lower neck of the upper motor and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the ¼” pressure discharge line from the upper MultiSensor in the other cable clip. (as per bypass clamp orientation drawing). Torque both clips to 25ft lbs RIH with the assembly servicing the motor as required. At the motor flange, fit the safety clamp to the groove on the bypass tubing and torque to 200ft lbs.

Remove the upper motor lifting clamp. Pick up the tandem protectors and make up to the top of the upper motor. Tie in the upper ESP MLE to the UT motor pothead and perform electrical tests on ESP and MultiSensor. Remove the safety clamp. Fit the bypass clamp to the lower neck of the protector and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the MLE and the ¼” pressure discharge line from the upper MultiSensor in the other cable clip. (as per bypass clamp orientation drawing). Torque the clips to 25ft lbs RIH servicing the protectors as required. At the lower neck of the upper protector fit the bypass clamp and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Position the end of the upper 3/8” chemical injection line below the bypass clamp. Secure the upper MLE, ¼” pressure discharge line and upper 3/8” chemical injection line in the other cable clip. (as per bypass clamp orientation drawing). Torque the clips to 25ft lbs. RIH with the assembly servicing the protectors as required. At the protector flange, fit the safety clamp to the groove on the bypass tubing and torque to 200ft lbs. Unlatch the elevators. Pick up the next bypass tubing sub assembly with the elevators and make up to the string using the tongs. (see bypass space out drawing) Remove the protector lifting clamp. Pick up the lower pump with intake attached and make up to the top of the protectors. Remove the safety clamp. Fit the bypass clamp to the lower neck of the pump (above the intake) and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the upper MLE, upper 3/8” chemical injection line and the ¼” pressure discharge lines in the other clip (as per bypass clamp orientation drawing). Torque the clips to 25ft lbs. 278588872.doc

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Unlatch the elevators. Pick up the next bypass tubing sub assembly with the elevators and make up to the string using the tongs. (see bypass space out drawing)

Well Completions And Productivity

RIH with the assembly to the pump flange. Fit the safety clamp to the grooved on the bypass tubing and torque to 200ft lbs. Unlatch the elevators. Pick up the next bypass tubing sub assembly with the elevators and make up to the string using the tongs. (see bypass space out drawing) Remove the lower pump lifting clamp. Pick up the middle pump and make up to the top of the lower pump. Remove the safety clamp. Fit the bypass clamp to the lower neck of the middle pump and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the upper MLE, upper 3/8” chemical injection line and the ¼” pressure discharge lines in the other clip (as per bypass clamp orientation drawing). Torque the clips to 25ft lbs. RIH with the assembly to the pump flange. Fit the safety clamp to the grooved on the bypass tubing and torque to 200ft lbs. Rig up slickline and set plug in the nipple above the Pod hanger assembly. Pressure test the 3-½” tubing and bypass tubing to 3000 psi for 15 mins. Recover plug.

Pick up the upper pump. Make this up to the top of the lower pump. Remove the safety clamp and pump lifting clamp. Fit the bypass clamp to the lower neck of the upper pump and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the upper MLE, upper 3/8” chemical injection line and the ¼” pressure discharge lines in the other clip (as per bypass clamp orientation drawing). Torque the clips to 25ft lbs. RIH with the assembly to the top of the pump flange. Fit the safety clamp to the grooved on the bypass tubing. Make up the pressure discharge sub to the pump flange. Orientate the discharge head over the pressure discharge sub. Slowly lower the elevators. This will allow the telescopic swivel nipple to ‘contract’. Make up the discharge head on the flow crossover assembly to the pressure discharge sub. Remove the pump lifting clamp (if it was not removed prior to the last action). Close the telescopic swivel nipple and lock using lock ring. Take the weight of the assembly with the elevators. Remove the safety clamp and worktable. Cut the ¼” pressure discharge line and terminate to the pressure discharge sub. Fit the bypass clamp to the discharge head and torque to 55 ft lbs. Secure the lower MLE, lower 3/8” and ¼” chemical injection lines in one cable clip. Secure the upper MLE and upper 3/8” chemical injection line in the other clip. Torque the clips to 25ft lbs. RIH to the flow crossover tool. Secure the MLEs and lines into the clips at either side of the tool.

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Pick up the flow crossover assembly with the elevators. Make up the bypass tubing leg of the assembly to the string using the tongs. The flow crossover may be swivelled away from the rotary table so that the discharge head leg does not obstruct the next action.

Well Completions And Productivity

RIH to suitable location for the cable splices. Splice the lower MLE, lower 3/8” and ¼” chemical injection lines to the main cable (main cable with 2 x 3/8” capillary tube). Splice the upper MLE and upper 3/8” chemical injection line to the other main cable (main cable with 2 x 3/8” capillary tubes)

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Running Outer Production Tubing Run in hole with 5-1/2” production tubing, installing cross coupling clamps at each coupling to secure and protect the two power cables. 100ft above the top perferations record the up and down string weights. Continue to RIH until the tailpipe assembly enters the packer. Space out the completion in the isolation packer and land off in the wellhead. Rig up slickline and run in hole with 3.688” standing valve. Land standing valve in flow crossover nipple profile and pressure test 5 “production tubing to 3000Psi for 15 mins. Pull out of hole with 3.688” standing valve. Rig down slickline.

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Running Inner Production Tubing

Make up the 2-7/8” internal production tubing to the stinger sub assembly and RIH. Space out the 2-7/8” internal production tubing in the flow crossover assembly and land off in the wellhead. Rig up slickline, run the 1.687” standing valve and set in the seal assembly nipple profile. Pressure test the 2-7/8” EUE tubing string against 1.687” standing valve to confirm pressure integrity of 2-7/8” tubing and stinger seal assembly to 3000Psi for 15 mins. Monitor the pressure via the MultiSensor for possible indication of leaks. Bleed off pressure and RIH with slickline to retrieve standing valve. Pull out of hole with 1.687” standing valve and rig down slickline. Continue to nipple down BOP, nipple up Xmas tree, etc.

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Pick up stinger assembly, taking care not to damage seals.

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Attached Drawings

15.1 Completion Drawing 15.2 Bypass Clamp Orientation Drawing 15.3 Bypass Space Out Drawing

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