Del Underground al Mainstream; primeros exponentes de rap

Note: In the unlikely event that a successful pressure test is not obtained on the seal assembly, it may be necessary to retrieve the seal assembly and investigate the problem.

1.0 If the running tool is still engaged on the seal assembly down hole, proceed to 5.0.

2.0 Make up running tool onto NC50 handling joint. Lubricate threads and inner lip of tool.

3.0 Slowly lower running tool through BOP and riser into the compact housing landing out on top of the seal assembly.

4.0 Rotate left hand to engage tool onto seal assembly thread.

5.0 Continue rotation approximately 8 turns (see 3.0 and 6.0 on page 53) until tool is fully engaged on thread and a firm stop is encountered. The torque required will increase as the running tool approaches 7 turns and the 8^th turn should be achieved within 5000 ft.lbf of make-up torque. DO NOT exceed 7,000 ft.lbf of make-up torque as the seal assembly latch pins may be sheared. Back off from this point a maximum of 45° (1/8th of a turn) right hand.

6.0 Retrieve seal assembly by overpull.

Note: An overpull of 15,000 lbf should be satisfactory to retrieve the assembly, DO NOT exceed 25,000 lbf.

7.0 To remove seal assembly from running tool, replace the installation tool and adjust bolt to fully compress the ring. Unscrew seal assembly right hand.

Running and retrieval of 13.5/8" nom. BOP test tool

Equipment

One 13.5/8" nom. combination tool, BOP tester Part no. 2125910-01 and wear bushing running tool, NC50

threads top and bottom

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Running and retrieval of 13.5/8" nom. BOP test tool

Running the combination tool at this stage does not allow testing of the compact housing upper annulus outlets. Should this be a requirement while testing the BOP, then a cup tester is to be used.

1.0 Make up NC50 handling joint into combination tool with pins facing up (see drawing).

Note: Do not tong on seal areas. Use minimum make up torque as the handling joint will need to be backed out to test the blind rams. Make up with chain tongs.

2.0 Check 'O' rings for damage and replace as necessary.

3.0 Lightly grease 'O' rings.

Note: Ensure the tiedown screws in the riser adaptor are fully retracted (4.25"

from O/D) and gland nuts are re-made tight before continuing with the next stage.

4.0 Lower tool through BOP stack and riser and land on seal assembly.

Note: Compare stick up above rotary table with that calculated to ensure at correct depth.

Note: Do NOT apply pressure below the Test Tool.

Note: The pressure test must be performed by applying pressure through Choke / Kill Lines. Ensure upper side pipe plug is correctly installed.

5.0 Fill stack full of water and close pipe rams around handling joint. Open the upper outlet valves in the compact housing to monitor any fluid passing.

6.0 Apply test pressure to BOP through kill line for required hold period.

Note: Maximum test pressure is 5,000 psi or equal to the maximum working pressure of the lowest rated item in the stack.

7.0 Release pressure and retract BOP rams.

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Blind Ram Test

8.0 Back out handling joint from combination tool.

9.0 Fill stack full of water and close blind rams and open the upper outlet valves in the compact housing.

10.0 Apply test pressure to BOP through kill line for required hold period. Monitor open upper outlet valve for any leakage past the test plug.

Note: Maximum test pressure is 5,000 psi or equal to the maximum working pressure of the lowest rated item in the stack.

11.0 Release pressure, ensure no check valve is in the kill line. Retract blind rams.

Close the upper valves in the compact housing. Retrieve the combination tool.

Running and retrieval of 13.5/8" nom. upper wear bushing

Equipment

One 13.5/8" nom. upper wear bushing, Part no. 2125916-01 8.845" min. bore

One 13.5/8" nom. combination tool, BOP Part no. 2125910-01 Tester and wear bushing running tool,

NC50 threads top and bottom

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Running of wear bushing

1.0 Check that 'O' rings on wear bushing are in good condition. Replace as necessary.

Lightly grease 'O' rings.

2.0 Make up combination tool with pins down onto an NC50 handling joint, avoid tonging on seal area.

3.0 Insert the combination tool into the wear bushing and rotate tool approx 90° right hand to fully latch into the wear bushing.

Note: Ensure the tiedown screws in the riser adaptor are fully retracted (4.25"

from O/D) and gland nuts are re-made tight before continuing with the next stage.

4.0 Lower wear bushing through B.O.P. stack and riser into the compact housing and land off on the seal assembly.

Note: Compare stick up above rotary table with that calculated to ensure at correct depth.

5.0 Lock wear bushing in place by engaging the two tiedown screws into the recess of the wear bushing. To do this, the glands must be first loosened by turning left hand with a 2-1/4" wrench approx. 2 turns. The tiedown screws can then be rotated right hand with a 3/4" wrench until they come into contact with bushing wall (approx 6 turns). Back off the tiedown screws 45º (1/8th turn) and re-tighten the glands to 250 ft.lbf.

6.0 Rotate running tool left hand approx. 90º to disengage from 'Breech' connection and retrieve tool.

Note: To ease rotation, some or all of the hang-off weight should be taken up by the elevators.

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