Prepare the Tree for Running

Steps 1-4 apply to TRT on IWOCS (surface controlled). Steps 5-14 apply only to ROV operated TRT (subsea controlled):

IWOCS-Operated TRT (surface controlled):

(1) Vent the gripper latch function.

(2) EXTEND the cylinder assemblies over the connector actuator rods by supplying pressure (4,270 psi max.) to the “tree connector lock”

function.

Note: Do not apply more than 500 psi to the Tree Connector Lock function if the tree is not landed on a stump; otherwise the tree connector can be damaged.

(3) Latch the grippers to the connector actuator rods by supplying 3,000 psi to the “gripper latch” function.

(4) UNLOCK the connector by supplying 3,000 psi to the “tree connector unlock” function. Verify the connector position markings.

CAUTION: Maintain unlock pressure while landing the tree.

ROV-Operated TRT (subsea controlled):

(5) Apply 500 psi on the supply line.

Note: Do not apply more than 500 psi to the Tree Connector Lock function if the Tree is not landed on stump; otherwise the tree connector can be damaged.

(6) Vent the Gripper Latch by turning the “GRP” valve to “V” position.

(7) Turn the “TREE” valve to “L” position to EXTEND the TRT gripper assemblies over the Tree connector actuator rods.

(8) Verify markings that indicate gripper assemblies in extended position.

(9) Bleed supply pressure and then turn the “TREE” valve to center position.

(10) Apply 3,000 psi on the supply line.

(11) LATCH the grippers to the connector actuator rods by turning the

“GRP” valve to “L” position.

(12) Turn the “GRP” valve to center position to block pressure in.

(13) UNLOCK the connector by turning the “TREE” valve to “U” position with pressure on the supply line. Verify the connector position markings.

(14) Turn the “TREE” valve to center position to block unlock pressure.

Bleed off pressure on supply line.

CAUTION: Observe gauge on “TREE” “U” side to verify that the Unlock pressure is maintained while landing the tree.

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6.5.2 Change Tree Gasket

-JHA- Perform JHA for tree lift and seal inspection.

(1) Remove the dummy stab from the GR receptacle and place into the parking holder.

(2) Install a Hot Stab with test line into the GR receptacle and apply up to 1,000 psi to the smaller diameter port to release the gasket.

(3) Hold pressure and lift the Tree. Verify the gasket is on the stump.

(4) Exchange the gasket on the stump.

(5) Carefully set the tree on the stump. Release pressure on the gasket retainer.

(6) Lift tree to verify that the gasket is in place.

(7) Inspect the seal (upper or lower, where applicable) on the isolation sleeve. Install a new one if necessary.

(8) Remove the hot stab from the GR receptacle.

6.5.3 Prepare the Tree for installation

(1) If required for relocation to moonpool, remove IWOCS RJP from tree.

(2) Verify that the bore protector was properly installed.

(3) Ensure that the Transfer Barrier fluid level is full.

(4) Open the GT and SCM valves and verify that all other tree valves are closed.

(5) Verify the connector secondary lockdown mechanism is properly tightened.

(6) Ensure pressure cap or crud cap in installed on the flowline hub and are ROV removable.

6.5.4 Install Tree Guidance Stab (Stinger) and Make up TRT to Drill Pipe

-JHA- Perform JHA for moonpool movements of the tree & drill pipe make-up to the TRT.

(1) Lift tree and move over the moon pool and land the tree on the four legs.

Note: Check the Heading to locate the tree over the moon pool.

(2) Vent the “Latch” function of the TRT and apply 3,000 psi to the

“Unlatch” function.

Note: Verify markings on two override rods that indicate the TRT is in the unlatched position.

(3) Vent the “gripper latch” function to release the connector rods.

(4) Remove TRT from Tree.

(5) Use the Stinger Lifting Cap to lower the Stinger into the Tree. See drawing SD-030423-07.

Note: For the configuration of the Stinger, see drawing SK-081275-01 and sheet 3 of SD-030423-07.

(6) Place the Central Guide Receptacle on the Spool top and rest the Stinger on it at the centralizer sleeve.

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(7) Remove the Lifting Cap.

NOTE: FOR SAFETY PURPOSE, SPECIAL CARE MUST BE TAKEN DURING THIS OPERATION.

(8) Pick up the TRT and make it up to the Stinger. Remove the Central Guide Receptacle.

NOTE: FOR SAFETY PURPOSE, SPECIAL CARE MUST BE TAKEN DURING THIS OPERATION.

(9) Re-install TRT to Tree (Section 6.3.9) and unlock the Tree Connector (Section 6.3.10). Perform TRT function test.

(10) Remove the Lifting sub from the top of the TRT.

(11) Send the crossover adapter (items 6 and 7 - See TRT latch tool) to the drill floor.

(12) Make up the TRT crossover adapter (mandrel and union nut) to weak link/drill pipe.

(13) Lower the drill pipe and crossover adapter through the rotary table and make it up to the TRT.

Note: Make up Torques (approximate): Union Nut - 300 ft-lb Set Screws - 80 ft-lb (14) Install the Transponder(s) on drill pipe, if applicable.

(15) Make up the weak link/drill pipe to the TRT.

(16) Remove the ladder and davit fall protection equipment from the tree.

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6.5.5 Tree Installation Checklist

SPOOL TREE STATUS PRIOR TO RUNNING SUBSEA

VALVE STATUS REMARKS / INITIALS

IMV CLOSED

BORE PROTECTOR INSTALLED AND LOCKED

FLOWLINE HUB DEBRIS/ROV CAP

INSTALLED

WELLHEAD GASKET REPLACED

ISOLATION SLEEVE NOSE SEAL INSPECTED OR REPLACED GASKET RELEASE (GR) DUMMY HOT

STAB INSTALLED IN PARKING

RECEPTACLE GASKET TEST (GT) DUMMY HOT

STAB INSTALLED IN PARKING

RECEPTACLE HOT STAB FROM TRT CONTROLS

(IF APPLICABLE) GT LINE MADE UP TO LARGE PORT, STOWED ON TRT

CONTROLS INSTALLED ON TRT

FLYING LEADS (HYDRAULIC OR

WELLHEAD SEAL ASSEMBLY LOCKED & TESTED

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TRT STATUS PRIOR TO RUNNING SUBSEA (SURFACE CONTROL IWOC MODE)

FUNCTION STATUS (GAUGE) REMARKS /

INITIALS

PRODUCTION BORE TEST FITTING (SIDE)-PLUGGED VERTICAL HOLE-PLUG REMOVED

TRT STATUS PRIOR TO RUNNING SUBSEA (CAMERON ROV PANEL, SUBSEA CONTROLS)

FUNCTION STATUS (GAUGE) REMARKS /

INITIALS

PRODUCTION BORE TEST FITTING (SIDE)-PLUGGED VERTICAL HOLE-PLUG REMOVED

COMPENSATOR BLIND STAB IN RECEPTACLE AND NEEDLE VALVE OPEN

CONTROL EQUIPMENT STATUS PRIOR TO RUNNING SUBSEA

EQUIPMENT STATUS REMARKS /

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6.6 Run and Test the Tree