LOADING OIL BASE MUD OR BASE OIL FROM SUPPLY VESSEL TO RIG Responsibility

1. OIM or Barge Engineer/Captain to be in charge of operation.

2. Tool pusher is to be responsible for rig related preparations. Assistant Driller and Derrick man are to assist the Tool pusher.

Preparations

1. OIM or Barge Eng./Captain to hole pre-transfer meeting with involved crew members.

2. Visually inspect transfer hoses for any damage immediately prior to transfer. Transfer hoses must be rated for hydrocarbon fluids and have a safe working pressure of 150 psi. Verify that the supply vessel's pumping pressure will not exceed safe working pressure of the hoses.

3. Transfer hoses have a valve on the end, at the supply vessel side, and has been checked for damage.

4. All others outlets on the load line are sealed off with a blind flange or a valve that is properly closed and padlocked (i.e., list specific valves).

5. Valves on sample outlets at each loading stations are closed.

6. Valves on all opposite side loading stations are closed and secured (i.e., padlocked).

7. Tool pusher and ExxonMobil drilling supervisor will verify that all preparations listed here-in have been made before here-initiathere-ing the transfer. Also, the Tool pusher and ExxonMobil drilling supervisor will ensure that the "checklist" is fully completed prior to commencing the operation. A copy of the completed "checklist" will be provided to the ExxonMobil drilling supervisor.

8. Transfer hoses will be visually checked for damage prior to transfer.

DRILLING FLUID SYSTEM

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9. Mud pits, shaker pits and shaker box have been emptied and cleaned out per mud engineer approval. All dump valves have been closed, secured, and tagged.

10. Main mud valve on overboard discharge line is closed and padlocked (specify valves).

11. Trip tank is to be cleaned out. The trip tank dump valves are to be closed and secured.

12. Overboard valves from the rig floor drain are closed and secured. Rig floor drains are lined up to drain tank.

13. Drains in pump room, mud treatment room, shaker room, mud mixing area, and cement room are sealed.

14. All valves to cement unit are closed. Dump valves from cement unit displacement and mixing tanks are closed and padlocked.

15. Isolation valves in mud pit room between OBM line and drill water line are closed and secured.

16. Main valve on sea water supply line and all water valves at mud pits, pump room, and shale shakers are closed and tagged.

17. Main diesel supply line valve has been closed, padlocked and tagged.

18. Transfer pumps are available for use in the event of a spill on the deck or to transfer at the pits.

19. Desander and desilter feed line manifold valves are closed and secured.

20. Valves on possum belly discharge are closed and secured.

21. Water flushing system on shakers screens are closed and secured.

22. Cuttings overboard gate in shale shaker cutting trough is sealed.

23. Cuttings transfer augers are operational.

24. Shaker bypass line to mud pits is closed.

25. Gumbo box bypass line is closed.

26. Gumbo box view hatch is sealed.

27. Cracks in rig floor are sealed with "Builders Foam".

28. Choke manifold discharge line is closed and tagged.

29. Large garbage bags are on rig if needed.

DRILLING FLUID SYSTEM

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30. Cutting boxes are on rig.

31. Absol is on rig.

32. Vacuum system is operational.

33. Extra personnel on rig for cutting handling as needed.

34. Drillpipe inside and outside wipers are on rig.

Communications

1. All involved rig and supply vessel personnel to have VHF radios.

2. One designated rig crew member to be assigned as lookout during the transfer to observe for leakage from the rig or supply vessel and to monitor transfer hoses.

3. Transferring of oil base mud should be done in daylight hours only, unless ExxonMobil operations superintendent approves a night transfer. Additional planning steps will be necessary to address problems that could be encountered with a transfer during darkness.

4. OIM, tool pusher, ExxonMobil drilling supervisor, mud engineer, mud logger and control room operator will be informed prior to the transfer of OBM.

Transferring

1. OIM or Barge Eng./Captain and the derrick man will double check line up from loading station to mud pits.

2. Work permit will be completed prior to the transfer.

2.a Cutting and welding permits are to be returned and put on hold until transfer of OBM or base oil is complete.

3. Connect transfer hose to supply vessel. OIM or Barge Eng./Captain to confirm with supply vessel captain that transfer hose connection flange is a proper mate to the flange on supply vessel.

4. Transfer is now ready to be started. The derrick man will monitor volume pumped and change over as required, opening valves on next pit to be filled before closing valve on pit just filled. Derrick man and mud loggers will monitor volume received periodically throughout the operation and upon completion of fluid transfer.

5. If any difference between volume pumped and volume received should occur, stop the transfer immediately. The tool pusher and ExxonMobil drilling supervisor are to be informed of the discrepancy and an investigation will be conducted to find the reason for the deviation. An acceptable solution to the problem will be implemented prior to continuing the operation.

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6. The mud engineer will perform quality checks of the transferred fluid periodically during the operation.

7. When transferring is completed, stop transfer pump and close valve on loading line in pit room. Close the valve at the loading station, the transfer hose must then be bled to the supply vessel. The valve on the end of the transfer hose at the supply vessel must be closed prior to disconnecting the hose from the flange on the vessel.

8. All mix lines, suction lines and transfer lines to the cement unit and trip tank are to be flushed. All water mud/oil mud interface from the flushing operation must be captured and pumped to a slop tank. After flushing, all valves are to be closed.

DISPLACING WATER BASE MUD FROM THE WELLBORE WITH OIL BASE MUD