AVENUES FOR IMPROVEMENT

o Well Control Practiceso Rig Reliabilityo Downhole Tool Reliability

REASONS FOR NPTo Gas Kicko Rig Repairo MWD/LWD Failures

TIME DISTRIBUTION, DAYS END OF WELL

Total Time 92.6NPT 21.2Total Time less NPT 71.4% NPT 23%

NEWBURN H-23D-377

Hole Problems5%

Rig Related26%

Downhole Tool Failure

23%

Well Control41%

Others5%

Deep Water High Complexity

AVENUES FOR IMPROVEMENT

o Well Control Practices and Well Integrityo Rig Reliabilityo Drill Pipe Insepction and Drilling Practices

REASONS FOR NPTo Well Losses and Kick Controlo Rig Repairo Drill Pipe Wash Outso Low Casing Shoe LOT

TIME DISTRIBUTION, DAYS END OF WELL

Total Time 129.6NPT 47.4Total Time less NPT 82.1% NPT 37%

ANNAPOLIS G-24D-378

Hole Problems11%

Rig Related26%

Downhole Tool Failure

15%

Well Control42%

Stuck Tools and Fishing

6%

Deep Water High Complexity

Hole Problems27%

Rig Related9%

Downhole Tool Failure

27%

Well Control23%

Milling and Fishing

9%

WOW1%

Misc4%

AVENUES FOR IMPROVEMENT

o Casing and Primary Cementing Designo Downhole Tool Reliability

REASONS FOR NPTo Cement squeeze 298 mm casing shoeo Leaking Casing Running Toolo Leaking Expandable Liner Topo Stuck Pipe through well control

TIME DISTRIBUTION, DAYS END OF WELL

Total Time 204.0NPT 67.7Total Time less NPT 136.3% NPT 33%

WEYMOUTH A-45D-391

Deep Water High Complexity

AVENUES FOR IMPROVEMENT

o Wellbore integrity evaluationo Downhole Tool Reliabilityo Rig Reliability

REASONS FOR NPTo Loss Circulation and Hole Instabilityo Downhole Tool Failureo Surface Equipment Failures

TIME DISTRIBUTION, DAYS END OF WELL

Total Time 96.0NPT 13.5Total Time less NPT 82.5% NPT 14%

CRIMSON F-81D-394

Hole Problems50%

Rig Related22%

Downhole Tool Failure

28%

Deep Water High Complexity