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