All reports
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Vibration challenges in top-hole drilling
Severe drilling vibrations in top-hole section created unacceptable noise and risk. An AST was implemented to…
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Under-reaming a difficult, fractured formation
A troublesome formation known to lock-up the cutters and cause twist-offs was to be drilled with…
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Drilling long, fast laterals for unconventional shale resources
Drilling, shale, play, unconventional, lateral, Permian, Eagle Ford The drilling of long laterals for unconventional resources…
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Replacing limiting drill-bit features by AST
Torque arrestors and other features are added to reduce vibrations and to keep PDC drill bits…
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Improving deepwater efficiency
Deepwater exploration from large drillships is on the rise. These vessels offer great benefits in terms…
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AST and PDC Replaces Turbine in Hard Sandstone
Objectives The primary objective was to maximise drilling efficiency in the 5 5/8” section through the…
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Challenging Coring
Some wells are drilled primarily to retrieve cores. This puts a lot of pressure on the…
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Kvitebjørn – HPHT Cool Down
High temperature, high pressure wells are always demanding. One obvious challenge is to keep the mud…
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Improved Productivity in Rough Seas
The AST saved at least on day on each section drilled compared to previous wells having…
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Total Egypt
The campaign needed extensive under-reaming and caused concerns over vibrations and long bit trips. Objective The…