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US 2015/0021038 A1Published application
Pre-positioned capping device on high pressure wells
AssigneeConocoPhillips Company
InventorsRandall S. SHAFER, Gordon T. POSS
Life of this patent
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Abstract
Systems and methods contain fluids discharged from a subsea well or at the surface by capping the well blowout with a pre-positioned capping device. The capping device includes at least one blind shear ram and is separate from a blowout preventer. The blowout preventer may operate to control well events up to a certain pressure, above which the capping device is employed since the capping device has a higher pressure rating than the blowout preventer.
Claims20
A staged pressure control system attached to a wellhead of a well, comprising:
- a blowout preventer stack having a first pressure rating;
- and
- a pre-positioned capping device having a blind shear ram disposed between the wellhead and the blowout preventer stack to close the well and a second pressure rating higher than the first pressure rating.
A method of controlling a well, comprising:
- disposing a pre-positioned capping device between a wellhead of the well and a blowout preventer stack having a first pressure rating;
- drilling the well through the capping device and blowout preventer stack;
- operating the blowout preventer stack to control well events up to a pressure limit;
- and
- controlling a blind shear ram of the pre-positioned capping device having a second pressure rating higher than the first pressure rating in order to close the well if the well event is greater than the pressure limit.
2 more elements
Dependencies are inferred from the claim text.