Split stack blowout prevention system

Patent · Tue Mar 18 00:00:00 EST 1980

OSTI ID:5705526

Crager, B L; Ray, D R; Steddum, R E

A blowout prevention system for an offshore structure positioned on the underwater bottom in a body of water which contains moving ice masses that could force the structure off location wherein a surface blowout preventer stack for conventional well control is connected to the upper end of a riser with the lower end of the riser being disconnectably connected to a subsurface blowout preventer stack which provides the necessary well control should the structure be forced off location. The subsurface stack is positioned on a wellhead located in a chamber in the subsea bottom and is disconnectably connected to the riser so that the riser may be quickly removed from the subsea bottom should the structure be forced off location.

• Assignee: Chevron Research Co
• Patent Number(s): US 4193455
• OSTI ID: 5705526
• Resource Relation: Patent File Date: Filed date 14 Apr 1978; Other Information: PAT-APPL-896264
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
42 ENGINEERING
ARCTIC REGIONS
OFFSHORE OPERATIONS
BLOWOUT PREVENTERS
CONTROL SYSTEMS
OIL WELLS
WATER POLLUTION CONTROL
UNDERWATER FACILITIES
ICEBERGS
MARINE RISERS
CONTROL
ICE
PIPES
POLAR REGIONS
POLLUTION CONTROL
WELLS
020900* - Petroleum- Environmental Aspects
020300 - Petroleum- Drilling & Production
423000 - Engineering- Marine Engineering- (1980-)