Internal riser rotating control head

Details Internal riser rotating control head Internal riser rotating control head

E - Fixed Constructions

21

B

E21B 7/12 (2006.01) E21B 21/00 (2006.01) E21B 21/08 (2006.01) E21B 33/038 (2006.01) E21B 33/08 (2006.01)

Patent

CA 2446984

A system and method provides a holding member for releasably positioning a rotating control head assembly in a subsea housing. The holding member engages an internal formation in the subsea housing to resist movement of the rotating control head assembly relative to the subsea housing. The rotating control head assembly is sealed with the subsea housing when the holding member engages the internal formation. An extendible portion of the holding member assembly extrudes an elastomer between an upper portion and a lower portion of the internal housing to seal the rotating control head assembly with the subsea housing. Pressure relief mechanisms release excess pressure in the subsea housing and a pressure compensation mechanism pressurize bearings in the bearing assembly at a predetermined pressure.

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