Subsea wellhead apparatus

Details Subsea wellhead apparatus Subsea wellhead apparatus

1985-09-04

1986-12-30

Novosad, Stephen J.

Wells

Submerged well

Wellhead

166 975, E21B 712

Patent

active

046321888

ABSTRACT:
An improvement in a subsea wellhead apparatus that includes the conventional plurality of strings of conduit suspended in a borehole penetrating subterranean formations below the bottom of a sea at which the wellhead apparatus will be placed and the conventional wellhead and accessories disposed above the bottom and the plurality of strings of conduit; the improvement comprising a first communications aperture communicating with a first annular space intermediate a desired pair of conduit strings; a sealed conduit that defines a sealed path of flow for flowing a fluid waste into the annulus intermediate the respective conduit strings; remotely operable high pressure control valves interposed in the conduit for controlling the flow of fluid between the annular spaces and a remote control for controlling the flow control valves so as to route the fluid waste to the first annular space and fractured formation communicating therewith.

REFERENCES:
patent: 3536344 (1970-10-01), Nelson
patent: 3545541 (1970-12-01), DeVries
patent: 3885623 (1975-05-01), Watkins et al.
patent: 4475600 (1984-10-01), Cegielski et al.

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