Surface wellhead

Details Surface wellhead Surface wellhead

1988-11-21

1990-07-03

Neuder, William P.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166352, 166368, E21B 712

Patent

active

049382896

ABSTRACT:
A casing installation system usable with tubular casing having an upper end portion and a lower portion, for anchoring the upper end portion of the casing on an outer casing string secured to a wellhead having a housing, the wellhead housing being positioned at a fixed position over a well, said casing extending upwardly to the wellhead from a location in the well at which location the lower portion of the casing is landed, the upper end of the casing being terminated by a generally annular casing hanger secured to the casing, said outer casing string having an upwardly-facing shoulder, the system also having a locking ring located on the casing hanger and movable thereon in a direction towards the lower end portion of the casing, the locking ring having means for preventing its movement on the casing in a direction away from the lower end portion of the casing in response to a force exerted on the locking ring in said direction away from the lower end of the casing, the locking ring having a downwardly-facing shoulder engageable with the upwardly-facing shoulder on the outer casing string.

REFERENCES:
patent: 3791442 (1974-02-01), Watkins
patent: 4408783 (1983-10-01), Gruller
patent: 4465134 (1984-08-01), Wakins
patent: 4557332 (1985-12-01), Denison et al.
Drawing SK 6968, Cameron Iron Works, Houston, Tex.

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