Submerged actuator

Details Submerged actuator Submerged actuator

1988-05-12

1989-09-26

Arola, Dave W.

Pipe joints or couplings

With assembly means or feature

Particular tool-engaging means or with tool

285315, 285910, F16L 3500

Patent

active

048695351

ABSTRACT:
A well structure which includes a well housing having an upwardly facing internal shoulder and an internal recess below the shoulder, a tieback adapted to be landed on said housing internal shoulder and having an upper internal surface and a smaller lower internal surface with a shoulder therebetween, an actuator sleeve having an upper outer portion fitting closely within the upper internal surface of the tieback, a lower outer portion fitting closely with the lower internal surface of said tieback, a downwardly facing external shoulder between said lower and upper outer portions and a lower tapered surface tapering downwardly and inwardly, latch elements having upper and outer tapered surfaces mating with the lower tapered surface on said actuator sleeve, and a pressure compensating material position in the annulus between said shoulders and the upper internal surface of said tieback and the lower outer portion of said actuator sleeve so that downward movement of said actuator sleeve within said tieback is not prevented by the trapping of liquid within said annulus.

REFERENCES:
patent: 3393926 (1968-07-01), Arnold
patent: 3510153 (1970-05-01), Newton
patent: 4049297 (1977-09-01), Reneau
patent: 4453745 (1984-06-01), Nelson
patent: 4662663 (1987-05-01), Schmitz

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