Wells – Expansible anchor or casing – Expansible means translated by wedge or cam
Patent
1975-10-31
1977-08-23
Leppink, James A.
Wells
Expansible anchor or casing
Expansible means translated by wedge or cam
166154, 251319, E21B 2300
Patent
active
040433927
ABSTRACT:
A well system for selectively locking well tools along a flow conductor in a well bore and a tool string for use in the flow conductor including a locking mandrel, a sleeve shifting device, and a well safety valve. The selective locking system has a landing and locking recess profile including both upwardly and downwardly facing stop shoulders. One form of the locking system is in a sliding sleeve valve including a cam release shoulder to free a selector and locking key when the sleeve valve is moved between spaced longitudinal locations. Another form of the locking system may be along a landing nipple and require that the well tool locked therein be disabled for release of the selector and locking tools. The sleeve shifting device has means for opening and closing the sliding sleeve valve including keys having upwardly and downwardly facing stop shoulders and recess profiles which are compatible with the landing and locking recess profile of the sleeve valve or of a landing nipple. The sleeve shifting device may be used also as a locking mandrel. Selectivity is provided by variation in the landing and locking profiles and the key profiles.
REFERENCES:
patent: 3606926 (1971-09-01), Schwegman
patent: 3845815 (1974-11-01), Garwood
patent: 3874634 (1975-04-01), Gazda
patent: 3948322 (1976-04-01), Baker
Garland H. Mathews
Leppink James A.
Otis Engineering Corporation
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