E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
166/51.4
E21B 33/038 (2006.01) E21B 17/06 (2006.01) E21B 23/00 (2006.01) E21B 23/02 (2006.01) E21B 33/12 (2006.01) E21B 43/10 (2006.01)
Patent
CA 1177389
-32- ABSTRACT OF THE DISCLOSURE There are disclosed two embodiments of an apparatus for releasably latching the lower end of a tubing string within the bore of an upstanding well conduit by means of latching parts adapted to be received in latching position beneath a shoulder in the bore of the well conduit. The latching parts are locked in latching position by locking means which is engageable and releasable in response to manipulation of the well string. The latching parts are moved into unlatching position, upon release of the locking means, without necessity of sliding contact between the latching parts and the shoulder. There are also disclosed two embodi- ments of a seal ring clamped within a groove about a stinger portion of the apparatus for sealably engaging the bore of the well conduit.
394222
Ava International Corporation
Swabey Ogilvy Renault
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