Hydraulically actuated releasable connector and method for setting oil well liner
CA 2067227 A1 · Owner: Mims, Michael G. · Inventors: Mueller, Mark D.; Ehlinger, Jeffry C.; Mims, Michael G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hydraulic setting and release tool (10) has a shear out setting assembly (12) attached to a string coupling member (14). Upon reaching a predetermined hydraulic pressure a piston (20) of the, tool (40) shears restraining shear pins (22) and moves in a body of the tool to release dogs (15) that engage the coupling member (14). When the dogs (15) release, springs (16) retract the dogs (15) from engagement in sockets (34) of the coupling member (14) and the shear out setting assembly (12) separates from the coupling member (14). When used in running in a liner the coupling, member is a running head (14) that rotates the liner during running in and cementing. When used as a drill string …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 8, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.