Coiled tubing set inflatable packer, bridge plug and releasing tool therefor
CA 2059573 A1 · Owner: Haliburton Company · Inventors: Maclaughlin, Scott T.; Lubitz, Eric P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A coiled tubing set inflatable packer bridge plug and, releasing tool therefor. The packer and bridge plug comprise an adapter With a mandrel slidably disposed therein. A pressure actuated piston releases a locking ball between the mandrel and adapter during an inflation cycle and allows movement of the mandrel such that the locking ball again locks the mandrel and adapter when the mandrel is moved to a sealed position wherein the inflatable packer element is sealingly closed. The inflatable packer of the present invention comprises a valve for opening a central passageway through the packer. A J-slot in the packer allows a plurality of inflation cycles to insure proper setting of the …
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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 January 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2014.
- 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.