Method and apparatus for disabling detonation system for a downhole explosive assembly
CA 2087628 A1 · Owner: Haliburton Company · Inventors: Klein, Dieter; Burleson, John D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus adapted to disable the actuation assembly for a perforating gun or any other detonation device used in subterranean wells to prevent premature surface detonation of the device. An apparatus is provided which can be quickly and easily connected in a tubing string intermediate the firing head and the perforating gun or other detonation device. In a preferred embodiment the invention, comprises a cylinder and firing piston combination wherein a chamber is provided between the cylinder wall and the firing piston. The chamber contains a transition material such as, an eutectic alloy. The transition material changes state from a solid to a fluid when the temperature 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 20, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 20, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 20, 2015.
- 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
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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.