Conduit sealing system
CA 1109784 A · Owner: Baker International Corporation · Inventors: Amancharla, Amareswar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seal system is provided with a series of annular seal assemblies separated by relatively rigid spacing members and may be preferably adapted to selectively sealing engage a packer apparatus within a well bore conduit, during the completion or work over of a subterranean oil or gas well. Preferably each seal assembly, comprises four annular seal members in sequence. The outermost seal members are formed from a thermoplastic polymer having a coefficient of expansion greater than that of the rigid spacing members and the conduit, with physical resistance to corrosive chemicals and high temperature and pressure environments. The outermost member has a physical hardness sufficient to withstand …
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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
- Granted September 29, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 29, 1998.
- 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.