High temperature well packer
CA 1237657 A · Owner: Hughes Tool Company · Inventors: Manderscheid, Phillip H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well packer is shown which is particularly suitable for use in high temperature well environments such as in, fire flooding and steam injection secondary recovery techniques. The well packer has a central mandrel which extends within an outer assembly, including a top body with an interior bore, which circumscribes the central mandrel. The central mandrel has an external flange region about a portion of the circumference, for contacting abutment members within the top body bore when the mandrel is rotated within the body, to transmit torque to the outer assembly. A seal element in the outer assembly moves radially outwardly between a retracted and extended configuration to sealingly …
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
- Granted June 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
- 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.