Wellhead sealing assembly
CA 1258621 A · Owner: Cameron Iron Works, Inc. · Inventors: Copley, Kelly S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealing assembly having application for sealing between wellhead housing and a casing suspended therein and including a base ring with an upper surface having inner and outer shoulders and an annular recess therebetween, a first energizing ring with a shoulder facing the base ring inner shoulder, a projection to extend into the annular recess and upper lugs with tapered upper surfaces; a second energizing ring surrounding the first ring projection with slots to receive the first ring lugs a, lower surface facing the base ring outer shoulder and upper tapered surfaces; an inner seal ring between the base ring inner shoulder and the first ring shoulder; an outer seal ring between the base …
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 August 22, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 22, 2006.
- 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.