Casing hanger
CA 1196573 A · Owner: Bralorne Resources Limited · Inventors: Johnson, Clarence W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A casing hanger for hanging well casing and sealing the well pressure from the atmosphere. The casing hanger comprises a cooperating slip and slip bowl adapted to grip and retain the well casing when they abut a cooperating shoulder on the casing head whereupon the casing hanger will be in its operating position. A seal is adapted to be compressed when the casing hanger is moved downwardly and forms the seal when the casing hanger reaches its operating position. A manually adjustable bolt can increase or decrease the seal pressure without disturbing the well casing.
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 November 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2002.
- 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.