Tubing hanger
CA 1237072 A · Owner: Vallet, Aldon J. · Inventors: Vallet, Aldon J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an apparatus including a tubing spool and tubing hanger which overcomes problems associated with servicing of oil and gas wells under pressure. In the invention, a tubing hanger can move through a tubing spool and be seated and sealed from the outside of the tubing spool. The tubing hanger includes a flexible packing element with means for engaging and expanding the element to seal the tubing hanger in the tubing spool and a plurality of locking means adapted to secure the tubing hanger in relation to the tubing spool.
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 May 24, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 24, 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.