Adjustable mandrel well casing hanger
CA 2069077 C · Owner: Fmc Corporation · Inventors: Smedley, Marcus A.; Miller, John H.; Rountree, Kenneth G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a threecomponent adjustable mandrel easing hanger assembly that can be attached to the upper end of a tie-back sub or string to effect a tensioned connection between the mudline and a surface located wellhead of an offshore well. A variable length hanger neck facilitates extension of the hanger body to a position above the mandrel where a packoff can be installed to provide a seal of the annulus between the hanger and the wellhead, regardless of the actual position of the hanger body with respect to the wellhead.
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
- Filed May 20, 1992 and granted September 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 20, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2014.
- 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.