Telescoping joint for use in a conduit connected to a wellhead and zone isolating tool for use therewith
CA 2216668 C · Owner: Haynes, Michael Jonathon · Inventors: Haynes, Michael Jonathon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A telescoping joint for use in a conduit connected to a wellhead and supporting downhole well tools to permit the downhole well tools to be axially displaced in the well bore without disconnecting the conduit from the wellhead is described. The telescoping joint is particularly useful in conjunction with an apparatus for providing an axially displaceable isolated fluid zone in a cased well bore which, is also described. The telescoping joint and the apparatus are used in conjunction for producing a predominance of a fluid of interest from a cased well bore which passes through a production zone that yields at least two fluids having different densities. The telescoping joint may also be …
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 September 23, 1997 and granted December 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 2019.
- 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.