Whipstock, running/retrieval tool and a system for tieing back a liner from a wellbore casing
CA 2705595 A1 · Owner: George, Grant E.E. · Inventors: Begg, Stephen M.; George, Grant E.E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A whipstock, a running/retrieval tool and a system for tieing back a liner from a well bore casing are disclosed. The whipstock comprises a main body having an outer surface, a sloping face portion having a slope angle and an extension formed on such that the diameter of the extension is greater than the diameter of the main body. The running/retrieval comprises a housing including a retractable latch biased radially outwardly from the tool formed to fit within a slot formed on a downhole tool. The system for tieing back a liner from a well bore casing comprises a well bore casing including a window opening defined by edges, the edges including beveled portions and a tieback …
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 April 27, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 27, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 2021.
- 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.