Downhole anti-rotation tool
CA 2264467 C · Owner: Doyle, John P. · Inventors: Tessier, Lynn P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tool is provided for preventing the rotation of a downhole tool or rotary pump stator the tool comprising a tubular housing and a jaw which pivots radially outwardly from the tool upon tool rotation to engage the casing wall for arresting tool rotation and providing significant stabilization of a rotary pump. In doing so the tool housing moves oppositely to rest against the casing opposite the jaw. The tool housing and the downhole tool are thereby restrained and stabilized by the casing wall. The tool's jaw is released and is stowed adjacent the housing by opposite tool rotation. Preferably the profile of the jaw allows it to stow closely against the housing for presenting minimal …
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 March 5, 1999 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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.