Reuseable cutting and milling tool
CA 2314622 A1 · Owner: Baker Hughes Incorporated · Inventors: Davis, John Phillip; Lynde, Gerald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tool for milling or cutting tubular members downhole in a well having a, plurality of pivotable blades pivoted upwardly by upward movement of a hollow cylindrical hydraulic; piston within the tool body. The piston wall is directly below, and aligned with the blade minimizing the diameter of the tool. A fluid telltale is, provided to indicate the extent of deployment of the blades. The blades can be withdrawn by driving the piston downwardly.
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 July 27, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2022.
- 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.