Method and apparatus for radially drilling through well casing and formation
CA 2238782 C · Owner: Penetrators Canada, Inc. · Inventors: Peters, Alan D.; Mcqueen, Grant D.; Allarie, Michael M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for drilling holes in the steel casing of an a oil or gas well and drilling into the surrounding earth includes a number of components controlled by hydraulic fluid. A first hydraulic motor drives a steel milling assembly and a second hydraulic motor drives a rock drilling assembly. All assemblies are supported in a housing that is conveyed by conventional jointed pipe or coiled tubing down the well casing. Control components cause a carriage carrying the milling assembly to be indexed up a predetermined distance relative to the well casing and then extend a mill bit gradually into contact with the well casing while being rotated by a hydraulic motor. After the mill bit …
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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 27, 1998 and granted February 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2020.
- 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.