Bottom hole drilling assembly
CA 2136559 C · Owner: Camco International Inc. · Inventors: Moore, Brian Keith; Pringle, Ronald Earl; Morris, Arthur John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A bottom hole drilling assembly connectable to coiled tubing comprises a downhole motor to rotate a drill bit an articulated sub for causing the drill bit to drill a curved bore hole when a second portion thereof is bent from coaxial orientation with a first portion a steering tool for indicating the attitude of the bore hole a thruster for providing force to advance the drill bit and an orientating toot for rotating the thruster relative to the coiled tubing and thereby rotating the articulated sub so as to control the path of the bore hole.
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 November 24, 1994 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 24, 2016.
- 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.