Apparatus and method for stabilized downhole drilling motor
CA 2255288 C · Owner: National Oilwell Varco, L.P. · Inventors: Crooks, Jay Cameron Adam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved apparatus and method for boring a hole through an earthen structure in vertical deviated or horizontal planes using an articulating downhole drilling motor with a squared triangulated or tapered spiral helixical housing for the body of the power section of the said downhole drilling motor. The said apparatus improving the stabilization of the entire downhole drilling motor at a position anterior to the drill bit. The proximity of stabilization being anterior substantially increases the probability of the drill bit to remain on the desired and planned course or trajectory.
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 December 14, 1998 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 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.