Apparatus and methods for drilling a wellbore using casing
CA 2808302 C · Owner: Weatherford/Lamb, Inc. · Inventors: Alkhatib, Samir; Terry, Jim; Odell, Albert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus and methods for drilling with casing. In an embodiment methods and apparatus for deflecting casing using a diverter apparatus are disclosed. In another embodiment the apparatus comprises a motor operating system disposed in a motor system housing a shaft operatively connected to the motor operating system the shaft having a passageway, and a divert assembly disposed to direct fluid flow selectively to the motor operating system and the passageway in the shaft. In another aspect methods and apparatus for directionally drilling a casing into the formation are disclosed. Methods and apparatus for measuring the trajectory of a wellbore while directionally drilling a casing into the …
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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 February 2, 2004 and granted May 23, 2017. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2026.
- 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
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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.