Downhole adjustable bent assemblies
CA 2060448 A1 · Owner: Schlumberger Canada Limited · Inventors: Askew, Warren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with an illustrative embodiment of the present invention a downhole, adjustable apparatus for creating a bend angle in a drill string includes a mandrel mounted for rotation between first and second angular positions within a housing the mandrel being, telescoped into the housing on an axis that is inclined with respect to the principle axial centerline of the housing, so that in one rotational position of the mandrel the housing is axially aligned with the centerline Of a drilling motor and in another rotational position that is 180° from the initial position the housing is slightly inclined with respect to the centerline of such drilling motor to establish a bend angle. …
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 January 31, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 31, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2014.
- 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.