Formation pressure measurement while drilling utilizing a non-rotating stabilizer
CA 2278266 A1 · Owner: Schlumberger Technology Corporation · Inventors: Dorel, Alain P.; Ciglenec, Reinhart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A downhole tool and method are provided for collecting data from a subsurface formation during drilling operations. The tool includes a tubular mandrel adapted for axial, connection in a drill string positioned in a wellbore penetrating the subsurface formation and a, stabilizer element or sleeve positioned about the tubular mandrel for relative rotation between the, stabilizer element and the tubular mandrel. A plurality of elongated ribs are connected to the, stabilizer element. A means is connected to the stabilizer element for frictional engagement with, a wall of the wellbore so as to prevent the stabilizer element from rotating relative to the, wellbore wall. An actuator system …
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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 July 20, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2021.
- 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.