Long gauge roller vane drilling motor
CA 2396532 A1 · Owner: Ultidrill B.V. · Inventors: Grupping, Arnold Willem Josephus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A single-jacket roller vane drilling motor for downhole deviated and horizontal drilling has its jacket (9) provided at its circumgerence with one or more curved members (10) in such a way that a new larger circular outside , surface (11) is created with a diameter approximately equal to that of the drill bit below, and whereby one or more longitudinal recesses (7') are created for passage of the drilling fluid back to the surface. The curved members (10) may start below the lower end of the motor or at its lower end and may or may not extend to its upper end.
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 6, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 6, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 6, 2022.
- 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.