Apparatus for vibrating a pipe string in a borehole
CA 1319675 C · Owner: Worral, Robert Nicholas · Inventors: Worral, Robert Nicholas; Stulemeijer, Ivo Petrus Jozef Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for vibrating a pipe string in a borehole is provided the apparatus comprising means for generating at a downhole location lingitudinal vibrations in the string in response to flow of fluid through the interior of said string said means for, generating vibrations comprising a hydraulic motor of the moineau type having a stator part and a rotor part the stator part forming, part of the string and the rotor part being coupled to a percussion device which longitudinally moves the rotor part relative to the stator part in an oscillating manner during the course of each rotation of the rotor part relative to the stator part. The percussion device consists of a pair of percussion …
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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
- Granted June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.