Device for performing a downhole operation
CA 2463610 A1 · Owner: Shell Canada Limited · Inventors: Lohbeck, Wilhelmus Christianus Maria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A downhole actuator (8) movable from a first configuration to a second configuration by the action of a selected increase of fluid pressure acting on the exterior of the actuator (8), and a tool arranged to be moved by the actuator so as to perform a downhole operation upon movement of the actuator from the first configuration to the second configuration thereof. The actuator (8) may comprise an atmospheric gas reservoir (24 88) and the tool may , comprise an expander (37) for tubulars or a fluid injector (90 81a).
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 October 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 23, 2024.
- 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.