Pumping method and system for oil wells
CA 2480237 C · Owner: Ifp Energies Nouvelles · Inventors: Wittrisch, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an effluent pumping method and system comprising: -pumping means comprising a rotor and a stator; -the rotor being fastened by a first end to a tubular driving string; -means for driving the string into rotation; a riser comprising at least one orifice is fastened to the rotor at the second end thereof the rotor comprising a line which communicates the inner space of the driving string with the inner space of the riser.
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 September 13, 2004 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 13, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2026.
- 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.