Pumping system with downhole liquid from gas separation
CA 2102770 C · Owner: Sandoval, Jose Luis · Inventors: Rivas, Olegario; Sandoval, Jose Luis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A well pumping system for pumping a fluid having a liquid and a gas is disclosed which system includes a well casing and a production tube set within the well casing so as to define an annular space between the production tube and the well casing the production tube including a shoe comprising a hollow tubular article having a substantially cylindrical wall defining a first flow passage, a second flow passage being formed within the wall of the shoe, the first flow passage having a first inlet for the liquid and a first outlet to the annular space the second flow, passage having a second inlet for the gas and a second outlet to the production tube, whereby the liquid is produced through the …
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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 November 9, 1993 and granted September 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2015.
- 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.