Flow responsive time delay pump motor control logic
CA 2272269 A1 · Owner: Pro Cav Technology, L.L.C. · Inventors: Rasmuson, Gordon L.; Pigue, Paul; Husain, Zaki D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatically controlled fluid flow responsive method and apparatus for achieving speed, control or de-energization of an electric motor operatively connected with a downhole pump being, connected to a production tubing string of a well when flow from the downhole pump becomes, abnormally low. A selective electronic motor control signal is programmed representing a selected, minimum acceptable rate of discharge flow from the downhole pump. A flow transducer measuring, flow through a pump discharge line provides an electronic flow related signal to the logic circuitry, representing actual pump discharge flow which if below a predetermined value, initiates a preset timing sequence of …
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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 May 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2021.
- 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.