Hydraulic submersible pump for oil well production
CA 2260518 C · Owner: Cunningham, Edmund C. · Inventors: Cunningham, Edmund C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A flow control assembly is provided for a submersible pump drive which has a hydraulic, drive motor and a bearing pack for sealing a drive shaft which transfers drive from the, drive motor to an oil well pump. The flow control assembly incorporates a production, containment device for engaging said bearing pack. The production containment device, has a collar for supporting the bearing pack drive shaft and hydraulic drive , motor within the submersible pump drive, and a passageway through the collar for channeling fluid, therethrough. The flow control assembly further includes a seal protection device for, demountably engaging the bearing pack opposite the hydraulic drive motor. 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 January 28, 1999 and granted July 9, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 28, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 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.