Method and apparatus for controlling a well pumping unit
CA 1294022 C · Owner: Delta-X Corporation · Inventors: Mckee, Fount Eugene
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A method of maintaining a substantially constant amount of filling of a liquid well pump actuated by a polished rod which is reciprocated by a prime mover. The load and position of the polished rod is periodically measured to determine the amount of filling of the pump. The change in the amount of filling of the pump of one pumping cycle relative to a previous pumping cycle is compared and the speed of actuation of the pump is varied as a function of the change in the amount of filling of the pump to maintain a substantially constant amount of filling of the pump. The pump is continuously actuated but the speed is varied for preventing the well from being pumped …
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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
- Granted January 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 7, 2009.
- 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.