Oil lift system
CA 2300267 A1 · Owner: Strickland, Charles · Inventors: Strickland, Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wellhead assembly including a skid, drum cable spooled on the, drum and level wind mechanism is set forth to extend the cable into and out of a well borehole for production of a well The cable spools over a measuring wheel extends into the well and supports a bail on the end of it. The bail has foot valve for filling thereby enabling retrieval of a bail into a surface located stinger connected with an air pump to force liquid from the bail. A control system enables cyclic operation.
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 March 7, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2022.
- 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.