Well operated electrical pump suspension method and system
CA 2063077 C · Owner: Camco International Inc. · Inventors: Dinkins, Walter R.
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 coil tubing electrical power cable system is used to electrically drive a pump in an oil and/or water well. The cable is an insulated electrical conductor enclosed in a low tensile strength corrosion-resistant metal tubing The tubing has the tensile strength to support the tubing in the electrical conductors. Separate retrievable support means are attached to the motor for supporting the motor and pump in the well. The motor and pump are lowered and set by the support means and the support means is then disconnected and retrieved and is not required to be corrosion-resistant.
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 13, 1992 and granted April 5, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2014.
- 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.