Liquid level sensing for artificial lift control systems
CA 2203446 A1 · Owner: Brewer, James Robert · Inventors: Brewer, James Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The artificial lift control system utilizes a piggy back line flow computer, pressure transmitter, and software control to control artificial lift of wellbore fluids. The piggy back line is a medium to high pressure line strapped to the outside of the tubing. Supply, make-up gas or other fluids are pumped down the piggy back line at the lowest flow rate possible. Extremely low flow rates are utilized to minimize friction of flow in the piggy back line. A pressure or differential pressure transmitter is installed to monitor pressure on the piggy back line or to measure the differential pressure between the piggy back line and the casing pressure. The flow computer monitors pressures or …
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 April 23, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2019.
- 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.