Gas hold up tool for use in cased well boreholes
CA 2090394 C · Owner: Schnoor, Christopher Allen · Inventors: Gartner, Michael Leonard; Sinclair, Paul L.; Schnoor, Christopher Allen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
For use in a well producing mixed phase fluids and flowing up the cased well, a device for measuring the gas hold up fraction is disclosed. Briefly a low energy gamma ray source irradiates the flowing fluid and counts are measured by a detector crystal. The metal casing shields the formations from the gamma radiation so that the detector response is determined primarily by the mixed phase fluids flowing in the well. By calibration, gas/liquid ratios can be measured for specific diameter casing.
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 February 25, 1993 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2015.
- 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.