Deployable mandrel for downhole measurements
CA 2700299 C · Owner: Weatherford/Lamb, Inc. · Inventors: Gysling, Daniel L.; Ferguson, Stuart E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The disclosed apparatus comprises a phase fraction meter and a compliant mandrel deployable within a production pipe and may further comprise a flow velocity meter. The mandrel allows the determination of the phase fraction for a fluid comprising three phases by providing an additional cross sectional compliance within the conduit thereby allowing the density of the fluid to be determined. The mandrel also provides a specified blockage through the flow velocity meter thereby increasing flow velocity through the meter. This allows flow rate measurements in conditions under which flow velocity in the under- restricted cross--sectional area of the pipe would normally be very low. Further the …
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 8, 2004 and granted February 19, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2026.
- 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.