Acoustic system and method for performing operations in a well
CA 2102956 C · Owner: Schultz, Roger L. · Inventors: Schultz, Roger L.; Holloman, Ricky M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for performing operations in an oil or gas well (such as flow testing) can operate a plurality of downhole apparatus via one downhole acoustic receiver and one controller or via one downhole acoustic receiver and a respective controller for each downhole apparatus or via one acoustically actuated downhole apparatus sending an acoustic control signal to another downhole apparatus. A corresponding method is also disclosed.
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 November 12, 1993 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 12, 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.