Short hop communication link for downhole mwd system
CA 2107576 C · Owner: Develco, Inc. · Inventors: Barron, Charles Dwain; Rorden, Louis H.; Dailey, Patrick E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The short hop communication link includes a sensor module (125) positioned downhole , from a motor (100) in a well. The module (125) includes sensors that monitor operational, directional and environmental parameters downhole and provide an electrical data signal, indicative thereof. Sensors may also be positioned in the drill bit (50) for obtaining parameters, related to the bit and communicating data signals reflecting the sensed parameters to the, sensor module (125). The sensor module (125) includes a transceiver with an , annular antenna, (25), for transmitting electromagnetic sensor data signals to a point above the motor (100). A control module (40) which also includes a …
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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 17, 1992 and granted April 10, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 17, 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.