Coherent detection system for use in induction well logging apparatus
CA 1260060 A · Owner: Halliburton Company · Inventors: Moore, Robert A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure In an induction logging system supported on a sonde, an improved received signal processing system is disclosed. The sonde supports transmitting and receiving coils. The transmitter sends pulses at a frequency F1 normally 20 kilohertz. The receiver includes a frequency multiplier circuit driven with a frequency F2. The multiplier forms an output to a phase sensitive detector driven by a gating signal F3 where F3 = F1 - F2. This reduces error arising in the receiver.
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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
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.