Method and apparatus to vibrate a downhole component by use of acoustic resonance
CA 2372366 A1 · Owner: Zheng, Shunfeng · Inventors: Jeffryes, Benjamin P.; Zheng, Shunfeng
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus of vibrating a tubing string in a wellbore comprises a rigid, carrier or conveyance structure coupled to an acoustic resonance apparatus. The acoustic, resonance apparatus comprises a housing section containing a fluid. A pulser or other device is, activated to generate acoustic waves in the fluid. A portion of the acoustic wave energy is, reflected by a reflector in the acoustic resonance apparatus. The operating frequency of the, pulser or other device is adjusted to achieve acoustic resonance in the fluid.
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 20, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 20, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 20, 2024.
- 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.