Acoustic devices to measure ultrasound velocity in drilling mud
CA 2506743 A1 · Owner: Molz, Eric B. · Inventors: Hassan, Gamal A.; Kurkoski, Philip; Molz, Eric B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method is disclosed for measuring ultrasound drilling mud velocity downhole in real time. One or more generated acoustical pulses are detected upon traversing two separate path lengths and ultrasonic velocity is , determined from differences in the pulses upon traversing their respective path lengths. Alternately, a single measurement can be made using an acoustic pulse traversing a specified path length. A transducer is discussed having a piezoelectric crystal, a backing material having matching impedance and a , facing material disposed between the crystal and the fluid having an impedance intermediate to crystal and fluid. A concave front face of the crystal …
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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 November 18, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 18, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 18, 2025.
- 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.