Downhole rate of penetration sensor assembly and method
CA 2499159 C · Owner: Schlumberger Canada Limited · Inventors: Downton, Geoffrey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and apparatuses to determine the rate of penetration of a subterranean drilling assembly into a formation are disclosed. The methods and apparatuses generate rate of penetration by integration axial acceleration data with respect to time and applying a correction factor. The correction factor meant to account for the effect of gravity on the acceleration data is determined when rotational velocity of the drilling assembly relative to the formation is zero.
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 March 2, 2005 and granted May 15, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 2, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.