Oilfield tubular torque wrench
CA 2661394 C · Owner: Canrig Drilling Technology Ltd. · Inventors: Hunter, Douglas A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for measuring applied torque of a oilfield tubular torque wrench the oilfield torque wrench being operable to torque a tubular about an axis of rotation and the oilfield torque wrench including a lower tong including a recess through which the axis of rotation passes during operation; an upper tong including a recess the upper tong being mounted above the lower tong with the recess of the upper tong positioned above the recess of the lower tong so that the axis of rotation passes therethrough; pipe gripping dies in the recesses of the upper tong and the lower tong; a swivel bearing between the upper tong and the lower tong permitting the upper tong and the lower tong to swivel …
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 August 24, 2006 and granted June 12, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2026.
- 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.