Automatic false rotary
CA 2695669 C · Owner: Weatherford/Lamb, Inc. · Inventors: Hayes, Michael; Thomas, Allen Keith, Jr.; Wiens, Jim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for remotely performing a pipe handling operation is provided. In one aspect the method and apparatus includes a false rotary table capable of supporting one or more tubulars during the pipe handling operation which is moveable between a position for landing one or more tubulars to a position for running one or more tubulars into a wellbore. In another aspect the present invention provides a method and apparatus for remotely connecting elevator links alternatingly between interchangeable elevators which are capable of axially engaging one or more tubulars above the wellbore.
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 September 20, 2004 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2026.
- 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.