Device for handling down-hole pipes
CA 2060123 A1 · Owner: Ferguson, Andrew · Inventors: Ferguson, Andrew; Ballantyne, Ronald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Machinery on a drill rig displaces a down-hole pipe from a horizontal orientation proximate to a drill floor to a suspended vertical orientation immediately above the drill floor. The machinery includes a guide and a wheeled carriage that travels along the track. The carriage has a swivel that pivots about a vertical axis. A pipe clamping mechanism is connected to theswivel with a pivot joint for pivoting about a generally horizontal axis. An elevator displaces the carriage downwardly to locate the clamping mechanism about one end of a pipe. The elevator then raises the pipe end until the pipe issuspended above the drill floor. A hydraulic cylinder acting between the swivel and the clamping …
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 January 28, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2014.
- 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.