Apparatus for handling a drilling equipment
CA 2019115 A1 · Owner: Mayer, James R. · Inventors: Mayer, James R.; Hisey, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for mechanically handling a drilling equipment comprising drill pipes, drill bits and drill guide bushings, the apparatus comprising clamping means mounted unpivotably about the drilling axis of the drill pipe relative to the carrier of the drilling device for clamping the drill pipe unrotatably; opening means positioned above the clamping means and arranged to be displaced for opening the drill pipe and to be withdrawn therefrom; an opening member provided in the opening means and arranged to be connected unrotatably to the drill pipe said opening, member being pivotable about a vertical opening axis relative to the opening means for rotating the drill pipe about the axis …
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 June 15, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 15, 2012.
- 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.