Hydraulically releasable coupling
CA 2245947 A1 · Owner: Transocean Asa · Inventors: Bakke, Stig
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hydraulically releasable coupling (1) of the kind arranged to releasably connect a tool to a coiled tube, and which coupling (1) is provided with two or more hydraulic channels (12, 14) and (13 15), arranged to convey hydraulic , fluid from hydraulic lines arranged in the coiled tube, to the tool; and in which the coupling (1) is held in coupled position by a locking device (4) which is secured by means of an axially displaceable sleeve (6) which again , is fixed in locking position by shear pins (11). The sleeve (6) is arranged to work as a sleeve-shaped hydraulic piston the sleeve (6) being provided with , annular seals (7 8, 9) of different seal diameters, whereby the seals (7 8, 9) …
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 February 5, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2019.
- 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.