Subsea riser disconnect and method
CA 2408807 A1 · Owner: Dore, Eddie E. · Inventors: Braddick, Britt O.; Dore, Eddie E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A subsea riser disconnect assembly (10) may be actuated from a drilling rig DR by axial movement of an upper riser (35) relative to a lower riser (28) for , disconnecting the upper riser (35) from the lower riser (28). A subsea riser valve assembly (20) may be actuated from the drilling rig DR by axial movement of the upper riser (35) relative to the lower riser (28) for sealing an , interior portion of the lower riser (28) and well bore WB below the subsea riser valve assembly (20). A drill pipe disconnect (30) may be actuated from a drilling rig DR, either onshore or offshore for disconnecting an upper , portion of drill pipe (236) from a lower portion of drill pipe (240). The drill …
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 May 7, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 7, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2023.
- 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.