Simplified xmas tree using sub-sea test tree
CA 2232014 C · Owner: Morgan, Michael Graham · Inventors: Edwards, Jeffery Charles; Morgan, Michael Graham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved sub-sea xmas tree (10) is disclosed which consists of a wellhead connector (12), a cylindrical structural housing (14) and a tree cap (16) mounted on top of the housing (14). A dual bore sub-sea completion test tree (20) is disposed in the housing (14) and it has a main production bore (22) with series ball valves (26, 28) for controlling fluid flow in the production flow path and an annulus bore (24) with a ball valve (30) therein. The ball valves are independently and remotely actuatable by a remotely operated vehicle (ROV) override system to control communication through the xmas tree (10) and to comply with various regulatory standards. A cross-over valve (82) is …
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, 1996 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 2018.
- 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.