Installation and levelling of subsea templates
CA 1203228 A · Owner: Sedco, Inc. · Inventors: Hampton, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Subsea drilling and foundation templates are lowered from a semi-submersible drill rig and levelled utilizing the drill string hoisting apparatus including a heave compensator suspended from the travelling block of the hoisting apparatus, a riser string suspensed from the heave compensator and connected to the template at substantially its center of gravity and further including a constant tension rotary drum air powered hoist supported on the riser string below the heave compensator and having a tension cable secured to a fixed reference point on the seabed such as one of the template supporting piles. The tension on the cable may be selectively adjusted to dampen the motion of the riser …
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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
- Granted April 15, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 15, 2003.
- 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.