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Expired Canadian patentCanada

Deepwater floating drilling and production facility incorporating flexible production risers

CA 1294495 C · Owner: Conoco Inc. · Inventors: Hunter, Andrew F.

CIPO record

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Abstract From the Canadian patent

A method of using a floating platform in deep (1000-3000 feet) water as a drilling/workover and production platform. By interconnecting the subsea wellheads of at least one template to the platform using flexible production risers connected through a reverse loop the platform may be, adjusted on its moorings to position the platform directly over a second template for subsequent drilling or workover. This eliminates the additional expense of separate drilling platforms and workboats. Further, wells of separate templates can be serviced separately and the entire field production need not be completely curtailed during such a workover.

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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 January 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 21, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 21, 1987
GrantedJanuary 21, 1992
Term endedJanuary 21, 2009
Patent numberCA 1294495 C
Classification (IPC)E21B7/12 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMay 21, 1987Patent grantedJan 21, 1992Term endedJan 21, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.