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Expired Canadian patentCanada

Production system for subsea oil wells

CA 1333280 C · Owner: Petroleo Brasileiro S.A. - Petrobras · Inventors: Awad, Samir Passos; Falcao, Helio Lins Marinho; Rodrigues, Renato Sanches

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

This invention presents a subsea production system in which a new concept of subsea structure for oil well drilling completion and production, was specially designed for utilization in water depths of l,000m or more. The structure includes a template manifold which extends radially from a central foundation (3), on top of which said structure (1) shall be set and where the central manifold (31) for well (16) production control is located; each structure arm is provided in its extremity with an opening for adaptation of a guide-base (5) for well (16) drilling and one of the arms (2') of the, structure (1) is intended to receive the connectors (6) of the export and well control lines.

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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 November 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 2011.
  • 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 31, 1989
GrantedNovember 29, 1994
Term endedNovember 29, 2011
Patent numberCA 1333280 C
Classification (IPC)E21B7/12 +1 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 31, 1989Patent grantedNov 29, 1994Term endedNov 29, 2011

Sources & verification

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