Multi-activity offshore exploration and/or development drilling method and apparatus

CAFC
  • US 6,056,071 A
  • Filed: 04/14/1999
  • Issued: 05/02/2000
  • Est. Priority Date: 05/03/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A multi-activity drilling assembly mounted above an opening of a drillship, semi-submersible, tension leg platform, jack-up platform, or offshore tower and being operable to be positioned above the surface of a body of water for supporting drilling operations through a drilling deck and into the bed of the body of water, said multi-activity drilling assembly including:

  • an interconnected superstructure positioned at the opening and extending above the drilling deck for simultaneously supporting drilling operations and operations auxiliary to drilling operations through the drilling deck to the seabed;

    a first means connected to said interconnected superstructure for advancing tubular members through the drilling deck, to the seabed and into the bed of the body of water;

    first means, connected to said interconnected superstructure, for handling tubular members as said tubular members are advanced through the drilling deck by said first means for advancing;

    second means connected to said interconnected superstructure for advancing tubular members through the drilling deck and into the body of water to the seabed; and

    second means, connected to said interconnected superstructure, for handling tubular members as said tubular members are advanced through the drilling deck by said second means for advancing for conducting operations auxiliary to said drilling operations, wherein drilling activity can be conducted from said interconnected superstructure by said first or second means for advancing and said first or second means for handling tubular members and auxiliary drilling activity can be simultaneously conducted from said interconnected superstructure by the other of said first or second means for advancing and the other of said first or second means for handling tubular members.

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