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Drilling vessel with moveable substructure

  • US 6,203,247 B1
  • Filed: 12/10/1998
  • Issued: 03/20/2001
  • Est. Priority Date: 12/10/1998
  • Status: Expired due to Term
First Claim
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1. A movable structure for use in drilling operations, comprising:

  • (a) a drilling platform, including a plurality of downwardly extending support members attached thereto;

    (b) a base below said drilling platform having means for securely supporting the weight and position of said drilling platform; and

    (c) repositioning means, operatively connected between said support members and said base, for moving said drilling platform in a predetermined direction relative to said base.

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