×

Method for improving the feasibility of a drilling rig of jack-up type and a drilling rig of jack-up type

  • US 6,030,148 A
  • Filed: 12/01/1997
  • Issued: 02/29/2000
  • Est. Priority Date: 06/09/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A method of improving the feasibility of a jack-up drilling rig, said drilling rig comprising a frame with a working deck and a substantially plane shaped bottom, at least a part of power production and operating equipment being arranged in said frame;

  • at least three feet provided on said frame, said feet being arranged to move vertically with respect to said frame by means of lifting devices between a standby position in which said feet are elevated for transportation of said drilling rig and a working position in which said feet support said frame on the sea bottom;

    a drilling unit provided on said frame, said drilling unit being moveable in a horizontal direction with respect to said frame between a transportation position wherein said drilling unit is substantially above said frame and a drilling position wherein said drilling unit is substantially outside said frame; and

    a blow arrangement, said method comprising the steps of;

    providing an air space, defined by side walls and an open lower end portion, below said plane shaped bottom;

    filling said air space with air via said blow arrangement to form an air-bed, at least when said feet are moving;

    discharging said air space for transporting said drilling rig.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×