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Arrangement for self-elevating drilling rig

  • US 20030172599A1
  • Filed: 02/13/2003
  • Published: 09/18/2003
  • Est. Priority Date: 03/13/2002
  • Status: Abandoned Application
First Claim
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1. A drilling rig comprising:

  • (a) a plurality of parallel foundation beams;

    (b) an elevatable platform adapted for erection above the foundation beams;

    (c) a rig floor forming a top of the elevatable platform, wherein the rig floor has (i) a drawworks attached to the rig floor on a first side of the rig floor, (ii) a pair of coaxial mast pivot pin mounts attached to the rig floor on a second side of the rig floor opposite the first side of the rig floor;

    (iii) a rotary table positioned between the drawworks and the mast pivot pin mounts; and

    (iv) a pair of coaxial mast connection pin mounts attached to the rig floor between the drawworks and the rotary table; and

    (d) a mast having a rectangular cross-section, a lower mast end and an upper mast end, the lower mast end pivotably attached on a first side to the mast pivot pin mounts such that the mast is pivotable in a vertical plane perpendicular to the foundation beams, the lower mast end further secured on a second side to the mast connection pins whenever the mast is in a vertical position.

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