×

Method and apparatus for transporting and using a drilling apparatus or a crane apparatus from a single movable vessel

  • US 5,388,930 A
  • Filed: 12/30/1993
  • Issued: 02/14/1995
  • Est. Priority Date: 04/06/1992
  • Status: Expired due to Term
First Claim
Patent Images

1. A construction crane package suitable for skidding on and off a jack-up rig, the base of the construction crane being wider than a skid fairway defined by the skid rail width on the jack-up rig, the improvement comprising:

  • a pony comprising a plurality of beams of sufficient length and strength to support the construction crane, said beams being substantially parallel to each other and spaced apart a width that facilitates introducing said pony into the skid fairway on said jack-up rig;

    a plurality of support structures within said pony that raise the base of the construction crane to an elevated zone above said skid fairway, the elevated zone having a width at least as great as the width of the base of the construction crane, said elevated zone facilitating skidding said construction crane on and off said jack-up rig and over obstacles outside the skid fairway, said support structures being suitable to support an overhang of the construction crane base caused by the construction crane base being wider than the width of the skid fairway, said support structures having rigidity sufficient to facilitate operation of the construction crane from the elevated zone when the jack-up rig is jacked-up, said plurality of support structures being of sufficient light weight to facilitate movement during the raising and lowering of said jack-up rig.

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