Substructure of a mobile drilling rig with a movable center floor section
First Claim
Patent Images
1. A raisable substructure of a drilling rig, the raisable substructure comprising:
- first and second substructure boxes, each comprising an upper box and a lower box, wherein each of said upper boxes is adapted to be raised above a respective lower box; and
a movable center floor section that is adapted to be slidably moved in a substantially horizontal direction while being supported by said upper boxes of said first and second substructure boxes during assembly of said drilling rig.
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Accused Products
Abstract
Disclosed herein is a raisable substructure of a drilling rig that includes first and second substructure boxes. The first and second substructure boxes of the raisable substructure each include, among other things an upper box and a lower box, wherein each of the upper boxes is adapted to be raised above a respective lower box. The disclosed raisable substructure also includes a movable center floor section that is adapted to be supported by the upper boxes of the first and second substructure boxes, wherein the movable center floor section is further adapted to be slidably moved between the upper boxes during assembly of the drilling rig.
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Citations
27 Claims
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1. A raisable substructure of a drilling rig, the raisable substructure comprising:
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first and second substructure boxes, each comprising an upper box and a lower box, wherein each of said upper boxes is adapted to be raised above a respective lower box; and a movable center floor section that is adapted to be slidably moved in a substantially horizontal direction while being supported by said upper boxes of said first and second substructure boxes during assembly of said drilling rig. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A substructure of a drilling rig, the substructure comprising:
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first and second raisable substructure boxes, each comprising; a lower substructure box; an upper substructure box comprising a plurality of roller wheel supports; at least one substructure raising apparatus pivotably attached to said upper and lower substructure boxes, said at least one substructure raising apparatus being adapted to raise said upper substructure box relative to said lower substructure box during assembly and erection of said drilling rig; and a movable center floor section supported by said upper substructure boxes of said first and second raisable substructure boxes, wherein said movable center floor section is adapted to be slidably moved between said upper substructure boxes on at least one of said plurality of roller wheel supports during said assembly of said drilling rig. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A method, comprising:
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positioning a first substructure box of a raisable substructure adjacent to and laterally spaced apart from a second substructure box of said raisable substructure; supporting a movable center floor section between said first and second substructure boxes; slidably moving said movable center floor section along said first and second substructure boxes in a substantially horizontal direction to a mast installation position while said movable center floor section is being supported by said first and second substructure boxes; removably coupling said movable center floor section to a bottom mast section of a drilling rig mast; slidably moving said movable center floor section with said bottom mast section removably coupled thereto to a mast attachment position; and pivotably attaching said bottom mast section to said first and second substructure boxes. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. A raisable substructure of a drilling rig, the raisable substructure comprising:
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first and second substructure boxes, each comprising an upper box and a lower box, wherein each of said upper boxes is adapted to be raised above a respective lower box; and a movable center floor section that is adapted to be supported by said upper boxes of said first and second substructure boxes, wherein each of said upper boxes comprises floor sliding means that are adapted to facilitate a sliding movement of said movable center floor section between said upper boxes during assembly of said drilling rig, said floor sliding means comprising a plurality of roller wheel supports that are adapted to rollingly contact said movable center floor section during said sliding movement.
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Specification