Drilling rig mast erection system
First Claim
1. A drilling rig mast erection system, comprising:
- a mast support shoe fixedly attached to a drilling rig substructure, said mast support shoe comprising a support shoe pinned connection;
a bottom mast section of a drilling rig mast, said bottom mast section comprising a first mast pinned connection that is adapted to be pivotably connected to said support shoe pinned connection; and
a mast positioning apparatus that is adapted to pivotably position said bottom mast section so that said first mast pinned connection is positioned adjacent to said support shoe pinned connection, said mast positioning apparatus comprising;
a bottom mast support spreader comprising a first end and a second end, a first spreader end pinned connection positioned on said bottom mast support spreader at said first end, a second spreader end pinned connection positioned on said bottom mast support spreader at said second end, and a first mast erection apparatus pinned connection positioned on said bottom mast support spreader, said first mast erection apparatus pinned connection being positioned on said bottom mast support spreader between said first spreader end pinned connection at said first end and said second spreader end pinned connection at said second end, wherein said first spreader end pinned connection is adapted to be pivotably connected to said bottom mast section at said first spreader end pinned connection; and
a mast erection apparatus having a first end that is adapted to be pivotably connected to said bottom mast support spreader at said first mast erection apparatus pinned connection.
1 Assignment
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Accused Products
Abstract
A drilling rig mast erection system includes a mast support shoe that is fixedly attached to a drilling rig substructure and has a support shoe pinned connection. A bottom mast section has a first mast pinned connection that is adapted to be pivotably connected to the support shoe pinned connection. A mast positioning apparatus is adapted to pivotably position the bottom mast section so that the first mast pinned connection is positioned adjacent to the support shoe pinned connection. The mast positioning apparatus includes a bottom mast support spreader having a first end that is adapted to be pivotably connected to the bottom mast section at a first spreader end pinned connection and a mast erection apparatus having a first end that is adapted to be pivotably connected to the bottom mast support spreader at a first mast erection apparatus pinned connection.
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Citations
19 Claims
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1. A drilling rig mast erection system, comprising:
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a mast support shoe fixedly attached to a drilling rig substructure, said mast support shoe comprising a support shoe pinned connection; a bottom mast section of a drilling rig mast, said bottom mast section comprising a first mast pinned connection that is adapted to be pivotably connected to said support shoe pinned connection; and a mast positioning apparatus that is adapted to pivotably position said bottom mast section so that said first mast pinned connection is positioned adjacent to said support shoe pinned connection, said mast positioning apparatus comprising; a bottom mast support spreader comprising a first end and a second end, a first spreader end pinned connection positioned on said bottom mast support spreader at said first end, a second spreader end pinned connection positioned on said bottom mast support spreader at said second end, and a first mast erection apparatus pinned connection positioned on said bottom mast support spreader, said first mast erection apparatus pinned connection being positioned on said bottom mast support spreader between said first spreader end pinned connection at said first end and said second spreader end pinned connection at said second end, wherein said first spreader end pinned connection is adapted to be pivotably connected to said bottom mast section at said first spreader end pinned connection; and a mast erection apparatus having a first end that is adapted to be pivotably connected to said bottom mast support spreader at said first mast erection apparatus pinned connection. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A drilling rig mast erection system, comprising:
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a drilling rig mast support shoe comprising a shoe pinned connection; a drilling rig mast section comprising a mast pinned connection that is adapted to be pivotably connected to said shoe pinned connection; a mast support spreader having a first end, said mast support spreader comprising; a first spreader pinned connection positioned on said mast support spreader at said first end, wherein said first spreader pinned connection is adapted to be pivotably connected to said drilling rig mast section; and a second spreader pinned connection positioned on said mast support spreader; and a mast positioning apparatus that is adapted to be pivotably connected to said mast support spreader at said second spreader pinned connection, wherein said mast positioning apparatus is adapted to pivotably rotate said mast support spreader and said mast support spreader is adapted to pivotably position said mast pinned connection adjacent to said shoe pinned connection. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification