Method and apparatus for erecting a drilling rig
First Claim
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1. A method for erecting a drilling rig comprising:
- providing a mast, a base, a floor support, legs arranged between the base and the floor support, a primary lifting ram, and a floor support lifting ram;
raising the mast with said primary lifting ram, said primary lifting ram having a lower end positioned on the base between the legs and an upper end in engagement with said mast disengaging the primary lifting ram from the mast;
simultaneously raising said floor support and said mast disposed on said floor support with said floor support lifting ram to an intermediate height;
engaging said primary lifting ram with said floor support; and
simultaneously raising said floor support and said mast disposed on said floor support from said intermediate height to full working height with said primary lifting ram.
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Abstract
A method for erecting a drilling rig and an apparatus therefor having a mast, a base, a floor support, legs arranged between the base and the floor support, a primary lifting ram in engagement with the mast, and a floor support lifting ram, is disclosed. The method involves raising the mast with the primary lifting ram, raising the floor support with the floor support lifting ram to an intermediate height, engaging the primary lifting ram with the floor support and raising the floor support from the intermediate height to full working height with the mast lifting ram.
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Citations
20 Claims
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1. A method for erecting a drilling rig comprising:
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providing a mast, a base, a floor support, legs arranged between the base and the floor support, a primary lifting ram, and a floor support lifting ram; raising the mast with said primary lifting ram, said primary lifting ram having a lower end positioned on the base between the legs and an upper end in engagement with said mast disengaging the primary lifting ram from the mast; simultaneously raising said floor support and said mast disposed on said floor support with said floor support lifting ram to an intermediate height; engaging said primary lifting ram with said floor support; and simultaneously raising said floor support and said mast disposed on said floor support from said intermediate height to full working height with said primary lifting ram. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14)
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11. An apparatus, comprising:
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a mast; a base; a floor support; legs arranged between the base and the floor support; a primary lifting ram having a lower end and an upper end opposite the lower end, wherein the lower end is connected to a central portion of the base between the legs; a floor lifting ram having a lower end connected to the base; wherein the primary lifting ram has a first position with the upper end of the primary lifting ram directly connected to the mast for raising the mast and a second position with the upper end of the primary lifting ram directly connected to the floor support for raising the floor support. - View Dependent Claims (12, 15, 16, 17, 18, 19, 20)
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Specification