Brace support mast assembly for a transportable rig
First Claim
1. A support system for a transportable rig operable for use with well head equipment on a well, comprising:
- a rig carrier operable to transport at least a portion of said transportable rig; and
a mast assembly comprising;
a pivotal portion of said mast assembly attached to said rig carrier, said pivotal portion of said mast assembly being movable between a lowered position and an upright position, said pivotal portion comprising a first mast support plate oriented laterally with respect to a longitudinal axis of the pivotal portion;
a base portion of said mast assembly extending upwardly from a rear portion of said rig carrier, said base portion comprising a second mast support plate at an upper end thereof, wherein the second mast support plate contacts the first mast support plate and supports said pivotal portion of said mast assembly when said pivotal portion of said mast assembly is in said upright position; and
a pivot joint connecting the pivotal portion and the base portion, wherein the pivot joint is positioned adjacent to the mast support plate and the base support plate, wherein in the upright position said pivotal portion extends rearwardly with respect to said rig carrier further than the base portion of the mast assembly, wherein in the upright position the pivotal portion has a generally vertical orientation, and wherein the pivot joint is located at a bottom end of the pivotal portion.
6 Assignments
0 Petitions
Accused Products
Abstract
A mast assembly for a transportable rig which accommodates the height of wellhead equipment such as BOP and/or valve stacks and permits orientation of a top drive rotor in the mast directly over the wellhead as the top drive moves up and down in the mast. In one embodiment, the mast contains a base portion that supports a moveable portion of the mast assembly. In one embodiment, angularly rearwardly oriented supports are utilized to provide an open space to accommodate the height of the wellhead equipment between upright rails on which the top drive moves so that the top drive rotor can be aligned with the bore of the wellhead equipment.
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Citations
22 Claims
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1. A support system for a transportable rig operable for use with well head equipment on a well, comprising:
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a rig carrier operable to transport at least a portion of said transportable rig; and a mast assembly comprising; a pivotal portion of said mast assembly attached to said rig carrier, said pivotal portion of said mast assembly being movable between a lowered position and an upright position, said pivotal portion comprising a first mast support plate oriented laterally with respect to a longitudinal axis of the pivotal portion; a base portion of said mast assembly extending upwardly from a rear portion of said rig carrier, said base portion comprising a second mast support plate at an upper end thereof, wherein the second mast support plate contacts the first mast support plate and supports said pivotal portion of said mast assembly when said pivotal portion of said mast assembly is in said upright position; and a pivot joint connecting the pivotal portion and the base portion, wherein the pivot joint is positioned adjacent to the mast support plate and the base support plate, wherein in the upright position said pivotal portion extends rearwardly with respect to said rig carrier further than the base portion of the mast assembly, wherein in the upright position the pivotal portion has a generally vertical orientation, and wherein the pivot joint is located at a bottom end of the pivotal portion. - View Dependent Claims (2, 3, 11, 12, 13, 14)
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4. A support system for a transportable rig operable for work with a wellhead comprising a height, comprising:
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a rig carrier operable to transport at least a portion of a transportable rig; a mast assembly pivotally attached to a base assembly for operation in an upright position, wherein said mast assembly comprises a first side facing toward said rig carrier and a second side of said mast assembly facing away from said rig carrier, wherein in the upright mast position said mast assembly extends horizontally farther from rig carrier than the base assembly; at least two angular brace members, wherein in the upright mast position said at least two angular brace members support rails, wherein in the upright mast position said at least two angular brace members are positioned below said rails, wherein in the upright mast position said at least two angular brace members extend angularly upwardly and away from said rig carrier whereby a top end of each of the at least two angular brace members is located a greater distance from the first side than a bottom end of the at least two angular brace members, wherein in the upright mast position said at least two angular brace members define an open space beneath said mast assembly, and wherein said base assembly is detachable from the rig carrier and replaceable with a different base assembly having a different height, wherein the different base assembly is mounted to adjust a height of an open space beneath said mast assembly to accommodate a variation of said height of said wellhead. - View Dependent Claims (5, 15, 16)
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6. A method for manufacturing a support system for a transportable rig well completion system, comprising:
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providing a rig carrier operable to transport at least a portion of said transportable rig; mounting a mast assembly to said rig carrier; attaching a moveable portion of said mast assembly to a pivot connection to be movable between a lowered position and an upright position, wherein the pivot connection is located at an end of the movable portion; mounting a base portion of said mast assembly on said rig carrier in an upright position to receive a lower end of said moveable portion of said mast assembly, wherein the movable portion extends horizontally farther from the rig carrier than the base portion when the movable portion is in the upright position, thereby defining an empty space adjacent to the base portion and below the movable portion; and detaching the base portion from said rig carrier and replacing the base portion with a different base portion having a different height, thereby adjusting a height of an open space beneath the movable portion to accommodate a variation of said height of a wellhead. - View Dependent Claims (7, 8, 9, 10, 17, 18)
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19. A support system for a transportable rig operable for use with well head equipment on a well, comprising:
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a rig carrier operable to transport at least a portion of said transportable rig; and a mast assembly comprising; a pivotal portion of said mast assembly attached to said rig carrier, said pivotal portion of said mast assembly being movable between a lowered position and an upright position, said pivotal portion comprising a first mast support plate oriented laterally with respect to a longitudinal axis of the pivotal portion; a base portion of said mast assembly extending upwardly from a rear portion of said rig carrier, said base portion comprising a second mast support plate at an upper end thereof, wherein the second mast support plate contacts the first mast support plate and supports said pivotal portion of said mast assembly when said pivotal portion of said mast assembly is in said upright position; and a pivot joint connecting the pivotal portion and the base portion, wherein the pivot joint is positioned adjacent to the mast support plate and the base support plate, wherein said base portion is detachable from said rig carrier and replaceable with a different base portion having a different height, wherein the different base portion is mounted to adjust a height of an open space beneath said mast assembly to accommodate a variation of said height of said wellhead. - View Dependent Claims (20)
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21. A support system for a transportable rig operable for work with a wellhead comprising a height, comprising:
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a rig carrier operable to transport at least a portion of a transportable rig; a mast assembly pivotally attached to a base assembly for operation in an upright mast position, wherein said mast assembly comprises a first side facing toward said rig carrier and a second side of said mast assembly facing away from said rig carrier, wherein in the upright mast position said mast assembly extends horizontally farther from rig carrier than the base assembly; at least two angular brace members, wherein in the upright mast position said at least two angular brace members support rails, wherein in the upright mast position said at least two angular brace members are positioned below said rails, wherein in the upright mast position said at least two angular brace members extend angularly upwardly and away from said rig carrier whereby a top end of each of the at least two angular brace members is located a greater distance from the first side than a bottom end of the at least two angular brace members, wherein in the upright mast position said at least two angular brace members define an open space beneath said mast assembly, wherein in the upright mast position said mast assembly extends rearwardly with respect to said rig carrier further than the base assembly, wherein in the upright mast position said mast assembly has a generally vertical orientation, and wherein a pivot joint is located at a bottom end of said mast assembly. - View Dependent Claims (22)
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Specification