Hydraulic drilling rig and power swivel
First Claim
Patent Images
1. A power swivel for a drilling derrick or the like, comprising:
- a rotary drive assembly,a removable swivel stem assembly, said swivel stem assembly including a hollow shaft drivingly engaged with said rotary drive assembly and having a lower stem end for threadably engaging a pipe and an upper end, a rotary coupling joined to said upper end for connecting the hollow shaft with a source of fluid; and
a pipe-holding assembly for holding a pipe against downward movement relative to said rotary drive assembly, said drive assembly including an outer main housing, said swivel stem assembly including an auxiliary housing, and locking means operatively securing said auxiliary housing to said main housing and providing for quick separation of said swivel stem assembly from said drive assembly.
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Accused Products
Abstract
A two-ram hydraulic drilling rig is provided with a lateral support frame. The rams have rods connected through a tension structure with a power swivel. The power swivel has a removable swivel stem assembly for allowing through-swivel positioning of drill pipe, particularly for tripping.
42 Citations
25 Claims
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1. A power swivel for a drilling derrick or the like, comprising:
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a rotary drive assembly, a removable swivel stem assembly, said swivel stem assembly including a hollow shaft drivingly engaged with said rotary drive assembly and having a lower stem end for threadably engaging a pipe and an upper end, a rotary coupling joined to said upper end for connecting the hollow shaft with a source of fluid; and a pipe-holding assembly for holding a pipe against downward movement relative to said rotary drive assembly, said drive assembly including an outer main housing, said swivel stem assembly including an auxiliary housing, and locking means operatively securing said auxiliary housing to said main housing and providing for quick separation of said swivel stem assembly from said drive assembly. - View Dependent Claims (2, 3)
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4. A power swivel for a drilling derrick or the like, comprising:
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a rotary drive assembly, a removable swivel stem assembly, said swivel stem assembly including a hollow shaft drivingly engaged with said rotary drive assembly and having a lower stem end for threadably engaging a pipe and an upper end, a rotary coupling joined to said upper end for connecting the hollow shaft with a source of fluid; and a pipe-holding assembly for holding a pipe against downward movement relative to said rotary drive assembly said drive assembly including a hollow core for receiving said hollow shaft, entry guide means adapted for fitting within said hollow core alternatively to said hollow shaft when said swivel stem assembly is removed, and means for locking said entry guide means to said drive assembly.
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5. A derrick for drilling, reworking or the like, comprising:
pipe racking means, a pair of hydraulic actuators having ends extendible vertically beyond a standard drill pipe length, a rigid tower secured to said actuators rearwardly thereof for providing lateral stability to said actuators while leaving a front access opening, a tension structure joined to said extendible ends and extending downwardly therefrom, a power swivel secured to the lower end of said tension structure, said power swivel having a removable swivel stem assembly whereby pipe can be tripped through the power swivel and carried through said front access opening, elongated vertical track means, means on said power swivel for guidingly engaging said track means for precluding rotation of said power swivel, and auxiliary hoist means for moving pipe through said front access opening. - View Dependent Claims (6, 7, 8)
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9. A power swivel for a drilling derrick or the like, comprising:
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a rotary drive assembly having a hollow central passage, said drive assembly including a motor which is vertically movable together with the remainder of the drive assembly, a stem assembly including a hollow shaft seated in said central passage and drivingly engaged with said rotary drive assembly, said hollow shaft having a lower stem end for threadably engaging a pipe and an open upper end, and means joined to said hollow shaft upper end for connecting the hollow shaft with a source of drilling fluid, and wherein said stem assembly is removable as a unit from the power swivel, thereby leaving the hollow central passage in the rotary drive assembly for passing pipe axially through the rotary drive assembly. - View Dependent Claims (10, 11, 20, 21)
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12. In a power swivel assembly for a drilling rig comprising:
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power means having a vertical opening through which drill pipe can be passed while being tripped, said power means including a motor which is vertically movable together with the remainder of the power swivel assembly, rotary power output means adapted to occupy said opening and be driven by said power means and adapted to drivingly connect to a drill pipe depending from its lower end, said output means being removable from said opening when disconnected from the drill pipe, and pipe holding means operatively associated with said power means for selectively holding drill pipe from lowering when said power output means is disconnected from the pipe. - View Dependent Claims (13, 14)
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15. The method of moving pipe in an earth-working operation including connecting pipe sections to a power swivel by threadably joining the sections to a rotary driven stem assembly of the power swivel and alternately tripping lengthy, connected pipe sections from the earth, the improvement comprising:
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removing the rotary driven stem assembly from the power swivel, leaving a central passage; and moving the pipe and the power swivel axially relative to each other for removal of the pipe from the earth by causing the pipe to move through said central passage. - View Dependent Claims (16, 17, 18)
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19. In a method of drilling and then tripping a drill pipe by use of a vertically movable power swivel unit containing a motor which moves in its entirety vertically with the rest of the power swivel unit and also containing a removable rotary power output component, the steps of
connecting the power output component to a drill pipe, drilling by driving the power output component with the motor to turn the pipe and gradually advancing the turning pipe by moving the power swivel unit downwardly, ceasing drilling and holding the drill pipe against downward movement independently of the power output component, disconnecting the power output component from the pipe and removing said component from the power swivel unit such as to leave an opening through the remainder of the power swivel unit aligned with the pipe, moving the pipe and said remainder of the power swivel unit such as to move the pipe endwise through said opening and locate part of the pipe above the power swivel unit, and removing a portion of the pipe located above the power swivel unit.
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23. In a method of tripping a drill pipe after a vertically movable power swivel unit containing a motor entirely vertically movable with said unit is used to turn the pipe during drilling by action of a power output component of the power swivel unit which is detachably connected to the pipe and is driven within the power swivel unit by the motor,
disconnecting the power output component from the pipe and removing it from the power swivel unit such as to leave a vertical opening which passes completely through the remainder of the vertically movable power swivel unit and is aligned with the pipe, and raising the pipe and moving the pipe and said remainder of the power swivel unit relative to one another such as to move the pipe through said opening.
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24. In a method of tripping sections of a drill pipe from a drill hole after a power swivel unit containing a motor is used during drilling to turn the pipe by action of a power output component of the power swivel unit which is detachably connected to the pipe and is driven by the motor while the entire power swivel unit is gradually moved downwardly to advance the turning pipe,
disconnecting the power output component from the pipe and removing it from the power swivel unit such as to leave an opening through the remainder of the power swivel unit aligned with the pipe, raising the pipe and power swivel unit, lowering the power swivel unit relative to the pipe with the pipe passing through said opening to locate at least one section of the pipe above the power swivel unit, and removing a section of the pipe located above the power swivel unit.
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25. In a method of tripping sections of a drill pipe from a drill hole after a vertically movable power swivel unit containing a motor and carrying an elevator is used during drilling to turn the pipe by action of a power output component of the power swivel unit which is detachably connected to the pipe and is driven within the power swivel unit by the motor, the steps of
disconnecting the power output component from the pipe and removing it from the power swivel unit such as to leave an opening through the remainder of the power swivel unit aligned with the pipe, holding the top of the pipe aligned with said opening with said elevator and raising the power swivel unit to responsively raise the pipe by the elevator, gripping the pipe independently of said elevator in alignment with said opening, lowering the power swivel unit and elevator relative to the gripped pipe with the pipe passing through said opening to locate at least one section of the pipe above the power swivel unit, and removing a section of the pipe located above the power swivel unit.
Specification