CN202390155U - Rack and pinion lifting device - Google Patents

Abstract

The utility model discloses a rack-and-pinion lifting device. A pair of lifting units are symmetrically installed on a lifting frame body. Each lifting unit includes a reduction box connected to the output end of a motor. A gear is installed at the end of the motor, and a brake device is connected to the tail end of the motor; a rack is installed on the central axis of the drilling rig, and all the gears are meshed with the rack; slide rails are arranged on the inner edges of both sides of the drilling A set of guide pulleys are respectively installed up and down on the left side and up and down on the right side; a hydraulic system is installed on the top of the lifting frame, and the hydraulic system is connected with all brake devices. The device of the utility model can complete lifting and lowering operations, and carry out pressurization operations, and has simple structure, low use cost and simple maintenance.

Description

Rack and pinion lifting device

technical field

The utility model belongs to the technical field of petroleum drilling rigs and relates to a rack and pinion lifting device.

Background technique

The hoisting system of a conventional oil drilling rig is generally composed of a winch, a crown block, a traveling block, a hook, a faucet, a dead rope fixer, a wire rope, and a rope puller. The conventional drilling rig hoisting system uses the winch to rotate and wind the steel wire rope to drive the hook hanging on the lower part of the traveling car, the faucet (or top drive) and the suspended drilling tool to move up and down through the crown block (fixed pulley) and traveling block (moving pulley) to complete the lifting function. . This structure is currently the most commonly used drilling rig lifting system. The main problems are: complex structure, huge equipment, many fault points, many maintenance points, high purchase and use costs, long power transmission chain, low mechanical efficiency, and only Lifting function, can not carry out pressurization work.

Contents of the invention

The purpose of the utility model is to provide a rack-and-pinion lifting device, which is matched with a rack drilling rig, and solves the problems of the existing conventional drilling rig lifting system, such as bulky equipment, difficult maintenance, low efficiency, and high cost.

The technical solution adopted by the utility model is a rack and pinion lifting device, and a pair of lifting units are symmetrically installed on the lifting frame body, and each lifting unit includes a reduction box connected to the output end of the motor. A gear is installed at the output shaft end of a reduction box, and a brake device is connected to the tail end of the motor; a rack is installed on the central axis of the drilling rig frame, and all gears are meshed with the rack; slide rails are arranged on the inner edges of both sides of the drilling rig frame, A set of guide pulleys are respectively installed on the left side up and down of the lifting frame body and on the right side up and down; a hydraulic system is installed on the top of the lifting frame body, and the hydraulic system is connected with all braking devices.

The beneficial effect of the utility model is that compared with the background technology, 1) the crown block, traveling block, hook, steel wire rope, dead rope fixer, winch, rope rower, etc. are omitted, and the structure is simple, the size is compact, the weight is light, and the purchase And the use cost is low, the maintenance is simple, and there are few vulnerable spare parts. 2) The lifting and lowering functions are completed by directly moving up and down on the rack through the gear, and the transmission efficiency is high. 3) Through the rigid transmission of the rack and pinion, not only the lifting and lowering operations can be completed, but also the pressurization operation can be performed.

Description of drawings

Fig. 1 is a side view structural schematic diagram of the lifting device of the present invention;

Fig. 2 is a schematic structural diagram of the front view of the lifting device of the present invention;

Fig. 3 is a structural schematic diagram of a top view of the lifting device of the present invention.

In the figure, 1. gear, 2. adjusting gasket, 3. bolt A, 4. lifting frame body, 5. reduction box, 6. motor, 7. brake device, 8. left guide pulley, 9. bolt B, 10 .Hydraulic system, 11. Right guide pulley, 12. Rack, 13. Slide rail, 14. Top drive device.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2 and Fig. 3, the structure of the present utility model is that 2 sets, 4 sets or 6 sets of lifting units are installed in symmetrical pairs on the lifting frame body 4, and each set of lifting units is included in the output of the motor 6. The end is connected with a reduction box 5, and each reduction box 5 is fixedly connected with the lifting frame body 4 through a bolt A3, and a gear 1 is installed at the output shaft end of each reduction box 5, and a brake device 7 is connected at the tail end of the motor 6; A rack 12 is installed on the central axis of the frame, and all gears 1 are meshed with the rack 12 in pairs; slide rails 13 are arranged on the inner edges of both sides of the drilling rig frame, and are installed on the left side of the lifting frame body 4 through bolts 9 up and down. A set of left guide pulleys 8, the right side of the lifting frame body 4 are respectively installed with a set of right guide pulleys 11 by bolts 9, all left guide pulleys 8 and right guide pulleys 11 can slide up and down along the slide rails 13 on both sides, all pulleys An adjusting gasket 2 is arranged between the seat and the lifting frame body 4; a hydraulic system 10 is installed on the top of the lifting frame body 4, and the hydraulic system 10 is connected with all braking devices 7; the lower end of the lifting frame body 4 is connected with the top drive device 14.

The device of the utility model drives the gear 1 and the rack 12 fixed on the derrick of the drilling rig to rotate through the motor 6 (or hydraulic motor) and the reduction box 5 when the drill is tripped, thereby driving the top drive device 14 and its lifting tool. and lowering, the left guide pulley 8 and the right guide pulley 11 respectively move along the slide rail 13 fixed on the derrick of the drilling rig and provide guidance for the lifting device, and ensure the vertical movement up and down during the lifting process by adjusting the gasket 2, so that the drilling tool does not deviate from the wellhead. During braking, the hydraulic system 10 controls the braking device 7 to brake the motor 6, the reduction box 5 and the gear 1 to ensure that the lifting device hovers on the rack 12.

Conventional drilling rig lifting systems use steel wire ropes for lifting operations, and the winding efficiency of steel wire ropes is low. However, the rack and pinion drilling rig of the utility model completes the lifting function by directly moving up and down on the rack through the gears, and the transmission efficiency is high. In addition, because the wire rope is flexible, it cannot complete the pressurization function, but the lifting device of the utility model is rigidly driven by the rack and pinion, so that it can not only complete the lifting and lowering operations, but also perform the pressurization operation.

Compared with the existing conventional drilling rig lifting system, the utility model saves the crown block, traveling block, hook, wire rope, dead rope fixer, winch, rope rower, etc., and has simple structure, compact size, light weight, and is easy to purchase and use. Low cost, simple maintenance, few vulnerable spare parts, high transmission efficiency.

Claims (3)

1. A rack-and-pinion lifting device is characterized in that paired lifting units are symmetrically installed on the lifting frame body (4), and each lifting unit includes a reduction box ( 5), a gear (1) is installed at the output shaft end of each reduction box (5), and a brake device (7) is connected to the tail end of the motor (6); a rack (12) is installed on the central axis of the drilling rig, All the gears (1) are meshed with the racks (12); slide rails (13) are arranged on the inner edges of both sides of the drilling machine frame, and a set of guide pulleys are respectively installed on the left side up and down and the right side up and down the lifting frame body (4) ; A hydraulic system (10) is installed on the top of the lifting frame body (4), and the hydraulic system (10) is connected with all braking devices (7). 2. The rack-and-pinion lifting device according to claim 1, characterized in that: said lifting units are installed with 2 sets, 4 sets or 6 sets. 3. The rack-and-pinion lifting device according to claim 1, characterized in that: adjusting shims (2) are provided between all the pulley seats and the lifting frame (4).

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