Hook super slow lifting device

Abstract

The application discloses a large hook super slow lifting device, which comprises a large speed ratio speed reducer, an input shaft of the large speed ratio speed reducer is connected with an output shaft of a power source through a shaft coupling, a primary transmission driving wheel is arranged on an output shaft of the large speed ratio speed reducer, the primary transmission driving wheel is engaged with a primary transmission driven gear, the primary transmission driven gear is installed on a gear shaft, a secondary transmission driving wheel is further sleeved on the gear shaft, and a shift fork is arranged on the secondary transmission driving wheel; the shift fork is pulled, the secondary transmission driving wheel slides on the gear shaft, engagement and disengagement of the secondary transmission driving wheel and a secondary transmission driven gear is realized, and the secondary transmission driven gear is connected with a main drum universal shaft and an angular transmission shaft through fixing bolts. The device can realize super slow and uniform lifting and lowering of a large hook and suspension at any time, effectively controls a drill pipe suspended load, and makes a workover process ideal, so that forging milling, casing milling, windowing, milling and other constructions are smoothly completed.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of the super slow lifting control of the workover rig hook, and relates to a super slow lifting device of a hook. BACKGROUND

[0002] At present, in the process of workover construction such as forging milling, casing milling, windowing and milling, the hook lifting speed is mostly controlled by the engine speed. Since the output shaft speed of the engine is high, it is difficult to realize the slow lifting of the hook. Meanwhile, the hook lowering speed needs to be controlled by the driller controlling the brake lever of the main drum brake. Since the brake lever is released manually, the hook will descend quickly in an instant, and it is difficult to accurately control the weight of the rod string, which may cause the consequences of well blocking and tool slipping, and damage the milling tool. Therefore, a super slow lifting device of a hook is urgently needed to realize the super slow and uniform lifting and lowering of the hook and the suspension at any time. SUMMARY

[0003] To solve the above technical problems, the purpose of the present application is to provide a super slow lifting device of a hook, which can realize the super slow and uniform lifting and lowering of the hook and the suspension at any time, effectively control the weight of the drill pipe, and make the workover process ideal and the construction such as forging milling, casing milling, windowing and milling smooth.

[0004] The present application provides a super slow lifting device of a hook, which comprises a large speed ratio reducer, the input shaft of the large speed ratio reducer is connected with the output shaft of a power source through a shaft coupling, a primary transmission driving wheel is arranged on the output shaft of the large speed ratio reducer, the primary transmission driving wheel is engaged with a primary transmission driven gear, the primary transmission driven gear is installed on a gear shaft, a secondary transmission driving wheel is further sleeved on the gear shaft, and a shift fork is arranged on the secondary transmission driving wheel. The secondary transmission driving wheel is slid on the gear shaft by pulling the shift fork, so as to realize the engagement and disengagement of the secondary transmission driving wheel and a secondary transmission driven gear, and the secondary transmission driven gear is connected with a main drum universal shaft and an angular transmission shaft through fixing bolts.

[0005] In the super slow lifting device of the hook, an overspeed alarm is arranged at the end of the gear shaft to alarm when the device is damaged and the speed exceeds the specified speed.

[0006] In the super slow lifting device of the hook, the power source is an electric motor, a gasoline engine, a diesel engine or a hydraulic motor, which has the function of stepless speed regulation.

[0007] In the super slow lifting device of the hook, the large speed ratio reducer, the power source, the first gear shaft support and the second gear shaft support are fixed on a mounting bottom plate through bolts, and the mounting bottom plate is welded on the I-beam of the workover rig vehicle body.

[0008] The large hook super slow lifting device has at least the following beneficial effects:

[0009] (1) In the prior art, the engine controls the lifting of the large hook and the drum brake controls the lowering of the large hook, which has a sudden start and cannot linearly and stably control the distance and speed, and cannot stably realize the lifting and lowering of the large hook at a certain super slow speed. In the present application, the large speed ratio speed reducer and the secondary transmission pair control the drum transmission shaft, the speed can be linearly adjusted, and the super slow lifting and lowering of the large hook can be realized; the speed reducer has a self-locking function, and can make the large hook hover after stopping.

[0010] (2) The secondary transmission driven wheel is installed on the main drum transmission shaft, without changing the original machine structure and performance, and the structure is simple and the installation is convenient.

[0011] (3) The main drum transmission shaft and the installed secondary transmission driving wheel are provided with a clutch, which can realize the free switching of the engine and the large hook super slow lifting device to meet different production needs, and the operation is simple and fast.

[0012] (4) The overspeed alarm is arranged to alarm when the device is damaged or the speed exceeds the specified speed. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the large hook super slow lifting device. DETAILED DESCRIPTION

[0014] As shown in Figure 1 , the large hook super slow lifting device comprises a power source 11, a large speed ratio speed reducer 9, a primary transmission driving wheel 8, a primary transmission driven gear 7, a gear shaft 13, a secondary transmission driving wheel 14, a secondary transmission driven wheel 17, a main drum universal shaft 1 and an angle transmission shaft 18.

[0015] The input shaft of the large speed ratio speed reducer 9 is connected with the output shaft of the power source 11 through a shaft coupling 10. The output shaft of the large speed ratio speed reducer 9 is provided with the primary transmission driving wheel 8, and the primary transmission driving wheel 8 is engaged with the primary transmission driven gear 7. The primary transmission driven gear 7 is installed on the gear shaft 13, and the gear shaft 13 is fixed on the installation bottom plate 2 through the first gear shaft installation frame 6 and the second gear shaft support 15 at both ends. The gear shaft 13 is also sleeved with the secondary transmission driving wheel 14, and the secondary transmission driving wheel 14 is provided with a shift fork 12. By pulling the shift fork 12, the secondary transmission driving wheel 14 can slide on the gear shaft 13 to realize the engagement and disengagement of the secondary transmission driving wheel 14 and the secondary transmission driven wheel 17. The secondary transmission driven wheel 17 is connected with the main drum universal shaft 1 and the angle transmission shaft 18 through fixing bolts 19 and is fixed between the cross universal shaft flange and the angle transmission shaft flange.

[0016] When the secondary transmission driving wheel 14 meshes with the secondary transmission driven wheel 17, the disconnecting clutch of the transfer case is disconnected, the rotation speed of the main drum is controlled by the large hook ultra slow lifting device of the application, so as to control the large hook ultra slow lifting, when the secondary transmission driving wheel 14 is disengaged from the secondary transmission driven wheel 17, the disconnecting clutch of the transfer case is connected, and the rotation speed of the main drum is controlled by the engine.

[0017] In the embodiment, the gear shaft 13 is provided with an overspeed alarm at the end, which alarms when the device is damaged and the rotation speed exceeds the specified rotation speed.

[0018] In the embodiment, the power source 11 is an electric motor, a gasoline engine, a diesel engine or a hydraulic motor, which has the function of stepless speed regulation.

[0019] In the embodiment, the large speed ratio reducer 9, the power source 11, the first gear shaft support 6 and the second gear shaft support 15 are fixed on the mounting bottom plate 2 by the first bolt 3, the second bolt 4 and the third bolt 5, and the mounting bottom plate 2 is welded on the well servicing truck body I-beam 20.

[0020] The application controls the rotation direction and rotation speed of the main drum universal shaft 1 by the external power source 11, and the large speed ratio reducer 9 has the self-locking function, so that the large hook can be lifted, lowered and suspended at any time at a uniform speed, the drill pipe hanging weight is effectively controlled, and the well servicing process is ideally controlled, so that the forging milling, sleeve milling, windowing and milling operations are smoothly completed.

[0021] The above description is only the preferred embodiment of the application, and is not used to limit the idea of the application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A hook super slow lifting device, characterized in that, It includes: Large speed ratio reducer (9), the input shaft of the large speed ratio reducer (9) is connected with the output shaft of the power source (11) through the shaft coupling (10), the output shaft of the large speed ratio reducer (9) is provided with a primary transmission driving wheel (8), the primary transmission driving wheel (8) is engaged with a primary transmission driven gear (7), the primary transmission driven gear (7) is installed on a gear shaft (13), the gear shaft (13) is also sleeved with a secondary transmission driving wheel (14), the secondary transmission driving wheel (14) is provided with a shift fork (12); pull the shift fork (12), the secondary transmission driving wheel (14) slides on the gear shaft (13) to realize the engagement and disengagement of the secondary transmission driving wheel (14) and the secondary transmission driven wheel (17), the secondary transmission driven wheel (17) is connected with the main roller universal shaft (1) and the angle transmission shaft (18) through the fixing bolt (19); When the secondary transmission driving wheel (14) is engaged with the secondary transmission driven wheel (17), the split differential clutch is disconnected, the main roller speed is controlled through the large hook super slow lifting device, so that the large hook super slow lifting is controlled, when the secondary transmission driving wheel (14) is disengaged from the secondary transmission driven wheel (17), the split differential clutch is closed, and the main roller speed is controlled by the engine.

2. The hook ultra slow lift device of claim 1, wherein, The gear shaft (13) is provided with an overspeed alarm at the end, which alarms when the device is damaged and the speed exceeds the specified speed.

3. The hook ultra slow lift device of claim 1, wherein, The power source (11) is an electric motor, a gasoline engine, a diesel engine or a hydraulic motor, which has the function of stepless speed regulation.

4. The hook ultra slow lift device of claim 1 wherein, The large speed ratio reducer (9), the power source (11), the first gear shaft support (6) and the second gear shaft support (15) are fixed on the mounting bottom plate (2) by bolts, and the mounting bottom plate (2) is welded on the well repair truck body I-beam (20).

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