CN110566139A - Hydraulic workover rig - Google Patents
Hydraulic workover rig Download PDFInfo
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- CN110566139A CN110566139A CN201910762633.9A CN201910762633A CN110566139A CN 110566139 A CN110566139 A CN 110566139A CN 201910762633 A CN201910762633 A CN 201910762633A CN 110566139 A CN110566139 A CN 110566139A
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- workover
- pumping
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- 238000005086 pumping Methods 0.000 claims abstract description 56
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 26
- 239000003921 oil Substances 0.000 claims description 96
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 11
- 238000012546 transfer Methods 0.000 claims description 8
- 239000002828 fuel tank Substances 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 11
- 238000012423 maintenance Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 4
- 230000009347 mechanical transmission Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 230000008569 process Effects 0.000 description 10
- 230000008859 change Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/084—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with flexible drawing means, e.g. cables
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
- E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/126—Adaptations of down-hole pump systems powered by drives outside the borehole, e.g. by a rotary or oscillating drive
Abstract
The invention relates to a hydraulic workover rig which comprises a workover hoist module, a pumping module, a hydraulic winch module, a power module for providing power for the workover hoist module, the pumping module and the hydraulic winch module, a control module for controlling the workover hoist module, the pumping module, the hydraulic winch module and the power module, and a support leg module and a unit structure module for supporting the modules. The beneficial effects are as follows: the invention realizes two working modes of workover and swabbing operation through the up-and-down lifting movement of the hydraulic oil cylinder, replaces a roller, a derrick and a roller braking system of the traditional workover rig, and adopts an electric and hydraulic transmission and control mode to meet the increasingly strict environmental protection requirement; in addition, the workover rig disclosed by the invention also has the following advantages: the overhead traveling crane has the advantages of no overhead traveling crane risk, high transmission efficiency, convenient transportation, simple structure, low replacement and maintenance cost, short operation preparation time, high lifting speed, few mechanical transmission parts and capability of basically eliminating the problems of running, falling, dripping and leaking.
Description
Technical Field
The invention relates to underground oil and gas extraction equipment, in particular to a hydraulic workover rig.
Background
workover and pumping are the main processes of the downhole operation of the oil field, and workover rig is the main operation equipment for workover and pumping at present. The traditional workover rig mainly adopts the working form of roller-derrick-crown block-traveling block, firstly, the power of an engine or a motor is transmitted to the roller through a speed changer, a transfer case, a transmission shaft, an angle transmission case and the like, and the roller can realize the lifting and lowering actions in the workover by matching with the derrick, the crown block, the traveling block and the like, and does not have the function of automatic pumping. The working and transmission mode has the advantages of complex structure, complex operation and control, poor safety, easy occurrence of up-down collision and smashing accidents, low working efficiency and power utilization efficiency, large consumption of fuel oil and steel wire ropes, complex operation preparation process, high moving and maintenance cost, serious leakage problems and no automatic pumping function.
Although a small part of the existing workover rigs adopt a single hydraulic cylinder to lift and lower to realize operation, the technology is still immature, and the large hook also shakes along with the irregular rotation of the single hydraulic cylinder in the work, so that the work difficulty and danger are increased. And the workover rig of single hydraulic cylinder promotes power not enough, the speed is low, does not have automatic pumping function, can't satisfy the requirement that the oil field operation improves gradually.
According to the current situation of the workover rig, the hydraulic workover rig is developed on the basis of market research.
disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a hydraulic workover rig which realizes workover and pumping operations through the vertical lifting movement of a hydraulic oil cylinder.
The invention relates to a hydraulic workover rig, which adopts the technical scheme that:
The system comprises a well workover hoisting module, a pumping module, a hydraulic winch module, a power module for providing power for the well workover hoisting module, the pumping module and the hydraulic winch module, a control module for controlling the actions of the well workover hoisting module, the pumping module, the hydraulic winch module and the power module, and a supporting leg module and a unit structure module for supporting the well workover hoisting module, the pumping module, the hydraulic winch module, the power module and the control module.
The invention provides a hydraulic workover rig, which also comprises the following auxiliary technical scheme:
the power module comprises a power source, a transfer case, an oil pump and a radiator, the power source transmits kinetic energy to the oil pump through the transfer case, and the oil pump outputs hydraulic energy and flow to the control module and the swabbing module.
The control module comprises a valve group, a sensor, an instrument, a pipeline and an electric control module; the electric control module is used for distributing hydraulic energy and flow output by the power module through a preset working logic relation and is also used for controlling the sensor to realize the action of the pumping module.
The workover hoist module comprises an outer sliding frame and an inner sliding frame, the inner sliding frame is driven to slide along a hydraulic oil cylinder of the outer sliding frame and a sliding trolley capable of sliding on the inner sliding frame, a pulley block is arranged at the top of the inner sliding frame, a steel wire rope is arranged on the pulley block, a fixing frame is arranged on the outer sliding frame, one end of the steel wire rope is fixed on the fixing frame, the other end of the steel wire rope is fixed on the sliding trolley, and an oil rod component fixing head is arranged on the sliding trolley.
Wherein the pumping module and the workover hoisting module share a set of mechanical structure.
The swabbing module also comprises a limit switch for controlling the lifting and lowering actions of the hydraulic oil cylinder; when the inner sliding frame moves upwards to a lower set point of the limit switch, the limit switch automatically sends an instruction to the control module, and the control module switches oil working modes of an oil inlet and an oil return port of the hydraulic oil cylinder mutually, namely the oil inlet changes into oil and the oil return port changes into oil, so that the oil cylinder moves downwards; when the inner sliding frame moves downwards to the upper set point of the limit switch, the limit switch automatically sends an instruction to the control module, and the control module switches the working modes of oil in the oil inlet and the oil return port of the hydraulic oil cylinder mutually, namely the oil inlet is changed into oil, the oil return port is changed into oil return, so that the oil cylinder moves upwards, and the operation is repeated in a circulating mode to realize the automatic swabbing function.
The hydraulic winch module comprises a hydraulic winch, a steel wire rope, an arm support, a pulley block and a hook; the hydraulic winch is driven to rotate by hydraulic oil in the oil cylinder and drives the steel wire rope, the pulley block and the lifting hook to move mutually so as to realize the up-and-down movement of the hung object.
the supporting leg module comprises an oil cylinder and inner and outer telescopic supporting legs; and hydraulic oil in the oil cylinder drives the inner telescopic supporting leg and the outer telescopic supporting leg to move so as to adjust the working width and the working height of the workover rig.
the unit structure module comprises a frame, a hydraulic oil tank, a fuel tank and a battery pack, a protective cover is arranged around the frame, and the swabbing module, the power module, the control module and the support leg module are all arranged on the frame.
Wherein the power source is an electric motor and/or a diesel engine.
The implementation of the invention comprises the following technical effects:
According to the hydraulic workover rig provided by the invention, workover and swabbing operations are realized through the up-and-down lifting movement of the hydraulic oil cylinder, a roller, a derrick and a roller braking system of the traditional workover rig are replaced, and electric and hydraulic transmission and control are adopted, so that the transmission and control mode conforms to the trend of the current mainstream equipment technical development, and meets the increasingly strict environmental protection requirement; the hydraulic workover rig provided by the invention has two working modes of workover and pumping.
the working process of the workover mode of operation: the working mode is set to the workover working mode through the control console, then the up-and-down movement of the lifting oil cylinder is realized by controlling the operating handle, the gear shifting problem and the load problem do not need to be considered in the whole workover process, the lifting system can automatically lift the load according to the load, only one operating handle related to the workover work is arranged on the control console, the upward pushing is oil cylinder lifting, corresponding oil pipe lifting action, the downward pulling is oil cylinder lowering, corresponding oil pipe lowering action, the speed of the oil cylinder movement can be controlled by an operator by controlling the opening size of the operating handle, and the operation is very simple.
The process of the automatic pumping mode of operation: the automatic pumping operation is automatically completed by the system, an operator is not required to operate, the operator only needs to set the working mode of the console to the automatic pumping working mode at first, and then presses the start button, so that the equipment can automatically realize the up-and-down movement of the lifting oil cylinder.
The workover rig further has the following advantages:
1. Is safe and reliable. The workover rig provided by the invention is pushed by the oil cylinder to move in the processes of lifting and lowering, so that the risk of jacking a crown block is avoided;
2. The economy is high. The workover rig has the advantages of high transmission efficiency, fuel saving, little consumption of steel wire ropes, no guy ropes, convenient frame lifting and collecting and transportation, low moving cost, simple system structure, low replacement cost of accessories and low maintenance cost;
3. The working efficiency is high. The operation preparation time of the workover rig is greatly shortened, and the lifting speed is high;
4. is environment-friendly. The workover rig has high efficiency, less discharge and less mechanical transmission parts, and basically eliminates the problems of leakage, overflow and leakage;
5. the operation is simple and convenient. The workover rig realizes stepless speed change, the workover operation is realized through one handle, and the pumping operation is automatic;
6. A dual pressure system. The workover rig works in a low-pressure state at ordinary times, and is switched to a high-pressure state to be unlocked when jamming occurs;
7. The service life is long. The workover rig has the advantages of simple and modularized structure, low failure rate and convenience in maintenance;
8. Automatic and continuous pumping function. After the pumping rod is placed down, the workover rig can perform automatic and continuous pumping operation under pressure without replacing equipment, can accurately control the up-down stroke and the speed of the pumping rod, accurately simulates actual oil production operation while meeting the pumping environmental protection requirement, and greatly saves manpower, material resources, financial resources and time.
Drawings
fig. 1 is a schematic structural diagram of a hydraulic workover rig according to the present invention.
Fig. 2 is a schematic structural view of an inner carriage of the hydraulic workover rig of the present invention.
Fig. 3 is a schematic structural view of an outer carriage of the hydraulic workover rig of the present invention.
Fig. 4 is a schematic structural diagram of the combination of the inner carriage and the outer carriage of the hydraulic workover rig of the present invention.
Fig. 5 is a schematic structural view of a frame of the hydraulic workover rig of the present invention.
Fig. 6 is a schematic structural view of a shroud of the hydraulic workover rig of the present invention.
1-workover hoist module, 2-swabbing module, 3-hydraulic winch module, 4-power module, 5-control module, 6-support leg module, 7-unit structure module, 11-outer carriage, 12-inner carriage, 13-hydraulic cylinder, 14-sliding trolley, 15-pulley block, 16-steel wire rope, 17-fixing frame, 18-oil rod component fixing head, 71-vehicle frame and 72-shield.
Detailed Description
The present invention will be described in detail below with reference to embodiments and drawings, it being noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not limit it in any way.
As shown in fig. 1-6, the hydraulic workover rig provided by the present invention includes a workover hoist module 1, a pumping module 2, a hydraulic winch module 3, a power module 4 for providing power to the workover hoist module 1, the pumping module 2 and the hydraulic winch module 3, a control module 5 for controlling the workover hoist module 1, the pumping module 2, the hydraulic winch module 3 and the power module 4, and a leg module 6 and a unit structure module 7 for supporting the workover hoist module 1, the pumping module 2, the hydraulic winch module 3, the power module 4 and the control module 5.
According to the hydraulic workover rig provided by the invention, two working modes of workover and swabbing operation are realized through the up-and-down lifting movement of the hydraulic oil cylinder, a roller, a derrick and a roller braking system of the traditional workover rig are replaced, and electric and hydraulic transmission and control are adopted, so that the transmission and control mode conforms to the trend of the current mainstream equipment technical development, and the increasingly strict environmental protection requirements are met. The workover rig provided by the invention is pushed by the oil cylinder to move in the processes of lifting and lowering, so that the risk of jacking a crown block is avoided; the transmission efficiency is high, fuel oil is saved, steel wire ropes are consumed very little, no guy ropes exist, the frame is convenient to take up and transport, the moving cost is low, the system structure is simple, and the replacement cost and the maintenance cost are low; the operation preparation time is greatly shortened, and the lifting speed is high; the efficiency is high, the discharge is less, the mechanical transmission parts are less, and the problems of leakage and leakage are basically eliminated; the workover rig realizes stepless speed change, the workover operation is realized through one handle, and the pumping operation is automatic; the workover rig works in a low-pressure state at ordinary times, and is switched to a high-pressure state to be unlocked when jamming occurs; the workover rig provided by the invention has the advantages of simple structure, modularization, low failure rate, convenience in maintenance and automatic continuous pumping function. In addition, after the pumping rod is lowered, the workover rig can perform automatic and continuous pumping operation under pressure without replacing equipment, can accurately control the up-and-down stroke and speed of the pumping rod, accurately simulates actual oil production operation while meeting the pumping environmental protection requirement, and greatly saves manpower, material resources, financial resources and time.
The working process of the workover mode of operation: the working mode is set to the workover working mode through the control console, then the up-and-down movement of the lifting oil cylinder is realized by controlling the operating handle, the gear shifting problem and the load problem do not need to be considered in the whole workover process, the lifting system can automatically lift the load according to the load, only one operating handle related to the workover work is arranged on the control console, the upward pushing is oil cylinder lifting, corresponding oil pipe lifting action, the downward pulling is oil cylinder lowering, corresponding oil pipe lowering action, the speed of the oil cylinder movement can be controlled by an operator by controlling the opening size of the operating handle, and the operation is very simple.
The process of the automatic pumping mode of operation: the automatic pumping operation is automatically completed by the system, an operator is not required to operate, the operator only needs to set the working mode of the console to the automatic pumping working mode at first, and then presses the start button, so that the equipment can automatically realize the up-and-down movement of the lifting oil cylinder.
Preferably, the power module 4 includes a power source, a transfer case, an oil pump and a radiator, the power source transfers kinetic energy to the oil pump through the transfer case, and the oil pump outputs hydraulic energy and flow to the control module and the swabbing module. In order to balance the heat energy generated by the power module during operation, a radiator is disposed in the power module in this embodiment to control the operating temperature of the power module within a reasonable range, so as to ensure good operation of the entire power module.
Preferably, the control module 5 comprises a valve group, sensors, meters, piping and an electrical control module; the electric control module is used for distributing hydraulic energy and flow output by the power module through a preset working logic relation and is also used for controlling the sensor to realize the action of the pumping module. In this embodiment, the electric control module is preset with a working logic relationship to realize reasonable distribution of pressure and flow of the power module, and meanwhile, the electric control module can realize reasonable control of the manual pumping mode through the control handle and realize reasonable control in the automatic pumping mode through the control sensor.
As shown in fig. 2-4, the pumping module includes an outer carriage 11, an inner carriage 12, a hydraulic cylinder 13 driving the inner carriage 11 to slide along the outer carriage 12, and a sliding trolley 14 capable of sliding on the inner carriage 12, a pulley block 15 is disposed at the top of the inner carriage 12, a steel wire rope 16 is disposed on the pulley block 15, a fixing frame 17 is disposed on the outer carriage 11, one end of the steel wire rope 16 is fixed on the fixing frame 17, the other end of the steel wire rope 16 is fixed on the sliding trolley 14, and an oil rod assembly fixing head 18 is disposed on the sliding trolley.
The pumping process of the invention is as follows:
When hydraulic oil in the oil cylinder drives the hydraulic oil cylinder 13 to move up and down, the hydraulic oil cylinder 13 drives the inner sliding frame 12 to move up and down, the inner sliding frame 12 moves up and down to drive the sliding trolley 14 arranged on the inner sliding frame 12 to move up and down, the sliding trolley 14 moves up and down to drive the oil rod component fixing head 18, and the oil rod component fixing head 18 moves up and down to drive the oil pipe, the drill rod, the oil pumping rod and other structures fixed on the oil rod component fixing head 18 to move up and down, so that pumping work is completed.
It should be noted that the pumping module 2 and the workover hoist module 1 of the present invention share a set of mechanical structure.
As shown in fig. 1, the pumping module 2 further includes a limit switch for controlling the upward and downward movements of the hydraulic oil cylinder 13; when the inner sliding frame 12 moves upwards to a lower set point of the limit switch, the limit switch automatically sends an instruction to the control module 5, and the control module 5 switches oil working modes of an oil inlet and an oil return port of the hydraulic oil cylinder 13 mutually, namely the oil inlet changes into return oil and the oil return port changes into oil, so that the oil cylinder moves downwards; when the inner sliding frame 12 moves downwards to the upper set point of the limit switch, the limit switch automatically sends an instruction to the control module 5, and the control module 5 switches the working modes of oil in the oil inlet and the oil return opening of the hydraulic oil cylinder mutually, namely the oil inlet is changed into oil, the oil return opening is changed into oil, so that the oil cylinder moves upwards, and the operation is repeated in a circulating mode to realize the automatic swabbing function.
Preferably, the hydraulic winch module comprises a hydraulic winch, a steel wire rope, an arm support, a pulley block and a hook; the hydraulic winch is driven to rotate by hydraulic oil in the oil cylinder and drives the steel wire rope, the pulley block and the lifting hook to move mutually so as to realize the up-and-down movement of the hung object.
As shown in fig. 1, the leg module 6 includes an oil cylinder, and inner and outer telescopic legs; and hydraulic oil in the oil cylinder drives the inner telescopic supporting leg and the outer telescopic supporting leg to move so as to adjust the working width and the working height of the workover rig. In the embodiment, the hydraulic oil drives the inner telescopic supporting leg and the outer telescopic supporting leg to move, so that the horizontal extension and the lifting movement required by various occasions are realized, and the equipment can be reasonably controlled to be in the optimal working width and the reasonable working height.
As shown in fig. 1, 5-6, the modular structural module 7 includes a frame 71, which serves as a bridge between all modules on the workover rig, hydraulic tanks, fuel tanks, battery packs, and a shroud 72.
The power source in the present invention may be an electric motor, a diesel engine, or a combination of an electric motor and a diesel engine.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The hydraulic workover rig is characterized by comprising a workover hoisting module, a pumping module, a hydraulic winch module, a power module for providing power for the workover hoisting module, the pumping module and the hydraulic winch module, a control module for controlling the workover hoisting module, the pumping module, the hydraulic winch module and the power module to act, and a support leg module for supporting the workover hoisting module, the pumping module, the hydraulic winch module, the power module and the control module.
2. A hydraulic workover rig according to claim 1, wherein: the power module comprises a power source, a transfer case, an oil pump and a radiator, the power source transmits kinetic energy to the oil pump through the transfer case, and the oil pump outputs hydraulic energy and flow to the control module and the swabbing module.
3. A hydraulic workover rig according to claim 1, wherein: the control module comprises a valve bank, a sensor, an instrument, a pipeline and an electric control module; the electric control module is used for distributing hydraulic energy and flow output by the power module through a preset working logic relation and is also used for controlling the sensor to realize the action of the pumping module.
4. A hydraulic workover rig according to any one of claims 1 to 3, wherein: the workover hoist module comprises an outer sliding frame and an inner sliding frame, the inner sliding frame is driven to slide along a hydraulic oil cylinder of the outer sliding frame and a sliding trolley capable of sliding on the inner sliding frame, the top of the inner sliding frame is provided with a pulley block, a steel wire rope is arranged on the pulley block, a fixing frame is arranged on the outer sliding frame, one end of the steel wire rope is fixed on the fixing frame, the other end of the steel wire rope is fixed on the sliding trolley, and an oil rod component fixing head is arranged on the sliding trolley.
5. A hydraulic workover rig according to claim 4, wherein: the pumping module and the workover hoisting module share one set of mechanical structure.
6. A hydraulic workover rig according to claim 5, wherein: the pumping module also comprises a limit switch for controlling the lifting and lowering actions of the hydraulic oil cylinder; when the inner sliding frame moves upwards to a lower set point of the limit switch, the limit switch automatically sends an instruction to the control module, and the control module switches oil working modes of an oil inlet and an oil return port of the hydraulic oil cylinder mutually, namely the oil inlet changes into oil and the oil return port changes into oil, so that the oil cylinder moves downwards; when the inner sliding frame moves downwards to the upper set point of the limit switch, the limit switch automatically sends an instruction to the control module, and the control module switches the working modes of oil in the oil inlet and the oil return port of the hydraulic oil cylinder mutually, namely the oil inlet is changed into oil, the oil return port is changed into oil return, so that the oil cylinder moves upwards, and the operation is repeated in a circulating mode to realize the automatic swabbing function.
7. A hydraulic workover rig according to any one of claims 1 to 3, wherein: the supporting leg module comprises an oil cylinder and inner and outer telescopic supporting legs; and hydraulic oil in the oil cylinder drives the inner telescopic supporting leg and the outer telescopic supporting leg to move so as to adjust the working width and the working height of the workover rig.
8. A hydraulic workover rig according to any one of claims 1 to 3, wherein: the multifunctional vehicle-mounted pumping unit further comprises a unit structure module, wherein the unit structure module comprises a vehicle frame, a hydraulic oil tank, a fuel tank and a battery pack, a protective cover is arranged around the vehicle frame, and the pumping module, the power module, the control module and the supporting leg module are all arranged on the vehicle frame.
9. a hydraulic workover rig according to claim 2, wherein: the power source is an electric motor and/or a diesel engine.
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CN201910762633.9A CN110566139A (en) | 2019-08-19 | 2019-08-19 | Hydraulic workover rig |
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