CN113006691A - Emergency and power compensation system and method for hydraulic energy storage vehicle-mounted drilling and repairing machine - Google Patents
Emergency and power compensation system and method for hydraulic energy storage vehicle-mounted drilling and repairing machine Download PDFInfo
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- CN113006691A CN113006691A CN202110420521.2A CN202110420521A CN113006691A CN 113006691 A CN113006691 A CN 113006691A CN 202110420521 A CN202110420521 A CN 202110420521A CN 113006691 A CN113006691 A CN 113006691A
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- 238000005553 drilling Methods 0.000 title claims abstract description 64
- 238000004146 energy storage Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 30
- 230000005540 biological transmission Effects 0.000 claims description 24
- 230000001502 supplementing effect Effects 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 5
- 239000013589 supplement Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 241001074085 Scophthalmus aquosus Species 0.000 claims 1
- 238000011161 development Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 239000000295 fuel oil Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/04—Supports for the drilling machine, e.g. derricks or masts specially adapted for directional drilling, e.g. slant hole rigs
- E21B15/045—Hydraulic, pneumatic or electric circuits for their positioning
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B19/008—Winding units, specially adapted for drilling operations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B19/02—Rod or cable suspensions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to an emergency and power compensation system and method of a hydraulic energy storage vehicle-mounted drilling and repairing machine. The method comprises the following steps: the hydraulic motor is also used as an emergency power source and is driven by an energy storage unit or an external power source; in the operation process, the kinetic energy transmitted by the drilling tool is converted into the hydraulic energy of the energy storage unit, and when the operation is lifted, the energy storage unit applies work together, so that the rated power of the required motor is reduced. The invention obviously reduces the power of the main motor, has high energy utilization rate, and has no tail gas emission and no noise in the operation process.
Description
Technical Field
The invention relates to an emergency and power compensation system and method for a hydraulic energy storage vehicle-mounted drilling and repairing machine, and belongs to the technical field of oil drilling and development.
Background
The vehicle-mounted drilling and repairing machine is a special petroleum exploration device for well drilling and repairing, and is mainly used for lifting and issuing of drill rods, oil pipes and oil pumping rods, repairing of mineshafts, windowing and other large and small repairing operations. At present, the vehicle-mounted drilling and repairing machine mostly uses a diesel engine as a power source, and has low efficiency and serious environmental pollution. With the deep development of oil exploration and development, at present, a plurality of well drilling positions go deep into personnel-intensive areas such as residential areas, commercial areas and farmlands, and the problem of large noise of the traditional vehicle-mounted drilling and repairing machine cannot be ignored.
The drilling rig is special in working condition, and in the complete lifting and lowering operation process, the lifting operation is an energy consumption stage, and the lowering operation stage is an acting stage. Particularly, in the down-sending operation process, the drilling rig is continuously down-sent by the drilling rig, the diesel engine is in the idle load stage for a long time, fuel oil is wasted more, the phenomenon of incomplete combustion of the fuel oil in the diesel engine is serious due to the idle load operation of the diesel engine, and the emission pollution is high.
The vehicle-mounted drilling and repairing machine is used for processing underground drilling tools, the drilling and repairing machine is required to be operated continuously, if the traditional diesel engine fails to be solved in time, underground accidents such as drilling tool falling, shaft collapse and the like can be caused, and serious accidents such as well position abandonment, blowout and the like can be caused even if the vehicle-mounted drilling and repairing machine is not processed properly.
The traditional workover rig winch uses a hydraulic disc brake and a pneumatic water-cooling auxiliary brake, the hydraulic disc brake is provided with an independent hydraulic station, the water-cooling auxiliary brake needs an additional heat dissipation system and a cooling water tank, and the whole system is complex.
Based on the problems of the current vehicle-mounted drilling and repairing machine, a novel vehicle-mounted drilling and repairing machine suitable for the current drilling exploration and development needs to be developed.
Disclosure of Invention
In order to solve the technical problems, the invention provides an emergency and power compensation system and method of a hydraulic energy storage vehicle-mounted drilling and repairing machine, and the specific technical scheme is as follows:
the emergency and power compensation system of the hydraulic energy storage vehicle-mounted drilling and repairing machine comprises a vehicle-mounted chassis, and a derrick, a distribution box, a hydraulic station, an energy storage unit, a main motor, a gear transmission box, an independent air compressor, an oil supplementing pump, a main hydraulic motor, a winch, a hydraulic disc brake, an air-cooled radiator, an electric control unit and a main operating platform which are integrated on the vehicle-mounted chassis, wherein a transportation unit, namely a wheel system, is arranged below the vehicle-mounted chassis and is used for vehicle traveling;
a drilling machine is arranged at the lower end of the descending derrick;
the transportation unit uses a diesel engine as a power source;
the distribution box gets electricity from the well site transformer;
the energy storage unit stores hydraulic energy and supplies the hydraulic energy to the hydraulic station, and the hydraulic station is used for providing power for the winch and the derrick;
the winch uses a main motor as main power, and hydraulic energy of an energy storage unit is used as auxiliary power;
the gear transmission case is of a single-input double-output structure and respectively provides power for the winch and the oil replenishing pump,
the independent air compressor works by commercial power;
the air-cooled radiator driven by the main hydraulic motor radiates heat;
the hydraulic disc brake is a main brake of the winch, and the hydraulic motor brake is an auxiliary brake of the winch;
the electric control unit is used for detecting the speed of the winch and controlling the rotating speed and the torque of the motor so as to realize the synchronization of the motor and the main hydraulic oil pump;
the main operating platform is used for controlling the main motor, the main hydraulic motor and the hydraulic disc brake and is a control center of the whole machine.
Further, the output shaft of the main motor is connected with a gear transmission box, one end of the gear transmission box drives a winch through a chain transmission mechanism, the other end of the gear transmission box is provided with a pneumatic control clutch device I, and the outer end of the pneumatic control clutch device I is provided with an oil supplementing pump; when the drilling machine is dragged reversely and the pressure of the energy accumulator is insufficient, the oil supplementing pump is started to supplement energy for the energy accumulator;
furthermore, two ends of the winch are respectively provided with a pneumatic clutch device II, the chain transmission mechanism is positioned on the outer side of the pneumatic clutch device II, the other end of the winch is provided with a main hydraulic motor which is positioned on the outer side of the pneumatic clutch device II,
the main hydraulic motor is powered by an energy storage unit.
Further, the energy storage unit comprises 6-8 high-power hydraulic energy accumulators.
An emergency and power compensation method for a hydraulic energy storage vehicle-mounted drilling and repairing machine comprises the following steps:
the hydraulic motor is also used as an emergency power source and is driven by an energy storage unit or an external power source; in the operation process, the kinetic energy sent by the drilling tool is converted into the hydraulic energy of the energy storage unit, and when the operation is promoted, the energy storage unit applies work together, so that the rated power of a required motor is reduced;
when the drilling machine is in a working condition of lifting the drilling tool, the pneumatic control clutch device I is disengaged, the pneumatic control clutch device II is engaged, and the motor and the main motor drive the winch to lift;
when the drilling machine is in a working condition of lowering the drilling tool, the pneumatic control clutch device I is engaged, the pneumatic control clutch device II is engaged, the winch reversely drags the main hydraulic motor to drive the oil replenishing pump, the oil replenishing pump consumes kinetic energy of the winch, the oil replenishing pump assists in playing a role in braking and decelerating, and meanwhile, the oil replenishing pump charges the energy storage device.
The invention has the beneficial effects that:
(1) the power source of the vehicle-mounted drilling and repairing machine uses a main hydraulic motor driven by a motor as main power, the energy utilization rate is high, no tail gas is discharged and no noise is generated in the operation process, the environmental protection problem is solved, and the vehicle-mounted drilling and repairing machine can normally operate in a residential area, a commercial area and other personnel-intensive areas.
(2) The hydraulic energy storage device is matched with a high-power hydraulic energy storage device, the hydraulic energy storage device accumulates energy when the drilling tool is lowered, when the drilling tool is lifted, the hydraulic energy storage device and the main motor work simultaneously, and the hydraulic energy storage device is used as a power supplement device of the main motor, so that the power of the main motor can be obviously reduced, and the power of the main motor is matched with a well site transformer.
(3) The large-power hydraulic energy storage device is matched, so that the energy consumption can be obviously reduced, and particularly, when the drilling tool is continuously lowered, the electric energy consumption of the main motor can be reduced by 50-80%.
(4) The vehicle-mounted drilling rig winch is formed by a hydraulic motor brake and a hydraulic disc brake, wherein the hydraulic disc brake is a winch main brake, the hydraulic motor brake is a winch auxiliary brake, and compared with a conventional drilling winch, the vehicle-mounted drilling rig winch does not need a water-cooling auxiliary brake and a cooling water tank, does not need an independent hydraulic disc brake power station, is remarkably reduced in weight and volume, and is remarkably improved in drilling rig maneuverability.
(5) The matched high-power hydraulic energy storage device can be used as emergency power under the condition that the motor is damaged and used for lowering the drilling tool to a wellhead;
(6) external hydraulic pressure source interface is reserved to supporting hydraulic power station, when the motor damages and can't maintain for a long time, can switch on independent hydraulic pressure station, uses hydraulic pressure station to promote and transfers the drilling tool, thoroughly solves emergent problem.
Drawings
Figure 1 is a side view of the present invention,
figure 2 is a top view of the present invention,
in the figure: the system comprises a chassis, a derrick, a power distribution box, a hydraulic station, an energy storage unit, a main motor, a transmission box, an independent air compressor, an independent oil supply pump, a main hydraulic motor, a winch, a hydraulic disc brake, an air cooling radiator, an electric control unit, a main operating platform, a pneumatic control clutch device I and a pneumatic control clutch device II, and is characterized by comprising the following components of 1 part, 2 parts, a derrick, 3 parts, a power distribution box, 4 parts, a hydraulic station, 5 parts, an energy storage unit, 6 parts, a main motor, 7 parts, a transmission box, 8.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, the emergency and power compensation system of the hydraulic energy storage vehicle-mounted drilling and repairing machine of the present invention includes a vehicle-mounted chassis 1, a derrick 2 integrated on the vehicle-mounted chassis 1, a distribution box 3, a hydraulic station 4, an energy storage unit 5, a main motor 6, a gear transmission box 7, an independent air compressor 8, an oil replenishment pump 9, a main hydraulic motor 10, a winch 11, a hydraulic disc brake 12, an air-cooled radiator 13, an electric control unit 14 and a main operating platform 15, wherein a transportation unit, i.e., a wheel system, is disposed below the vehicle-mounted chassis 1 and used for vehicle traveling, and is shown by using 8 wheel systems as an example in the figure.
When the invention works, the transportation unit uses the diesel engine as a power source, walks to a specified place of work, and puts down the ground supporting feet at the bottom of the vehicle-mounted chassis 1, thereby ensuring the stability of a vehicle-mounted system. The distribution box takes electricity from the well site transformer. The cylinder rotates and rises the derrick, the drilling machine is vertically aligned to the position to be drilled downwards, and the drilling machine arranged at the lower end of the derrick 2 is lowered. The hydraulic station is used for providing power for the winch and the derrick, and the energy storage unit 5 stores hydraulic energy and supplies the hydraulic station with the hydraulic energy.
The winch 11 uses the main motor 6 as the main power and the hydraulic energy of the energy storage unit 5 as the auxiliary power. Two ends of the winch 11 are respectively provided with a pneumatic control clutch device II 17, the chain transmission mechanism is located on the outer side of the pneumatic control clutch device II 17, the other end of the winch 11 is provided with a main hydraulic motor 10, the main hydraulic motor 10 is located on the outer side of the pneumatic control clutch device II 17, and the main hydraulic motor 10 is powered by an energy storage unit 5.
The output shaft of the main motor 6 is connected with a gear transmission box 7, and the gear transmission box is of a single-input double-output structure and respectively provides power for the winch and the oil replenishing pump. One end of the gear transmission box 7 drives the winch 11 through a chain transmission mechanism, the other end of the gear transmission box is provided with a pneumatic clutch device I16, and the outer end of the pneumatic clutch device I16 is provided with an oil supplementing pump 9 and an oil supplementing pump 9; when the drilling machine is dragged reversely and the pressure of the energy accumulator is insufficient, the oil supplementing pump is started to supplement energy for the energy accumulator.
The independent air compressor 8 is connected with the on-site commercial power to work.
The air-cooled radiator driven by the main hydraulic motor dissipates heat.
The hydraulic disc brake is a main brake of the winch, and the hydraulic motor brake is an auxiliary brake of the winch;
the electric control unit is used for detecting the speed of the winch and controlling the rotating speed and the torque of the motor so as to realize the synchronization of the motor and the main hydraulic oil pump;
the main operating platform is used for controlling the main motor, the main hydraulic motor and the hydraulic disc brake and is a control center of the whole machine.
The energy storage unit comprises 6-8 high-power hydraulic energy accumulators.
An emergency and power compensation method for a hydraulic energy storage vehicle-mounted drilling and repairing machine comprises the following steps:
the hydraulic motor is also used as an emergency power source and is driven by an energy storage unit or an external power source; in the operation process, the kinetic energy sent by the drilling tool is converted into the hydraulic energy of the energy storage unit, and when the operation is promoted, the energy storage unit applies work together, so that the rated power of a required motor is reduced;
when the drilling machine is in a working condition of lifting the drilling tool, the pneumatic control clutch device I16 is disengaged, the pneumatic control clutch device II (17) is engaged, and the motor and the main motor drive the winch to lift;
when the drilling machine is in a working condition of lowering the drilling tool, the pneumatic control clutch device I16 is engaged, the pneumatic control clutch device II (17) is engaged, the winch reversely drags the main hydraulic motor 10 to drive the oil supplementing pump, the oil supplementing pump consumes kinetic energy of the winch, the oil supplementing pump assists in playing a role in braking and decelerating, and meanwhile, the oil supplementing pump charges the energy storage device.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (5)
1. Emergent and power compensation system of on-vehicle brill of hydraulic pressure energy storage machine, its characterized in that: the energy-saving hydraulic system comprises a vehicle-mounted chassis (1), a derrick (2), a distribution box (3), a hydraulic station (4), an energy storage unit (5), a main motor (6), a gear transmission box (7), an independent air compressor (8), an oil supplementing pump (9), a main hydraulic motor (10), a winch (11), a hydraulic disc brake (12), an air cooling radiator (13), an electric control unit (14) and a main operating platform (15), wherein the derrick (2), the distribution box (3), the hydraulic station (4), the energy storage unit, the main motor (6), the gear transmission box (7), the independent air compressor (8), the;
the drilling machine is arranged at the lower end of the descending derrick (2);
the transportation unit uses a diesel engine as a power source;
the distribution box gets electricity from the well site transformer;
the energy storage unit (5) stores hydraulic energy and supplies the hydraulic energy to a hydraulic station, and the hydraulic station is used for providing power for the winch and the derrick;
the winch (11) uses the main motor (6) as main power, and hydraulic energy of the energy storage unit (5) as auxiliary power;
the gear transmission case is of a single-input double-output structure and respectively provides power for the winch and the oil replenishing pump,
the independent air compressor (8) works by commercial power;
the air-cooled radiator driven by the main hydraulic motor radiates heat;
the hydraulic disc brake is a winch main brake, and the hydraulic motor brake is a winch auxiliary brake;
the electric control unit is used for detecting the speed of the winch and controlling the rotating speed and the torque of the motor so as to realize the synchronization of the motor and the main hydraulic oil pump;
the main operating platform is used for controlling the main motor, the main hydraulic motor and the hydraulic disc brake and is a control center of the whole machine.
2. The emergency and power compensation method of the hydraulic energy storage vehicle-mounted drilling and repairing machine according to claim 1, characterized in that: the output shaft of the main motor (6) is connected with a transmission case (7), one end of the transmission case (7) drives a winch (11) through a chain transmission mechanism, the other end of the transmission case is provided with a pneumatic control clutch device I (16), and the outer end of the pneumatic control clutch device I (16) is provided with an oil supplementing pump (9); when the drilling machine is dragged reversely and the pressure of the energy accumulator is insufficient, the oil supplementing pump is started to supplement energy for the energy accumulator.
3. The emergency and power compensation method of the hydraulic energy storage vehicle-mounted drilling and repairing machine according to claim 1, characterized in that: two ends of the winch (11) are respectively provided with a pneumatic control clutch device II (17), the chain transmission mechanism is positioned on the outer side of the pneumatic control clutch device II (17), the other end of the winch (11) is provided with a main hydraulic motor (10), the main hydraulic motor (10) is positioned on the outer side of the pneumatic control clutch device II,
the main hydraulic motor (10) is powered by an energy storage unit (5).
4. The emergency and power compensation method of the hydraulic energy storage vehicle-mounted drilling and repairing machine according to claim 1, characterized in that: the energy storage unit comprises 6-8 high-power hydraulic energy accumulators.
5. An emergency and power compensation method for a hydraulic energy storage vehicle-mounted drilling and repairing machine is characterized by comprising the following steps: the method comprises the following steps:
the hydraulic motor is also used as an emergency power source and is driven by an energy storage unit or an external power source; in the operation process, the kinetic energy sent by the drilling tool is converted into the hydraulic energy of the energy storage unit, and when the operation is promoted, the energy storage unit applies work together, so that the rated power of a required motor is reduced;
when the drilling machine is in a working condition of lifting the drilling tool, the pneumatic control clutch device I (16) is disengaged, the pneumatic control clutch device II (17) is engaged, and the motor and the main motor drive the winch to lift;
when the drilling machine is in the working condition of lowering the drilling tool, the pneumatic control clutch device I (16) is engaged, the pneumatic control clutch device II (17) is engaged, the winch reversely drags the main hydraulic motor (10) to drive the oil supplementing pump, the oil supplementing pump consumes the kinetic energy of the winch, the oil supplementing pump assists in playing a role in braking and decelerating, and meanwhile, the oil supplementing pump charges energy for the energy storage device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110420521.2A CN113006691A (en) | 2021-04-19 | 2021-04-19 | Emergency and power compensation system and method for hydraulic energy storage vehicle-mounted drilling and repairing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110420521.2A CN113006691A (en) | 2021-04-19 | 2021-04-19 | Emergency and power compensation system and method for hydraulic energy storage vehicle-mounted drilling and repairing machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738600A (en) * | 2024-02-19 | 2024-03-22 | 胜利油田康贝石油工程装备有限公司 | Energy recovery type range-extending hydraulic network electric workover rig and use method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117738600A (en) * | 2024-02-19 | 2024-03-22 | 胜利油田康贝石油工程装备有限公司 | Energy recovery type range-extending hydraulic network electric workover rig and use method thereof |
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