Automatic power-assisted balancing electric pumping unit

Abstract

The automatic power-assisted balancing electric pumping unit is composed of a frame, a bracket, a walking beam, a donkey head, an automatic booster, an automatic balancer, a large open gear and a protective cover, a reducer, a connecting rod, a stroke adjustment structure, an emergency brake, a balancing device, a guide rail, a well repair clearance device, a safety bolt, a brake device, a motor, an electronic controller, and a photovoltaic power generation device. The automatic booster and the automatic balancer are arranged on the walking beam frame, the large open gear and the protective cover, the reducer, and the brake device are arranged on the bracket, the well repair clearance device is arranged on the walking beam donkey head, the connecting rod connects the walking beam and the large open gear width, the emergency brake is installed on the balancing device and matches the guide rail, and the safety bolt is arranged on the guide rail. The electronic controller drives the motor to drive the reducer, the connecting rod, and the walking beam to reciprocate up and down, and drives the automatic booster to pull the booster block to reciprocate. The stroke adjustment and balance are controlled by the electronic controller according to the electrical parameter word. This pumping unit can greatly save electricity, reduce construction cost and maintenance cost, and is more convenient, safe and reliable to use.

Description

Technical Field

[0001] The invention relates to an oil pumping unit in oil field petroleum machinery, in particular to an oil pumping unit which has automatic power assist and automatic balancing and can be driven by photovoltaic power without using normal electricity and is highly energy-saving and environmentally friendly. Background Art

[0002] At present, the advantages of the walking beam pumping unit in oil fields are: strong and durable, no alternating load, and the potential energy of the balance block is gradually released and disappears during the rotation of the crank after the suspension point loses load; but the motor power configuration is large, the big horse pulls the small cart, the efficiency is low, the energy consumption is high, the amount of steel used is large, it is not environmentally friendly, the adjustment is troublesome and inconvenient to use, and the maintenance cost is high. Although some problems have been improved and improved recently, they still cannot be completely solved, such as: no energy saving, high steel consumption, low balance rate, no safety guarantee for the breakage of the steel rope and the bare rod, the need for a crane to assist in the adjustment and repair of the donkey head, the need for long-distance power distribution in the mountains and deserts, and high cost. There are many defects and shortcomings. Summary of the Invention

[0003] To overcome the numerous drawbacks and shortcomings of existing beam pumping units, the present invention provides a symmetrically balanced, automatically powered, and electrically powered pumping unit. The unit is equipped with an automatic booster, an automatic balancer, a photovoltaic power generation system for power-shortage zones, a workover clearance mechanism, a single- and double-link structure, a safety mechanism for the balancing device, a torque-enhancing mechanism, an intelligent electronic controller, a double-layer working platform, a speed reducer, and a large-gear, protective cover assembly, disassembly, and maintenance mechanism. This results in a simple, practical pumping unit with enhanced ease of use, lower maintenance costs, a quicker, safer, more reliable, and more durable design. The unit is highly efficient, energy-saving, environmentally friendly, and inexpensive, while also implementing digital control and intelligent management.

[0004] The present invention solves the technical solution: an automatic power-assisted balancing electric pumping unit, which consists of a frame, a bracket, a chassis, a walking beam, a donkey head, an automatic booster, an automatic balancer, a large-open tooth and a protective cover, a reducer, a connecting rod, a stroke adjustment structure, an emergency brake, a balancing device, a guide rail, a well repair and clearance device, a safety bolt, a brake device, a rotating shaft table, a roller, a working platform, a motor, an electronic controller, and a photovoltaic power generation device. The automatic booster and automatic balancer are both arranged on the walking beam and the frame; the large open gear and the tooth-shaped part of the protective cover are provided with corresponding labyrinth grooves on both sides, which are coaxially matched, and the grooves at the bottom of the protective cover are respectively provided with drainage holes and oil return holes, and are connected to the reducer and mounted on the bracket; the well repair donkey head giving way device is arranged on the walking beam and the donkey head, and its connecting shaft fastens the donkey head walking beam, and the steel rope wrapped on the drum connects the two ends of the donkey head; the connecting rod connects the walking beam and the large open gear width, and the spoke is provided with a stroke adjustment structure; the emergency brake is installed on the balancing device and is matched with the guide rail; the guide rail connects the base and the working platform; the safety bolt is set at the dead center of the rear donkey head of the guide rail; the brake device is mounted on the bracket corresponding to the brake structure on the pulley; the rotating shaft table is mounted on the frame above the large open gear; the roller is mounted on the bracket at the bottom of the reducer; the electronic controller is composed of a power automatic control system, an automatic booster control system, and an automatic balancing control system; the photovoltaic power generation device is connected to the motor and the electronic controller. The electronic controller drives the motor and drives the reducer, connecting rod, walking beam, and the oil pump connected to the steel rope on the donkey head to make up and down reciprocating motion to pump oil, and at the same time drives the automatic booster to pull the boost block to make reciprocating motion in the walking beam to assist; when the current difference of the up and down movement exceeds the specified value, the electronic controller automatically starts the fixed-distance adjustment of the balance block position; if the stroke needs to be adjusted, the position of the bearing seat installed on the wheel spoke is moved; when repairing the well and making way, when the rear donkey head is at the top dead center, the safety bolt is fixed to the balance device, the load is unloaded at the wellhead, and the brake shoe is locked on the guide rail at the same time under the action of the spring to implement double insurance, then two connecting shafts are removed and one is left, and the rotating drum pulls the donkey head to make way for the position difference; the stroke and balance are digitally controlled by the electronic controller according to the encoder, and the electronic controller is connected to the oil field central control room for remote control.

[0005] The overall frame structure is composed of a frame and a bracket connected to the base, a donkey head connected to the rocker, a rocker and a working platform connected to the frame, a reducer and a large open gear and a protective cover connected to the bracket, a connecting rod connecting the rocker and the large open gear, and a guide rail connecting the base and the working platform. It is a symmetrically balanced and highly stable and balanced structure.

[0006] The automatic booster is a device that runs the boost block from the center of the rocker to one end of the rocker, and repeats this back and forth operation. That is, when the crank of the automatic booster rotates from the top dead center to the bottom dead center, it must rotate by itself under the obstruction of the push shaft, and drive the gear, reel, and pulley to rotate. The steel rope wrapped around the reel pulls the boost block from the middle of the rocker to one end of the rocker. On the contrary, when the rocker rotates to the bottom dead center and then to the top dead center, the crank must rotate in the opposite direction under the obstruction of the other push shaft, and the steel rope pulls the boost block from one end of the rocker to the middle of the rocker. This continuous and repeated operation only requires 20% of the time the rocker runs up and down. Therefore, the rocker consumes very little electricity during most of its operation time, or even no electricity, achieving high energy saving. Example 2 is to remove the crank, push shaft, and spring and replace them with a motor, pulley, and limiter. The motor can be set on the rocker or on the boost block, and the limiter is set on the frame and inside the rocker. The rest of the facilities are exactly the same as Example 1. Figure 2 .

[0007] The automatic balancer is composed of a balancing block set in the middle of the front rocker, which is shifted a fixed distance toward the center of the rocker and one end of the rocker to adjust the balance. That is, when the current difference exceeds the programmed number when the donkey head moves up and down, the electronic controller automatically starts the motor encoder to adjust the distance and shift the balancing block to the set direction.

[0008] The large open gear and protective cover have completely changed the traditional power transmission structure. The large open gear width replaces the crank of the conventional walking beam machine. The stroke adjustment structure on the bearing seat connecting the wheel width is the load point, and the large open gear indexing diameter is the power point. The power point diameter is larger than the load point diameter, that is, the power torque is larger, so it is very labor-saving. In order to prevent the erosion of rain, snow, wind and sand on the large open gear, a labyrinth of concave and convex grooves are set on both sides of the tooth shape. Figure 3 ), the protective cover is divided into two halves and a drainage hole and an oil return hole are set at the bottom. The large open teeth are coaxially matched with the protective cover and connected to the reducer and installed on the bracket.

[0009] The connecting rod is a power transmission component that connects the large open gear width and the walking beam. When the walking beam head rotates, it does not touch the connecting rod, so the connecting rod is set as a double rod at one end and a single rod at the other end, and the two ends are connected to the bearing seat. It also solves the problem of scissors difference caused by the double connecting rod structure of the walking beam machine, concentrates power and saves materials.

[0010] The stroke adjustment mechanism is a mechanism for adjusting the length of the up and down stroke of the oil pump. Multiple sets of screw holes are designed at the bearing seat of the large open gear. When adjusting the stroke, one person turns the pulley, and the bearing seat slides and shifts to another set of screw holes. This is easy, safe and convenient, and does not require the assistance of a crane. It is fast and greatly saves costs.

[0011] The emergency brake of the balancing device is a safety device to prevent the steel rope and sucker rod from breaking and the counterweight from falling instantly. The crankshaft seats at both ends of the crankshaft are connected to the counterweight, the middle of the crankshaft is connected to the steel rope upwards, and connected to the spring downwards, and the spring is connected to the counterweight. When the steel rope or sucker rod breaks, the brake shoes at both ends of the crankshaft are linked under the action of the spring to clamp the guide rail immediately.

[0012] The counterweight of the balancing device connects the steel rope of the rear head to the load at the front head suspension point, balancing the load. The counterweight is cast from a high-density material into large, medium, and small pieces. Pulleys are located on both sides of the large piece to align with the guide rails, while the medium and small pieces are used to facilitate balancing during operations. When the load needs to be unloaded during oil well operations, the front head is at the bottom dead center, and the rear head at the top dead center. The safety bolts at the top dead center tighten the balancing device, simultaneously unloading the front head. Spring-loaded brake shoes clamp the guide rails for double safety.

[0013] The well repair clearance device is a structural device that makes space for the well repair machine for wellhead operations. When the rear donkey head rotates to the top dead center, the safety bolt tightens the balance device, and the suspension point load is unloaded at the bottom dead center of the front donkey head. Under the action of the emergency brake spring, the brake shoe clamps the guide rail, loosens the connecting shaft, removes two and leaves one, and the rotating drum pulls the donkey head to implement position difference clearance. No crane assistance is required, and people operating on the work platform are very safe, which greatly saves operating costs.

[0014] The brake device is a device that ensures safe operation and the safety of workers during operation. It consists of a screw nut structure or a brake shoe structure, both of which are mounted on the bracket in correspondence with the pulley. When the car needs to be stopped, the screw is rotated to tie the pulley or the energized brake shoe is used to clamp the pulley. Its braking force and cost are 3 times and 1 / 3 of those of a conventional walking beam crane, which is both durable and reduces costs.

[0015] The rotating shaft table and roller are a kind of lifting and shifting device. When the large open gear, protective cover and reducer need to be loaded, unloaded and shifted, the portable winch is installed on the rotating shaft table, lifted and rotated, and the bottom pad of the reducer is removed and dropped onto the roller for easy shifting.

[0016] The electronic controller comprises an automatic power control system, an automatic booster limiter control system, an automatic balancing encoder control system, and a highly integrated automatic adjustment program control system for electrical parameters such as current, voltage, and encoders. It is networked with the oilfield control center for digital intelligent remote control. The power control system adjusts to the changing load as the pumping unit's suspension point constantly changes during its operation. The power control system adjusts accordingly, consuming only the appropriate amount of power to avoid wasted work. This allows the power control system to drive the motor and the pump in a repetitive cycle, continuously pumping crude oil from underground to the surface. The automatic booster limiter system controls the reciprocating movement of the booster block within the rocker during the initial up-and-down movement of the rocker. Specifically, the limiter system at the top dead center of the rocker head activates the motor to rapidly move the booster block from the center to the bottom dead center of the rocker head. Conversely, the limiter system at the bottom dead center of the rocker head activates the motor to rapidly move the booster block from the bottom dead center to the center of the rocker head. This shift takes only 20% of the rocker head's up-and-down time. The automatic balancing system is that when the current difference of the up and down movement of the pumping unit exceeds the specified digital value, the automatic balancing control system encoder automatically starts to shift the balancing block by a fixed distance. That is, when the upstream current of the front donkey head is greater than the specified digital value of the downstream current, the automatic balancing control system encoder automatically starts to shift the balancing block by a fixed distance to the middle. Conversely, when the upstream current of the front donkey head is less than the specified digital value of the downstream current, the automatic balancing control system encoder automatically starts to shift the balancing block by a fixed distance to the outer end of the walking beam.

[0017] Photovoltaic power generation devices are power supply devices configured in remote desert areas with no conventional power supply. Because the cost of configuring conventional electricity in remote desert areas with no power supply is too high, and conventional walking beam pumps consume a lot of electricity, the automatic power-assisted balancing pump consumes only 20%-30% of the power of conventional walking beam pumps. Based on the power consumption of conventional walking beam pumps, the cost can be recovered within 6 years, and oil production can be carried out at extremely low or zero cost for the next 14 years.

[0018] The present invention has obvious and great advantages in terms of energy conservation and emission reduction, construction cost, steel consumption, service life, maintenance cost, operational safety and convenience, and oil production cost. First, the balancing rate of the symmetrical balancing structure is almost 100%. Second, the power control system consumes electricity according to the load, and consumes no electricity when it is unloaded. Third, the automatic booster shortens the full load movement time, that is, shortens the power consumption time by 80%. Fourth, the automatic balancer dynamically measures the imbalance digital value out of tolerance by the control system, and automatically starts the encoder to adjust the distance of the balancing block. Fifth, the large open teeth and protective cover change the traditional power transmission structure, and its power torque is more than twice that of all walking beam machines of the same type and size, so the motor power configuration is only 1 / 3 to 1 / 2 of all similar and sized walking beam machines, which is very energy-efficient. Sixth, the single and double connecting rod design solves the stubborn problem of scissors difference caused by double connecting rods. Seventh, the stroke adjustment structure solves the high cost problem of using a crane to assist in stroke adjustment, which is convenient, safe, time-saving and cost-saving. Eighth, the emergency brakes installed on the counterweights are aligned with the guide rails, preventing the counterweights from swaying in strong winds and ensuring the safety of both operators and operators in the event of a mast break. Ninth, the well repair clearance device is operated by one person on a work platform. The two connecting shafts are removed from the front head at the bottom dead center, and the rotating drum pulls the head to achieve differential clearance. This is both safe and fast, requiring no crane assistance, saving time, effort, and money. Tenth, the brake device features a simple, practical, and durable structure, boasting three times the braking force of similar units at 30% the cost of conventional units. It can brake and hold the vehicle in place at any time, ensuring safety. Eleventh, the integrated system for electronic speed control, electrical parameter data, and digital intelligent adjustment and control is connected to the oilfield control center for remote control, enabling intelligent digital management of the oilfield. Twelfth, the photovoltaic power generation system is ideal for remote, small-scale oilfields with limited wellheads and prohibitively expensive to install. Furthermore, in areas with power shortages abroad, photovoltaic power generation is an ideal solution for quick, efficient, and cost-effective operations. As mentioned above, the data obtained from the prototype test shows that manufacturing companies can save 60% of steel and reduce costs by 25%. Oil production companies can save electricity and reduce subsequent maintenance costs by 70%. The operation is more convenient, safe, reliable and durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of the automatic booster according to embodiment 2 of the present invention.

[0021] Figure 3 This is a schematic diagram of the large open teeth and protective cover labyrinth groove of the present invention

[0022] Figure 4 It is a structural schematic diagram of the balancing device of the present invention.

[0023] In the figure: base 1, frame 2, bracket 3, walking beam 4, donkey head 5, connecting rod 6, large open tooth 7, protective cover 8, stroke adjustment structure 9, reducer 10, pulley 11, motor 12, electronic controller 13, counterweight 14, roller skate 15, crankshaft seat 16, brake shoe 17, spring 18, crankshaft 19, guide rail 20, steel rope 21, working platform 22, photovoltaic power generation device 23, crank 24, thrust resistance shaft 25, gear 26, pulley 27, power block 28, steel rope 29, guide rail 30, roller 31, spring 32, motor 33, reel 34, reel 35, steel rope 36, connecting shaft 37, pad 38, roller 39, limiter 40, rotating shaft table 41, safety bolt 42, brake device 43, gear 44, balancing block 45, motor 46, roller 47, encoder 48, oil control lever 49. DETAILED DESCRIPTION

[0024] In the figure: the frame 2, the bracket 3, the guide rail 20, and the motor 12 are respectively mounted on the base 1, the large open gear 7 and the protective cover 8 are connected to the reducer 10 mounted on the bracket 3, and the two donkey heads 5 are connected to the two ends of the walking beam 4 and mounted on the top of the frame 2; the automatic booster is composed of a booster block 28, a crank 24, a gear 26, a rack 44, a steel rope 29, a pulley 27, a roller 31, a reel 34, a spring 32, and is set in the walking beam 4, the resistance thrust shaft 25 and the limiter 40 are set on the frame 2, the resistance thrust shaft 25 and the crank 24 are set on the same motion trajectory and match each other, the spring 32 connects the two resistance thrust shafts 25, when the donkey head 5 rotates from the top dead center to the bottom dead center, the crank 24 must rotate under the obstruction of the resistance thrust shaft 25, and drives the gear 26, the reel 34, and the pulley 27 to rotate, and the reel 34 The wound steel rope 29 pulls the booster block 28 from the middle of the rocker to one end of the rocker. Conversely, when the donkey head rotates to the bottom dead center and then rotates toward the top dead center, the crank 24 must rotate in the opposite direction due to the obstruction of the other thrust shaft 25. The steel rope 29 then pulls the booster block from one end of the rocker to the middle of the rocker, and this operation is repeated continuously. Example 2 removes the crank 24, thrust shaft 25, and spring 32, and adds a motor 33 installed on the rocker 4 or on the booster block 28, and a limiter 40 installed on the frame. The rest of the process is exactly the same as Example 1. That is, when the donkey head 5 rotates to the bottom dead center, the limiter 40 activates the motor 33 to pull the booster block 28 to the middle. Conversely, when the donkey head 5 rotates to the top dead center, the other limiter 40 activates the motor 33 to pull the booster block 28 to one end of the rocker, and this cycle repeats. The automatic balancer, consisting of a balancing weight 45, a motor 46, and an encoder 48, is installed within the rocker 4. When the digital imbalance value exceeds the tolerance, the control system of the electronic controller 13 dynamically detects and automatically activates the encoder 48 to adjust the balancing weight 45 by a fixed distance. The well repair head 5, which makes a shift, consists of a connecting shaft 37, a drum 35, and a steel rope 36. The connecting shaft 37 fastens the head 5 and the rocker 4. The drum 35 is installed in the middle of the front rocker. The steel rope 36 wrapped around the drum 35 connects the two ends of the head 5. When well repair operations are required, the front head is at the bottom dead center, the two connecting shafts 37 are removed, and the drum 35 is rotated to pull the head to make a shift. The connecting rod 6 is constructed with a double rod at one end and a single rod at the other, both connected to the bearing seat. The double rod is connected to the rocker 4, and the single rod is connected to the large open gear 7, which adjusts the stroke of the wheel. When stroke adjustment is required, the bearing seat is moved to another set of screw holes. The emergency brake is a safety device consisting of a crankshaft 19, crankshaft seat 16, brake shoes 17, and springs 18. Crankshaft seat 16 is mounted on counterweight 14. A steel rope 21 connects the crankshaft 19 to the counterweight 14, while springs 18 connect the crankshaft 19 and counterweight 14. Brake shoes 17 at both ends of the crankshaft 19 correspond to guide rails 20. When the steel rope 21 or the sucker rod 49 breaks, the springs 18 activate the brake shoes 17, which instantly clamp onto the guide rails 20. Counterweight 14 is cast from high-density materials like barite, iron ore, sand, and cement into large, medium, and small pieces. Pulleys 15 are attached to the outer edges of the large pieces, corresponding to the guide rails 20. The medium and small pieces are designed to facilitate well repairs and balance adjustments.Safety bolts 42 are located on guide rail 20 when the balancing device is at top dead center, corresponding to screw holes on crankshaft seat 16. Work platforms 22 are located on both sides of frame 2 and connected to guide rail 20. Brake devices 43, consisting of a screw-nut structure or brake shoe structure, are mounted on bracket 3 and mate with the brake structure on pulley 11. A rotating shaft platform 41 is mounted on frame 2 above the large open gear 7. A winch is mounted on rotating shaft platform 41 to facilitate the installation, removal, and relocation of the large open gear 7, protective device 8, and reducer 10. Rollers 39 and spacers 38 are mounted on bracket 3 at the bottom of reducer 10 to facilitate maintenance, installation, removal, and relocation of the reducer 10. The power control system consists of a motor 12 and an electronic controller 13. The motor can be a switched reluctance motor or a permanent magnet motor. The electronic controller is a highly integrated automatic control system that integrates a power automatic control system, an automatic booster limit control system, an automatic balancing encoder automatic control system, and an automatic adjustment program for electrical parameters such as current, voltage, and encoders. It is networked with the oilfield control center for digital intelligent remote control. Photovoltaic power generation devices 23 can be configured in power-deficient areas as driving power. Their structure consists of solar panels or cadmium telluride glass panels, inverters, batteries, controllers, and are connected to electronic controllers.

Claims

1. An automatic power-assisted balancing and electric pumping unit, which is composed of a frame, a bracket, a base, a walking beam, a donkey head, an automatic booster, an automatic balancer, a large open tooth and a protective cover, a reducer, a connecting rod, a stroke adjustment structure, an emergency brake, a balancing device, a guide rail, a well repair and clearance device, a safety bolt, a brake device, a rotating shaft table, a roller, a working platform, a motor, an electric controller, and a photovoltaic power generation device, and is characterized in that: The automatic booster and automatic balancer are both arranged on the walking beam and the frame; the large open gear and the protective cover tooth-shaped part are provided with corresponding labyrinth grooves on both sides, which are coaxially matched, and the grooves at the bottom of the protective cover are respectively provided with drainage holes and oil return holes, and are connected to the reducer and installed on the bracket; the well repair donkey head giving way device is arranged on the walking beam and the donkey head, and its connecting shaft fastens the donkey head and the walking beam, and the steel rope wound on the drum connects the two ends of the donkey head: the connecting rod connects the walking beam and the large open gear width, and the spoke is provided with a stroke adjustment structure; the emergency brake is installed on the balancing device and is matched with the guide rail; the guide rail connects the base and the working platform; the safety bolt is arranged at the dead center of the rear donkey head of the guide rail; the brake device is installed on the bracket corresponding to the brake structure on the pulley: the rotating shaft table is installed on the frame above the large open gear; the roller is installed on the support at the bottom of the reducer On the rack: The photovoltaic power generation device is connected to the motor and the electronic controller: The stroke adjustment and balance are controlled by the electronic controller according to the electrical parameter word. The electronic controller drives the motor and drives the reducer, connecting rod, rocker, and the oil pump connected to the steel rope on the donkey head to make up and down reciprocating motion to pump oil, and at the same time drives the automatic booster to pull the auxiliary block to make reciprocating motion in the rocker to assist; when the current difference of the up and down movement exceeds the specified value, the electronic controller automatically starts to adjust the position of the balance block to achieve balance: if the stroke needs to be adjusted, move the screw hole position of the bearing seat on the wheel spoke; when the well repair gives way, the safety bolt is fixed to the balance device at the top dead center of the rear donkey head, and the load is unloaded. Under the action of the spring, the brake shoe locks the balance device at the same time to implement double insurance, and then removes two connecting shafts and leaves one connecting shaft, and the rotating reel pulls the front donkey head to implement position difference giving way; The automatic booster assembly is composed of a booster block, a crank, a gear, a rack, a steel rope, a pulley, a roller, a reel, a thrust-blocking shaft, a spring, a limiter, and a motor, which are respectively arranged inside and outside the walking beam and on the frame. The crank corresponds to the thrust-blocking shaft and the two thrust-blocking shafts are elastically connected. The automatic balancer is composed of a motor, gear, rack, pulley, balance block, and guide rail, all of which are installed in the walking beam. The electronic controller automatically starts the motor according to the digital difference of the up and down movement current to drive the balance block to move a fixed distance in the required direction.

2. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The well repair donkey head giving way device is composed of a connecting shaft, a drum, and a steel rope. The connecting shaft fixes the walking beam and the donkey head. The drum is installed on the walking beam at one side of the wellhead. The two ends of the steel rope wound on the drum are connected to the two ends of the donkey head.

3. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The connecting rod structure is composed of bearing seats installed at both ends of the connecting rod. The bearing seats are respectively connected to the rocker and the large open gear wheel spoke stroke adjustment structure. The one connected to the rocker is a double connecting rod to facilitate the donkey head to rotate without collision, and the one connected to one end of the large open gear wheel spoke is a single connecting rod.

4. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The balancing device consists of two parts: a counterweight and an emergency brake mounted on the counterweight. The counterweight is cast from a material with a high specific gravity into large, medium and small pieces. The outer edge of the large piece is equipped with a pulley that corresponds to the guide rail, and the medium and small pieces are convenient for well repair and balance adjustment. The emergency brake is composed of a crankshaft, a crankshaft seat, a spring, and a brake shoe. The crankshaft seat is mounted on the counterweight, the brake shoe is mounted on the crankshaft seat and corresponds to the guide rail, and the spring connects the crankshaft and the counterweight.

5. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The safety bolt used for well repair is set on the guide rail when the balancing device is at the upper dead center. During repair, the safety bolt fixes the balancing device on the guide rail at the upper dead center and then the hanging point load is moved to the wellhead. At this time, the brake shoe of the emergency brake automatically locks the balancing device on the guide rail under the action of the spring, implementing double insurance.

6. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The rotating shaft table and roller are installed on the frame and bracket respectively. When loading and unloading the large open gear and protective cover, use a portable winch installed on the rotating shaft table to lift and shift. When loading and unloading the reducer, remove the pad at the bottom of the reducer, and the reducer falls on the roller, and the reducer is easily moved: no crane assistance is required.

7. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: The electronic controller is composed of a power automatic control system, an automatic booster control system, and an automatic balance control system, and is connected to the oilfield control center to implement digital intelligent remote control.

8. The automatic power-assisted balancing electric pumping unit according to claim 1 is characterized in that: Photovoltaic power generation devices can be deployed in power-deficient areas or remote regions. They are composed of solar panels or cadmium telluride glass panels, inverters, batteries, controllers, and are connected to motors and electronic controllers. They can operate normally even on rainy days.

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