Walking beam type energy-saving pumping unit with gravity compensation mechanism and turbine power generation

Abstract

A walking beam type energy-saving pumping unit with a gravity compensation mechanism and turbine power generation mainly comprises a walking beam type pumping unit base, a solar power generation device, the gravity compensation mechanism, a horse head, a pumping rod, a pumping well and the like. In the working process, the gravity compensation mechanism can counteract the driving torque through potential energy release of the balancing weight; the turbine energy storage power generation device is provided with a turbine in a pumping well cavity to form a double-stroke fluid kinetic energy electromagnetic capturing mechanism; the solar power generation device efficiently absorbs solar radiation and converts the solar radiation into electric energy, and the load requirement for a traditional power grid is remarkably reduced. The energy consumption of the oil pumping unit can be effectively reduced, the stored energy of the oil pumping unit is increased, so that the dependence on a power grid is reduced, the energy safety in China is guaranteed, and wide application prospects are achieved.

Description

Technical Field

[0001] The present invention relates to a beam pumping unit for energy saving, and more particularly to a beam pumping unit for energy saving with a gravity compensation mechanism and turbine power generation. Background Art

[0002] At present, the beam pumping unit is the core lifting equipment for global oilfield exploitation, with an application proportion of over 90%. The annual power consumption per unit can reach 25,000 to 80,000 kWh, accounting for about 30% - 40% of the total energy consumption of the oilfield. Although it has long dominated due to advantages such as stable structure and convenient maintenance, its system efficiency is generally lower than 25%, and in some advanced regions, it is only close to 30%. Moreover, there are significant energy waste problems, mainly manifested as strong dependence on the power grid, inefficient operation with an average motor load rate of less than 30%, and the "reverse power generation" phenomenon caused by periodic alternating loads.

[0003] Although traditional energy-saving measures such as reactive power compensation and variable frequency speed regulation for beam pumping units in China can partially alleviate the problems, due to high transformation costs, insufficient energy feedback technology or adaptability defects, it is difficult to achieve global optimization of power grid consumption. Therefore, there is an urgent need to find new ways to reduce the energy consumption of pumping units. As is well known, the current beam pumping units mainly rely on power grid power generation. If the power grid consumption of pumping units can be comprehensively reduced, the CO2 emissions caused by power generation can be reduced, and the greenhouse effect and environmental pollution can also be reduced. The current utilization rate of the "reverse power generation" energy of beam pumping units is less than 5%, resulting in a large amount of potential energy being converted into heat energy or distorted electric energy that cannot be connected to the grid. In order to further improve energy utilization efficiency and rationally use the energy of each part of the beam pumping unit, so as to achieve the purpose of saving energy, it is necessary to design a beam pumping unit for energy saving with a gravity compensation mechanism and turbine power generation. Summary of the Invention

[0004] In order to improve the energy utilization efficiency of the beam pumping unit and overcome the defects of the prior art, the present invention designs a beam pumping unit for energy saving with a gravity compensation mechanism and turbine power generation.

[0005] A beam pumping unit with a gravity compensation mechanism and turbine power generation, comprising: a beam pumping unit base, a solar power generation device, a connecting rod, a cross beam, a beam, a gravity compensation mechanism, a pony head, a sucker rod, an oil well, a support, a power conversion device, a motor, a motor fixing frame, a lead screw, a counterweight, a central shaft, a slide rail, a speed reducer, an output wheel, a speed reducer output shaft, a crank pin, a crank, a belt, a pulley, a pulley shaft, a well rod, a well pipe, a first coil, a second coil, a second turbine, a first turbine, an oil outlet valve, a first valve ball, an oil inlet valve, a second valve ball, an annular magnet built into the turbine, a photovoltaic panel, a longitudinal rotating shaft, a support plate, a horizontal rotating shaft, and a solar power generation device base. The pony head is connected to one side of the beam, the cross beam is connected to the other side of the beam, a central shaft is installed at a position in the middle of the beam and biased towards the pony head, and the gravity compensation mechanism is installed on the upper part of the beam. Among them, the motor is fixed through the motor fixing frame and drives the lead screw to rotate. The counterweight fits on the slide rail and moves as the lead screw rotates. One end of the sucker rod is connected to the pony head and the other end is connected to the oil well. The top of the support is fixed on the central shaft and the bottom is supported on the beam pumping unit base, thereby supporting the beam.

[0006] The power conversion device is connected to the cross beam by a connecting rod. In the power conversion device, the crank is connected to the other end of the connecting rod through a crank pin. The speed reducer output shaft fixes the output wheel and the crank together. The belt links the output wheel and the pulley. The pulley is concentric with the pulley shaft, and they are all fixed on the speed reducer.

[0007] The well pipe is inside the oil well. One end of the well pipe is the well rod. The first coil, the second coil, the oil outlet valve, and the oil inlet valve are embedded inside the well pipe. The first turbine and the second turbine are respectively surrounded by the first coil and the second coil. The first valve ball and the second valve ball are respectively embedded inside the oil outlet valve and the oil inlet valve. There are annular magnets built into the turbine between the second coil and the second turbine, and between the first coil and the first turbine.

[0008] The solar power generation device base in the solar power generation device is fixed on the beam pumping unit base. The horizontal rotating shaft is embedded in the center of the solar power generation device base. The longitudinal rotating shaft and the horizontal rotating shaft are respectively connected to both ends of the support plate. The photovoltaic panel is connected to the support plate through the longitudinal rotating shaft.

[0009] A method for using a beam pumping unit with a gravity compensation mechanism and turbine power generation includes the following steps: The pumping unit is integrally installed on the beam pumping unit base. In addition to electric drive, it is driven by a dual-axis tracking structure of a solar power generation device to drive the photovoltaic power generation panel to capture light energy for auxiliary power supply. During the entire oil production process, first, through the power conversion device, the circular motion of the crank is converted into the reciprocating oil production action of the beam and the donkey head with the help of the crank pin, connecting rod, and crossbeam. Then, the gravity compensation mechanism is adopted to adjust the displacement of the counterweight block through the lead screw to achieve dynamic balance of the stroke. During the upstroke, the counterweight moves backward to reduce the driving torque, and at the same time, the oil outlet valve opens to drive the second turbine to generate electricity; during the downstroke, it moves forward to increase the potential energy reserve. At this time, the oil inlet valve opens to drive the first turbine to generate electricity, forming a dual-stroke fluid kinetic electromagnetic capture mechanism. The entire set of systems constructs a complete energy closed-loop regulation system through a two-dimensional energy management framework of solar power supply and downhole fluid power generation, significantly improving the energy self-sufficiency rate and operation energy efficiency.

[0010] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The present invention utilizes the gravity compensation mechanism to offset the driving torque through the release of potential energy of the counterweight block during the upstroke stage of the pumping unit. During the downstroke, the counterweight block moves reversely along the guide rail to complete potential energy storage, forming a potential energy-kinetic energy conversion mechanism. This energy regulation mode effectively reduces the motor output power requirement, realizes the closed-loop recovery of mechanical energy consumption, and significantly improves the overall energy efficiency of the system.

[0011] 2. The present invention utilizes turbine energy storage and power generation. In the pumping well cavity, a turbine power generation device is installed. During the upstroke, the oil outlet valve opens to drive the second turbine to generate electricity, and during the downstroke, the oil inlet valve opens to drive the first turbine to generate electricity, forming a dual-stroke fluid kinetic electromagnetic capture mechanism, which is beneficial to reducing the overall energy consumption of the system.

[0012] 3. The present invention adopts a solar power generation device to efficiently absorb solar radiation, fully release the power generation potential of the photovoltaic system, and realize the on-site consumption and utilization of electric energy, significantly reducing the load demand on the traditional power grid, and thus effectively reducing indirect carbon emissions, with broad industrial application prospects. Description of the Drawings

[0013] Figure 1 It is the overall external view schematic diagram of the present invention patent.

[0014] Figure 2 It is the schematic diagram of the solar power generation device of the present invention patent.

[0015] Figure 3 It is the schematic diagram of the power conversion device of the present invention patent.

[0016] Figure 4 It is the schematic diagram of the gravity compensation mechanism of the present invention patent.

[0017] Figure 5 It is the internal detail view of the pumping well of the present invention patent.

[0018] In the figure: 1. Beam pumping unit base, 2. Solar power generation device, 3. Connecting rod, 4. Cross beam, 5. Beam, 6. Gravity compensation mechanism, 7. Walking beam, 8. Sucker rod, 9. Oil production well, 10. Support, 11. Power conversion device, 12. Motor, 13. Motor fixing bracket, 14. Lead screw, 15. Counterweight, 16. Central shaft, 17. Slide rail, 18. Reducer, 19. Output wheel, 20. Reducer output end shaft, 21. Crank pin, 22. Crank, 23. Belt, 24. Belt pulley, 25. Belt pulley shaft, 26. Well rod, 27. Well pipe, 28. First coil, 29. Second coil, 30. Second turbine, 31. First turbine, 32. Oil outlet valve, 33. First valve ball, 34. Oil inlet valve, 35. Second valve ball, 36. Annular magnet inside the turbine, 37. Photovoltaic power generation panel, 38. Longitudinal rotating shaft, 39. Support plate, 40. Horizontal rotating shaft, 41. Solar power generation device base. Specific implementation mode

[0019] The present invention will be further described below with reference to the accompanying drawings: Combined with Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown in

[0020] Combined with Figure 1 , Figure 2As shown in the figure, the entire device is installed on the beam pumping unit base 1. The bracket 10 installed on the beam pumping unit base 1 is connected to the beam 5 through the central shaft 16 to support the entire beam pumping unit. The solar power generation device 2 installed on one side of the beam pumping unit base 1 consists of a horizontal rotating shaft 40 installed on the solar power generation device base 41, and the horizontal rotating shaft 40 is connected through the support plate 39 to the photovoltaic power generation panel 37 installed on the longitudinal rotating shaft 38. The entire device captures solar energy during the working process to supply energy to the pumping unit. The power conversion device 11 converts the circular motion of the crank 22 into the reciprocating motion of the beam 5 and the walking beam 8 supported by the bracket 11 through the connecting rod 3 and the cross beam 4. At the same time, the walking beam 7 drives the sucker rod 9 to complete the oil production operation in the oil well 9. Among them, the gravity compensation mechanism 6 improves the energy utilization rate of the pumping unit during the operation of the pumping unit.

[0021] Combined with Figure 3 As shown in the figure, when the speed reducer 18 outputs from the output shaft 20 of the speed reducer after being decelerated by the internal gear oil, the output shaft 20 of the speed reducer drives the crank 22 to rotate. The belt 23 is installed on the pulley 24 located on the pulley shaft 25 and the output wheel 19 for transmission. One end of the connecting rod 3 is connected to the crank pin 21, and the other end is connected to the cross beam 4. The cross beam 4 drives the beam 5 to make a reciprocating motion.

[0022] Combined with Figure 4 As shown in the figure, during the oil production operation of the pumping unit, during the upstroke process, the motor 12 installed on the motor fixing bracket 13 drives the lead screw 14, so that the counterweight 15 moves backward along the slide rail 17. During this process, the power arm is increased, thus achieving the effect of saving effort; during the downstroke process, the motor 12 installed on the motor fixing bracket 13 drives the lead screw 14, so that the counterweight 15 moves forward along the slide rail 17, increasing the gravitational potential energy when the walking beam 8 descends, and effectively improving the efficiency of turbine power generation.

[0023] Combined with Figure 5As shown, when the pumping unit is in oil production operation, during the upstroke, the pumping rod 8 is connected to the oil outlet valve 32 through the well rod 26 to drive it to move upward, the volume of the middle area between the oil inlet valve 34 and the oil outlet valve 32 increases, the pressure decreases, and the crude oil pushes the second valve ball 35 open. At the same time, the first valve ball 33 is closed under the action of the pressure difference. During this process, the second turbine 30 rotates under the action of the crude oil flow and drives the turbine built-in annular magnet 36 to rotate synchronously. At this time, the second coil 29 installed on the well pipe 27 generates a motional electromotive force to store energy; during the downstroke, the middle area between the oil inlet valve 34 and the oil outlet valve 32 is squeezed, the first valve ball 33 is pushed open by the crude oil, the second valve ball 35 is in a closed state, and the crude oil flows out of the oil outlet valve 32 to complete a cycle. During this process, the first turbine 31 rotates under the action of the crude oil flow and drives the turbine built-in annular magnet 36 to rotate synchronously. At this time, the first coil 28 installed on the well pipe 27 generates a motional electromotive force to store energy. After multiple cycles, the gravitational potential energy brought by the descent of the donkey head 7 can be fully utilized to generate electricity.

[0024] Compared with traditional beam pumps, the energy-saving beam pump with gravity compensation mechanism and turbine power generation provided by the present invention can realize the circulation and storage of part of the energy, thereby reducing the overall energy consumption of the system. It has the characteristics of low energy consumption and strong practicality, which not only conforms to the characteristics of energy conservation and emission reduction advocated by the contemporary era, but also guarantees my country's energy security to a certain extent.

Claims

1. A beam pumping unit with a gravity compensation mechanism and a turbine generator, comprising: a beam pumping unit base (1), a solar power generation device (2), a connecting rod (3), a cross beam (4), a beam (5), a gravity compensation mechanism (6), a donkey head (7), a pumping rod (8), an oil pumping well (9), a bracket (10), a power conversion device (11), a motor (12), a motor fixing frame (13), a screw rod (14), a counterweight (15), a middle shaft (16), a slide rail (17), a reduction box (18), an output wheel (19), a reduction box output end shaft (20), A crank pin (21), a crank (22), a belt (23), a pulley (24), a pulley shaft (25), a well rod (26), a well pipe (27), a first coil (28), a second coil (29), a second turbine (30), a first turbine (31), an oil outlet valve (32), a first valve ball (33), an oil inlet valve (34), a second valve ball (35), a turbine built-in annular magnet (36), a photovoltaic power generation panel (37), a longitudinal rotation shaft (38), a support plate (39), a horizontal rotation shaft (40), and a solar power generation device base (41); characterized in that: The donkey head (7) is connected to one side of the walking beam (5), the cross beam (4) is connected to the other side of the walking beam (5), a central shaft (16) is installed in the middle of the walking beam (5) at a position biased towards the donkey head (7), and a gravity compensation mechanism (6) is installed on the upper part of the walking beam (5), wherein the motor (12) is fixed by a motor fixing frame (13) to drive the screw rod (14) to rotate, the counterweight block (15) fits on the slide rail (17) and moves with the rotation of the screw rod (14), one end of the pumping rod (8) is connected to the donkey head (7), and the other end is connected to the pumping well (9), the top end of the bracket (10) is fixed on the central shaft (16), and the bottom end is mounted on the walking beam pumping unit base (1), thereby supporting the walking beam (5).

2. A beam type energy-saving pumping unit with a gravity compensation mechanism and turbine generator according to claim 1, characterized in that: The power conversion device (11) is connected to the crossbeam (4) by a connecting rod (3). In the power conversion device (11), a crank (22) is connected to the other end of the connecting rod (3) through a crank pin (21). The output end shaft (20) of the reduction box fixes the output wheel (19) and the crank (22) together. The belt (23) links the output wheel (19) and the pulley (24). The pulley (24) and the pulley shaft (25) are concentric, and they are all fixed on the reduction box (18).

3. A beam-type energy-saving pumping unit with a gravity compensation mechanism and turbine generator according to claim 1, characterized in that: The well pipe (27) is inside the pumping well (9), one end of the well pipe (27) is a well rod (26), a first coil (28), a second coil (29), an oil outlet valve (32) and an oil inlet valve (34) are embedded inside the well pipe (27), the first turbine (31) and the second turbine (30) are respectively surrounded by the first coil (28) and the second coil (29), the first valve ball (33) and the second valve ball (35) are respectively embedded inside the oil outlet valve (32) and the oil inlet valve (34), and a turbine built-in annular magnet (36) is provided between the second coil (29) and the second turbine (30) and between the first coil (28) and the first turbine (31).

4. A beam type energy-saving oil pumping unit with a gravity compensation mechanism and turbine generator according to claim 1, characterized in that: The solar power generation device base (41) in the solar power generation device (2) is fixed on the beam pumping unit base (1), the horizontal rotation shaft (40) is embedded in the center of the solar power generation device base (41), the longitudinal rotation shaft (38) and the horizontal rotation shaft (40) are respectively connected to the two ends of the support plate (39), and the photovoltaic power generation panel (37) is connected to the support plate (39) via the longitudinal rotation shaft (38).

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