CN112360398B - Beam-pumping unit servo drive system applying intermittent swing amplitude screen control technology - Google Patents
Beam-pumping unit servo drive system applying intermittent swing amplitude screen control technology Download PDFInfo
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- 238000005086 pumping Methods 0.000 title claims abstract description 44
- 238000005516 engineering process Methods 0.000 title claims abstract description 10
- 241001023788 Cyttus traversi Species 0.000 claims description 58
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 230000003068 static effect Effects 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000003129 oil well Substances 0.000 abstract description 8
- 230000033001 locomotion Effects 0.000 description 8
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000000605 extraction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009347 mechanical transmission Effects 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 241000283074 Equus asinus Species 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
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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
- 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
- E21B43/127—Adaptations of walking-beam pump systems
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Abstract
The invention belongs to the field of oil field pumping unit equipment, and particularly relates to a beam pumping unit servo driving system applying an intermittent swing amplitude screen control technology. The invention uses the touch screen to match with the use, designs the variable stroke driving mechanism with unique structure, realizes the ground non-stop underground intermittent waiting and the whole cycle pumping parameter operation mode, uses the touch screen to control the positive and negative rotation speed and the operation time of the motor, enables the crank of the pumping unit to swing in a smaller angle range when the pumping unit stops the well, the swing time is determined according to the yield of the oil well, the structure of the pumping unit, the effective stroke and the pump diameter of the special oil well pump, enters the normal oil extraction program after the swing time reaches the set value, continues the swing in the next period, and the reciprocating circulation is carried out, thus effectively improving the pump efficiency.
Description
Technical Field
The invention belongs to the field of oil field pumping unit equipment, and particularly relates to a servo driving system of a beam pumping unit, which applies an intermittent swing amplitude screen control technology.
Background
With the continuous production of petroleum, part of oil wells enter the middle and later periods of production, the formation pressure is continuously reduced, and the liquid supply capacity is weaker and weaker. The liquid yield of the oil pumping unit model selection and the rod pump design is far greater than the liquid supply capacity of an oil well, so that the phenomenon of insufficient liquid supply of a large number of oil wells is caused. From the perspective of improving the pump efficiency and saving energy, the intermittent pumping working mode is an extremely effective mode, and the problem that the continuous operation of the oil pumping equipment cannot be met due to insufficient liquid supply is solved. Meanwhile, the service life of the equipment and the pump detection period of the oil well can be effectively prolonged.
In the prior art, most wells adopting the intermittent oil extraction technology have a uniform and fixed intermittent extraction system, but the labor intensity of workers is increased, intermittent extraction time cannot be accurately controlled, the management difficulty is high, and the working system is difficult to execute in place.
Disclosure of Invention
The invention provides a beam-pumping unit servo drive system applying an intermittent swing amplitude screen control technology, which utilizes screen control to adjust the rotating speed and the operating time of a motor, converts long-period intermittent pumping oil into a plurality of short-period distributed intermittent pumping oil, converts a conventional intermittent pumping part into crank small-angle swing, and realizes a control strategy that an underground plunger keeps motionless during the crank small-angle swing, thereby realizing the swinging underground intermittent waiting and the whole-cycle pumping operation of ground equipment.
The technical problem solved by the invention is realized by adopting the following technical scheme: a servo drive system of a beam-pumping unit applying an intermittent swing amplitude screen control technology comprises a base, a walking beam, a support, a main horse head, an auxiliary horse head, a counterweight horse head, a slide seat, a slide plate and a variable stroke drive mechanism, wherein the base is fixedly arranged on the ground, the lower end of the support is fixedly arranged in the middle of the base, the upper end of the support is hinged in the middle of the walking beam, the main horse head and the counterweight horse head are respectively and fixedly arranged at two ends of the walking beam, the auxiliary horse head is fixedly arranged on the walking beam and positioned at one side of the main horse head, the slide seat is fixedly arranged on the base, the slide plate is slidably arranged on the slide seat, guide wheels are respectively arranged right below the auxiliary horse head and the counterweight horse head, the auxiliary horse head and the counterweight horse head are respectively connected with a soft rope, the soft rope connected on the auxiliary horse head bypasses the guide wheels below the auxiliary horse head and then is connected at one end of the, the flexible rope connected to the counterweight horse head is connected to the other end of the sliding plate after bypassing the guide wheel below the counterweight horse head, and the sliding plate reciprocates along the sliding seat under the driving of the variable stroke driving mechanism so as to drive the walking beam to reciprocate by taking the upper end of the bracket as a shaft;
the stroke-variable driving mechanism comprises a power motor and a flywheel, wherein the power motor is fixedly arranged on the bracket, the flywheel is fixedly arranged on an output shaft of the power motor, at least two annular track grooves are processed on the outer side of the flywheel, a conversion seat is fixedly arranged on the upper side of the sliding plate, long holes A with the number equal to that of the annular track grooves are processed on the conversion seat, and a bolt assembly is respectively installed on each long hole A in a sliding manner;
the bolt assembly comprises a sliding block, an electromagnetic coil, a static iron core, a spring and a movable iron core, wherein the sliding block is slidably mounted in an opening of the long hole A and can freely slide along the length direction of the long hole A;
each annular track groove is annular, a groove depth interface is arranged in each annular track groove, the groove depth interfaces are parallel to the axis of the movable iron core, the groove depth interfaces are taken as starting points, the depth of each annular track groove is gradually reduced along the anticlockwise direction until the annular track groove reaches a groove depth boundary line again, and therefore a depth cliff is formed at each groove depth interface;
and a balancing weight is connected in series on the soft rope between the counterweight horse head and the guide wheel below the counterweight horse head.
As a further technical solution, the length direction of the elongated hole a is along the vertical direction.
As an alternative to the variable stroke driving mechanism, the variable stroke driving mechanism may adopt a structure as follows:
the stroke-variable driving mechanism comprises a power motor, a power motor base, a flywheel and a crank, wherein the power motor base is slidably arranged on the bracket, a lifting motor is fixed on the side surface of the bracket, a lead screw is connected on an output shaft of the lifting motor, the lead screw is connected with the power motor base through a thread pair, the flywheel is fixedly arranged on an output shaft of the power motor, the crank is structurally divided into a linear section and a sector section, the linear section is superposed with a symmetrical shaft of the sector section, a rotating shaft is arranged at the center of the sector section, the crank is arranged on the bracket through the rotating shaft, the side surface of the flywheel is provided with a short pin, the linear section is provided with a long hole B corresponding to the short pin, the tail end of the short pin is inserted into the opening of the long hole B and can smoothly slide along the long hole B, and the arc surface of the sector section is matched with the upper surface of the sliding plate through a gear pair.
As a further technical scheme, a radial sliding groove is formed in the flywheel, and the short pin is installed in the radial sliding groove in a sliding mode and can slide along the radial direction of the flywheel under the driving of a lead screw.
The invention has the beneficial effects that: the invention can be used in cooperation with a touch screen, realizes the running modes of ground non-stop underground intermittent waiting and whole-cycle swabbing parameters by designing a variable stroke driving mechanism with a unique structure, controls the rotating speed and the running time of a motor by using the touch screen, ensures that a crank of the pumping unit swings in a smaller angle range when the pumping unit stops the well, ensures the swinging time according to the yield of an oil well, the structure of the pumping unit, the effective stroke and the pump diameter of a special oil well pump, enters a normal oil extraction program until the next period continues swinging after the swinging time reaches a set value, and thus the reciprocating circulation effectively improves the pump efficiency and further improves the adaptability of the pumping unit to different working conditions.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the latch assembly;
FIG. 3 is a schematic structural view of the flywheel of FIG. 1;
FIG. 4 is a schematic structural diagram of another embodiment of the present invention;
fig. 5 is a schematic structural view of another embodiment of the flywheel of fig. 4.
In the figure: 1. a main horse head; 2. a vice donkey head; 3. a walking beam; 4. a support; 5. weighting the horsehead; 6. a flexible cord; 7. a balancing weight; 8. a guide wheel; 9. a base; 10. a slide base; 11. an annular track groove; 12. a conversion seat; 13. a plug pin assembly; 14. a strip hole A; 15. a flywheel; 16. a slider; 17. a stationary iron core; 18. a movable iron core; 19. a sector-shaped section; 20. a straight line section; 21. a short pin; 22. a rotating shaft; 23. a lifting motor; 24. a power motor base; 25. a lead screw; 26. a strip hole B; 27. a sliding plate 28, a radial sliding groove 29 and a spring; 30. an electromagnetic coil; 31. the groove depth interfaces.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the first embodiment is as follows:
as shown in fig. 1, the present embodiment includes a base 9, a walking beam 3, a support 4, a main horse head 1, an auxiliary horse head 2, a counterweight horse head 5, a sliding base 10, a sliding plate 27 and a variable stroke driving mechanism, wherein the base 9 is fixedly installed on the ground, the lower end of the support 4 is fixedly installed in the middle of the base 9, the upper end of the support 4 is hinged in the middle of the walking beam 3, the main horse head 1 and the counterweight horse head 5 are respectively fixedly installed at two ends of the walking beam 3, the auxiliary horse head 2 is fixedly installed on the walking beam 3 and is located at one side of the main horse head 1, the sliding base 10 is fixedly installed on the base 9, the sliding plate 27 is slidably installed on the sliding base 10, guide wheels 8 are respectively arranged under the auxiliary horse head 2 and the counterweight horse head 5, the auxiliary horse head 2 and the counterweight horse head 5 are respectively connected with a soft guide wheel 6, the soft rope 6 connected to the auxiliary horse head 2 is connected to one end of the sliding plate 27 after bypassing 8 under the auxiliary, the soft rope 6 connected to the counterweight horse head 5 bypasses a guide wheel 8 below the counterweight horse head 5 and then is connected to the other end of the sliding plate 27, the sliding plate 27 reciprocates along the sliding seat 10 under the driving of the variable stroke driving mechanism, and then the sliding beam 3 is driven to swing in a reciprocating mode by taking the upper end of the support 4 as a shaft, so that oil pumping action is achieved. Compared with a crank connecting rod transmission mechanism on a traditional walking beam 3 type oil pumping machine, the power transmission mechanism based on the flywheel 15, the sliding plate 27, the sliding seat 10 and the soft rope 6 is arranged, the mechanical transmission efficiency is higher, the energy-saving effect is better, and the economic benefit is good. It should be noted that, here, it must be ensured that the soft rope 6 between the assistant horse head 2 and the guide wheel 8 directly below the assistant horse head 2 is always in the vertical direction, and at the same time, it must be ensured that the soft rope 6 between the counterweight horse head 5 and the guide wheel 8 directly below the counterweight horse head 5 is always in the vertical direction.
The invention also provides a variable stroke driving mechanism with a unique structure, realizes the adjustment of the stroke of the pumping unit by the design of the variable stroke driving mechanism, is combined with the variable frequency speed regulation technology of a power motor in the prior art, can adjust the pumping speed of the pumping unit from two aspects of stroke and stroke frequency, has larger adjustment range of the pumping speed and stronger applicability to different well conditions.
As shown in fig. 1 and fig. 2, in the present embodiment, the variable stroke driving mechanism includes a power motor (not shown in the figure) and a flywheel 15, the power motor is fixedly installed on the bracket 4, and specifically, a direct-drive low-speed torque motor of type 800E manufactured by guilin star technologies, inc, may be adopted, the flywheel 15 is fixedly installed on an output shaft of the power motor, three annular track grooves 11 are processed on an outer side of the flywheel 15, a conversion base 12 is fixedly installed on an upper side of the sliding plate 27, a number of elongated holes a14 equal to the number of the annular track grooves 11 are processed on the conversion base 12, and a bolt assembly 13 is respectively slidably installed on each elongated hole a 14. The bolt component 13 comprises a sliding block 16, an electromagnetic coil 30, a static iron core 17 and a movable iron core 18, wherein the sliding block 16 is slidably mounted in an opening of the long hole A14 and can freely slide along the length direction of the long hole A14, the static iron core 17 and the movable iron core 18 are both arranged in the center of the electromagnetic coil 30, one end of the static iron core 17 is fixedly connected with the sliding block 16, the other end of the static iron core is opposite to one end of the movable iron core 18, a spring 29 is clamped between the static iron core 17 and the movable iron core 18, when the bolt is powered on, the movable iron core 18 is attracted by electromagnetic force and cannot be inserted into the annular track groove 11, and after the bolt is powered off, the movable iron core 18 extends out under the action of the elastic force of the spring 29 and is inserted into the annular track.
When the electromagnetic coil 30 is in a power-off state, the other end of the movable iron core 18 is inserted into the annular track groove 11 and always abuts against the bottom of the annular track groove 11 under the action of the elastic force of the spring 29;
each annular track groove 11 is circular, a groove depth interface 31 is arranged in each annular track groove 11, the groove depth interface 31 is parallel to the axis of the movable iron core 18, the groove depth interface 31 serves as a starting point, the depth of each annular track groove 11 is gradually reduced along the anticlockwise direction until the annular track groove 11 reaches the groove depth interface 31 again, and therefore a depth cliff is formed at the groove depth interface 31.
That is, the latch pin assembly 13 can slide along the elongated hole a14 and can slide along the circumference of the circular track groove 11, before the power motor is started, the plunger 18 is located at the position where the groove depth in the circular track groove 11 is the smallest, after the power motor is started, the flywheel 15 rotates counterclockwise, the latch pin assembly 13 starts to slide relatively along the circumference of the circular track groove 11 (at this time, the latch pin assembly 13 is actually stationary, and the flywheel 15 is moving), meanwhile, as the groove depth increases, the plunger 18 on the latch pin assembly 13 gradually extends into the deeper part of the circular track groove 11 under the action of the spring 29, when the latch pin assembly 13 meets the groove depth interface 37, the groove depth interface 31 pushes the latch pin assembly 13, and the latch pin assembly 13 rotates with the flywheel 15 (at this time, the latch pin assembly 13 and the flywheel 15 are relatively stationary), and thereafter, the latch pin assembly 13 moves under the driving of the flywheel 15, the horizontal component motion of the bolt component 13 is converted into the transverse reciprocating motion of the sliding plate 27, and the transverse reciprocating motion of the sliding plate 27 is converted into the reciprocating swing of the walking beam 3 through the traction action of the soft rope 6, so that the oil pumping action of the oil pumping unit is realized.
In the above structure, the arrangement of the groove depth interface 31 makes the load of the power motor at the starting moment only be the flywheel 15, and the starting load is very small. At the initial stage of rotation of the flywheel 15, the sliding plate 27 is in unpowered connection with the flywheel 15, mechanical energy output by the power motor is only converted into inertia potential energy of the flywheel 15, and after the flywheel 15 starts to drive the bolt assembly 13 to move, the inertia potential energy of the flywheel 15 and the mechanical energy continuously output by the power motor jointly push the bolt assembly 13, the sliding plate 27 and the walking beam 3 to move, so that the starting torque of the power motor is smaller, and the requirement on the torque of the power motor is reduced.
In an operating state, after the electromagnetic coil 30 in one of the latch assemblies 13 is de-energized, the movable iron core 18 in the latch assembly 13 extends out and is inserted into the corresponding annular track groove 11, so that the conversion base 12 and the flywheel 15 are in mechanical transmission connection, and a continuous transmission chain is formed on the pumping unit. When the stroke needs to be adjusted, the power motor is turned off temporarily, the pumping unit is braked, then the power supply of one plug pin assembly 13 which is in the current power-off state is switched on, the other plug pin assembly 13 is powered off, and the other annular track groove 11 with different outline dimensions participates in transmission, so that the stroke switching is realized. In the present invention, the stroke of the pumping unit is determined by the reciprocating amplitude of the sliding plate 27, and the movement amplitude of the sliding plate 27 is determined by the contour dimension of the circular track groove 11, so that the stroke can be adjusted by engaging different bolt assemblies 13 in transmission.
In addition, the bolt component 13 in the invention can also be used for preventing the pumping unit from sliding after braking. During braking, the pumping unit is braked by using a conventional braking mechanism on the pumping unit, after braking, the movable iron cores 18 in the three bolt assemblies 13 are powered off simultaneously and then are inserted into the corresponding annular track grooves 11, and at the moment, the flywheel 15 and the conversion seat 12 cannot rotate relatively, so that the pumping unit is effectively prevented from slipping.
It should be noted that, after the pumping unit is stopped, in order to make each plug pin assembly 13 exactly align with each corresponding annular track groove 11, the following conditions are preferably satisfied in the structure of the present invention: when each plug pin assembly 13 is located at the lowest end of the respective elongated hole a14 and the pumping unit walking beam 3 is located at the bottom dead center (i.e., the main horse head 1 is located at the lower limit position), each plug pin assembly 13 is exactly aligned with the respective corresponding annular track groove 11, and at this time, the movable iron core 18 in the plug pin assembly 13 can freely enter and exit the annular track groove 11. As shown in fig. 1, the walking beam 3 is in the bottom dead center position, and the pin assemblies 13 are exactly aligned with the corresponding circular track grooves 11.
The weight balancing block 7 is connected in series on the soft rope 6 between the weight balancing horse head 5 and the guide wheel 8 below the weight balancing horse head 5, and as a preferred scheme, the weight of the weight balancing block 7 should satisfy the following conditions: when no power connection is established between the flywheel 15 and the conversion seat 12 (namely, all the bolt assemblies 13 are electrified), the walking beam 3 of the pumping unit can stably stop at the bottom dead center under the load action of the two ends of the walking beam (namely, the main horse head 1 is positioned at the lower limit position), so that the pumping unit can automatically stop at the bottom dead center after being stopped.
As shown in fig. 1, the longitudinal direction of the elongated hole a14 is vertical, but may be inclined.
Example two:
the present embodiment is different from the first embodiment in the variable stroke driving mechanism, and the variable stroke driving mechanism adopted in the present embodiment has the advantages that the on-line adjustment of the stroke can be realized (i.e. the stop is not required when the stroke is adjusted), so the operation is more convenient and faster, and meanwhile, when the stroke is adjusted, the stroke is continuously changed instead of discretely changed, so the adjustment precision is higher. Specifically, the method comprises the following steps:
as shown in fig. 4, in the present embodiment, the variable stroke driving mechanism includes a power motor, a power motor base 24, a flywheel 15 and a crank, the power motor base 24 is slidably mounted on the bracket 4, a lifting motor 23 is fixed to a side surface of the bracket 4, an output shaft of the lifting motor 23 is connected to a lead screw 25, the lead screw 25 is connected to the power motor base 24 through a screw pair, the flywheel 15 is fixedly mounted on the output shaft of the power motor, the crank is structurally divided into a linear section 20 and a sector section 19, the linear section 20 is overlapped with a symmetric axis of the sector section 19, a rotating shaft 22 is mounted at a center of the sector section 19, the crank is mounted on the bracket 4 through the rotating shaft 22, a short pin 21 is mounted on a side surface of the flywheel 15, a long hole B26 is provided on the linear section 20 corresponding to the short pin 21, a distal end of the short pin 21 is inserted into an opening of a long hole B26 and can slide smoothly along the long hole B26, the arc-shaped surface of the sector 19 cooperates with the upper surface of the slide plate 27 by means of a gear pair.
In operation, the flywheel 15 is driven by a power motor (not shown in the figure) to rotate, the short pin 21 on the flywheel 15 drives the crank to swing around the rotating shaft 22, and the sector section 19 on the crank converts the rotating motion into the transverse reciprocating motion of the sliding plate 27 through the gear pair, and further converts the transverse reciprocating motion into the reciprocating motion of the walking beam 3. In specific implementation, the lifting motor 23 may be a stepping motor.
As a further technical solution, a radial sliding slot 28 is provided on the flywheel 15, and the short pin 21 is slidably mounted in the radial sliding slot 28 and can slide along the radial direction of the flywheel 15 under the driving of a lead screw 25. By this mechanism, the distance between the short pin 21 and the center point of the flywheel 15 is made adjustable, thereby further improving the range and flexibility of stroke adjustment. In practice, the screw 25 may be driven by a motor or manually.
Claims (2)
1. A walking beam (3) oil pumping unit servo drive system applying intermittent swing amplitude screen control technology is characterized in that: comprises a base (9), a walking beam (3), a bracket (4), a main horse head (1), an auxiliary horse head (2), a counterweight horse head (5), a sliding seat (10), a sliding plate (27) and a variable stroke driving mechanism, wherein the base (9) is fixedly arranged on the ground, the lower end of the bracket (4) is fixedly arranged at the middle part of the base (9), the upper end of the bracket (4) is hinged at the middle part of the walking beam (3), the main horse head (1) and the counterweight horse head (5) are respectively and fixedly arranged at the two ends of the walking beam (3), the auxiliary horse head (2) is fixedly arranged on the walking beam (3), the position is positioned at one side of the main horse head (1), the sliding seat (10) is fixedly arranged on the base (9), the sliding plate (27) is slidably arranged on the sliding seat (10), the auxiliary horse head (2) and the counterweight horse head (5) are respectively provided with a guide wheel (8), and the auxiliary horse head (2) and the counterweight horse head (5) are respectively connected with a soft rope (6), the flexible rope (6) connected to the auxiliary horse head (2) bypasses a guide wheel (8) below the auxiliary horse head (2) and then is connected to one end of the sliding plate (27), the flexible rope (6) connected to the counterweight horse head (5) bypasses the guide wheel (8) below the counterweight horse head (5) and then is connected to the other end of the sliding plate (27), and the sliding plate (27) reciprocates along the sliding seat (10) under the driving of the sliding seat (10) stroke-variable driving mechanism, so that the walking beam (3) is driven to reciprocate by taking the upper end of the support (4) as an axis;
the stroke-variable driving mechanism comprises a power motor and a flywheel (15), wherein the power motor is fixedly arranged on the support (4), the flywheel (15) is fixedly arranged on an output shaft of the power motor, at least two annular track grooves (11) are formed in the outer side of the flywheel (15), a conversion seat (12) is fixedly arranged on the upper side of the sliding plate (27), strip holes A (14) with the number equal to that of the annular track grooves (11) are formed in the conversion seat (12), and a bolt assembly (13) is slidably arranged on each strip hole A (14);
the bolt assembly (13) comprises a sliding block (16), an electromagnetic coil (30), a static iron core (17), a movable iron core (18) and a spring (29), wherein the sliding block (16) is slidably mounted in an opening of the long hole A (14) and can freely slide along the length direction of the long hole A (14), the static iron core (17) and the movable iron core (18) are both arranged in the center of the electromagnetic coil, one end of the static iron core (17) is fixedly connected with the sliding block (16), the other end of the static iron core (17) is opposite to one end of the movable iron core (18), the spring (29) is clamped between the static iron core (17) and the movable iron core (18), and the other end of the movable iron core (18) is inserted into the annular track groove (11) and is always abutted to the bottom of the annular track groove (11) under the elastic force action of the spring (29) when the electromagnetic;
each annular track groove (11) is annular, a groove depth interface (31) is arranged in each annular track groove (11), the groove depth interface (31) is parallel to the axis of the movable iron core (18), the groove depth interface (31) is taken as a starting point, the depth of each annular track groove (11) is gradually reduced along the anticlockwise direction until the annular track groove reaches the groove depth interface (31) again, and a depth cliff is formed at the groove depth interface (31);
and a balancing weight (7) is connected in series on the soft rope (6) between the counterweight horse head (5) and the guide wheel (8) below the counterweight horse head (5).
2. The servo drive system of a walking beam (3) pumping unit applying the intermittent swing screen control technology according to claim 1, characterized in that: the length direction of the long hole A (14) is along the vertical direction.
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| CN202011334750.4A CN112360398B (en) | 2020-11-25 | 2020-11-25 | Beam-pumping unit servo drive system applying intermittent swing amplitude screen control technology |
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| CN202011334750.4A CN112360398B (en) | 2020-11-25 | 2020-11-25 | Beam-pumping unit servo drive system applying intermittent swing amplitude screen control technology |
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| CN113898325A (en) * | 2021-10-22 | 2022-01-07 | 于婷婷 | Pumping unit capable of realizing intermittent pumping through non-whole-cycle motion of crank without stopping |
| CN114575794B (en) * | 2022-04-28 | 2022-08-05 | 东营孚瑞特石油机械设备有限公司 | Energy-saving beam-pumping unit using inertial force |
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| CN87211625U (en) * | 1987-08-04 | 1988-08-10 | 新疆第三机床厂 | Side-rotation hinge device for "donkey head" of oil-pumping unit |
| US5655604A (en) * | 1994-05-04 | 1997-08-12 | Newton Technologies, Inc. | Down-hole, production pump and circulation system |
| CN2382856Y (en) * | 1999-08-06 | 2000-06-14 | 陈东旺 | Energy saving oil pumping unit |
| CN109667563B (en) * | 2019-01-31 | 2024-07-16 | 大庆慧龙石油机械有限公司 | Energy-saving oil pumping unit |
| CN111155971B (en) * | 2020-03-05 | 2020-10-30 | 正弦科技有限公司 | Beam-pumping unit driven by winch |
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