Energy-saving pumping unit balancing work of up and down strokes by spring energy storage

Abstract

The application discloses a kind of energy-saving pumping unit for balancing up and down secondary work by spring energy storage, which can make pumping unit speed uniform in up and down stroke, motor work uniform, and realize energy consumption reduction in oil production process.The pumping unit comprises equipment foundation, power part A, volute spring assembly B and winding roller, the left and right ends of the output shaft of the power part A are respectively connected with the volute spring assembly B and the winding roller, flexible sucker rod is spirally wound on the winding roller, head pulley gantry support and turnover frame assembly C are installed from front to back in front of the equipment foundation, head pulley assembly D is installed on the turnover frame assembly C, the turnover frame assembly C is fixedly connected with the head pulley gantry support during production, and the leading end of the flexible sucker rod is opposite to the wellhead after winding around the head pulley assembly D, the volute spring assembly B is in energy storage state and release state when the sucker rod is downhole and uphole, the turnover frame assembly C is separated from the head pulley gantry support during operation, and is turned over and fixed backward.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pumping unit, in particular to a spring energy storage technology for balancing the up and down stroke work of energy-saving pumping unit. BACKGROUND

[0002] In the process of oil production, in order to solve the problem of imbalance of up and down stroke work of pumping unit, the most commonly used method is to use a balance block mechanism.

[0003] The motor power of the pumping unit is selected according to the maximum lifting load. When the pumping unit is ascending, the load is maximum, the current of the motor is maximum, and the output of the motor is maximum. When the pumping unit is descending, the working condition is opposite. In order to make the motor work the same in up and down stroke, the load needs to be increased by using the balance block when the pumping unit is descending, which causes energy waste. With the deepening of well depth, deep well pumping unit and long stroke pumping unit are more and more widely used, and the energy waste is more serious. SUMMARY

[0004] The purpose of the present application is to provide a spring energy storage technology for balancing the up and down stroke work of energy-saving pumping unit. When the pumping unit is descending, the descending damping is increased to keep the descending speed uniform, and the spring starts to store energy. When the pumping unit is ascending, the load is increased, the spring releases energy, and the motor assists the load lifting, so that the speed of the pumping unit is uniform in up and down stroke, and the motor work is uniform, thereby reducing the initial motor power and reducing the energy consumption in the process of oil production.

[0005] The technical solution of the present application is: a spring energy storage technology for balancing the up and down stroke work of energy-saving pumping unit, including a device foundation, a power part A is arranged at the rear of the device foundation, a spiral spring assembly B and a winding roller are arranged on the left and right sides of the device foundation above the power part A, the output shaft of the power part A has left and right end heads and is connected with the corresponding spiral spring assembly B and winding roller, a flexible sucker rod is spirally wound on the winding roller, a sheave gantry support and a turnover frame assembly C are installed from front to back at the front of the device foundation, a sheave assembly D is installed on the turnover frame assembly C, the turnover frame assembly C is fixedly connected with the sheave gantry support during production, and the leading end of the flexible sucker rod is opposite to the wellhead after passing through the sheave assembly D, the spiral spring assembly B is in energy storage state when the sucker rod is descending along the wellhead, and the spiral spring assembly B is in release state when the sucker rod is ascending along the wellhead; the turnover frame assembly C is separated from the sheave gantry support during operation, and is turned over and fixed backward.

[0006] Further, the volute spring assembly B comprises a volute spring shell, a volute spring and a volute spring roller core, the volute spring shell is installed on the equipment base, the inner ring of the volute spring is sleeved on the volute spring roller core and the inner end of the volute spring is fixedly connected with the spring roller core, and the outer end of the volute spring is fixed on the inner wall of the volute spring shell.

[0007] Further, a pressure lever is arranged between the crown gantry and the turnover assembly C on the equipment base, and the pressure lever is fixed on the equipment base by bolts passing through screw holes on the equipment base and the cement platform under the equipment base.

[0008] Further, the turnover assembly C comprises a turnover shaft bracket fixedly installed on the equipment base behind the crown gantry, a turnover shaft installed in the turnover shaft bracket, a crown turnover frame hingedly connected with the turnover shaft at the lower end, a ground anchor fixedly installed on the equipment base behind the turnover shaft bracket, and a steel wire cable connected between the crown assembly D and the ground anchor, and a vertical support is arranged on the upper part of the crown turnover frame, and a method Lan connected with each other is arranged between the bottom surface of the vertical support and the top surface of the crown gantry, and the crown turnover frame is turned over backward and supported on the equipment base during operation and fixedly pulled by the steel wire cable.

[0009] Further, the crown assembly D comprises a support seat, a bearing seat, a crown shaft and a crown, the support seat is fixedly installed on the top surface of the crown turnover frame, the bearing seat is fixedly installed on the support seat, the crown is installed on the crown shaft, and the two ends of the crown shaft are installed on the bearing seat.

[0010] Further, an adjusting nut is welded on the left end surface of the bearing seat on the left side and on the right end surface of the bearing seat on the right side, respectively, two adjusting bolts are installed on the two adjusting nuts, respectively, one end of the adjusting bolt is abutted against the side end surface of the crown shaft in the bearing seat, and a lock nut is further installed on the adjusting bolt, and the adjusting nut, the adjusting bolt and the lock nut constitute a translation fine adjustment mechanism, and the left and right positions of the crown can be finely adjusted by the adjusting bolts on the left and right sides.

[0011] Further, the power part A comprises a motor, a speed reducer and a brake, the motor is fixedly arranged on the speed reducer base for providing power to the speed reducer, the input shaft and the output shaft of the speed reducer are respectively left and right end heads, and the left and right end heads of the input shaft of the speed reducer are respectively connected with the brake and the motor.

[0012] Further, the speed reducer base and the suspension beam are fixedly arranged on the equipment base, the brake base is fixedly arranged on the suspension beam, the speed reducer is arranged on the speed reducer base, the brake is fixedly arranged on the brake base, and the motor is fixedly arranged on the speed reducer base.

[0013] Further, the motor is a permanent magnet synchronous direct drive motor, and the brake is an electromagnetic brake. The permanent magnet synchronous direct drive motor is selected as the power source, is used for winding the flexible light pole, the motor is uniformly processed, so that the initial selection motor power is reduced, and energy consumption is reduced in the oil extraction process.

[0014] Further, the equipment base has a length of less than or equal to 5 m and a width of less than or equal to 2.6 m. The equipment base size is suitable for long-distance transportation and on-site installation, can be directly used with an oil well cement platform, does not need to be constructed additionally, reduces operation cost and labor cost, and shortens installation time.

[0015] The beneficial effects of the energy-saving pumping unit are as follows: the power part, the crown wheel assembly and the turnover frame assembly are installed on the same equipment base, a double-input and double-output speed reducer is selected, the structure is compact and firm, the occupied area is small, installation and disassembly are facilitated, and operation is convenient. When the pumping unit is in downstroke, the vortex spring is used as an energy storage element to increase downstroke damping, keep the downstroke speed uniform at all times, and start energy storage of the spring; when the pumping unit is in upstroke, the spring releases energy to assist the motor to lift the load, so that the pumping unit has uniform speed in upstroke and downstroke. The turnover frame assembly can realize switching between production and operation, improve production and operation efficiency, and is convenient and safe to operate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the energy-saving pumping unit in operation;

[0017] Figure 2 is an enlarged view of F of Figure 1 ;

[0018] Figure 3 is a structural schematic view of the energy-saving pumping unit in operation;

[0019] Figure 4 is a top view of the energy-saving pumping unit at the end of downstroke (vortex spring is wound up);

[0020] Figure 5 is an enlarged view of E of Figure 4 ;

[0021] Figure 6 is a schematic view of the energy-saving pumping unit at the end of downstroke (vortex spring is wound up);

[0022] Figure 7 is a K view of Figure 1 (at the end of downstroke of the pumping unit);

[0023] Figure 8 is a K view of Figure 1 (at the end of upstroke of the pumping unit);

[0024] Figure 9is the energy-saving pumping unit downlink end scroll spring winding state diagram of the present application;

[0025] Figure 10 is the device infrastructure diagram;

[0026] Figure 11 is Figure 9 top view;

[0027] Figure 12 is Figure 9 left view;

[0028] Figure 13 is the left view of the crown wheel assembly and the turnover frame assembly;

[0029] Figure 14 is the square flange structure diagram.

[0030] In the figure: 1. scroll spring shell, 2. scroll spring, 3. scroll spring roller core, 4. electromagnetic brake, 5. speed reducer, 6. permanent magnet synchronous direct drive motor, 7. winding roller, 8. device foundation, 9. speed reducer base, 10. electromagnetic brake base, 11. suspension beam, 12. flexible sucker rod, 13. crown wheel, 14. wellhead, 15. crown wheel gantry support, 16. crown wheel turnover frame, 17 ground anchor, 18. pressure lever, 19. turnover shaft, 20. turnover shaft axle, 21. crown wheel shaft, 22. support seat, 23. steel wire rope, 24. square flange, 25. bearing seat, 26. adjusting nut, 27. adjusting bolt, 28. lock nut, 29. oil well cement platform. DETAILED DESCRIPTION

[0031] The present application relates to a kind of spring energy storage and utilization balanced up and down stroke work's energy-saving pumping unit, such as Figure 1 、 Figure 3 、 Figure 4 And Figure 5As shown, including the device base 8, the power part A is arranged at the rear of the device base 8, and the volute spring assembly B and the winding roller 7 are arranged on the device base 8 at the left and right sides of the power part A respectively, the output shaft of the power part A has left and right end heads, and the right end head of the output shaft is connected with the winding roller 7 through a key bar, and the left end head of the output shaft of the power part A is connected with the volute spring assembly B, the flexible sucker rod 12 is spirally wound on the winding roller 7, the head pulley gantry support 15 and the turnover frame assembly C are installed from front to back at the front of the device base 8, the head pulley gantry support 15 is vertically welded on the device base 8, the head pulley assembly D is installed on the turnover frame assembly C, and the turnover frame assembly C is fixedly connected with the head pulley gantry support 15 during production. One end of the flexible sucker rod 12 is wound in the spiral groove of the winding roller 7, the other end of the flexible sucker rod 12 enters the outlet end of the wellhead 14 through the head pulley 13, and is connected with the oil pump after the head pulley assembly D; when the sucker rod 12 descends along the wellhead, the volute spring assembly B is in an energy storage state, as shown in Figure 6 ; when the sucker rod 12 ascends along the inlet, the volute spring assembly B is in a release state, as shown in Figure 9 . During operation, the turnover frame assembly C is separated from the head pulley gantry support 15, and is turned over to the power part A side and suspended and fixed.

[0032] As shown in Figure 7 , Figure 8 , Figure 10 , Figure 11 and Figure 12 , the power part A includes a speed reducer base 9, a suspension beam 11, an electromagnetic brake base 10, a permanent magnet synchronous direct drive motor 6, a speed reducer 5 and an electromagnetic brake 4, the speed reducer base 9 and the suspension beam 11 are welded on the device base 8, the electromagnetic brake base 10 is fixedly arranged on the suspension beam 11, the speed reducer 5 is arranged on the speed reducer base 9, the electromagnetic brake 4 is fixedly arranged on the electromagnetic brake base 10, and the permanent magnet synchronous direct drive motor 6 is fixedly arranged on the speed reducer base 9 to provide power for the speed reducer, the input shaft and the output shaft of the speed reducer 5 are left and right end heads respectively, the right end head of the input shaft is connected with the motor 6, and the left end head of the input shaft is connected with the brake drum of the electromagnetic brake 4 through a key bar.

[0033] As shown in Figure 4 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, the volute spring assembly B includes a volute spring housing 1, a volute spring 2 and a volute spring roller core 3, the volute spring housing 1 is bolted on the suspension beam 11, the volute spring 2 is installed in the volute spring housing 1, the inner ring of the volute spring 2 is sleeved on the spring roller core 3 and the inner end of the volute spring 2 is fixedly connected with the spring roller core 3, the outer end of the volute spring 2 is fixed on the inner wall of the volute spring housing 1, and the volute spring roller core 3 is installed on the left end output shaft of the speed reducer 5 through a key bar.

[0034] In combination Figure 1 , Figure 2 , Figure 3 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14 , the turnover frame assembly C includes a turnover shaft frame 20 fixedly installed on the equipment base 8 behind the crown block portal frame 15, a turnover shaft 19 installed in the turnover shaft frame 20, a crown block turnover frame 16 hingedly connected with the turnover shaft 19 at the lower end, a ground anchor 17 fixedly installed on the equipment base 8 behind the turnover shaft frame 20, and a steel wire cable 23 connected between the crown block assembly D and the ground anchor 17, the upper part of the crown block turnover frame 16 is provided with a vertical support column 1601, and a method Lan 24 is arranged between the bottom surface of the vertical support column 1601 and the top surface of the crown block portal frame 15, which are connected with each other through connecting bolts and nuts. During operation, the crown block turnover frame 16 is separated from the crown block portal frame 15 and turned over backward until the lower end surface of the crown block turnover frame 16 is supported on the equipment base 8, then one end of the steel wire cable 23 is tied to the crown block 13 of the crown block assembly D and tightened, and the other end of the steel wire cable is tied to the ground anchor 18.

[0035] As shown in Figure 1 , Figure 3 , Figure 4 and Figure 5 , the crown block assembly D includes a support seat 22 fixedly installed on the top surface of the crown block turnover frame 16, a bearing bush seat 25 welded on the support seat 22, a crown block shaft 21 installed at both ends of the bearing bush seat 25, and a crown block 13 installed on the crown block shaft through a bearing.

[0036] As shown in Figure 1 , Figure 3 and Figure 4 , a pressing lever 18 is arranged on the equipment base 8 corresponding to the position between the crown block portal frame 15 and the crown block turnover frame 16, and the equipment base 8 is pressed tightly by the pressing lever 18 through bolts passing through the equipment base and the oil well cement platform 29 below the equipment base.

[0037] As shown in Figure 5 , Figure 13As shown, the adjusting nuts 26 are welded on the left end face of the left bearing bush seat 25 and the right end face of the right bearing bush seat 25 respectively, the adjusting bolts 27 are installed on the two adjusting nuts 26 respectively, one end of the adjusting bolts 27 is in abutment against the side end face of the sheave shaft 21 in the bearing bush seat 25, and the lock nuts 28 are installed on the adjusting bolts 27, the adjusting nuts 26, the adjusting bolts 27 and the lock nuts 28 constitute the translation fine adjustment mechanism, and the left and right positions of the sheave 13 can be finely adjusted through the left and right adjusting bolts.

[0038] The equipment base 8 has a length of ≤5m and a width of ≤2.6m. The equipment base has a size suitable for long-distance transportation and on-site installation, can directly use the oil well cement platform of the standard oil pumping unit of crude oil, and does not need to be constructed additionally, thereby reducing operation cost and labor cost and shortening installation time.

[0039] Working process:

[0040] The equipment base 8 is manufactured in a production enterprise, has a size meeting the requirements of highway transportation, and is not over wide, over high or over heavy. After arriving at the oil well site, the equipment base 8 is hoisted to the oil well cement platform 29 by a crane to be initially positioned, and then the power part A, the volute spring assembly B, the winding roller 7, the turnover frame assembly C and the sheave assembly D are installed on the equipment base 8 in sequence. The sheave assembly D is adjusted so that the tangent of the sheave 13 is aligned with the well center, and then the equipment base 8 is firmly pressed on the oil well cement platform 29 by the press lever 18 to complete the installation of the pumping unit.

[0041] After the installation of the pumping unit is completed, the flexible sucker rod 12 is pulled out from the winding roller 7, is vertically introduced to the oil well through the sheave 13 and is connected with the sucker rod in the oil well. At this time, the installation and connection of the pumping unit, the sucker rod and the oil pump are completed, and the production condition of crude oil is met.

[0042] After the pumping unit is powered and operated, the positive and negative rotation of the winding roller 7 is realized through the control of the positive and negative rotation of the permanent magnet synchronous direct drive motor 6, the flexible sucker rod 12 spirally wound on the winding roller 7 moves in two directions, the flexible sucker rod 12 pulls the sucker rod in the oil well to move up and down after passing through the sheave 13, and the production of crude oil is realized. When the sucker rod in the oil well moves downward, the weight of the sucker rod is the power of downward movement, in order to control the speed, the volute spring assembly B plays a role in increasing the damping, and the volute spring assembly B is wound tighter in the downward movement process, and the kinetic energy of downward movement is converted into elastic energy, and the volute spring assembly B realizes energy storage. When the sucker rod in the oil well moves upward under the action of the power part A, the volute spring assembly B is in a state of releasing elastic energy, and the power part A is assisted to drive the sucker rod in the oil well to move upward, and the underground crude oil is lifted to the ground.

[0043] When the oil well is shut down, the flexible sucker rod 12 is disconnected from the oil pump rod in the oil well, the power part A is operated to wind the flexible sucker rod 12 on the winding roller 7, the connecting bolt of the method Lan 24 is removed, the turnover frame assembly C is separated from the sheave gantry support 15, the end of the flexible sucker rod 12 is connected with the sheave assembly D, the power part A is started, the winding roller 7 rotates, the turnover frame assembly C and the sheave assembly D are rotated around the turnover shaft 19 by the flexible sucker rod 12, the sheave assembly D is away from the wellhead, and space is left for operation. The turning angle of the turnover frame assembly C and the sheave assembly D is determined by the shape of the bottom of the turnover frame 16. After the turnover frame assembly C and the sheave assembly D are turned to the position, the steel wire pull rope 23 is used to pull and fix the turnover frame assembly C and the sheave assembly D on the ground anchor 17, and the operation preparation is completed.

[0044] After the operation is completed, the steel wire pull rope 23 is loosened, the power part A is started, the winding roller 7 rotates, the turnover frame assembly C and the sheave assembly D are turned to the sheave gantry support 15 under the action of the gravity moment, the method Lan 24 is aligned and fastened by the bolt connection, and the production operation is completed.

[0045] The above is only a specific embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An energy-saving oil pumping unit that utilizes spring-stored energy to balance the work done in each up-and-down stroke, comprising an equipment foundation (8), with a power unit A installed at the rear of the equipment foundation, characterized in that: On the equipment foundation, a spiral spring assembly B and a take-up roller (7) are respectively installed on the left and right sides of the power section A. The output shaft of the power section A has left and right end protrusions, which are respectively connected to the corresponding spiral spring assembly B and take-up roller. A flexible sucker rod (12) is spirally wound on the take-up roller. A sheave gantry bracket (15) and a tilting frame assembly C are installed from front to back at the front of the equipment foundation. A sheave assembly D is installed on the tilting frame assembly C. During production, the tilting frame assembly C is fixedly connected to the sheave gantry bracket and the... The lead-out end of the flexible sucker rod (12) passes around the sheave assembly D and faces the wellhead (14). When the flexible sucker rod moves down along the wellhead, the spiral spring assembly B is in an energy storage state. When the flexible sucker rod moves up along the wellhead, the spiral spring assembly B is in a released state. During operation, the tilting frame assembly C disengages from the sheave gantry support (15) and tilts backward and is fixed. The tilting frame assembly C includes a tilting shaft frame (20) fixedly installed on the equipment foundation (8) behind the sheave gantry support (15), and a tilting shaft frame installed inside the tilting shaft frame. The equipment includes a tilting shaft (19), a sheave tilting frame (16) with its lower end hinged to the tilting shaft (19), a ground anchor (17) fixedly installed on the equipment foundation (8) behind the tilting shaft frame (20), and a steel wire rope (23) connecting the sheave assembly D and the ground anchor (17). The sheave tilting frame (16) is provided with a vertical support column (1601) on its upper part, and a flange (24) is provided between the bottom surface of the vertical support column and the top surface of the sheave gantry support (15) to connect them to each other. During operation, the sheave tilting frame (16) moves backward. The spiral spring assembly B is flipped over and supported on the equipment foundation (8) and tightened and fixed by steel wire rope (23). The spiral spring assembly B includes a spiral spring housing (1), a spiral spring (2) and a spiral spring roller core (3). The spiral spring housing (1) is installed on the equipment foundation (8). The inner ring of the spiral spring (2) is fitted on the spiral spring roller core (3) and the inner end of the spiral spring (2) is fixedly connected to the spring roller core (3). The outer end of the spiral spring (2) is fixed on the inner wall of the spiral spring housing (1).

2. The energy-saving oil pumping unit according to claim 1, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: A pressure bar (18) is installed on the equipment foundation (8) at the position between the sheave gantry bracket (15) and the tilting frame assembly C. The pressure bar (18) is used to press the equipment foundation firmly by bolts that pass through the equipment foundation and are connected to the screw holes on the oil well cement platform (29) located below the equipment foundation.

3. The energy-saving oil pumping unit according to claim 1, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: The power unit A includes a motor (6), a reducer (5) and a brake (4). The motor (6) is fixed on the reducer base (9) to provide power to the reducer. The input shaft and output shaft of the reducer (5) are respectively connected to the left and right ends. The left and right ends of the input shaft of the reducer (5) are respectively connected to the brake (4) and the motor (6).

4. The energy-saving oil pumping unit according to claim 1, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: The sheave assembly D includes a support base (22), a bearing seat (25), a sheave shaft (21), and a sheave (13). The support base (22) is fixedly installed on the top surface of the sheave tilting frame (16). The bearing seat (25) is fixedly installed on the support base (22). The sheave (13) is installed on the sheave shaft (21). Both ends of the sheave shaft (21) are installed on the bearing seat (25).

5. The energy-saving oil pumping unit according to claim 4, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: Adjusting nuts (26) are welded to the left end face of the bearing seat (25) on the left side and the right end face of the bearing seat (25) on the right side. Adjusting bolts (27) are installed on the two adjusting nuts (26). The adjusting bolts are located inside the bearing seat (25) with one end abutting against the side end face of the sheave shaft (21). Anti-loosening nuts (28) are also installed on the adjusting bolts (27). The adjusting nuts (26), adjusting bolts (27) and anti-loosening nuts (28) constitute a translation fine adjustment mechanism. The left and right positions of the sheave (13) can be finely adjusted by adjusting bolts on the left and right sides.

6. The energy-saving oil pumping unit according to claim 3, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: A reducer base (9) and a suspension beam (11) are fixed on the equipment foundation (8). A brake base (10) is fixed on the suspension beam (11). The reducer (5) is set on the reducer base (9). The brake (4) is fixed on the brake base (10). The motor (6) is fixed on the reducer base (9).

7. The energy-saving oil pumping unit according to claim 3, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: The motor (6) is a permanent magnet synchronous direct drive motor, and the brake (4) is an electromagnetic brake.

8. The energy-saving oil pumping unit according to claim 1, which utilizes spring-stored energy to balance the work done in each stroke, is characterized in that: The length of the equipment foundation (8) is ≤5m and the width is ≤2.6m.

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