Operation equipment based on super-long stroke pumping unit and control method

Abstract

The invention provides operation equipment based on an ultra-long stroke oil pumping unit and a control method, the operation equipment comprises an oil pumping system, the oil pumping system comprises a motor, the motor is connected with a roller, a flexible polish rod is wound on the roller, the oil pumping system further comprises a head sheave, and the free end of the flexible polish rod bypasses the head sheave and then is hung with an oil pumping pipe column. The two sets of energy-saving systems are symmetrically installed at the two shaft ends of the head sheave center shaft, the first energy-saving system is used for driving the flexible polish rod to move upwards when executing an upstroke, and the second energy-saving system is used for driving the flexible polish rod to move downwards when executing a downstroke. The oil pumping system assists the oil pumping system to drive the flexible polish rod to move upwards or downwards, in the process, energy in the energy-saving system is stored and released repeatedly, namely, the energy-saving system is used for providing driving force for normal operation of the super-long stroke oil pumping unit, and therefore input of external electric energy is reduced, and energy is saved. The consumption of electric energy in the oil extraction process of the ultra-long stroke pumping unit is reduced, and meanwhile, the oil extraction structure of the original ultra-long stroke pumping unit is not changed.

Description

Technical Field

[0001] The invention belongs to the field of oil production equipment, and in particular relates to operating equipment and a control method based on an ultra-long stroke oil pumping unit. Background Art

[0002] The ultra-long stroke pumping unit oil production technology is a technology developed to improve the oil production efficiency of low-yield wells. It has the characteristics of simple structure, ultra-long stroke, and ultra-low stroke. It has strong advantages in improving system efficiency and reducing pipe and rod eccentric wear. Compared with the traditional walking beam pumping unit, the ultra-long stroke pumping unit oil production technology eliminates the walking beam, belt drive, crank four-link and other mechanisms. It has a simple structure, fewer moving parts, and reduces the safety risk of operation.

[0003] The emergence of ultra-long stroke pumps has revolutionized the design concept of beam pumps, but they also have some shortcomings: all the energy required during operation is external electrical energy input, and there is no mutual conversion and utilization of energy, resulting in relatively large energy consumption. Summary of the invention

[0004] The purpose of the present invention is to provide an operating device and a control method based on an ultra-long stroke oil pumping unit to overcome the above-mentioned technical defects.

[0005] In order to solve the above technical problems, the present invention provides an operating device based on an ultra-long stroke oil pumping unit, which includes an oil pumping system, the oil pumping system includes a motor, the output shaft of the motor is connected to a drum, a flexible polished rod is wound on the drum, the oil pumping system also includes a sheave mounted on a sheave bracket, a pumping string is suspended on the free end of the flexible polished rod after bypassing the sheave, a sheave central axis is inserted in the center of the sheave, and the oil pumping system also includes two energy-saving systems symmetrically installed at the two ends of the sheave central axis, the two energy-saving systems are:

[0006] A first energy-saving system is installed at the first end of the central axis of the sky wheel, so that the first energy-saving system drives the flexible polished rod to move upward when performing an upward stroke;

[0007] A second energy-saving system is installed at the second end of the central axis of the sky wheel, so that the flexible polished rod is driven by the second energy-saving system to move downward when performing a downstroke.

[0008] The first energy-saving system and the second energy-saving system have the same structure, both of which include energy storage transmission shafts, and the two energy storage transmission shafts are respectively connected to the two ends of the central shaft of the sky wheel through couplings;

[0009] It also includes a transmission rope, one end of which is connected to the energy storage transmission shaft, and the other end is connected to a fixed joint, the fixed joint is arranged on the energy storage bracket, and the energy storage bracket is installed on a base located below the sky wheel bracket;

[0010] The energy storage bracket is provided with a fixed pulley block and a movable pulley block arranged up and down, and the transmission rope from the energy storage transmission shaft is S-shaped and then fixed to the fixed joint after passing through the movable pulley block and the fixed pulley block;

[0011] The movable pulley block is connected with an energy storage device.

[0012] The energy storage device includes an energy storage bin push rod and an energy storage bin;

[0013] The movable pulley block is connected to the energy storage bin push rod, and the energy storage bin push rod is installed in the energy storage bin filled with energy storage medium. When the movable pulley block compresses the energy storage medium through the energy storage bin push rod, the energy storage bin stores energy.

[0014] During the upstroke, the energy storage device in the first energy-saving system stores energy, while the energy storage device in the second energy-saving system releases energy;

[0015] During the downstroke, the energy storage device in the first energy-saving system releases energy, while the energy storage device in the second energy-saving system stores energy.

[0016] The operation equipment based on the ultra-long stroke oil pumping unit also includes a control system, which includes a data acquisition module, a data receiving and analyzing module, and a command sending module;

[0017] The data acquisition module is used to collect power data, and is composed of power sensors installed on the energy storage bin push rod, the center shaft of the sky wheel, the energy storage transmission shaft and the motor transmission shaft respectively;

[0018] The data receiving and analyzing module is used to receive the power data collected by the data collecting module and calculate the input power of the motor;

[0019] The command sending module sends the input power of the motor to the motor.

[0020] The operating equipment based on the ultra-long stroke oil pump is also packaged with a control cabinet, and the data acquisition module and the data receiving and analyzing module are both packaged in the control cabinet.

[0021] The energy storage medium is nitrogen or inert gas.

[0022] The energy storage medium is a spring.

[0023] The present invention also provides a control method based on an ultra-long stroke oil pumping unit, which is used to control the application of an operating device based on an ultra-long stroke oil pumping unit, comprising:

[0024] Obtaining the power P1 provided to the energy storage transmission shaft by the first energy-saving system or the second energy-saving system when the first energy-saving system or the second energy-saving system operates alone in an upstroke or a downstroke;

[0025] Get the power P2 required by the center shaft of the crown wheel when the pumping system is operating alone in the upstroke or downstroke when the energy-saving system is not connected;

[0026] Calculate the power that the motor needs to provide to the center axis of the sky wheel: P3 = P2 - P1;

[0027] Calculate the motor input power P required to provide power P3 to the center axis of the sky wheel;

[0028] During each upstroke or downstroke, the motor operates with input power P.

[0029] Power P1 and / or power P2 are obtained, wherein the obtaining method is calculation or actual testing.

[0030] The beneficial effects of the present invention are as follows:

[0031] Energy-saving systems are installed on both sides of the traditional oil pumping unit's crown wheel. When the oil pumping system is in an upstroke or a downstroke, the oil pumping system assists the oil pumping system in driving the flexible bare rod up or down. During this process, the internal energy of the energy-saving system is constantly in a process of repeated storage and release. That is, the energy-saving system is used to provide driving force for the normal operation of the ultra-long stroke oil pumping unit, thereby reducing the input of external electrical energy and reducing the consumption of electrical energy during the oil production process of the ultra-long stroke oil pumping unit, while not changing the original oil production structure of the ultra-long stroke oil pumping unit.

[0032] In order to make the above contents of the present invention more clearly understood, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the operating equipment based on the ultra-long stroke oil pump.

[0034] Description of reference numerals:

[0035] 10. Motor; 20. Drum; 30. Flexible polished rod; 40. Sheave bracket; 41. Sheave; 42. Sheave central axis; 50. Base; 60. Pumping string; 70. Shield; 80. Control cabinet; 91. Energy storage transmission shaft; 92. Transmission rope; 93. Fixed joint; 94. Energy storage bracket; 95. Fixed pulley block; 96. Movable pulley block; 97. Energy storage bin push rod; 98. Energy storage bin. DETAILED DESCRIPTION

[0036] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0037] It should be noted that, in the present invention, the up, down, left and right in the figure are regarded as the up, down, left and right of the operating equipment based on the ultra-long stroke oil pump described in this specification.

[0038] The exemplary embodiments of the present invention are now described with reference to the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to disclose the present invention in detail and completely and to fully convey the scope of the present invention to those skilled in the art. The terms used in the exemplary embodiments shown in the accompanying drawings are not intended to limit the present invention. In the accompanying drawings, the same units / elements are marked with the same reference numerals.

[0039] Unless otherwise specified, the terms (including technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it is understood that the terms defined in commonly used dictionaries should be understood to have the same meanings as those in the context of the relevant fields, and should not be understood as idealized or overly formal meanings.

[0040] by Figure 1 When the energy-saving system shown is the first energy-saving system, the energy-saving system on the other side (rear view) is the second energy-saving system. Figure 1 The rotation direction of the center axis 42 of the sky wheel is described as an example.

[0041] This embodiment involves an operating device based on an ultra-long stroke pumping unit, see Figure 1 It includes an oil pumping system and an energy-saving system, wherein the oil pumping system includes a motor 10, the output shaft of the motor 10 is connected to a drum 20, a flexible light rod 30 is wound on the drum 20, the oil pumping system also includes a sheave 41 mounted on a sheave bracket 40, a free end of the flexible light rod 30 is suspended with an oil pumping string 60 after passing around the sheave 41, and a sheave center axis 42 is inserted in the center of the sheave 41.

[0042] The operating equipment based on the ultra-long stroke pumping unit also includes two energy-saving systems symmetrically installed at the two ends of the center axis 42 of the sky wheel. The two energy-saving systems are:

[0043] A first energy-saving system is installed at the first end of the center axis 42 of the sky wheel, so that the first energy-saving system drives the flexible light rod 30 to move upward when performing an upstroke; a second energy-saving system is installed at the second end of the center axis 42 of the sky wheel, so that the second energy-saving system drives the flexible light rod 30 to move downward when performing a downstroke.

[0044] The stroke of the ultra-long stroke oil pump is as long as one hundred meters or even hundreds of meters, and this stroke cannot be achieved by using only the output power of the motor 10. Therefore, the role of the energy-saving system in this embodiment is to supplement power so that the ultra-long stroke oil pump reaches the target stroke. Here, the energy-saving system and the oil pumping system assist in providing power for the ultra-long stroke oil pump.

[0045] Please continue reading Figure 1The first energy-saving system and the second energy-saving system have the same structure, both of which include an energy storage transmission shaft 91. The two energy storage transmission shafts 91 are connected to both ends of the center shaft 42 of the sky wheel through couplings.

[0046] The energy-saving system also includes a transmission rope 92, one end of which is connected to the energy storage transmission shaft 91, and the other end is connected to a fixed joint 93. The fixed joint 93 is arranged on an energy storage bracket 94, and the energy storage bracket 94 is installed on a base 50 located below the sky wheel bracket 40.

[0047] The transmission rope 92 is any flexible and windable rope, and the ropes on both sides are wound in opposite directions on the energy storage transmission shaft 91, that is, when the rope on one side is wound in a clockwise direction, the rope on the other side is wound in a counterclockwise direction.

[0048] The energy storage bracket 94 is provided with a fixed pulley block 95 and a movable pulley block 96 arranged up and down. The transmission rope 92 from the energy storage transmission shaft 91 is S-shaped and passes through the movable pulley block 96 and the fixed pulley block 95 and is fixed to the fixed joint 93. The fixed joint 93 can be a bolt, a pin, a fixed column, etc., which is located at Figure 1 Near the middle fixed pulley block 95 , the fixed pulley block 95 is fixed on the top of the energy storage bracket 94 .

[0049] For the arrangement of the fixed pulley block 95 and the movable pulley block 96, please refer to Figure 1 .

[0050] The movable pulley group 96 is connected to an energy storage device, which includes an energy storage bin push rod 97 and an energy storage bin 98 that are connected to each other. Specifically, the movable pulley group 96 is arranged in a straight line and connected to the energy storage bin push rod 97 respectively. The energy storage bin push rod 97 is installed in the energy storage bin 98 filled with an energy storage medium. When the movable pulley group 96 compresses the energy storage medium through the energy storage bin push rod 97, the energy storage bin 98 stores energy.

[0051] The working process / principle of the oil pumping system and energy-saving system are as follows:

[0052] During the upstroke, the pumping system and the energy-saving system jointly drive the central axis 42 of the sheave at the top of the ultra-long stroke pumping unit to rotate counterclockwise (from the front view). Figure 1 ), the flexible polished rod 30 drives the pumping pipe string 60 upward to complete the operation of the upper stroke of the ultra-long stroke pumping unit; at this time, the energy storage device in the first energy-saving system (or the second energy-saving system) stores energy to provide counterclockwise rotation power for the center axis 42 of the sky wheel, and at the same time, the energy storage device in the second energy-saving system (or the first energy-saving system) releases energy;

[0053] During the downstroke, the energy storage device in the second energy-saving system (or the first energy-saving system) starts to release energy, and the energy storage device in the second energy-saving system (or the first energy-saving system) and the motor 10 of the pumping system jointly drive the central axis 42 of the top of the ultra-long stroke pumping unit to rotate clockwise (from the front view). Figure 1 ), the flexible light rod 30 drives the pumping pipe 60 downward to complete the operation of the ultra-long stroke pumping unit's upward stroke; at this time, the energy storage device in the first energy-saving system (or the second energy-saving system) releases energy, and at the same time, the energy storage device in the second energy-saving system (or the first energy-saving system) stores energy.

[0054] That is to say, no matter the flexible polished rod 30 drives the pumping pipe string 60 upward or downward, one of the two energy-saving systems must release energy and the other energy-saving system must store energy.

[0055] A sensor is installed on the energy storage bin push rod 97 to detect the movement position of the energy storage bin push rod 97 and the amount of energy in the energy storage bin 98. A drive controller is also installed on the energy storage bin push rod 97 to control the running speed of the energy storage bin push rod 97.

[0056] The operation equipment based on the ultra-long stroke pumping unit also includes a control system, which includes a data acquisition module, a data receiving and analyzing module, and an instruction sending module. The data acquisition module and the data receiving and analyzing module are both packaged in a control cabinet 80, which is installed in the control cabinet 80. Figure 1 Near the oil pumping system.

[0057] The data acquisition module is used to collect power data, and is composed of power sensors respectively installed on the energy storage bin push rod 97, the center shaft of the sky wheel 42, the energy storage transmission shaft 91 and the motor transmission shaft.

[0058] The data receiving and analyzing module is used to receive the power data collected by the data collecting module and calculate the input power of the motor 10 .

[0059] The instruction sending module sends the input power of the motor 10 to the motor 10 .

[0060] The operating principles of the oil pumping system and the energy-saving system will be explained in detail below.

[0061] About the operation of the oil pumping system:

[0062] Upstroke: The control system controls the motor 10 to rotate counterclockwise, the motor 10 drives the roller 20 to rotate counterclockwise, and drives the sky wheel 41 to rotate counterclockwise through the flexible polished rod 30 (front view) Figure 1 ), one end of the flexible polished rod 30 is wound around the drum 20, and the other end moves upward, driving the pumping pipe string 60 to complete the upstroke operation of the ultra-long stroke pumping unit.

[0063] Down stroke: The control system controls the motor 10 to rotate clockwise, the motor 10 drives the roller 20 to rotate clockwise, and the flexible polished rod 30 drives the sky wheel 41 to rotate clockwise (front view) Figure 1 ), the flexible polished rod 30 with one end wound around the drum 20 leaves the drum 20, and the other end moves downward, driving the pumping pipe string 60 to complete the downstroke operation of the ultra-long stroke pumping unit.

[0064] The following will take the example of the transmission rope 92 of the first energy-saving system being wound counterclockwise around the energy storage transmission shaft 91 to illustrate the working process of the operating equipment based on the ultra-long stroke oil pump.

[0065] Energy-saving system operation:

[0066] The energy-saving system is initially installed and set up. One end of the transmission rope 92 of the first energy-saving system is wound around the energy storage transmission shaft 91, and the movable pulley group 96 is located close to the fixed pulley group 95; the transmission rope 92 is not wound around the energy storage transmission shaft 91 of the second energy-saving system, and the movable pulley group 96 is located far away from the fixed pulley group 95.

[0067] Upstroke: The energy storage bin 98 of the second energy-saving system releases energy, and at the same time, the movable pulley set 96 and the energy storage bin push rod 97 of the second energy-saving system move upward, driving the energy storage transmission shaft 91 to rotate counterclockwise through the transmission rope 92 (front view) Figure 1 ), driving the center shaft 42 of the sky wheel and the energy storage transmission shaft 91 to rotate counterclockwise (front view Figure 1 ); and the transmission rope 92 wound around the energy storage transmission shaft 91 in the first energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, and the energy storage bin 98 of the first energy-saving system starts to store energy.

[0068] Downstroke: The energy storage bin 98 of the first energy-saving system releases energy, and at the same time, the movable pulley group 96 and the energy storage bin push rod 97 of the first energy-saving system move upward, driving the energy storage transmission shaft 91 to rotate clockwise through the transmission rope 92 (front view) Figure 1 ), the transmission rope 92 is wound around the energy storage transmission shaft 91, driving the center shaft 42 of the sky wheel and the energy storage transmission shaft 91 to rotate clockwise together (front view Figure 1 ); and the transmission rope 92 wound around the energy storage transmission shaft 91 in the second energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, and the energy storage bin 98 of the second energy-saving system starts to store energy.

[0069] When the energy storage medium is nitrogen or inert gas, a seal is installed at the contact position of the energy storage bin push rod 97 and the energy storage bin 98 to ensure that the energy storage medium does not leak out. At this time, the working process of the operation equipment based on the ultra-long stroke pumping unit is as follows:

[0070] Upstroke: The compressed nitrogen or inert gas in the energy storage bin 98 of the second energy-saving system releases energy, and the movable pulley set 96 and the energy storage bin push rod 97 move upward, driving the energy storage transmission shaft 91 to rotate counterclockwise through the transmission rope 92 (front view) Figure 1 ), the energy storage transmission shaft 91 provides counterclockwise rotation power for the center shaft 42 of the sky wheel; the transmission rope 92 wound on the energy storage transmission shaft 91 in the first energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, compressing the energy storage medium in the energy storage bin 98 to start energy storage. Figure 1 The center shaft 42 of the sheave drives the sheave 41 to rotate, thereby driving the flexible polished rod 30 to move upward, and the flexible polished rod 30 drives the pumping string 60 upward to complete the upstroke operation of the ultra-long stroke pumping unit;

[0071] Downstroke: The compressed energy storage medium in the energy storage bin 98 of the first energy-saving system releases energy, the movable pulley set 96 and the energy storage bin push rod 97 move upward, and the energy storage transmission shaft 91 rotates clockwise through the transmission rope 92 (front view) Figure 1 ), the energy storage transmission shaft 91 provides clockwise rotation power for the center shaft 42 of the sky wheel, and at the same time, driven by the motor 10, the center shaft 42 of the sky wheel and the energy storage transmission shafts 91 at both ends rotate clockwise together (front view Figure 1 ); The transmission rope 92 on the energy storage transmission shaft 91 of the second energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, compressing the energy storage medium in the energy storage bin 98 to start energy storage. Figure 1 The center shaft 42 of the sheave drives the sheave 41 to rotate, thereby driving the flexible polished rod 30 to move downward, and the flexible polished rod 30 drives the pumping pipe string 60 downward to complete the downstroke operation of the ultra-long stroke pumping unit.

[0072] When the energy storage medium is a spring, a spring group is installed in the energy storage chamber 98, and energy storage and release are completed through compression and rebound of the spring. At this time, the working process of the operating equipment based on the ultra-long stroke pumping unit is as follows:

[0073] Upstroke: The compressed spring group in the energy storage bin 98 of the second energy-saving system releases energy, and the movable pulley group 96 and the energy storage bin push rod 97 move upward, driving the energy storage transmission shaft 91 to rotate counterclockwise through the transmission rope 92 (front view) Figure 1 ), the energy storage transmission shaft 91 provides counterclockwise rotation power for the center shaft 42 of the sky wheel, and at the same time, driven by the motor 10, drives the center shaft 42 of the sky wheel and the energy storage transmission shafts 91 at both ends to rotate counterclockwise together; the transmission rope 92 wound on the energy storage transmission shaft 91 in the first energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, and the spring group in the energy storage bin 98 is compressed to start energy storage. At this time, look straight ahead Figure 1The center shaft 42 of the sheave drives the sheave 41 to rotate, thereby driving the flexible polished rod 30 to move upward, and the flexible polished rod 30 drives the pumping string 60 upward to complete the upstroke operation of the ultra-long stroke pumping unit;

[0074] Down stroke: The compressed spring group in the energy storage bin 98 of the first energy-saving system releases energy, the movable pulley group 96 and the energy storage bin push rod 97 move upward, and the energy storage transmission shaft 91 rotates clockwise through the transmission rope 92 (front view) Figure 1 ), the energy storage transmission shaft 91 provides clockwise rotation power for the center shaft 42 of the sky wheel, and at the same time, driven by the motor 10, the center shaft 42 of the sky wheel and the energy storage transmission shafts 91 at both ends rotate clockwise together (front view Figure 1 ); The transmission rope 92 on the energy storage transmission shaft 91 of the second energy-saving system moves downward, the movable pulley group 96 and the energy storage bin push rod 97 move downward, and the spring group in the energy storage bin 98 is compressed to start energy storage. Figure 1 The center shaft 42 of the sheave drives the sheave 41 to rotate, thereby driving the flexible polished rod 30 to move downward, and the flexible polished rod 30 drives the pumping pipe string 60 downward to complete the downstroke operation of the ultra-long stroke pumping unit.

[0075] The present invention also provides a control method based on an ultra-long stroke oil pumping unit, which is used to control the application of an operating device based on an ultra-long stroke oil pumping unit, comprising:

[0076] Step 100, obtaining the power P1 provided by the first energy-saving system or the second energy-saving system to the energy storage transmission shaft 91 when the first energy-saving system or the second energy-saving system operates alone in the upstroke or downstroke, where P1 can be obtained by theoretical calculation or actual test.

[0077] Step 200, when the energy-saving system is not connected, the power P2 required by the central shaft 42 of the overhead sheave when the oil pumping system operates alone in the upstroke or downstroke is obtained. Here, P2 can be obtained by theoretical calculation or actual test.

[0078] Step 300, calculating the power P3=P2-P1 that the motor 10 needs to provide to the center shaft 42 of the sky wheel;

[0079] Step 400, calculating the input power P of the motor 10 required to provide the power P3 to the center shaft 42 of the sky wheel;

[0080] In step 500, the motor 10 operates with an input power P during each upstroke or downstroke.

[0081] It is worth mentioning that the control system controls the motor 10 to run with an input power P, where P is a variable.

[0082] Based on the energy-saving system in the operation equipment of the ultra-long stroke pumping unit, the power P1 is obtained by operating alone, and the pumping system is obtained by operating alone to obtain the power P2. The control system controls the motor 10 to operate at the power P, specifically:

[0083] Upstroke: the motor 10 and the energy storage transmission shaft 91 jointly drive the center shaft 42 of the sky wheel to rotate counterclockwise, driving the flexible polished rod 30 to move upward, and the flexible polished rod 30 drives the pumping string 60 upward to complete the upstroke operation of the ultra-long stroke pumping unit;

[0084] Downstroke: the motor 10 and the energy storage transmission shaft 91 jointly drive the central shaft 42 of the crown wheel to rotate clockwise, driving the flexible polished rod 30 to move downward, and the flexible polished rod 30 drives the pumping pipe string 60 downward to complete the downstroke operation of the ultra-long stroke pumping unit.

[0085] In summary, the operating equipment provided in this embodiment mainly includes three parts: an oil pumping system, an energy-saving system and a control system. The oil pumping system mainly realizes the oil pumping function of the oil pumping unit; the energy-saving system provides power for the operation of the ultra-long stroke oil pumping unit by storing and releasing the internal energy of the energy-saving system; the control system mainly collects, calculates and analyzes the operation of the oil pumping system and the energy-saving system.

[0086] This implementation method utilizes the energy conservation principle to continuously provide power for the operation of the ultra-long stroke oil pumping unit, greatly reducing the input of electrical energy and the consumption of electrical energy during the oil production process of the ultra-long stroke oil pumping unit, while not changing the original oil production structure of the ultra-long stroke oil pumping unit.

[0087] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An operating device based on an ultra-long stroke oil pumping unit, comprising an oil pumping system, wherein the oil pumping system comprises a motor (10), wherein the output shaft of the motor (10) is connected to a drum (20), wherein a flexible polished rod (30) is wound around the drum (20), wherein the oil pumping system further comprises a sheave (41) mounted on a sheave bracket (40), wherein a pumping pipe string (60) is suspended from the free end of the flexible polished rod (30) after passing around the sheave (41), wherein a sheave central axis (42) is inserted in the center of the sheave (41), wherein: It also includes two energy-saving systems symmetrically installed at the two ends of the center axis (42) of the sky wheel, and the two energy-saving systems are: A first energy-saving system is installed at the first end of the center axis (42) of the sky wheel, so that the first energy-saving system drives the flexible polished rod (30) to move upward when performing an upward stroke; A second energy-saving system is installed at the second end of the center shaft (42) of the sky wheel, so that the second energy-saving system drives the flexible polished rod (30) to move downward when performing a downward stroke.

2. The operating equipment based on the ultra-long stroke oil pumping unit according to claim 1 is characterized in that: The first energy-saving system and the second energy-saving system have the same structure, and both comprise an energy storage transmission shaft (91), wherein the two energy storage transmission shafts (91) are respectively connected to two ends of the center shaft (42) of the sky wheel through couplings; It also includes a transmission rope (92), one end of the transmission rope (92) is connected to the energy storage transmission shaft (91), and the other end is connected to a fixed joint (93), the fixed joint (93) is arranged on an energy storage bracket (94), and the energy storage bracket (94) is installed on a base (50) located below the sky sheave bracket (40); A fixed pulley group (95) and a movable pulley group (96) arranged up and down are installed on the energy storage bracket (94); the transmission rope (92) from the energy storage transmission shaft (91) is in an S shape and is fixed to the fixed joint (93) after passing through the movable pulley group (96) and the fixed pulley group (95); The movable pulley group (96) is connected to an energy storage device.

3. The operating equipment based on the ultra-long stroke pumping unit according to claim 2 is characterized in that: The energy storage device comprises an energy storage bin push rod (97) and an energy storage bin (98); The movable pulley group (96) is connected to the energy storage bin push rod (97), and the energy storage bin push rod (97) is installed on an energy storage bin (98) filled with an energy storage medium. When the movable pulley group (96) compresses the energy storage medium through the energy storage bin push rod (97), the energy storage bin (98) stores energy.

4. The operating equipment based on the ultra-long stroke pumping unit according to claim 2 or 3, characterized in that: During the upstroke, the energy storage device in the first energy-saving system stores energy, while the energy storage device in the second energy-saving system releases energy; During the downstroke, the energy storage device in the first energy-saving system releases energy, while the energy storage device in the second energy-saving system stores energy.

5. The operating equipment based on the ultra-long stroke pumping unit according to claim 3 is characterized in that: It also includes a control system, which includes a data acquisition module, a data receiving and analyzing module, and an instruction sending module; The data acquisition module is used to collect power data, and is composed of power sensors respectively installed on the energy storage bin push rod (97), the center shaft of the sky wheel (42), the energy storage transmission shaft (91) and the motor transmission shaft; The data receiving and analyzing module is used to receive the power data collected by the data collecting module and calculate the input power of the motor (10); The instruction sending module sends the input power of the motor (10) to the motor (10).

6. The operating equipment based on the ultra-long stroke oil pumping unit according to claim 5 is characterized in that: A control cabinet (80) is also packaged, and the data acquisition module and the data receiving and analyzing module are both packaged in the control cabinet (80).

7. The operating equipment based on the ultra-long stroke pumping unit according to claim 3 is characterized in that: The energy storage medium is nitrogen or an inert gas.

8. The operating equipment based on the ultra-long stroke oil pumping unit according to claim 3 is characterized in that: The energy storage medium is a spring.

9. A control method based on an ultra-long stroke oil pumping unit, used for controlling the application of an operating device based on an ultra-long stroke oil pumping unit as claimed in any one of claims 2 to 8, characterized in that: include: Acquiring power P1 provided by the first energy-saving system or the second energy-saving system to the energy storage transmission shaft (91) when the first energy-saving system or the second energy-saving system operates alone in an upstroke or a downstroke; Obtaining the power P2 required by the central shaft (42) of the sky wheel when the oil pumping system is operating alone in an upstroke or a downstroke when the energy-saving system is not connected; Calculating the power P3=P2-P1 that the motor (10) needs to provide to the center shaft (42) of the sky wheel; Calculating the input power P of the motor (10) required to provide the power P3 to the center shaft (42) of the sky wheel; During each upstroke or downstroke, the motor (10) operates with input power P.

10. The control method based on the ultra-long stroke oil pumping unit according to claim 9, characterized in that: Power P1 and / or power P2 are obtained, wherein the obtaining method is calculation or actual testing.

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