Tower-type pumping unit

Abstract

The utility model relates to a tower-type pumping unit, and belongs to the technical field of oil extraction. The tower-type pumping unit comprises a rack, a motor, a reciprocating screw rod, a lubricating grease box, a screw rod protection sliding sleeve, a reciprocating lifting platform, a balance weight block and a pumping rod, a transmission mechanism is arranged between the motor and the reciprocating screw rod, the motor rotates unidirectionally to drive the reciprocating screw rod to rotate unidirectionally, a double-layer line sliding spiral track is arranged on the reciprocating screw rod, the screw rod protection sliding sleeve is arranged on the reciprocating screw rod, the screw rod protection sliding sleeve is fixedly arranged on the reciprocating lifting platform, and the balance weight block is arranged on the reciprocating lifting platform. The reciprocating lifting platform drives the sucker rod to reciprocate and lift; the lead screw protection sliding sleeve is in rolling connection or sliding connection with the reciprocating lead screw. The lubricating grease box is used for containing lubricating grease for lubricating the reciprocating lead screw. According to the tower-type pumping unit, an existing tower-type pumping unit is improved, the novel reversing mechanism is adopted to replace an original mechanical reversing mode and an electric control reversing mode, and the tower-type pumping unit has the advantages of being low in noise, convenient and fast to operate, compact in structure, high in safety and the like.

Description

Technical Field

[0001] The present application relates to a tower pumping unit, belonging to the technical field of oil production. Background Art

[0002] Currently, deep-well pumping units used in oilfield production include beam pumping units and tower pumping units. Beam pumping units have evolved into numerous models. The beam pumping unit, with its four-link structure, suffers from inherent issues such as bulk, weight, large footprint, difficulty in maintenance, difficulty in balancing, and complex operation. Tower pumping units have been the primary development in recent decades, and are categorized as mechanically and electrically controlled. The earliest tower pumping units were belt pumping units with mechanical commutation. These units relied on a special chain link to drive a commutator to swing left and right to achieve direction. Due to the large number of moving parts, these units generated noise over time, and the entire chain box required lubrication, which posed a risk of oil leaks.

[0003] Currently, most new tower pumps use inverters to control the forward and reverse rotation of the motor to achieve direction reversal. While this simplifies the mechanical components, it also presents challenges such as complex electrical components, difficult management, constant motor reversal and startup, and high energy consumption. Furthermore, these electrically reversing pumping units require auxiliary winches or electric hoists when attaching loads or adjusting the thrust distance. If the main drive belt of such a tower pumping unit breaks, the counterweight will instantly fall, generating a tremendous impact that can damage the gearbox and other components, and potentially cause personal injury due to flying iron fragments.

[0004] In view of the shortcomings of the tower pumping unit in the existing technology, there is an urgent need for a new type of pumping unit that can not only solve the problems of oil leakage, noise and large floor space occupied by the existing belt conveyor, but also solve the complex operation, high failure rate and low safety of the electrical reversing silent pumping unit, so as to meet the current mining scale and improve the production efficiency of oil wells. Utility Model Content

[0005] In order to solve the above problems, this application proposes a tower oil pumping unit, which is improved on the existing tower oil pumping unit and adopts a new reversing mechanism to replace the original mechanical reversing and electrical control reversing methods. It has the characteristics of low noise, easy operation, compact structure and high safety. It can solve the oil leakage and noise problems of existing belt conveyors and solve the operation complexity and safety problems of existing silent machines.

[0006] The present application provides a tower pumping unit, comprising a frame and a motor, a reciprocating screw, a grease box, a screw protection sleeve, a reciprocating lifting platform, a balancing weight, and a sucker rod arranged on the frame; a transmission mechanism is provided between the motor and the reciprocating screw, wherein the unidirectional rotation of the motor drives the reciprocating screw to rotate unidirectionally; a double-layer linear sliding spiral track is provided on the reciprocating screw; the screw protection sleeve is provided on the reciprocating screw; the screw protection sleeve is fixedly provided on the reciprocating lifting platform; the reciprocating lifting platform reciprocates and rises and falls under the drive of the reciprocating screw; the balancing weight is provided on the reciprocating lifting platform; the reciprocating lifting platform drives the balancing weight to reciprocate and rise and fall, thereby driving the sucker rod to reciprocate and rise and fall;

[0007] The screw rod protection sleeve is in rolling connection or sliding connection with the reciprocating screw rod. When the screw rod protection sleeve is in rolling connection with the reciprocating screw rod, the screw rod protection sleeve is provided with a ball guide; when the screw rod protection sleeve is in sliding connection with the reciprocating screw rod, the screw rod protection sleeve is provided with a crescent guide block, and the grease box is used to accommodate grease for lubricating the reciprocating screw rod.

[0008] Optionally, the transmission mechanism is an umbrella-shaped gearbox, which is used for reversing and increasing torque.

[0009] Optionally, a stabilizing auxiliary light column is further provided on the frame, and a slider which can be raised and lowered along the stabilizing auxiliary light column is provided on the reciprocating lifting platform.

[0010] Optionally, there are two stabilizing auxiliary light beams, which are arranged in an isosceles triangle with the reciprocating screw rod.

[0011] Optionally, the stabilizing auxiliary light column is connected to the slider in a sliding or rolling manner.

[0012] Optionally, the balancing weight block and the sucker rod are connected via a belt, and a roller is provided in the middle of the belt.

[0013] Optionally, an electric lead screw is further provided at the bottom of the frame, and the electric lead screw is used for the translation of the tower pumping unit as a whole.

[0014] Optionally, the electric lead screw is a worm gear electric lead screw.

[0015] Optionally, the grease box is a molybdenum disulfide grease box.

[0016] The beneficial effects of this application include but are not limited to:

[0017] 1. The tower pumping unit provided in this application replaces the belt-type pumping unit with a transmission, and adopts a method of directly connecting a reciprocating screw and a reciprocating lifting platform, thereby improving transmission efficiency and reducing maintenance workload.

[0018] 2. The tower pumping unit provided in this application uses a reciprocating roller to achieve lifting and reversing. The purely mechanical reversing structure is simple and reliable. Compared with the existing belt-type mechanical pumping unit, it can reduce noise and oil leakage, and has better safety performance than the electric reversing pumping unit.

[0019] 3. The tower pumping unit provided in this application has an umbrella gear in the umbrella gearbox that cooperates with the reciprocating screw, which not only plays a role in changing direction, but also reduces speed and increases torque, thereby improving the safety and stability of the pumping unit's reversing.

[0020] 4. The tower pumping unit provided in this application uses a crescent guide block or a ball guide in conjunction with a reciprocating screw to provide power for the ascent and descent of the reciprocating lifting platform and improve the operating stability of the reciprocating lifting platform.

[0021] 5. The tower pumping unit provided in this application adopts a stable auxiliary light column, which is arranged in an isosceles triangle with the reciprocating screw rod. It cooperates with the reciprocating lifting platform to prevent the reciprocating lifting platform from flipping, thereby improving the overall stability of the device and ensuring the normal and efficient operation of the pumping unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 This is a structural schematic diagram of the tower pumping unit involved in an embodiment of the present application.

[0024] List of parts and reference numerals:

[0025] 1. Screw protection sleeve, 2. Sucker rod, 3. Drum, 4. Belt, 5. Stabilizing auxiliary light column, 6. Reciprocating lifting platform, 7. Reciprocating screw, 8. Balancing weight, 9. Umbrella-type gearbox, 10. Motor. DETAILED DESCRIPTION

[0026] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0027] In order to more clearly understand the above-mentioned objects, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other in the absence of conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0029] In addition, in the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0031] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] refer to Figure 1 The present application provides a tower pumping unit, comprising a frame and a motor, a reciprocating screw, a grease box, a screw protection sleeve, a reciprocating lifting platform, a balancing counterweight and an oil pumping rod arranged on the frame; a transmission mechanism is provided between the motor and the reciprocating screw, the unidirectional rotation of the motor drives the reciprocating screw to rotate unidirectionally, a double-layer linear sliding spiral track is provided on the reciprocating screw, the screw protection sleeve is provided on the reciprocating screw, the screw protection sleeve is fixedly provided on the reciprocating lifting platform, the reciprocating lifting platform lifts and reciprocates under the drive of the reciprocating screw, the balancing counterweight is provided on the reciprocating lifting platform, the reciprocating lifting platform drives the balancing counterweight to lift and reciprocate, thereby driving the oil pumping rod to lift and reciprocate; the screw protection sleeve is rollingly connected or slidingly connected to the reciprocating screw, when the screw protection sleeve is rollingly connected to the reciprocating screw, the screw protection sleeve is provided with a ball guide; when the screw protection sleeve is slidingly connected to the reciprocating screw, the screw protection sleeve is provided with a crescent guide block, and the grease box is used to contain grease for lubricating the reciprocating screw.

[0034] In the existing technology, mechanically controlled tower pumping units use mechanical reversing, have many moving parts and are noisy over time, making maintenance very troublesome. Electrically controlled tower pumping units currently use inverters to control the forward and reverse rotation of the motor to achieve reversing. The motor is constantly reversing and starting, which not only consumes more energy, but also the stability of the reciprocating lifting platform needs to be improved.

[0035] In the present application, the motor does not need to rotate forward or reverse, and only rotates in one direction to drive the reciprocating screw to rotate in one direction. The spiral groove route design on the reciprocating screw enables the screw protection sleeve to move back and forth along the spiral groove route, solving the problem of high motor energy consumption caused by the need for an inverter to control the forward and reverse rotation of the motor in the prior art, and has better safety performance than electric reversing oil pumps.

[0036] It should be noted that the screw protection sleeve in this application can be of two types: a ball guide, which uses rolling friction, and a crescent guide block, which uses sliding friction. Furthermore, those skilled in the art can design the lead according to the form of the ball guide or crescent guide block, which can be two-line or three-line. The crescent guide block configuration is more reliable and can improve the operational stability of the device.

[0037] As a specific implementation method, a double-layer linear sliding spiral track is set on the reciprocating screw, which can enable the screw protection sleeve to achieve reciprocating motion without changing the rotation direction of the reciprocating screw main shaft, thereby improving the operating stability of the reciprocating lifting platform.

[0038] It should be noted that the spacing between the tracks on the reciprocating screw and the straight-line distance of the same track along a circle of the reciprocating screw can be set according to needs, so as to improve the lifting efficiency and ensure the lifting stability.

[0039] During the operation of the oil pumping unit, since the crescent guide block or ball guide is connected to the reciprocating screw to achieve the reversing and stable operation of the oil pumping unit, the ball guide or crescent guide block is a vulnerable part in the oil pumping unit. Therefore, it is necessary not only to ensure the lubrication of the ball guide or crescent guide block during the operation of the machine, but also to carry out regular inspection and replacement.

[0040] It should be noted that those skilled in the art can make adjustments or improvements based on the reciprocating screw solution in the prior art, including but not limited to adding a self-locking structure to improve safety, improving the track structure of the groove track or improving the slider structure that cooperates with the groove track, etc., for example, referring to the solution in Chinese patent CN203532648U for improvement, etc.

[0041] In one embodiment, the reciprocating screw is made of stainless steel or austenitic steel. To improve the safety of the reciprocating screw, corrosion-resistant austenitic steel can be used. In addition, since the crescent guide block is a wearing part, the crescent guide block can be made of a wear-resistant material and undergo regular inspection or replacement.

[0042] As an embodiment, the transmission mechanism is an umbrella-shaped gearbox, which is used to increase torque while reversing.

[0043] As an implementation method, a stabilizing auxiliary light column is further provided on the frame, and a slider that can be raised and lowered along the stabilizing auxiliary light column is provided on the reciprocating lifting platform.

[0044] As an implementation method, there are two stabilizing auxiliary light beams, which are arranged in an isosceles triangle with the reciprocating screw rod.

[0045] In one embodiment, the stabilizing auxiliary light column is connected to the slider in a sliding or rolling manner. For a sliding connection, for example, the stabilizing auxiliary light column is provided with a sliding groove along which the slider can slide. For a rolling connection, a ball bearing is provided between the slider and the stabilizing auxiliary light column to enable the slider to move along the stabilizing auxiliary light column. Those skilled in the art will recognize that the above arrangement can be implemented as needed using conventional techniques in the art, and the above example is only one implementation method; other implementation methods are also intended to fall within the scope of this application.

[0046] As an implementation method, the balancing weight block and the sucker rod are connected by a belt, and a roller is provided in the middle of the belt.

[0047] As an implementation method, an electric lead screw is also provided at the bottom of the frame for the translation of the tower pumping unit as a whole. When operating in the oil well, the lead screw can be rotated to make the pumping unit give way, which is not only safer but also more convenient to operate.

[0048] As an implementation method, the present application scheme uses a reciprocating screw to achieve reversing, relying on the reciprocating screw to convert the oil pumping unit from rotary motion to reciprocating motion. The reciprocating screw is matched with an umbrella-shaped gearbox, which meshes with the reciprocating screw through an umbrella-shaped gear. The rotation of the umbrella-shaped gear realizes the rotation of the reciprocating screw. The reciprocating screw is then connected to a reciprocating lifting platform with a crescent guide block or a ball guide block, so that the reciprocating lifting platform can rise or fall reciprocatingly along the reciprocating screw, thereby driving the belt and the balance weight block to rise or fall, thereby realizing the reciprocating lifting of the sucker rod in the oil pumping unit.

[0049] As a specific embodiment, a double-layer linear sliding spiral track is provided on the reciprocating screw, and a reciprocating ball guide is also provided. When the reciprocating lifting platform moves to the top, the reciprocating ball guide is used to realize the downward movement of the reciprocating lifting platform, and the self-locking of the balancing counterweight is also realized, thereby improving the operational safety of the entire device. When the reciprocating lifting platform moves to the bottom, the reciprocating ball guide is also used to realize the upward movement of the reciprocating lifting platform. Specifically, the track on the reciprocating screw adopts a double-track mode to improve the operational safety and stability of the reciprocating lifting platform on the reciprocating screw.

[0050] The working method of the present application scheme includes the following process: the motor is directly connected to the umbrella-shaped gearbox, the umbrella-shaped gearbox reduces speed through the umbrella-shaped gear, increases torque and reduces speed, and then transmits it to the rotating reciprocating screw. The reciprocating screw is lubricated with grease, such as molybdenum disulfide grease, and the reciprocating lifting platform is driven to rise and fall through the rotation of the reciprocating screw. Furthermore, the reciprocating lifting platform can also rely on a stable auxiliary light column to straighten and prevent the reciprocating lifting platform from reversing, thereby improving stability. The reciprocating lifting platform can drive the belt and the balance weight to rise and fall, and finally the belt drives the sucker rod to rise and fall through the roller.

[0051] When the screw protection sleeve moves to the top, the ball guide or crescent guide block fixedly connected to the reciprocating lifting platform enters the downward groove, the rotation direction of the reciprocating screw remains unchanged, and the reciprocating lifting platform moves downward again. After the ball guide or crescent guide block moves to the bottom, it enters the upward groove again, and the rotation direction of the reciprocating screw remains unchanged, thus realizing reciprocating motion.

[0052] The various embodiments in this specification are described in a progressive manner. Similar parts between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the system embodiments are generally similar to the method embodiments, so the description is relatively simple. For relevant parts, refer to the description of the method embodiments.

[0053] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A tower pumping unit, characterized in that: The machine comprises a frame and a motor, a reciprocating screw, a grease box, a screw protection sleeve, a reciprocating lifting platform, a balancing weight and a sucker rod arranged on the frame; a transmission mechanism is provided between the motor and the reciprocating screw, the unidirectional rotation of the motor drives the reciprocating screw to rotate unidirectionally, a double-layer sliding spiral track is provided on the reciprocating screw, the screw protection sleeve is provided on the reciprocating screw, the screw protection sleeve is fixedly provided on the reciprocating lifting platform, the reciprocating lifting platform reciprocates and rises and falls under the drive of the reciprocating screw, the balancing weight is provided on the reciprocating lifting platform, the reciprocating lifting platform drives the balancing weight to reciprocate and rise and fall, thereby driving the sucker rod to reciprocate and rise and fall; The screw rod protection sleeve is in rolling connection or sliding connection with the reciprocating screw rod. When the screw rod protection sleeve is in rolling connection with the reciprocating screw rod, the screw rod protection sleeve is provided with a ball guide; when the screw rod protection sleeve is in sliding connection with the reciprocating screw rod, the screw rod protection sleeve is provided with a crescent guide block, and the grease box is used to accommodate grease for lubricating the reciprocating screw rod.

2. The tower pumping unit according to claim 1, characterized in that: The transmission mechanism is an umbrella-shaped gearbox, which is used for reversing and increasing torque.

3. The tower pumping unit according to claim 1, characterized in that: The frame is further provided with a stable auxiliary light column, and the reciprocating lifting platform is provided with a sliding block which can be lifted and lowered along the stable auxiliary light column.

4. The tower pumping unit according to claim 3, characterized in that: There are two stabilizing auxiliary light beams, which are arranged in an isosceles triangle with the reciprocating screw rod.

5. The tower pumping unit according to claim 3, characterized in that: The stabilizing auxiliary light column is connected to the slider in a sliding manner or in a rolling manner.

6. The tower pumping unit according to claim 1, characterized in that: The balancing weight block and the sucker rod are connected via a belt, and a roller is provided in the middle of the belt.

7. The tower pumping unit according to claim 1, characterized in that: An electric lead screw is also provided at the bottom of the frame for translation of the tower pumping unit as a whole.

8. The tower pumping unit according to claim 7, characterized in that: The electric lead screw is a worm gear electric lead screw.

9. The tower pumping unit according to claim 1, characterized in that: The grease box is a molybdenum disulfide grease box.

10. The tower pumping unit according to claim 1, characterized in that: The reciprocating screw rod is a stainless steel reciprocating screw rod or an austenitic steel reciprocating screw rod.

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