Fine composite counterbalance beam pumping unit

Abstract

The utility model discloses a kind of fine composite balanced beam type pumping unit, including beam machine, the end of the beam machine is connected with tail beam, and the tail beam end is connected with counterweight box;The counterweight box includes box and door, screw rod is arranged inside the box, and the screw rod is threadedly connected with compression member;Balance sheet is placed in the compression member compression space in the box, and balance sheet is compacted by tightening compression member;Door is arranged on one side of the box, and the box is arranged with anti-drop piece on the side with door, to prevent balance sheet from separating.The utility model can solve the problem that the balance degree adjustment difficulty of conventional crank balanced beam machine is big, and the balance degree adjustment difficulty and workload are reduced by fine adjustment of pumping unit balance degree.

Description

Technical Field

[0001] This utility model relates to the field of petroleum development technology, specifically a precision composite balanced walking beam pumping unit. Background Technology

[0002] The walking beam pumping unit is a surface-driven device in rod-based oil production systems, widely used in oil wells where the reservoir energy is insufficient for self-flowing. The basic characteristics of the walking beam pumping unit are its simple structure, ease of manufacture, and convenient use. In particular, it can operate continuously in the field around the clock, is durable, and is currently the most widely used pumping unit.

[0003] Currently, the balance adjustment methods for walking beam pumping units mainly fall into the following categories: one is the crank-balanced walking beam pumping unit, which relies on the movement of the balance block on the crank to achieve balance adjustment; another is the walking beam-balanced walking beam pumping unit, which adds a balance block of a certain weight to the tail of the walking beam and moves the position of the balance block to achieve balance adjustment; and the third is the composite-balanced walking beam pumping unit, which uses both walking beam balancing and crank balancing on a single pumping unit. For small-scale adjustments, the walking beam balance is adjusted, but this requires working at height; for large-scale adjustments, the crank balance is adjusted.

[0004] The conventional walking beam pumping units currently in use employ crank balancing, which makes bolt removal difficult. The balance weights on the crank range from 1.25 tons to 1.75 tons, making it difficult to move the balance weights and requiring a large amount of time and effort to adjust the balance.

[0005] Walking beam balancing is suitable for small walking beam pumping units with suspension point loads below 30KN. These pumping units have poor safety performance; if the sucker rod breaks off at a shallow depth, the pumping unit is prone to overturning. This is especially problematic for medium to large-sized units, with the risk increasing as the unit size grows. Conventional walking beam pumps with automatically moving counterweights on the walking beam have higher maintenance costs and longer downtime in case of malfunctions.

[0006] In conventional beam lobe machines that automatically move counterweights on the beam for balancing, once the moving part rusts, the counterweights cannot move. The automatic control part is damaged, resulting in high repair costs and wasted time. The safety performance is also poor, and the machine is prone to overturning when the sucker rod breaks off at a shallow part.

[0007] When adjusting the balance of the walking beam in a compound balanced beam pumping unit, a crane is required, involving hoisting and working at height, and the movement of the balance weight is difficult. When adjusting the balance of the crank over a large range, the balance adjustment is difficult and time-consuming.

[0008] Publication No. CN117052351A discloses a device and method for adjusting the crank balance of a beam pumping unit, including a hydraulic starting mechanism, a lifting mechanism, and a pushing mechanism. The hydraulic starting mechanism includes a hydraulic wrench and a hydraulic station, with the hydraulic wrench and hydraulic station connected via a hydraulic hose, and the hydraulic station applying hydraulic pressure to the hydraulic wrench. The lifting mechanism includes a jack and a skid, with the skid including a high support plate and a low support plate. The high support plate is connected to the jack, and the low support plate abuts against the balance block. The jack lifts the skid to raise the balance block. The traction mechanism includes a traction component and a drive shaft seat, with one end of the drive shaft seat connected to the traction component and the other end engaged with a balance block fixing bolt. The traction component drives the balance block to move.

[0009] The existing technology requires the use of various hydraulic tools, which is cumbersome and inefficient.

[0010] Announcement No. CN221096487U discloses a remote-controlled walking beam balancing device for a pumping unit. The beam is connected to the walking beam of the pumping unit via a front connecting seat and a rear connecting seat. A drive rack is provided on the upper surface of the sub-beam. A counterweight is provided in the upper counterweight box of the sub-beam. The counterweight box is connected to the sub-beam via an inner traveling wheel system. A protective cover is provided on the upper part of the counterweight box. A wind-solar hybrid power generation device is provided on the upper part of the protective cover. The output shaft of the drive motor inside the protective cover is connected to the input shaft of the gearbox. The output shaft of the gearbox is inserted into the upper part of the counterweight box and connected to the drive gear. The drive gear meshes with the drive rack. The left side of the drive rack is aligned by a centering wheel. A battery inside the protective cover provides power to the drive motor. The wind-solar hybrid power generation device supplies power to the battery through a controller. The remote control controls the receiver to control the forward and reverse rotation of the motor.

[0011] When this existing technology malfunctions, it takes a long time to repair and the repair costs are high.

[0012] Announcement No. CN112112605B discloses an energy-saving intelligent walking beam pumping unit, including a base. A support mechanism is fixedly connected to one side of the top of the base, and a walking beam is rotatably connected to the top of the support mechanism. One end of the walking beam is fixedly connected to a donkey head, and the other end of the walking beam is a fixed seat equipped with a counterweight mechanism. A limit rotating seat drive mechanism is fixedly connected to the base and is disposed between the limit rotating seat and the walking beam. A walking balance mechanism is provided on the top of the walking beam. A buffer and shock absorption component is installed on the base.

[0013] The existing technology requires overcoming the weight of all counterweights when tightening the nut, making it difficult to install. Furthermore, the pressure exerted on the locking nut during movement is too great, posing a high risk of use.

[0014] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0015] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, this utility model provides a fine composite balanced walking beam pumping unit.

[0016] To achieve the above objectives, the present invention adopts the following technical solution:

[0017] A precision composite balanced walking beam pumping unit includes a walking beam, the end of which is connected to a tail beam, and the end of the tail beam is connected to a counterweight box. The counterweight box includes a box body and a door. A screw is installed inside the box body, and the screw is threadedly connected to a clamping component. A balance plate is placed inside the box body in the clamping space of the clamping component, and the balance plate is compacted by tightening the clamping component. A door is provided on one side of the box body, and an anti-detachment component is provided on the side of the box body where the door is located to prevent the balance plate from detaching.

[0018] Furthermore, the clamping component is a threaded crossbar, the screw is threadedly connected to the center of the threaded crossbar, and a clamping post is provided at the upper center of the threaded crossbar.

[0019] Furthermore, the box body is a rectangular frame or plate structure;

[0020] When the box is closest to the ground, the bottom plate of the box is parallel to the ground;

[0021] A screw is installed between the center of the top plate and the bottom plate of the box, and the balance plate is laid flat on the bottom plate on both sides of the screw inside the box.

[0022] Furthermore, the box doors are horizontally split and located on the side of the counterweight box facing away from the traveling beam machine. One side of each box door is connected to the left and right plates of the counterweight box via hinges, and the two boxes doors are connected by a lock.

[0023] Furthermore, the anti-detachment component includes a hanging ring and a safety pin. The upper and lower plates of the counterweight box are provided with hanging rings at the ends near the box door, and the safety pin can pass through the hanging rings.

[0024] At least one anti-detachment component is provided between the screw and the left plate, and between the screw and the right plate, and the balance plate is placed between the screw and the left plate, and between the screw and the right plate.

[0025] Furthermore, the end of the walking beam of the traveling beam is welded to the tail beam, and the joint is connected to the tail beam by a locking pin.

[0026] Furthermore, the balance plate is a balance iron plate weighing 10-15 kg.

[0027] Furthermore, the minimum distance between the counterweight box and the ground is 1.8-2.7 meters.

[0028] Compared with the prior art, the present invention has the following advantages:

[0029] This invention solves the problem of difficult balance adjustment in conventional crank-balanced walking beam pumps. By finely adjusting the balance of the pumping unit, it reduces the difficulty and workload of balance adjustment, shortens the adjustment time, eliminates the need for cranes and hydraulic tools, eliminates the safety risks of lifting and hoisting and working at height, reduces the likelihood of malfunctions, and comprehensively improves the operational safety level of walking beam pumping units, resulting in good economic and social benefits. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of a precision composite balanced walking beam pumping unit according to this utility model.

[0031] Figure 2 This is a structural schematic diagram of the counterweight box in this utility model.

[0032] Figure 3 This is a schematic diagram of the structure of the counterweight box with the balance iron plate installed in this utility model.

[0033] Figure 4 This is a schematic diagram of the tail beam structure in this utility model.

[0034] Figure 5 This is a schematic diagram of the locking pin structure in this utility model.

[0035] In the diagram: 1. Walking beam; 2. Tail beam; 3. Joint; 4. Screw rod; 5. Screw hole crossbar; 6. Balance iron plate; 7. Counterweight box; 7. Box body; 72. Box door; 8. Hanging ring; 9. Safety pin; 10. Locking pin. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] Example 1:

[0038] Please see Figures 1 to 5This utility model provides a precision composite balanced walking beam pumping unit, including a walking beam 1, with a tail beam 2 connected to the end of the walking beam 1, and a counterweight box 7 connected to the end of the tail beam 2. The tail beam 2 extends downwards to allow the counterweight box 7 to be manually operated from the ground. The counterweight box 7 includes a box body 71 and a box door 72. A screw 4 is installed inside the box body 71, and the screw 4 is threadedly connected to a clamping member for applying pressure. A balance iron plate 6 is placed inside the box body 71 in the clamping space of the clamping member. The balance iron plate 6 is compacted by tightening the clamping member. A box door 72 is provided on one side of the box body 71, and an anti-detachment member is provided on the side of the box body 71 where the box door 72 is located to prevent the balance iron plate 6 from detaching.

[0039] Specifically, the clamping component is a threaded crossbar 5, the screw 4 is threadedly connected to the center of the threaded crossbar 5, a hexagonal support post is provided at the upper center of the threaded crossbar 5, and the balance iron plate 6 is placed on both sides of the screw 4. When installing the balance iron plate 6, the threaded crossbar 5 is screwed to the state where it coincides with the gap of the balance iron plates 6 on both sides. When fixing the balance iron plate 6, the threaded crossbar 5 is screwed to the state where it is perpendicular to the gap of the balance iron plates 6 on both sides.

[0040] Specifically, a connector 3 is welded to the end of the walking beam of the traveling beam 1 to connect to the tail beam 2. The connector 3 and the tail beam 2 are connected by a locking pin 10. The locking pin 10 consists of a round handle and a locking post with a radial locking hole. The end of the tail beam 2 is provided with a connection hole corresponding to the connector 3. The connection is achieved by inserting the locking pin 10 after aligning the connection hole with the opening of the connector 3. The end of the tail beam 2 is welded to the top of the counterweight box 7. If there is no counterweight iron obstructing the end of the walking beam, several holes can be opened directly at the end of the walking beam, without the need for the connector 3.

[0041] Specifically, the box 71 is a rectangular body, constructed with a welded steel frame and an outer steel plate. A screw 4 is installed between the center of the top and bottom plates of the box 71 via an interference fit and a nut. The screw 4 is interference-fitted with a hole on the bottom plate and extends out of the top plate, where it is locked by a nut. When the box 71 is closest to the ground, the bottom plate of the box 71 is parallel to the ground, which is perpendicular to gravity. The balance iron plates 6 are laid flat on the bottom plates on both sides of the screw 4 inside the box. Weight adjustment is achieved by adjusting the number of balance iron plates 6. The balance iron plates 6 are pressed firmly by tightening the threaded caps and pressure plates 5 to prevent them from moving during operation.

[0042] Specifically, the box doors 72 are horizontally split and located on the side of the counterweight box 7 facing away from the walking beam machine 1. One side of each box door 72 is connected to the left and right plates of the counterweight box 7 by hinges, and the two box doors 72 are connected by padlocks.

[0043] Specifically, the anti-detachment component includes a hanging ring 8 and a safety pin 9. The upper and lower plates of the counterweight box 7 are provided with a hanging ring 8 at one end near the box door 72. The anti-detachment component is provided between the screw 4 and the left plate and between the screw 4 and the right plate. The balance iron plate 6 is placed between the screw 4 and the left plate and between the screw 4 and the right plate. After the balance iron plate 6 is added or subtracted, the safety pin 9 is passed through the hanging ring 8 for safety protection of the balance iron plate 6 during the operation of the pumping unit.

[0044] Preferably, the hanging ring 8 of the upper plate is a through-hole ring, and the hanging ring 8 of the lower plate is a blind-hole ring. A threaded head is provided at the upper end of the safety pin 9, and a nut is used to lock the safety pin 9 to the through-hole ring.

[0045] Example 2:

[0046] Based on Example 1, this example provides a balancing procedure for a fine composite balanced beam pumping unit:

[0047] Before the walking beam pump is installed in the well, the range of variation of the sucker rod and produced fluid is calculated based on the geological conditions and well parameters. The maximum and minimum values ​​of the pumping unit load variation are obtained. After compromise, the torque generated when the tail beam 2 and half of the counterweight box 7 are used is subtracted. Then, the balance block is installed at the corresponding position of the walking beam pump crank. After the pumping unit is installed in the well, it is then installed.

[0048] In this invention, a tail beam 2 is added to the tail of the walking beam of the crank-balanced walking beam machine 1, so that the walking beam and the tail beam 2 are extended to allow for manual ground operation. Then, a counterweight box 7 is welded to the end of the tail beam 2.

[0049] After adjusting the operating parameters of the pumping unit, recalculate the suspension point load, stop the pumping unit crank at the bottom dead center position, and erect a ladder or platform approximately 0.6 to 1 meter high on the concrete foundation of the pumping unit. One person climbs the ladder or platform, opens the door 72 of the counterweight box 7, removes the safety pin 9, and loosens the bolted crossbar 5 until it is perpendicular to the door of the box 71. Another person on the ground assists by adding or removing balance iron plates 6, each weighing approximately 10-15 kg, according to the calculation results, with a maximum addition or subtraction of 20 plates. After adjustment, tighten the bolted crossbar 5 until it is parallel to the door of the box 72, insert the safety pin 9, close and lock the door 72, and remove the ladder or platform. This process takes no more than 10 minutes, is safe, simple, and quick, and does not require climbing or using a crane.

[0050] For type 12 and smaller walking beam pumps with a stroke of 4.8 meters or less, the minimum distance between the counterweight box and the concrete foundation of the pumping unit should be 1.8-2.2 meters to avoid affecting the operation of personnel on the concrete foundation. Ladders or platforms about 0.6 to 1 meter high should be erected on the concrete foundation of the pumping unit.

[0051] For the Type 14 and above beam pumps with a stroke greater than 4.8 meters, the lowest distance between the counterweight box and the ground is about 2.3-2.7 meters, which does not affect the operation of personnel on the concrete foundation. Ladders or platforms about 1 meter high are erected on the concrete foundation of the pumping unit.

[0052] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0053] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0055] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A precision composite balanced beam pumping unit, comprising a beam pump, characterized in that, The end of the traveling beam is connected to a tail beam, and the end of the tail beam is connected to a counterweight box; The counterweight box includes a box body and a box door. A screw is installed inside the box body, and the screw is threadedly connected to a clamping component. A balance plate is placed inside the box body in the clamping space of the clamping component, and the balance plate is compacted by tightening the clamping component. A box door is provided on one side of the box body, and an anti-detachment component is provided on the side of the box body where the box door is located to prevent the balance plate from detaching.

2. The precision composite balanced beam pumping unit according to claim 1, characterized in that, The clamping component is a threaded crossbar, and the screw is threaded to the center of the threaded crossbar. A clamping post is provided at the upper center of the threaded crossbar.

3. The precision composite balanced beam pumping unit according to claim 1, characterized in that, The box body is a rectangular frame and plate structure; When the box is closest to the ground, the bottom plate of the box is parallel to the ground; A screw is installed between the center of the top plate and the bottom plate of the box, and the balance plate is laid flat on the bottom plate on both sides of the screw inside the box.

4. A precision composite balanced beam pumping unit according to claim 3, characterized in that, The box doors open horizontally on the side of the counterweight box facing away from the walking beam machine. One side of each box door is connected to the left and right plates of the counterweight box via hinges, and the two boxes doors are connected by a lock.

5. A precision composite balanced beam pumping unit according to claim 3, characterized in that, The anti-detachment component includes a hanging ring and a safety pin. The upper and lower plates of the counterweight box are provided with hanging rings at the end near the box door, and the safety pin can pass through the hanging rings. At least one anti-detachment component is provided between the screw and the left plate, and between the screw and the right plate, and the balance plate is placed between the screw and the left plate, and between the screw and the right plate.

6. A precision composite balanced beam pumping unit according to claim 1, characterized in that, The walking beam of the traveling beam is connected to the tail beam by a welded joint at the end of the walking beam, and the joint and the tail beam are connected by a locking pin.

7. A precision composite balanced beam pumping unit according to claim 1, characterized in that, The balance plate is a balance iron plate weighing 10-15 kg.

8. A precision composite balanced beam pumping unit according to claim 1, characterized in that, The minimum distance between the counterweight box and the ground is 1.8-2.7 meters.

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