A sucker rod string adjusting device and method

Abstract

The present invention discloses a rod string adjusting device and method for a pumping unit. The device includes a force applying mechanism, a fixing mechanism, and a transmission mechanism. The upper end of the transmission mechanism is connected to a suspension rope device, and the transmission mechanism is in transmission connection with the force applying mechanism. The fixing mechanism fixes the polished rod. The force applying mechanism drives the fixing mechanism to rise. The present invention is convenient to install, uses the existing suspension rope device and polished rod as load-bearing points, and the flexible pull rope is convenient to connect, which can meet the height requirements of different suspension rope devices. The worm is used to drive the worm wheel nut to rotate, which saves time and effort. The present invention simplifies the operation procedure and avoids the probability of injury to conventional operators. The present invention has a simple structure and can realize the rapid and stable adjustment of the rod string of the pumping unit without removing the square clamp of the suspension rope device, and has a very wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of oil production during oilfield development, and specifically to a rod string adjusting device and method for a pumping unit. Background Art

[0002] The main oil production method in oilfield mechanical oil production is rod pumping, and the vast majority of surface oil production equipment is pumping units. The pumping units mainly include beam pumping units and beamless pumping units. Appropriate models are selected according to the liquid supply capacity of the oil well, energy conservation and consumption reduction, and regional layout.

[0003] With the continuous change of the liquid supply capacity of the oil well, the degree of eccentric wear in the wellbore, and downhole faults and collisions, it is necessary to regularly adjust the length of the rod string of the pumping unit. The commonly used method is to stop the machine at an appropriate position, tighten the unloading clamp at the polished rod at the wellhead, then start pumping and unload, apply the brake and install the brake protection device, and transfer the load to the wellhead. Remove the square clamp above the suspension device, move the square clamp up or down, tighten and fix it, open the brake protection device, slowly release the brake, wait for the suspension device to move to the square clamp, transfer the load to the suspension device, tighten the brake, and install the brake protection device. Remove the unloading clamp at the wellhead, file the burrs on the polished rod, then open the brake protection device, release the brake, and start the pumping unit using inertia. This operation procedure is cumbersome, has high requirements for the quality of operators. If not careful, it will easily cause injuries to the operator's fingers, the tooth block will pop out and hurt the operator's face or even eyes, bringing many harms to the operator. At the same time, the conventional operation takes a long time. When the brake is not sensitive, it is easy to damage the load sensor above the suspension device, causing damage to the instrument and inability to collect data.

[0004] Therefore, designing a rod string adjusting device and method for a pumping unit with a simplified operation procedure, a high safety factor, convenient installation and adjustment, and time and labor saving has become an urgent problem to be solved by those skilled in the art.

[0005] Publication (Announcement) Number: CN111794717A, Publication (Announcement) Date: October 20, 2020. It discloses an energy-saving and environmental protection adjustable pumping unit, including a lever support and a pumping motor. A support seat is arranged between the lever support and the pumping motor. A tension lever is rotatably installed at the top of the lever support, and a reducer is installed on the support seat. The length of the sucker rod can be adjusted according to the pumping depth, avoiding the ineffective pumping stroke of the sucker rod, and improving the single pumping efficiency of the entire pumping unit. The reducer is effectively cooled during operation to prevent the internal bearings of the reducer on the pumping unit from being damaged at high temperature during long-term operation, reducing the service life and the use efficiency. Through the design of three guiding belts, the spacing of the three guiding belts can be adjusted according to the different inner diameters of the oil well when the sucker rod is pumping, so as to meet the guiding of the guiding belts contacting the inner wall of the oil well when the sucker rod is pumping, and prevent the situation of ineffective stroke caused by the deviation of the sucker rod.

[0006] Publication (Announcement) Number: CN2929152Y, Publication (Announcement) Date: August 1, 2007. Disclosed is a regulator for the polished rod of a pumping unit. Its outer shape is a cylinder with an axial central through-hole in the center. The cylinder has a notch along the axial direction, and the width of the notch is the same as the diameter of the central hole. It is composed of upper, middle, and lower regulators. The bottom of the upper regulator is an inner step, and the top is a flat surface; the bottom of the middle regulator is an inner step, and the top is an outer step; the bottom of the lower regulator is a flat surface, and the top is an outer step. The inner step at the bottom of the upper regulator can cooperate with the outer step at the top of the middle regulator, and the inner step at the bottom of the middle regulator can cooperate with the outer step at the top of the lower regulator. Placing the present utility model between the polished rod clamp and the suspension rope device, the height of the polished rod clamp can be adjusted by increasing or decreasing the number of regulators. It changes the conventional operation method of adjusting the polished rod clamp. By adjusting the height of the polished rod clamp, compared with the conventional adjustment operation method, it saves time, has reliable safety performance, is easy to operate, and has a simple structure.

[0007] Publication (Announcement) Number: CN106014321B, Publication (Announcement) Date: March 1, 2019. It relates to a telescopic polished rod sealing device for a pumping well, which is composed of a square clamp, a polished rod sealing assembly, an upper pressure joint assembly, a telescopic cylinder, and a lower pressure joint assembly. Among them, the lower end of the telescopic cylinder is connected to the wellhead device through the lower pressure joint assembly, and the upper end is connected to the polished rod through the upper pressure joint assembly. The top of the upper pressure joint assembly is provided with a polished rod sealing assembly and a square clamp. Using this sealed telescopic cylinder, the high-efficiency sealing effect of the wellhead is realized. It can withstand a maximum pressure of 4 MPa. There is no contact friction between the telescopic cylinder and the polished rod, and no wear occurs, ensuring long-term working performance. At the same time, it can effectively prevent wellhead pollution, achieving the purpose of no need for manual adjustment and maintenance, and has the advantages of good sealing effect, simple preparation, convenient use, safe and reliable, and low comprehensive cost.

[0008] Publication (Announcement) Number: CN106930708B, Publication (Announcement) Date: January 7, 2020. A polished rod lifting and hanging device is provided. The polished rod lifting and hanging device includes a force-applying member and a connecting rod. Among them, the force-applying member is used to provide an upward pulling force, and the connecting rod is fixedly connected to the force-applying member. The lower end of the connecting rod is a connecting end, and the connecting end is used to connect to the upper end of the polished rod. When in use, connect the connecting end at the lower end of the connecting rod to the polished rod, and use the force-applying member to lift upward to achieve the lifting of the polished rod.

[0009] In short, the technical solutions, the technical problems to be solved, and the beneficial effects of the above-disclosed technologies are all different from those of the present invention. Regarding more technical features, the technical problems to be solved, and the beneficial effects of the present invention, there is no technical inspiration in the above-disclosed technical documents. Summary of the Invention

[0010] In view of the above-mentioned defects existing in the prior art, the object of the present invention is to provide a rod string adjusting device and method for a pumping unit. By freely connecting the suspension clamp and the lifting block with a flexible pull rope, driving the worm gear nut to rotate through the worm, pushing the fixed clamp to move the sucker rod string, and extracting or adding adjusting blocks to increase or decrease the thickness change, it is possible to achieve rapid and stable adjustment of the sucker rod string without removing the square clamp of the suspension clamp. That is, it simplifies the operation procedure, saves the shut-in time of the oil well, improves the oil production rate, and achieves the purpose of safe operation.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A rod string adjusting device for a pumping unit, comprising a force application mechanism and a fixing mechanism;

[0013] It further includes a transmission mechanism;

[0014] The upper end of the transmission mechanism is connected to the suspension clamp, and the transmission mechanism is in transmission connection with the force application mechanism;

[0015] The fixing mechanism fixes the polished rod;

[0016] The force application mechanism drives the fixing mechanism to rise.

[0017] Further, the transmission mechanism includes a pull rod, which is a T-shaped structure composed of a horizontal sleeve and a vertical screw rod. The vertical screw rod of the pull rod is in transmission connection with the force application mechanism, and the horizontal sleeve of the pull rod is connected to the suspension clamp through a flexible pull rope.

[0018] Further, the lower end of the flexible pull rope is designed as a ring shape and is hinged to the horizontal sleeve of the pull rod through a pull rod shaft.

[0019] Further, a suspension block is arranged on the upper surface of the suspension clamp, and an arc-shaped groove is opened on the upper surface of the suspension block. The flexible pull rope is suspended in the arc-shaped groove.

[0020] Further, a convex edge for positioning is arranged on the bottom surface of the suspension block, and a magnetic steel sheet is installed on the suspension block.

[0021] Further, the fixing mechanism includes a fixed clamp, which clamps the polished rod.

[0022] Further, the force application mechanism includes a lifting block, a worm gear nut, and a worm;

[0023] The lifting block is provided with a polished rod through hole and a vertical screw rod through hole, and a stepped enlarged hole is opened in the upper half of the polished rod through hole. The stepped enlarged hole axially limits the lower end of the fixed clamp;

[0024] A flat bearing is installed at the bottom end of the vertical screw rod through hole of the lifting block;

[0025] The internal thread of the worm nut meshes and assembles with the vertical screw rod, and the outer wall of the worm nut is provided with helical teeth that mesh and assemble with the worm; a flat bearing is connected to the upper end of the worm nut.

[0026] The worm is fixed on the fixed frame, and the upper end of the fixed frame is fixedly connected to the lifting block.

[0027] Furthermore, a polished rod guiding hole is also provided on the fixed frame.

[0028] Furthermore, the power input end of the worm gear is connected to a hand crank wheel or an electric drill.

[0029] Furthermore, an adjusting block is also included, and the adjusting block is padded between the suspension hanger and the load sensor.

[0030] Furthermore, the adjusting block is provided with a U-shaped bayonet, the U-shaped bayonet is used to make way for the polished rod, and a baffle and a baffle bolt are provided on the U-shaped bayonet.

[0031] In order to achieve the above object, the present invention adopts the following technical solutions:

[0032] A using method of a rod string adjusting device for a pumping unit, comprising the following steps:

[0033] The step of lifting the rod string of the pumping unit:

[0034] Drive the worm to rotate, drive the worm nut to rotate, and thus push the lifting block to move; the lifting block moves upward to push the fixed clamp so as to drive the entire sucker rod string to move upward. Place the adjusting block under the load sensor and insert the bolt to lock the adjusting block and the baffle, or loosen the square clamp on the suspension hanger, and then move downward to the length of the rod string to be adjusted, and fix the square clamp above the suspension hanger, thereby realizing the rapid lifting of the rod string of the pumping unit.

[0035] The step of lowering the rod string of the pumping unit:

[0036] Unlock the adjusting block and the baffle, pull out the adjusting block under the load sensor, or loosen the square clamp on the suspension hanger, and then move upward to the length of the rod string to be adjusted, and fix the square clamp above the suspension hanger; drive the worm to rotate, drive the worm nut to rotate, and thus push the lifting block to move; the lifting block moves downward, and the fixed clamp and the polished rod move downward by their own weight, thereby realizing the rapid lowering of the rod string of the pumping unit.

[0037] The present invention has the following beneficial effects compared with the prior art:

[0038] 1. The present invention is convenient to install. By using the existing suspension hanger and polished rod as the bearing points, the flexible pull rope is convenient to connect and can be adapted to different suspension hanger heights.

[0039] 2. The present invention uses the worm to drive the worm nut to rotate, which saves time and effort.

[0040] 3. The present invention simplifies the operation procedure and avoids the injury probability of conventional operators.

[0041] 4. The structure of the present invention is simple. Without removing the square clamp of the suspension device, the rapid and stable adjustment of the pumping unit rod string can be realized, and it has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic structural view of an adjusting device for the rod string of a pumping unit according to the present invention;

[0043] Figure 2 is Figure 1 the left view of

[0044] Figure 3 is the front view of the suspension block in the present invention;

[0045] Figure 4 is the left view of the suspension block in the present invention;

[0046] Figure 5 is the front view of the pull rod in the present invention;

[0047] Figure 6 is the left view of the pull rod in the present invention;

[0048] Figure 7 is the front view of the adjusting block in the present invention;

[0049] Figure 8 is the top view of the adjusting block in the present invention;

[0050] Figure 9 is the front view of the worm and worm gear connection in the present invention;

[0051] Figure 10 is the top view of the worm and worm gear connection in the present invention..

[0052] In the figure: 1. Square clamp; 2. Load sensor; 3. Adjusting block; 4. Flexible pull rope; 5. Suspension block; 6. Suspension device; 7. Pull rod shaft; 8. Pull rod; 9. Fixed clamp; 10. Baffle; 11. Lifting block; 12. Plain bearing; 13. Fixed frame; 14. Worm gear nut; 15. Worm; 16. Crank handle wheel; 17. Connecting fixing cap; 18. Electric drill; 19. Polished rod; 20. Convex edge; 21. Arc-shaped groove; 22. Magnetic steel sheet. DETAILED DESCRIPTION OF THE INVENTION

[0053] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] Embodiment 1:

[0055] Please refer to Figures 1 to 10 , the present invention provides a technical solution:

[0056] A rod string adjusting device for a pumping unit, including a force applying mechanism and a fixing mechanism;

[0057] It further includes a transmission mechanism;

[0058] The upper end of the transmission mechanism is connected to the suspension rope device, and the transmission mechanism is in transmission connection with the force applying mechanism;

[0059] The fixing mechanism fixes the polished rod;

[0060] The force applying mechanism drives the fixing mechanism to rise.

[0061] Further, the transmission mechanism includes a pull rod 8, which is a T-shaped structure composed of a horizontal sleeve and a vertical screw rod. The vertical screw rod of the pull rod is in transmission connection with the force applying mechanism, and the horizontal sleeve of the pull rod is connected to the suspension rope device 6 through a flexible pull rope 4.

[0062] Further, the lower end of the flexible pull rope is designed as a ring shape and is hinged to the horizontal sleeve of the pull rod through a pull rod shaft.

[0063] Further, a suspension block 5 is provided on the upper surface of the suspension rope device, and an arc-shaped groove is opened on the upper surface of the suspension block. The flexible pull rope is suspended in the arc-shaped groove.

[0064] Further, a convex edge 20 for positioning is provided on the bottom surface of the suspension block, and a magnetic steel sheet 22 is installed on the suspension block.

[0065] Further, the fixing mechanism includes a fixing clamp, and the fixing clamp clamps the polished rod.

[0066] Further, the force applying mechanism includes a lifting block 11, a worm gear nut 14, and a worm 15;

[0067] The lifting block is provided with a polished rod through hole and a vertical screw rod through hole, and a stepped enlarged hole is opened in the upper half of the polished rod through hole. The stepped enlarged hole axially limits the lower end of the fixing clamp;

[0068] A flat bearing is installed at the bottom end of the vertical screw rod through hole of the lifting block;

[0069] The internal thread of the worm nut meshes and assembles with the vertical screw rod, and the outer wall of the worm nut is provided with spiral teeth that mesh and assemble with the worm; a flat bearing is connected to the upper end of the worm nut.

[0070] The worm is fixed on the fixed frame, and the upper end of the fixed frame is fixedly connected to the lifting block.

[0071] Furthermore, a polished rod guiding hole is also provided on the fixed frame.

[0072] Furthermore, the power input end of the worm gear is connected to a hand crank wheel 16 or an electric drill 18.

[0073] Furthermore, an adjusting block 3 is also included, and the adjusting block is padded between the suspension device and the load sensor.

[0074] Furthermore, the adjusting block is provided with a U-shaped bayonet, the U-shaped bayonet is used to make way for the polished rod, and a baffle 10 and a baffle pin are provided on the U-shaped bayonet.

[0075] However, for force balance, in specific implementation, components need to be symmetrically arranged. For example, two sets of flexible pull ropes 4, suspension blocks 5, pull rods 8, flat bearings 12, worm nuts 14, and worms 15 are arranged on the left and right and symmetrically. A square clip 1 is provided above the suspension device 6. There are two suspension blocks 5, which are respectively fixed on the upper plane of the suspension device 6 and on both sides of the load sensor 2, and two magnetic steel sheets 22 are provided at the bottom of the suspension block 5. An arc-shaped groove 21 is provided at the top of the suspension block 5, and a convex edge 20 is provided on one side of its bottom and is clamped on one side of the suspension device 6. The flexible pull rope 4 is a rope-like structure, and its rope end is annular and is used to pass through the pull rod shaft 7. One end of the pull rod shaft 7 is protrudingly designed. The flexible pull rope 4 is hung on the concave arc surface of the pull rod shaft 7 and is equipped with a gasket. The pull rod 8 is of a T-shaped design, and its upper end is horizontally of a sleeve design for the pull rod shaft 7 to pass through and transmit the load. The pull rod shaft 7 is fixedly connected to the pull rod 8 through a shaft pin. Connecting holes are provided on both sides of the lifting block 11, and the connecting holes on both sides of the lifting block 11 are symmetrically arranged. Threads are engraved on the lower rod body of the pull rod 8, and the pull rod 8 passes through the connecting holes on both sides of the lifting block 11. A fixing groove or a stepped enlarged hole is provided in the middle of the lifting block 11. The polished rod 19 is located at the middle internal position of the lifting block 11. Counterbore grooves are provided below the connecting holes on both sides of the lifting block 11. The lower threaded section of the pull rod 8 is threadedly connected to the worm nut 14. The upper end surface of the worm nut 14 is in close contact with the flat bearing 12. The two worm nuts 14 on both sides match the worm 15 and are installed on both sides of the fixed frame 13. One end of the worm 15 is of a square design and is provided with a hand crank wheel 16 or an electric drill 18. A connecting fixing cap 17 is fixedly connected to the rotating head of the electric drill 18. A fixing clip 9 is installed on the lifting block 11, and a polished rod 19 is fixedly connected to the fixing clip 9. When the lifting block 11 is lifted, it can push the fixing clip 9 to drive the entire sucker rod string to move upward, thereby realizing rapid adjustment. The middle part of the fixed frame 13 is sleeved on the polished rod 19 to play a role in straightening and fixing.

[0076] A method for using a rod string adjusting device of a pumping unit, comprising the following steps:

[0077] S1: When lifting the rod string of the pumping unit, stop the pumping unit at a suitable position according to the shutdown operating procedures, apply the brake and cut off the power. Since there is a magnetic steel sheet 22 at the bottom of the suspension block 5, it is firmly placed on the upper plane of the suspension clamp 6 and on both sides of the load sensor 2. The flexible pull rope 4 passes through the suspension block 5 and is placed in the top arc-shaped groove 21. The end of the flexible pull rope 4 is annular. The pull rod shaft 7 passes through one annular end, the pull rod 8 and the other annular ring, and is equipped with gaskets. The pull rod 8 is fixedly connected to the pull rod shaft 7 through a pin;

[0078] S2: The pull rod 8 passes through the connection holes on both sides of the lifting block 11. Place the polished rod 19 in the middle internal position of the lifting block 11, tighten the fixing clamp 9. Place the plain bearings 12 below the connection holes on both sides of the lifting block 11. The threaded section at the lower end of the pull rod 8 is connected to the worm gear nut 14. After the worm gear nut 14 is screwed onto the thread of the pull rod 8, its upper end surface is closely attached to the plain bearing 12, and the threaded section is the adjusting distance of the rod string;

[0079] S3: The two worm gear nuts 14 are matched with the worm 15 and installed on both sides of the fixing frame 13. The middle part of the fixing frame 13 is sleeved on the polished rod 19 to play a role of straightening and fixing;

[0080] S4: After installing the fixing clamp 9 on the lifting block 11, the hand crank wheel 16 or the electric wrench socket can be installed and sleeved on the hand wheel to fix the worm gear nut 14, drive the worm 15 to rotate, drive the worm gear nut 14 to rotate, and thus push the lifting block 11 to move;

[0081] S5: The lifting block 11 is lifted to push the fixing clamp 9 so as to drive the entire sucker rod string to move up a certain height. Place 3 - 5 U-shaped adjusting blocks 3 with a single thickness of 15 mm under the load sensor 2, and insert the pin 23 to lock the adjusting block 3 and the baffle 10, or loosen the square clamp 1 on the suspension clamp 6, and then move down to the length of the rod string to be adjusted, and fix the square clamp 1 above the suspension clamp 6, so as to realize the rapid lifting of the rod string of the pumping unit;

[0082] S6: When lowering the rod string of the pumping unit, after repeating steps S1 - S4, unlock the adjusting block 3 and the baffle 10, pull out a certain thickness of the U-shaped adjusting block 3 under the load sensor 2, or loosen the square clamp 1 on the suspension clamp 6, and then move up to the length of the rod string to be adjusted, and fix the square clamp 1 above the suspension clamp 6, so as to realize the rapid lowering of the rod string of the pumping unit.

[0083] The present invention is convenient to install. By using the existing hanger and polished rod as the bearing points, the flexible pull rope is easy to connect and can adapt to the height requirements of different hangers. The worm is used to drive the worm nut to rotate, which saves time and effort. The present invention simplifies the operation procedure and avoids the probability of injury to conventional operators. The present invention has a simple structure and can realize the rapid and stable adjustment of the pumping unit rod string without removing the square clamp of the hanger, and has a very wide application prospect.

[0084] Embodiment 2:

[0085] Please refer to Figures 1 to 10 , the present invention provides a technical solution:

[0086] A device for adjusting the rod string of a pumping unit, comprising a force application mechanism and a fixing mechanism;

[0087] It further includes a transmission mechanism;

[0088] The upper end of the transmission mechanism is connected to the hanger, and the transmission mechanism is in transmission connection with the force application mechanism;

[0089] The fixing mechanism fixes the polished rod;

[0090] The force application mechanism drives the fixing mechanism to rise.

[0091] Further, the transmission mechanism includes a pull rod, which is a T-shaped structure composed of a horizontal sleeve and a vertical screw rod. The vertical screw rod of the pull rod is in transmission connection with the force application mechanism, and the horizontal sleeve of the pull rod is connected to the hanger through a flexible pull rope.

[0092] Further, the lower end of the flexible pull rope is designed as a ring and is hinged to the horizontal sleeve of the pull rod through a pull rod shaft.

[0093] Further, a hanging block is arranged on the upper surface of the hanger, and an arc-shaped groove is opened on the upper surface of the hanging block. The flexible pull rope is suspended in the arc-shaped groove.

[0094] Further, a convex edge for positioning is arranged on the bottom surface of the hanging block, and a magnetic steel sheet is installed on the hanging block.

[0095] Further, the fixing mechanism includes a fixing clamp, and the fixing clamp clamps the polished rod.

[0096] Embodiment 3:

[0097] Please refer to Figures 1 to 10 , the present invention provides a technical solution:

[0098] A device for adjusting the rod string of a pumping unit, comprising a force application mechanism and a fixing mechanism;

[0099] It further includes a transmission mechanism;

[0100] The upper end of the transmission mechanism is connected to the hanger, and the transmission mechanism is in transmission connection with the force application mechanism;

[0101] The fixing mechanism fixes the polished rod;

[0102] The force application mechanism drives the fixing mechanism to rise.

[0103] Furthermore, the transmission mechanism includes a pull rod, which is a T-shaped structure composed of a horizontal sleeve and a vertical screw rod. The vertical screw rod of the pull rod is in transmission connection with the force application mechanism, and the horizontal sleeve of the pull rod is connected to the hanger through a flexible pull rope.

[0104] Although all the above embodiments use Figures 1 to 10 , but as those skilled in the art can clearly know, it is not necessary to give a separate drawing to show. As long as the missing components or structural features in the embodiments are removed from the drawings. This is clear to those skilled in the art. Of course, the embodiment with more components is just the optimal embodiment, and the embodiment with fewer components is the basic embodiment, but it can also achieve the basic purpose of the present invention. Therefore, all these variant embodiments are within the protection scope of the present invention.

[0105] In this application, the components themselves that are not elaborated and the connection methods of the various components in this application all belong to the well-known technologies in the technical field and will not be elaborated further. Such as welding, threaded connection, etc.

[0106] In the present invention, the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0107] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention.

[0108] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0109] The foregoing are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A rod string adjusting device for a pumping unit, comprising a force applying mechanism and a fixing mechanism; Characterized in that, It further includes a transmission mechanism and an adjusting block; The upper end of the transmission mechanism is connected to the suspension rope device, and the transmission mechanism is in transmission connection with the force applying mechanism; the adjusting block is placed between the suspension rope device and the load sensor; a square clamp is arranged above the suspension rope device; The fixing mechanism fixes the polished rod; the polished rod is located at the middle inner position of the lifting block; The force applying mechanism drives the fixing mechanism to rise; The transmission mechanism includes a pull rod, and the pull rod has a T-shaped structure composed of a horizontal sleeve and a vertical screw rod. The vertical screw rod of the pull rod is in transmission connection with the force applying mechanism, and the horizontal sleeve of the pull rod is connected to the suspension rope device through a flexible pull rope; The lower end of the flexible pull rope is designed as a ring and is hinged to the horizontal sleeve of the pull rod through a pull rod shaft; A suspension block is arranged on the upper surface of the suspension rope device, and an arc-shaped groove is opened on the upper surface of the suspension block. The flexible pull rope is suspended in the arc-shaped groove; A convex edge for positioning is arranged on the bottom surface of the suspension block, and a magnetic steel sheet is installed on the suspension block at the same time; The force applying mechanism includes a lifting block, a worm wheel nut, and a worm; The lifting block is provided with a polished rod through hole and a vertical screw rod through hole; A flat bearing is installed at the bottom end of the vertical screw rod through hole of the lifting block; The internal thread of the worm wheel nut is meshed and assembled with the vertical screw rod, and the outer wall of the worm wheel nut is provided with spiral teeth and meshed and assembled with the worm; the upper end of the worm wheel nut is connected to the flat bearing; The worm is fixed on the fixing frame, and the upper end of the fixing frame is connected and fixed to the lifting block.

2. The rod string adjusting device of a pumping unit according to claim 1, characterized in that, The fixing mechanism includes a fixing clamp, and the fixing clamp clamps the polished rod. A stepped enlarged hole is opened in the upper half section of the polished rod through hole, and the stepped enlarged hole axially limits the lower end of the fixing clamp.

3. The rod string adjusting device for a pumping unit according to claim 1, wherein, A polished rod guiding hole is also arranged on the fixing frame.

4. The rod string adjusting device for a pumping unit according to claim 1, wherein, The power input end of the worm wheel is connected to a hand crank or an electric drill.

5. A sucker rod string adjusting device according to claim 1, characterized in that, The adjusting block is provided with a U-shaped bayonet, and the U-shaped bayonet is used to make way for the polished rod. The U-shaped bayonet is provided with a baffle and a baffle bolt.

6. A method of using the sucker rod string adjusting device as described in claim 5, characterized in that, It includes the following steps: Steps for lifting the rod string of the pumping unit: Drive the worm to rotate, drive the worm wheel nut to rotate, and thus push the lifting block to move; the lifting block lifts and pushes the fixing clamp to drive the entire sucker rod string to move up. Place the adjusting block under the load sensor and insert the bolt to lock the adjusting block and the baffle, or loosen the square clamp on the suspension rope device, and then move down to the length of the rod string to be adjusted, and fix the square clamp above the suspension rope device, so as to realize the rapid lifting of the rod string of the pumping unit; Steps for lowering the rod string of the pumping unit: Unlock the adjusting block and the baffle, pull out the adjusting block under the load sensor, or loosen the square clamp on the suspension rope device, and then move up to the length of the rod string to be adjusted, and fix the square clamp above the suspension rope device; drive the worm to rotate, drive the worm wheel nut to rotate, and thus push the lifting block to move; the lifting block descends, and the fixing clamp and the polished rod follow and move down by their own weight, so as to realize the rapid lowering of the rod string of the pumping unit.

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