Hydraulic unloading tool

Abstract

The utility model discloses hydraulic unloading tool, including U type body, U type body includes fork body one, operating body, fork body two, the fork body one, fork body two sets up lifting mechanism respectively, lifting mechanism includes two hydraulic cylinders, and the movable end of hydraulic cylinder projects on the U type body upper end, and the movable end of two hydraulic cylinders is connected to the supporting plate, and hydraulic cylinder control assembly is arranged on the operating body, the utility model discloses lifting mechanism adopts two hydraulic cylinders and a supporting plate, and the uniform force is carried out to the other side of the card, and the security hidden danger is reduced.

Description

Technical Field

[0001] This utility model relates to the field of oil pumping unit technology, specifically to a hydraulic unloading tool. Background Technology

[0002] With the widespread adoption of the four modernizations in oilfields, wireless load sensors have been installed on pumping equipment at production sites. These sensors are typically installed between the polished rod load clamp and the pumping unit suspension cable, enabling real-time data acquisition, monitoring, and online measurement of well production. When a load sensor is damaged or loses power, it needs to be disassembled and replaced. Currently, replacing load sensors on-site involves unloading the pumping unit using square clamps on the wellhead packing box. This method is relatively cumbersome, requires a long well shutdown time, and poses certain safety hazards. Furthermore, the square clamps are prone to damaging the polished rod during use, further increasing equipment costs.

[0003] Announcement No. CN215672104U discloses a U-shaped extraction device for a pumping unit load sensor, comprising a housing, an operating part, a planetary gear part, and a threaded lifting part. The housing is a hollow U-shaped shell structure with its bottom connected to a suspension rope device. The operating part is rotatably connected to the housing. The planetary gear part is located in the middle of the housing and its outer end is meshed with the operating part. The interior of the planetary gear part is threadedly connected to the threaded lifting part to form a threaded jack structure. The upper part of the threaded lifting part is slidably connected to the housing and its top is connected to a clamp.

[0004] The existing technology has only one lifting thread on one side, which cannot apply force evenly to the clamp and cannot ensure the safe removal of the load sensor.

[0005] Announcement No. CN215148623U discloses a load sensor replacement device, which consists of three parts: an improved square clip, an adjustable support column, and a hydraulic unit. The adjustable support column includes support column one and support column two. The tail ends of support column one and support column two are respectively threaded to the top left and right sides of the front end of the hydraulic unit. The improved square clip is inserted into the notches at the top of support column one and support column two. An oil filling cap and a pressure relief handle are provided on the top left side of the control box, and a pressure lever is provided on the right side of the hydraulic unit. Handles one and two are welded to the bottom of the rear end of the hydraulic unit.

[0006] The existing technology only has one hydraulic cylinder on one side, which cannot apply force evenly to the clamp and cannot ensure the safe removal of the load sensor.

[0007] Announcement No. CN211388585U discloses a U-shaped removal device for a pumping unit load sensor. The device includes a load sensor, with a U-shaped hydraulic jack mounted on its outer side. The height of the load sensor is 1-2 cm greater than the height of the U-shaped hydraulic jack. A suspension rope device is located at the bottom of the U-shaped hydraulic jack. A hydraulic jack is positioned between the clamp and the suspension rope device, allowing the clamp and oil tubing to be lifted upwards, enabling the load sensor to be removed from between the clamp and the suspension rope device for inspection and maintenance.

[0008] The existing technology only has one hydraulic cylinder on one side, which cannot apply force evenly to the clamp and cannot ensure the safe removal of the load sensor.

[0009] 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

[0010] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention provides a hydraulic unloading tool.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A hydraulic unloading tool includes a U-shaped body, which includes a first fork, an operating body, and a second fork. The first and second forks are each equipped with a lifting mechanism, which includes two hydraulic cylinders. The movable ends of the hydraulic cylinders extend out of the upper end of the U-shaped body, and the movable ends of the two hydraulic cylinders are connected to a support plate. The operating body is equipped with a hydraulic cylinder control component.

[0013] Furthermore, the hydraulic cylinder control assembly includes an oil tank, a manual pump, and a pressure relief valve;

[0014] Specifically, the oil tank, manual pump, and pressure relief valve are all located within the operating body;

[0015] Specifically, the oil outlet of the manual pump is connected to the cylinder body of all hydraulic cylinders; the oil suction port of the manual pump is connected to the oil tank.

[0016] Specifically, the pressure relief valve is connected to the cylinder bodies of all hydraulic cylinders; the pressure relief valve is connected to the oil tank.

[0017] Furthermore, the manual pump is a self-resetting piston pump, the piston rod of the manual pump extends out of the operating body, and a reciprocating drive mechanism is provided on the outer wall of the operating body, the reciprocating drive mechanism being connected to the piston rod;

[0018] Specifically, the pressure relief valve is a manual two-position two-way valve, including a blocking position and a conducting position, and the manual lever of the pressure relief valve is located outside the operating body.

[0019] Furthermore, the reciprocating drive mechanism includes a cam;

[0020] Specifically, the cam is rotatably connected to the operating body via a rotating shaft, the rotating shaft is connected to a rotating handle, and the piston rod end of the manual pump contacts the cam.

[0021] Furthermore, a pressure ball is fixedly connected to the free end of the pressure rod, and a pressure ball is fixedly connected to the free end of the rotating handle in the reciprocating drive mechanism.

[0022] Furthermore, the two hydraulic cylinders of the lifting mechanism are symmetrically arranged on the first or second fork body, the first and second fork bodies are vertical rectangles, and the operating body is a horizontal rectangle.

[0023] Furthermore, a level gauge is provided on the side wall of the operating body, and the level gauge is connected to the oil tank; an inlet connected to the oil tank is provided at the upper end of the operating body.

[0024] Furthermore, the side wall of the operating body is provided with a second side groove, the level gauge is installed in the second side groove, the lower surface of the second side groove is provided with a connecting hole, the pipeline of the level gauge is connected to the oil tank through the connecting hole, and the opening of the second side groove is provided with a transparent protective cover.

[0025] Furthermore, it also includes a handle, with handles provided on two side walls of the operating body parallel to the direction of the fork, and the handles extending obliquely downward.

[0026] Furthermore, the level gauge and reciprocating drive mechanism are mounted on the side wall of the operating body parallel to the direction of the fork body. The manual pump is installed on the side wall of the operating body corresponding to the reciprocating drive mechanism. The piston rod of the manual pump extends out of the operating body, and the pressure rod of the pressure relief valve is installed on the upper end face of the operating body. This invention has the following advantages compared to the prior art:

[0027] 1. The lifting mechanism of this utility model uses two hydraulic cylinders and a support plate to apply force evenly to the square clamp, reducing safety hazards.

[0028] 2. By setting up a pressure rod, a cam rocker arm, and pressure balls one and two, the operation of this utility model is convenient and quick, reducing operation steps and improving work efficiency.

[0029] 3. This utility model uses a hydraulic unloading method, eliminating the need for square clamps during operation, reducing safety hazards, and helping to extend the service life of the smooth rod. The included handle, joystick, and other components make the tool easy to carry and use, facilitating operation and greatly improving work efficiency.

[0030] 4. The hydraulic unloading tool involved in this utility model is small in size and light in weight (3 kg), can be operated by one person, is easy to install and disassemble, and is safer and more reliable. Attached Figure Description

[0031] Figure 1 This is a structural schematic diagram of the hydraulic unloading tool of this utility model.

[0032] Figure 2 This is a schematic diagram of the installation of the level gauge, cam 15, and rocker arm 151 in this utility model.

[0033] Figure 3 This is a schematic diagram of the handle installation in this utility model.

[0034] Figure 4 This is a hydraulic pipeline diagram of this utility model.

[0035] In the diagram: 1. U-shaped body; 101. Fork body one; 102. Operating body; 103. Fork body two; 11. Hydraulic cylinder; 12. Support plate; 13. Liquid inlet; 14. Pressure rod; 15. Cam; 151. Rotary handle; 16. Pressure ball one; 17. Pressure ball two; 2. Side groove one; 21. Mounting plate; 22. Handle; 23. Anti-slip sleeve; 3. Side groove two; 31. Liquid level gauge; 32. Protective cover; 41. Oil tank; 42. Manual pump; 43. Pressure relief valve. 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 3The hydraulic unloading tool provided by this utility model includes a U-shaped body 1, which includes a fork 101, an operating body 102, and a fork 2 103. The fork 101 and fork 2 103 are respectively equipped with lifting mechanisms, each including two hydraulic cylinders 11. The movable ends of the hydraulic cylinders 11 extend beyond the upper end of the U-shaped body 1, and the movable ends of the two hydraulic cylinders 11 are connected to a support plate 12. A hydraulic cylinder control assembly is provided on the operating body 102. In use, the U-shaped body 1 is inserted between the lower plate of the suspension device and the square clamp, so that the U-shaped body partially encloses the load sensor on the outside. Then, the movable ends of the hydraulic cylinders 11 are extended through the hydraulic cylinder control assembly, pushing the support plate 12 upward, widening the distance between the upper and lower contact surfaces of the load sensor, thus unloading the load sensor. After removing the old load sensor and replacing it with a new one, the support plate 12 is retracted, the load sensor is loaded, and the U-shaped body 1 is removed, thus realizing the disassembly and replacement of the load sensor.

[0039] Specifically, the two hydraulic cylinders of the lifting mechanism are symmetrically arranged on the fork body 101 or the fork body 103, and the support plate 12 is connected to the movable end of the hydraulic cylinder by hexagonal bolts.

[0040] Specifically, the fork body 101 and fork body 2 103 are vertical rectangular bodies, and the operating body 102 is a horizontal rectangular body. The fork body 101, fork body 2 103 and operating body 102 are all spliced ​​together by steel plates. The steel plates are welded together to form an open shape at the top, and the upper sealing steel plate is installed by screws to facilitate disassembly, maintenance and repair.

[0041] Furthermore, the hydraulic cylinder control assembly includes an oil tank 41, a manual pump 42, and a pressure relief valve 43. The oil tank 41, manual pump 42, and pressure relief valve 43 are all located inside the operating body 102. The oil outlet of the manual pump 42 is connected to the cylinder body of all hydraulic cylinders 11, the pressure relief valve 43 is connected to the cylinder body of all hydraulic cylinders 11, the oil suction port of the manual pump 42 is connected to the oil tank 41, and the pressure relief valve 43 is connected to the oil tank 41. Hydraulic oil is pumped from the oil tank 41 into the hydraulic cylinders 11 via the manual pump 42 for lifting. After the operation is completed, the oil flows back to the oil tank via the pressure relief valve 43.

[0042] Specifically, the manual pump 42 is a self-resetting piston pump. The piston rod of the manual pump 42 extends out of the operating body 102. A reciprocating drive mechanism is provided on the outer wall of the operating body 102. The reciprocating drive mechanism drives the piston rod to press the hydraulic oil in the manual pump 42 out to the hydraulic cylinder 11. The spring causes the piston rod to automatically reset.

[0043] Specifically, the pressure relief valve 43 is a manual two-position two-way valve, including a blocking position and a conducting position, and the manual lever 14 of the pressure relief valve 43 is located outside the operating body 102.

[0044] Specifically, the reciprocating drive mechanism includes a cam 15, which is rotatably connected to the operating body 102 via a rotating shaft and two bearings with seats. The rotating shaft is connected to a handle 151, and the piston rod end of the manual pump 42 contacts the cam 15. Rotating the handle 151 compresses the piston rod of the manual pump 42 through the far point of the cam 15, and the piston rod automatically resets through the near point of the cam 15 and the spring of the manual pump 42.

[0045] Specifically, a pressure ball 16 is fixedly connected to the free end of the pressure rod 14, which makes it convenient for the user to press the pressure rod 14 to release pressure. A pressure ball 2 17 is fixedly connected to the free end of the handle in the reciprocating drive mechanism, which makes it convenient for the user to press the reciprocating drive mechanism.

[0046] Specifically, a level gauge 31 is provided on the side wall of the operating body 102, and the level gauge 31 is connected to the oil tank.

[0047] More specifically, the side wall of the operating body 102 is provided with a second side groove 3, the level gauge 31 is installed in the second side groove 3, the lower surface of the second side groove 3 is provided with a connecting hole, the pipeline of the level gauge 31 is connected to the oil tank through the connecting hole, and the opening of the second side groove 3 is provided with a transparent protective cover 32 to protect the level gauge 31.

[0048] Specifically, the upper end of the operating body 102 is provided with a liquid inlet 13 that communicates with the oil tank. The top of the liquid inlet 13 is detachably connected with a liquid inlet cap by a bolt, and hydraulic oil is poured into the oil tank through the liquid inlet 13.

[0049] The hydraulic cylinder 11 acts as a jack, pushing upward to open the part that clamps the load sensor, thereby unloading the load.

[0050] For the commonly used manual testing three-piece set, this utility model can directly use the three-piece set to complete the unloading; for oil wells without a testing three-piece set, the installation position of the load sensor can be simply improved, and the upper and lower plates of the suspension rope can be used for unloading.

[0051] In operation, first stop the pumping unit near the bottom dead center position, then remove the cover screws and cover plate of the original load sensor. Press the lever 14 of the pressure relief valve 43 to open the pressure relief valve, allowing the hydraulic oil to flow back to the oil tank 41, and lower the hydraulic cylinder 11 to the lower limit position. Insert the unloading tool into both sides of the sensor from the direction of the load sensor cover plate, then close the pressure relief valve 43. By reciprocating the crank 151 of the oscillating cam 15, the manual pump 43 continuously pressurizes the hydraulic cylinder, causing the hydraulic cylinder 11 to rise until it successfully lifts the pressure plate above the load sensor. At this point, the old load sensor can be removed from the unloading tool and replaced with the new sensor. After replacement, press the lever 14 of the pressure relief valve 42 to open the pressure relief valve 42, causing the hydraulic cylinder 11 to retract. Remove the unloading tool, and finally install the baffle of the new load sensor and tighten the fixing screws. After completing the above operations, start the pumping unit to resume normal production.

[0052] This embodiment employs a hydraulic unloading method, which avoids damage to the polished rod caused by using square clamps for unloading. Damage to the polished rod can lead to leaks in the wellhead seal, posing environmental risks. Furthermore, prolonged use of square clamps for unloading can result in severe damage to the polished rod, necessitating replacement and incurring costs. This embodiment uses hydraulic unloading, allowing direct installation and removal of the load sensor, simplifying the operation process, reducing operation time, and eliminating safety hazards. Due to its small size and weight of only 3 kg, it can be operated by a single person, making it safer and more reliable, increasing work efficiency by 60%, and yielding significant economic and social benefits.

[0053] Example 2:

[0054] Based on Embodiment 1, the operating body 102 of the U-shaped body 1 in this embodiment is provided with a handle 22. The operating body 102 is provided with handles 22 on two side walls parallel to the direction of the fork. The handles 22 extend obliquely downward to facilitate lifting the hydraulic unloading tool by the handle.

[0055] Specifically, the level gauge 31 and the reciprocating drive mechanism are arranged on the side wall of the operating body 102 parallel to the direction of the fork body. The manual pump 42 is installed on the inner wall of the operating body 102 corresponding to the side of the reciprocating drive mechanism. The piston rod of the manual pump 42 extends out of the operating body 102. The pressure rod 14 of the pressure relief valve 43 is installed on the upper end face of the operating body 102.

[0056] Specifically, the operating body 1022 has a side groove 2 symmetrically arranged on the side wall parallel to the direction of the fork body. The side groove 2 is detachably provided with an installation plate 21. The installation plate 21 is connected to the handle 22. The outer ring of the handle 22 is connected with an anti-slip sleeve 23 to prevent the user from slipping when picking up the handle 22.

[0057] More specifically, the mounting plate 21 is an L-shaped plate, and the mounting plate 21 is connected to the side groove 2 by screws. The mounting plate 21 is connected to the U-shaped seat by screws on the plate perpendicular to the groove 2. The U-shaped seat is connected to the handle 22 by a circumferential locking key, such as by a key or spline with an elongated cross-section. Using an elongated cross-section key makes the handle angle unique, while using a spline allows the handle to be produced at preset angles.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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 hydraulic unloading tool, comprising a U-shaped body, wherein the U-shaped body includes a first fork, an operating body, and a second fork, wherein the first fork and the second fork are respectively provided with lifting mechanisms, characterized in that, The lifting mechanism includes two hydraulic cylinders, the movable ends of which extend out of the upper end of the U-shaped body. The movable ends of the two hydraulic cylinders are connected to a support plate, and a hydraulic cylinder control component is provided on the operating body.

2. The hydraulic unloading tool according to claim 1, characterized in that, The hydraulic cylinder control assembly includes an oil tank, a manual pump, and a pressure relief valve; The oil tank, manual pump, and pressure relief valve are all located inside the operating body; The oil outlet of the manual pump is connected to the cylinder body of all hydraulic cylinders; the oil suction port of the manual pump is connected to the oil tank. The pressure relief valve is connected to the cylinder body of all hydraulic cylinders; the pressure relief valve is connected to the oil tank.

3. The hydraulic unloading tool according to claim 2, characterized in that, The manual pump is a self-resetting piston pump. The piston rod of the manual pump extends out of the operating body. A reciprocating drive mechanism is provided on the outer wall of the operating body. The reciprocating drive mechanism is connected to the piston rod. The pressure relief valve is a manual two-position two-way valve, including a blocking position and a conducting position, and the manual lever of the pressure relief valve is located outside the operating body.

4. The hydraulic unloading tool according to claim 3, characterized in that, The reciprocating drive mechanism includes a cam; The cam is rotatably connected to the operating body via a rotating shaft, the rotating shaft is connected to a rotating handle, and the piston rod end of the manual pump contacts the cam.

5. The hydraulic unloading tool according to claim 4, characterized in that, The free end of the pressure rod is fixedly connected to a pressure ball one, and the free end of the rotating handle in the reciprocating drive mechanism is fixedly connected to a pressure ball two.

6. The hydraulic unloading tool according to claim 1, characterized in that, The two hydraulic cylinders of the lifting mechanism are symmetrically arranged on the first or second fork body. The first and second fork bodies are vertical rectangles, and the operating body is a horizontal rectangle.

7. The hydraulic unloading tool according to claim 3, characterized in that, A level gauge is installed on the side wall of the operating body, and the level gauge is connected to the oil tank; an inlet connected to the oil tank is provided at the upper end of the operating body.

8. The hydraulic unloading tool according to claim 7, characterized in that, The operating body has a second side groove on its side wall, the level gauge is installed in the second side groove, the lower surface of the second side groove has a connecting hole, the pipeline of the level gauge is connected to the oil tank through the connecting hole, and the opening of the second side groove is provided with a transparent protective cover.

9. The hydraulic unloading tool according to claim 1, characterized in that, It also includes a handle, which is provided on two side walls of the operating body parallel to the direction of the fork, and the handle extends obliquely downward.

10. The hydraulic unloading tool according to claim 7, characterized in that, The level gauge and reciprocating drive mechanism are mounted on the side wall of the operating body parallel to the direction of the fork. The manual pump is installed on the side wall of the operating body corresponding to the reciprocating drive mechanism. The piston rod of the manual pump extends out of the operating body. The pressure relief valve rod is installed on the upper end face of the operating body.

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