Mechanical pumping gas pump rod maintenance device

Abstract

The application discloses a machine pumping gas pump rod maintenance device and relates to the technical field of mineral exploitation. The technical scheme is characterized in that the device comprises an inner sleeve and an outer sleeve arranged at the periphery of the inner sleeve, an installation chamber is formed between the inner sleeve and the outer sleeve, and the two are connected through connecting ring plates at the upper and lower ends; the inner sleeve is internally provided with two groups of cleaning mechanisms that alternately work; the cleaning mechanisms comprise multiple groups of cleaning arms that are evenly and hingedly arranged on the inner wall of the inner sleeve, wherein the cleaning arms comprise a rotating rod and a rubber clamp plate that is hingedly arranged at one end of the rotating rod; a wheel control mechanism that controls the cleaning arms in the two groups of cleaning mechanisms to alternately clamp the pump rod is arranged in the installation chamber. The application is used by being sleeved on the pump rod, and two groups of cleaning assemblies that can alternately clean the surface of the pump rod are arranged at the upper end, so that the device can reciprocally slide along the whole pump rod in the process of reciprocating movement of the pump rod, thereby continuously cleaning the surface impurities of the pump rod and ensuring stable working condition operation of the pump rod.

Description

Technical Field

[0001] This invention relates to the field of mineral mining technology, specifically to a maintenance device for a mechanical extraction air pump rod. Background Technology

[0002] Mechanical pumping and drainage is a common process in shale gas extraction. During shale gas extraction, a large amount of water may accumulate inside the well. To increase well production, this water needs to be pumped out. This is done by a pumping unit that uses a pump rod connected to a plunger to reciprocate within the wellbore, pumping out the water. This process is similar to the principle of a hand-operated water well. However, as the water is pumped out, it may also carry a large amount of impurities. These impurities, as they rise, gradually adhere to the pump rod, increasing its weight and resistance within the liquid. This leads to poorer pump rod performance under high-frequency reciprocating strokes, reducing the stability of the rod system.

[0003] In view of this, a design or technical improvement is proposed to solve the above problems.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is the closest prior art. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a maintenance device for the pump rod of a mechanical extraction gas pump.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A maintenance device for a gas extraction pump rod includes an inner sleeve and an outer sleeve surrounding the inner sleeve. An installation chamber is formed between the inner and outer sleeves, and they are connected by connecting ring plates at their upper and lower ends. The inner sleeve contains two sets of alternating cleaning mechanisms to remove surface impurities from the pump rod during its reciprocating motion. Each cleaning mechanism includes multiple sets of cleaning arms evenly distributed and hinged to the inner wall of the inner sleeve. Each cleaning arm includes a rotating rod and a rubber clamp hinged to one end of the rotating rod. The rotating rod is hinged to a mounting bracket on the inner wall of the inner sleeve, and when the rubber clamp is held against the outer surface of the pump rod, the rotating rod is tilted. A wheel control mechanism is provided within the installation chamber to control the alternating clamping of the pump rod by the cleaning arms in the two sets of cleaning mechanisms.

[0008] Furthermore, the inner sleeve is provided with a limiting component that ensures the clamping surface of the limiting rubber clamp remains parallel to the outer surface of the pump rod. The limiting component includes a movable block that slides vertically within an evenly distributed mounting groove on the inner sleeve, and a connecting rod that is movably inserted into the movable block and whose end is connected to the back of the rubber clamp. First limiting grooves are provided on both sides of the mounting groove, and first limiting sliders that engage and slide within the first limiting grooves are provided on both sides of the movable block.

[0009] Furthermore, a first spring is provided between the movable block and the inner wall of the mounting groove, and the rubber clamp is held by the pump rod outer surface in a non-deformed state.

[0010] Furthermore, the wheel control mechanism includes two sets of locking components that control the opening of the cleaning arms in the two sets of cleaning mechanisms, and a triggering component that synchronously controls the two sets of locking components to alternately lock and release the cleaning arms in the two sets of cleaning mechanisms.

[0011] Furthermore, the locking assembly includes a rear block disposed at the end of the movable block away from the rubber clamp, a limiting sleeve evenly distributed on the outer surface of the inner sleeve, and a trigger rod that moves up and down within the limiting sleeve; the upper and lower ends of the trigger rod are provided with hooks, the rear block has a slot on the side near the trigger rod, a first wedge-shaped surface that fits and abuts the hooks is provided in the slot, and a slot that fits and engages with the hooks is provided on the side of the first wedge-shaped surface away from the trigger rod.

[0012] Furthermore, the triggering assembly includes connecting brackets disposed on the upper and lower sides of the trigger rod, mounting sleeves disposed on the connecting brackets, a feedback rod that is vertically limited and movable within a second limiting groove opened on the mounting sleeve and movably connected to the connecting ring plate, and a side push rod disposed on the feedback rod; a third limiting groove is opened at the side end of the second limiting groove for the side push rod to be limited and slid; a second spring is disposed between the feedback rod and the inner wall of the second limiting groove; a second wedge-shaped surface is disposed at the end of the rear block near the side push rod that is adapted to and abuts against the side push rod.

[0013] Furthermore, a third spring sleeved on the connecting rod is provided between the rear block and the movable block.

[0014] Furthermore, the mounting sleeve has a fourth limiting groove on both sides, and the inner sleeve is provided with a retainer, and the retainer is provided with a second limiting slider that is slidably engaged in the fourth limiting groove.

[0015] Furthermore, a feedback ring plate is connected to the feedback rod located on the same side of the inner sleeve.

[0016] Furthermore, the mounting bracket is hinged to the middle position of the rotating rod, and the inner sleeve is provided with a limiting block for overlapping the end of the rotating rod away from the rubber clamp, wherein the limiting block is made of rubber.

[0017] Compared with the prior art, the beneficial effects of this solution are: the present invention is used by being sleeved on the pump rod, and by utilizing the two sets of cleaning components set at its upper end that can alternately clean the surface of the pump rod, so that the device can slide back and forth along the entire body of the pump rod during the reciprocating motion of the pump rod, thereby continuously cleaning the surface impurities and ensuring the stable operation of the pump rod. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0019] Figure 1 This is a schematic diagram of the usage state of an embodiment of the present invention;

[0020] Figure 2 This is a cross-sectional perspective view of an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the mounting chamber in an embodiment of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of the inner sleeve in an embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the inner sleeve structure in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram illustrating the cooperation between the cleaning mechanism and the wheel control mechanism in an embodiment of the present invention;

[0025] Figure 7 This is a partial structural schematic diagram of the wheel control mechanism in an embodiment of the present invention;

[0026] Figure 8 This is a disassembly diagram of the mounting sleeve and feedback rod in an embodiment of the present invention;

[0027] Figure 9 This is a schematic diagram of the structure of the limiting component in an embodiment of the present invention;

[0028] Figure 10 This is a schematic diagram of the structure of the post-block in an embodiment of the present invention.

[0029] In the diagram: 1. Inner sleeve; 11. Outer sleeve; 12. Installation chamber; 13. Connecting ring plate; 2. Cleaning arm; 21. Rotating rod; 22. Rubber clamp; 23. Mounting bracket; 3. Mounting groove; 31. Movable block; 32. Linking rod; 33. First limiting slide groove; 34. First limiting slider; 35. First spring; 4. Rear block; 41. Limiting sleeve; 42. Trigger rod; 43. Hook; 44. Groove; 45. First wedge surface; 46. Slot; 5. Connecting bracket; 51. Installation sleeve; 52. Second limiting slide groove; 53. Feedback rod; 54. Side push rod; 55. Third limiting slide groove; 56. Second spring; 57. Second wedge surface; 6. Third spring; 7. Fourth limiting slide groove; 71. Retainer; 72. Second limiting slider; 8. Feedback ring plate; 9. Limiting block. Detailed Implementation

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1-10The illustrated shale gas extraction pump rod maintenance device is used in shale gas extraction operations. It includes an inner casing 1 and an outer casing 11 surrounding the inner casing 1. An installation chamber 12 is formed between the inner casing 1 and the outer casing 11, and the two are connected by connecting ring plates 13 at their upper and lower ends. The inner casing 1 is equipped with two sets of alternating cleaning mechanisms to remove surface impurities during the reciprocating motion of the pump rod. Each cleaning mechanism includes multiple sets of cleaning arms 2 evenly distributed and hinged to the inner wall of the inner casing 1. Each cleaning arm 2 includes a rotating rod 21 and a rubber clamp 22 hinged to one end of the rotating rod 21. The rotating rod 21 is connected to a mounting bracket 23 mounted on the inner wall of the inner casing 1. When the pump rod is hinged and the rubber clamp 22 is held against the outer surface of the pump rod, the rotating rod 21 is tilted. The installation chamber 12 is equipped with a wheel control mechanism that controls the alternating clamping of the pump rod by the cleaning arms 2 in the two sets of cleaning mechanisms. This device is fitted onto the pump rod for use. Its main working process involves the alternating operation of the cleaning mechanisms inside, thereby cleaning impurities from the outer surface of the pump rod. When the pump rod reciprocates, the rotating rod 21 in one set of cleaning mechanisms clamps against the outer surface of the pump rod. Combined with the pressure of the water flow, this causes the device to drive the rotating rod 21 to slide against the surface of the pump rod, thus scraping away impurities. Furthermore, the shape of the rotating rod 21 ensures that the device can effectively clean impurities from the pump rod even when not sliding. When the pump rod reaches its end, it can only move in one direction along the pump rod. Specifically, when the pump rod reciprocates, the water flow inside it applies water pressure in the opposite direction of the pump rod's movement, thus applying pressure to the device. When this pressure is opposite to the rotation direction of the rubber clamp 22 held on the surface of the pump rod away from the pump rod, the rubber clamp 22 will tend to move away from the surface of the pump rod under the push of the water pressure, thus causing sliding friction with the surface of the pump rod. At this time, the device slides in the opposite direction to the movement of the pump rod, thereby cleaning impurities on the surface of the pump rod in conjunction with the sliding friction. When the water pressure is the same as the rotation direction of the rubber clamp 22 held on the surface of the pump rod away from the pump rod, the rubber clamp 22... 2 will tend to rotate towards the surface of the pump rod, making the clamping between it and the pump rod more secure. As a result, the device will move synchronously with the pump rod, and its relative position will remain unchanged. During the periodic reciprocating motion of the pump rod, the device will gradually slide along the pump rod in one direction until it slides to the end of the pump rod. When it slides to the end, the wheel control mechanism will control the cleaning mechanism to rotate. At this time, the rubber clamp 22 that was in the opposite clamping state to the rubber clamp 22 that was previously cleaning the pump rod will start to clamp the pump rod, while the rubber clamp 22 in the other set of cleaning mechanisms will release the clamp. Then, during the reciprocating motion of the pump rod, the device will start to slide and crawl in the direction, thereby performing the back-moving cleaning operation.

[0032] In one embodiment, the inner sleeve 1 is provided with a limiting component that ensures the clamping surface of the limiting rubber clamp 22 remains parallel to the outer surface of the pump rod. The limiting component includes a movable block 31 that slides vertically within an evenly distributed mounting groove 3 on the inner sleeve 1, and a connecting rod 32 that is movably inserted into the movable block 31 and whose end is connected to the back of the rubber clamp 22. First limiting grooves 33 are provided on both sides of the mounting groove 3, and first limiting sliders 34 that slide and engage within the first limiting grooves 33 are provided on both sides of the movable block 31. The connecting rod 32 is perpendicular to the rubber clamp 22. When the rubber clamp 22 rotates under the drive of the rotating rod 21, the connecting rod 32 slides horizontally synchronously within the movable block 31, while the movable block 31 slides vertically synchronously with the rubber clamp 22. The two work together to limit the rubber clamp 22, so that the rubber clamp 22 remains parallel to the pump rod during clamping, thereby ensuring that it can stably clamp the surface of the pump rod during clamping.

[0033] In one embodiment, a first spring 35 is provided between the movable block 31 and the inner wall of the mounting groove 3. The first spring 35 is provided so that the rubber clamp 22 is initially clamped to the outer surface of the pump rod. When the rubber clamp 22 moves away from the pump rod, the first spring 35 will contract and deform under the sliding of the movable block 31, thereby achieving the effect of automatically clamping and resetting the rubber clamp 22.

[0034] In one embodiment, the wheel control mechanism includes two sets of locking components that control the opening of the cleaning arms 2 in the two sets of cleaning mechanisms, and a triggering component that synchronously controls the two sets of locking components to alternately lock and release the cleaning arms 2 in the two sets of cleaning mechanisms. The locking components are used to lock the rubber clamp 22 when it rotates away from the outer surface of the pump rod, so that it does not contact the pump rod. When the triggering component triggers the locking components, one set of locking components controls the rubber clamp 22 in one set of cleaning mechanisms to open, and the other set of locking components controls the rubber clamp 22 in the other set of cleaning mechanisms to release, thereby achieving the working effect of the rubber clamp 22 in the two sets of cleaning mechanisms alternately clamping and cleaning the pump rod.

[0035] In one embodiment, the locking assembly includes a rear block 4 disposed at the end of the movable block 31 away from the rubber clamp 22, a limiting sleeve 41 evenly distributed on the outer surface of the inner sleeve 1, and a trigger rod 42 that passes through the limiting sleeve 41 and moves vertically and vertically. The trigger rod 42 has hooks 43 at both ends. A slot 44 is provided on the side of the rear block 4 near the trigger rod 42. A first wedge-shaped surface 45 that fits and abuts against the hooks 43 is provided in the slot 44. A groove 46 that fits and abuts against the hooks 43 is provided on the side of the first wedge-shaped surface 45 away from the trigger rod 42. When the trigger rod 42 moves towards the rear block 4, it abuts against the hooks 43. The first wedge-shaped surface 45 inside the rear block 4 is engaged, thereby abutting the rear block 4 in a direction parallel to the trigger rod 42. At the same time, the trigger rod 42 also abuts the first wedge-shaped surface 45, causing the rear block 4 to move in a direction perpendicular to the trigger rod 42. The rear block 4 then drives the rubber clamp 22 to move synchronously through the linkage rod 32, causing the rubber clamp 22 to rotate away from the pump rod. When the trigger rod 42 slides to a misalignment with the first wedge-shaped surface 45, the hook 43 at its upper end will lock into the slot 46, thereby limiting the rear block 4 and controlling the rubber clamp 22 to be limited and locked away from the pump rod.

[0036] In one embodiment, the triggering assembly includes connecting brackets 5 disposed on the upper and lower sides of the trigger rod 42, mounting sleeves 51 disposed on the connecting brackets 5, a feedback rod 53 that is vertically limited and movable within a second limiting groove 52 opened on the mounting sleeve 51 and movably connected to the connecting ring plate 13, and a side push rod 54 disposed on the feedback rod 53; a third limiting groove 55 is opened at the side end of the second limiting groove 52 for the side push rod 54 to be limited and slid; a second spring 56 is disposed between the feedback rod 53 and the inner wall of the second limiting groove 52; the rear block 4 is close to One end of the side push rod 54 is provided with a second wedge-shaped surface 57 that fits and abuts against the side push rod 54. A third spring 6 is provided between the rear block 4 and the movable block 31 and is sleeved on the connecting rod 32. When the locking assembly limits and locks the rubber clamp 22, the third spring 6 is in a stretched deformation state. When the device moves to one end of the pump rod, the feedback rod 53 on the corresponding side will abut against the inner wall of the gas sampling pipeline, thereby causing it to move in the opposite direction to the movement direction of the device, thereby driving the side push rod 54 to move synchronously. The second spring 56 is compressed and stores force. The push rod 54 abuts against the second wedge-shaped surface 57 at the upper end of the rear block 4, thereby pushing the rear block 4 to continue sliding along the side away from the inner sleeve 1. This causes the hook 43 on the trigger rod 42 to disengage from the slot 46. At this time, the second spring 56 is compressed to its limit, and the feedback rod 53 drives the mounting sleeve 51 to move synchronously. The mounting sleeve 51 drives the trigger rod 42 to move to the opposite side through the connecting bracket 5, thereby causing the hook 43 at its end to begin to move away from the previously latched rear block 4. The rear block 4 returns to its original position under the rebound action of the third spring 6. The position is then adjusted, and the rubber clamp 22 is pushed towards the pump rod side by the linkage rod 32. The first spring 35 pushes the movable block 31 to reset, so that the rubber clamp 22 is released and clamped on the surface of the pump rod. At this time, under the push of the feedback rod 53, the trigger rod 42 will slide with the feedback rod 53 to abut against the rear block 4 on the other side. Then, by pushing the rear block 4, the corresponding connected rubber clamp 22 is opened to clamp the pump rod, thereby realizing the operation effect of alternating control of the rubber clamp 22 clamping the pump rod in the two sets of cleaning components.

[0037] In one embodiment, the mounting sleeve 51 has a fourth limiting groove 7 on both sides, and a retainer 71 is provided on the inner sleeve 1. The retainer 71 is provided with a second limiting slider 72 that is slidably engaged in the fourth limiting groove 7, thereby ensuring that the up and down sliding of the mounting sleeve 51 is more stable and the fit between the structures is more stable.

[0038] In one embodiment, a feedback ring plate 8 is connected to the feedback rod 53 on the same side of the inner sleeve 1. By setting the feedback ring plate 8, when the device moves to one end of the pump rod, the feedback rod 53 on the same side of the inner sleeve 1 can be triggered simultaneously, thereby ensuring that the multiple sets of rubber clamps 22 in the cleaning assembly can keep synchronously clamping and moving away from the moving part, and ensuring the working stability of the structure.

[0039] In one embodiment, the mounting bracket 23 is hinged to the middle position of the rotating rod 21. The inner sleeve 1 is provided with a limiting block 9 for overlapping the end of the rotating rod 21 away from the rubber clamp 22. The limiting block 9 is made of rubber. By setting the limiting block 9, the rotating rod 21 drives the rubber clamp 22 to rotate to a certain position and is then limited, so as to avoid the rubber clamp 22 being clamped too tightly with the pump rod, which would cause excessive deformation of itself.

[0040] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A maintenance device for the pump rod of a machine-extracting gas pump, characterized in that: It includes an inner sleeve (1) and an outer sleeve (11) disposed around the inner sleeve (1), wherein an installation chamber (12) is formed between the inner sleeve (1) and the outer sleeve (11), and the two are connected by connecting ring plates (13) at the upper and lower ends; The inner sleeve (1) is provided with two sets of alternating cleaning mechanisms, which are used to remove surface impurities when the pump rod is in reciprocating motion. The cleaning mechanism includes multiple sets of cleaning arms (2) that are evenly distributed and hinged on the inner wall of the inner sleeve (1), wherein the cleaning arm (2) includes a rotating rod (21) and a rubber clamp (22) hinged to one end of the rotating rod (21). The rotating rod (21) is hinged to the mounting bracket (23) set on the inner wall of the inner sleeve (1), and when the rubber clamp (22) is clamped on the outer surface of the pump rod, the rotating rod (21) is in an inclined state; The installation chamber (12) is equipped with a wheel control mechanism that controls the cleaning arms (2) of the two sets of cleaning mechanisms to alternately clamp the pump rod; The inner sleeve (1) is provided with a limiting component that ensures the clamping surface of the limiting rubber clamp (22) is always parallel to the outer surface of the pump rod; The limiting component includes a movable block (31) that slides up and down within an installation groove (3) evenly distributed on the inner sleeve (1), and a connecting rod (32) that is movably inserted into the movable block (31) and whose end is connected to the back of the rubber clamp (22). The mounting groove (3) has a first limiting slide groove (33) on both sides, and the movable block (31) has a first limiting slider (34) on both sides that is engaged and slidable in the first limiting slide groove (33). The wheel control mechanism includes two sets of locking components that control the opening of the cleaning arms (2) in the two sets of cleaning mechanisms respectively, and a triggering component that synchronously controls the two sets of locking components to alternately lock and release the cleaning arms (2) in the two sets of cleaning mechanisms; The locking assembly includes a rear block (4) disposed at the end of the movable block (31) away from the rubber clamp (22), a limiting sleeve (41) evenly distributed on the outer surface of the inner sleeve (1), and a trigger rod (42) that passes through the limiting sleeve (41) and moves up and down to limit movement. The trigger rod (42) is provided with hooks (43) at both ends. The rear block (4) is provided with a slot (44) on the side near the trigger rod (42). A first wedge-shaped surface (45) is provided in the slot (44) to fit and engage with the hook (43). A slot (46) is provided on the side of the first wedge-shaped surface (45) away from the trigger rod (42) to fit and engage with the hook (43).

2. The maintenance device for the pump rod of the machine extraction gas extraction system according to claim 1, characterized in that: A first spring (35) is provided between the movable block (31) and the inner wall of the mounting groove (3), and the first spring (35) is held by the rubber clamp (22) and the outer surface of the pump rod in a non-deformed state.

3. The maintenance device for the pump rod of the machine extraction gas as described in claim 1, characterized in that: The triggering assembly includes a connecting frame (5) disposed on the upper and lower sides of the triggering rod (42), a mounting sleeve (51) disposed on the connecting frame (5), a feedback rod (53) that is vertically limited and movable in the second limiting groove (52) opened on the mounting sleeve (51) and movably connected to the connecting ring plate (13), and a side push rod (54) disposed on the feedback rod (53). The second limiting groove (52) has a third limiting groove (55) at its side end for the side push rod (54) to limit the sliding. A second spring (56) is provided between the feedback rod (53) and the inner wall of the second limiting slide (52); The rear block (4) has a second wedge-shaped surface (57) that is adapted to and abuts against the side push rod (54) at one end.

4. The maintenance device for the pump rod of the machine extraction gas extraction system according to claim 3, characterized in that: A third spring (6) is provided between the rear block (4) and the movable block (31) and is sleeved on the connecting rod (32).

5. The maintenance device for the pump rod of the machine extraction gas extraction unit according to claim 3, characterized in that: The mounting sleeve (51) has a fourth limiting groove (7) on both sides, and a retainer (71) is provided on the inner sleeve (1). The retainer (71) has a second limiting slider (72) that is slidably engaged in the fourth limiting groove (7).

6. The maintenance device for the pump rod of the machine extraction gas extraction system according to claim 4, characterized in that: The feedback rod (53) located on the same side as the inner sleeve (1) is connected to a feedback ring plate (8).

7. The maintenance device for the pump rod of the machine extraction gas extraction system according to claim 1, characterized in that: The mounting bracket (23) is hinged to the middle position of the rotating rod (21), and the inner sleeve (1) is provided with a limiting block (9) for connecting the end of the rotating rod (21) away from the rubber clamp (22), wherein the limiting block (9) is made of rubber.

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