A light load shock absorber assembly for a pumping well

Abstract

The present invention discloses a lightweight load shock absorber assembly for a pumping well, which relates to the technical field of pumping units. It comprises: a load hanging plate, the load hanging plate is provided with a side groove, the load hanging plate is provided with a shock absorbing assembly for alleviating alternating loads; the shock absorbing assembly comprises: a support member, two shock absorbing blocks and a plurality of connecting bolts, the support member is located on the upper side of the load hanging plate and is in contact with the square card, and the two shock absorbing blocks are symmetrically distributed between the support member and the load hanging plate. The present invention dissipates mechanical vibration energy through the elastic deformation of the shock absorbing blocks, converts the originally rigid impact load transfer into a quasi-static gradual process, reduces the amplitude of the alternating stress, and reduces the peak value of the impact force transmitted to the pumping rod, light rod and other components by suppressing the load change rate, thereby reducing the cumulative rate of fatigue damage to the equipment caused by the alternating load, thereby extending the life of the equipment and reducing the frequency of unplanned shutdowns of oil wells.

Description

Technical Field

[0001] The present invention relates to the technical field of oil pumping units, and in particular to a light-load shock absorber assembly for an oil pumping well. Background Art

[0002] The walking beam pumping unit is the core lifting equipment of the rod pumping system. It drives the rod to realize reciprocating linear motion through the periodic swing of the donkey head. The rope hanger is the key connecting device between the donkey head and the rod. It consists of a load hanging plate, a wire rope fastening mechanism and an anti-jump baffle. There are symmetrical through-type rope holes at both ends of the load hanging plate. The donkey head wire rope is anchored by fasteners and then inserted into the rope holes to form a flexible connection. During the working process, the donkey head pulls the load hanging plate through the wire rope, and then the rod clip drives the rod to complete the stroke movement. In the pumping operation, the alternating load borne by the system has a significant amplitude-frequency characteristic: during the upstroke, the suspension point load includes the gravity of the liquid column, The weight of the rod string and the acceleration inertia force; the downstroke is mainly affected by the buoyant weight of the rod string and the fluid resistance. This periodic load fluctuation causes asymmetric cyclic stress in the pumping system, forming a typical fatigue working condition; long-term alternating stress will cause multiple failures: micro-wear grooves are generated on the surface of the rod, resulting in failure of the packing seal; fatigue cracks are generated at the root of the sucker rod coupling thread; adhesive wear occurs on the plunger pair of the pump, reducing the pump efficiency; contact fatigue peeling occurs on the tooth surface of the reduction box gear; micro-motion corrosion occurs on the walking beam support bearing; the accumulation of these progressive damages will eventually lead to equipment failure, resulting in unplanned shutdown of the oil well and economic losses. Summary of the Invention

[0003] The present invention provides a light-load shock absorber assembly for a pumping well, which is used to alleviate the problem that alternating loads generated in existing pumping operations cause unplanned shutdown of the oil well and result in economic losses.

[0004] A light-load shock absorber assembly for a pumping well, comprising:

[0005] A load hanging plate, wherein the load hanging plate is provided with a side groove for accommodating a polished rod, an anti-jump baffle is detachably connected to a position of the load hanging plate near the side groove, the load hanging plate is slidably connected to two symmetrically distributed support rods, and a locking piece for limiting the position of adjacent support rods is detachably connected to the load hanging plate near the support rods, the load hanging plate is provided with a load rope, and the two ends of the load rope are respectively passed around the adjacent support rods. The load hanging plate drives the polished rod to move and complete the oil pumping action through the square clamp, and the load hanging plate is provided with a shock absorbing component for alleviating alternating loads;

[0006] The shock-absorbing assembly includes: a support member, two shock-absorbing blocks and two connecting bolts. The support member is located on the upper side of the load hanging plate and contacts the square card. The two shock-absorbing blocks are symmetrically distributed between the support member and the load hanging plate. The connecting bolts pass through the support member and the adjacent shock-absorbing blocks and are threadedly connected to the load hanging plate.

[0007] Furthermore, a plurality of through holes distributed at equal intervals are provided in the shock absorbing block, so that the shock absorbing block can bend and deform.

[0008] Furthermore, both upper and lower sides of the through hole are arc-shaped surfaces.

[0009] Furthermore, on the symmetry plane of the two shock-absorbing blocks, the sum of the widths of the projections of all the through holes on the same shock-absorbing block is less than half the width of the projection of the shock-absorbing block, so as to limit the bending deformation range of the shock-absorbing block.

[0010] Furthermore, the number of the through holes corresponding to each of the shock absorbing blocks is an odd number, and the shock absorbing block is provided with inner protrusions whose number is one less than the number of the through holes, and the inner protrusions are located in the adjacent through holes except the through hole in the middle, and the shock absorbing block is provided with two symmetrically distributed outer protrusions, and the inner protrusions and the outer protrusions are both used to control the bending deformation direction of the shock absorbing block.

[0011] Furthermore, all the inner protrusions on the same shock-absorbing block are divided into two groups, and the two groups of inner protrusions are symmetrically distributed, and the inner protrusions have the same protruding direction as the outer protrusions on the same side of the shock-absorbing block.

[0012] Furthermore, the load-bearing rope is a non-metallic rope and has been treated with UV protection and waterproofing.

[0013] Furthermore, the support member is slidably connected to the load hanging plate through a connecting rod, the number of the connecting rods on the support member is not less than two, and the connecting bolts are located in adjacent connecting rods of the support member and slide.

[0014] Furthermore, the connecting bolt is provided with a plurality of circumferentially distributed limiting grooves, and an elastic folding piece is clamped at the connecting rod of the support member, and the elastic folding piece is used to limit the adjacent limiting grooves.

[0015] Furthermore, the connecting bolt is provided with a sliding groove and a threaded portion, and the sliding groove passes through the threaded portion of the connecting bolt.

[0016] The beneficial effects of adopting the above technical solution are: the present invention dissipates mechanical vibration energy through the elastic deformation of the shock-absorbing block, converts the originally rigid impact load transmission into a quasi-static gradual process, reduces the amplitude of the alternating stress, and reduces the peak impact force transmitted to components such as the sucker rod and the polished rod by suppressing the load change rate, thereby reducing the cumulative rate of fatigue damage to the equipment caused by the alternating load, thereby extending the equipment life and reducing the frequency of unplanned shutdowns of oil wells.

[0017] The middle part of the shock-absorbing block is divided into multiple rubber strips through the through hole, so that the shock-absorbing block exists in two stress-deformation states of compression and bending. The compression deformation of the shock-absorbing block is used to alleviate the alternating load during the up and down strokes. At the same time, the theoretical stroke length is maintained by the preset compression stiffness, thereby maintaining the oil pumping efficiency. The shock-absorbing block is induced to undergo bending deformation through the through-hole structure, thereby further dissipating energy when the load suddenly increases due to sand jamming and other reasons, further buffering the load applied to the polished rod by the donkey head, limiting the peak force transmitted to the polished rod, and reducing the damage to the polished rod caused by the sudden increase in load.

[0018] The inner and outer protrusions are used to enhance the local stiffness and geometric constraints of adjacent rubber strips on the shock-absorbing block, control the bending direction of the rubber strips on the shock-absorbing block when bending, reduce the probability of stress concentration caused by the rubber strips on the shock-absorbing block squeezing each other when bending, and reduce the probability of damage to the shock-absorbing block during bending deformation.

[0019] The connecting rod of the support is used to provide a "slide track" for the sliding of the support, so that the upper side of the load hanging plate can always remain parallel to the lower side of the support, preventing the shock-absorbing block from aging unevenly and causing the shock-absorbing block to have different thicknesses when subjected to force, causing the load hanging plate to tilt relative to the support, thereby reducing the probability of the load hanging plate tilting and causing the polished rod to wear or break. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the support member and the shock-absorbing block of the present invention.

[0022] Figure 3 It is a three-dimensional structural cross-sectional view of the load hanging plate and the support member of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the shock-absorbing block and the arc surface of the present invention.

[0024] Figure 5 It is a three-dimensional structural cross-sectional view of the shock-absorbing block of the present invention.

[0025] Figure 6It is a schematic diagram of the three-dimensional structure of the support member and the connecting bolts of the present invention.

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting bolt of the present invention.

[0027] Figure 8 It is a schematic diagram of the three-dimensional structure of the connecting bolt and the elastic flap of the present invention.

[0028] Markings in the accompanying drawings: 100- bare rod, 200- square card, 1- load hanging plate, 101- side groove, 2- anti-jump baffle, 3- support rod, 4- locking plate, 5- support member, 6- shock absorber block, 7- connecting bolt, 701- limiting groove, 702- sliding groove, 8- load rope, 9- through hole, 901- arc surface, 902- inner protrusion, 903- outer protrusion, 10- elastic fold. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] This embodiment discloses a lightweight load shock absorber assembly for a pumping well, which is used to alleviate the impact of alternating loads on the service life of equipment in existing pumping wells.

[0032] See also Figure 1-Figure 3 , a light load shock absorber assembly for an oil pumping well includes: a load hanging plate 1, the load hanging plate 1 is provided with a side groove 101 for accommodating a polished rod 100, and the position of the load hanging plate 1 near the side groove 101 is detachably connected to an anti-jump baffle 2 by bolts, and the anti-jump baffle 2 is used to limit the polished rod 100 in the side groove 101; the left and right sides of the load hanging plate 1 are slidably connected to support rods 3, and a slot is provided on the lower side of the support rod 3, and the left and right sides of the load hanging plate 1 are detachably connected to locking plates 4 by bolts, and the upper part of the locking plate 4 is located in the slot of the adjacent support rod 3. The load hanging plate 1 is provided with a load-bearing rope 8, and the two ends of the load rope 8 are respectively passed around the adjacent support rods 3; during the oil pumping process, the donkey head drives the load hanging plate 1 to move through the load rope 8, and the load hanging plate 1 drives the polished rod 100 to move through the square card 200 and completes the oil pumping action. A shock-absorbing component for alleviating alternating loads is provided on the load hanging plate 1.

[0033] See also Figure 2 and Figure 3The shock-absorbing assembly includes: a support member 5, two shock-absorbing blocks 6 and two connecting bolts 7. The support member 5 is located on the upper side of the load hanging plate 1 and contacts the lower side of the square card 200. The support member 5 is provided with a groove with a cross-section identical to the side groove 101; the two shock-absorbing blocks 6 are symmetrically distributed on the left and right and are both located between the support member 5 and the load hanging plate 1. The material of the shock-absorbing blocks 6 is high-rebound and fatigue-resistant polyurethane rubber; the connecting bolts 7 pass through the support member 5 and are slidably connected thereto, pass through the adjacent shock-absorbing blocks 6, and are threadedly connected to the load hanging plate 1.

[0034] The above arrangement can be achieved by fixing the support member 5 to the upper side of the load hanging plate 1 by the connecting bolts 7, so that the support member 5 can slide back and forth up and down relative to the load hanging plate 1; using the connecting bolts 7 and the support member 5 to apply an initial pre-tightening force to the shock-absorbing block 6, so that the shock-absorbing block 6 is in a compressed state before being put into use, so that the shock-absorbing block 6 can be compressed during the upstroke and can recover under the action of its own elasticity during the downstroke; during the oil pumping process, the elastic deformation of the shock-absorbing block 6 dissipates the mechanical vibration energy, and the originally rigid impact load transfer is converted into a quasi-static gradual process, so that the alternating stress amplitude is reduced, and by suppressing the load change rate, the impact force peak transmitted to the sucker rod, the light rod 100 and other components is reduced, thereby reducing the cumulative rate of fatigue damage to the equipment by the alternating load, thereby extending the equipment life and reducing the frequency of unplanned shutdowns of oil wells.

[0035] During the pumping process, the walking beam pumping unit starts and drives the pump head to move up and down. The pump head drives the load hanging plate 1 to move through the load rope 8. The load hanging plate 1 drives the shock absorber block 6 and the support member 5 to move. The support member 5 drives the polished rod 100 to move through the square card 200. The polished rod 100 drives the connected sucker rod string and the downhole plunger to move.

[0036] At the beginning of the upstroke, the movement direction of the donkey head changes from downward to upward, and transient pressure is generated between the load hanging plate 1 and the square card 200. The shock-absorbing block 6 is deformed under pressure, and the load rising rate is delayed through the viscoelastic hysteresis effect, thereby reducing the peak acceleration of the polished rod 100, attenuating the impact energy, and reducing the peak stress.

[0037] At the beginning of the downstroke, the movement direction of the donkey head changes from upward to downward. At this time, the viscous damping of the shock-absorbing block 6 continues to dissipate the residual vibration energy. The phase difference response between the square card 200 and the load hanging plate 1 is delayed through the deformation of the shock-absorbing block 6 (that is, the shock-absorbing block 6 recovers under the action of its own elastic force). Finally, the movement of the square card 200 and the load hanging plate 1 tends to be synchronized, the load mutation rate is delayed, and the acceleration peak is reduced. In this way, the dynamic load peak is clipped and the valley is flattened in the up and down strokes, the impact of the alternating load is alleviated, and the service life of the equipment is extended.

[0038] Example 2

[0039] This embodiment discloses a lightweight load shock absorber assembly for a pumping well, which provides a secondary buffering function based on the first embodiment.

[0040] See also Figure 3-Figure 5 Five through holes 9 are evenly distributed in the shock-absorbing block 6, and the upper and lower sides of the through holes 9 are both arc-shaped surfaces 901. On the symmetry plane of the two shock-absorbing blocks 6, the sum of the projected widths of all through holes 9 on the same shock-absorbing block 6 is less than half of the projected width of the shock-absorbing block 6.

[0041] The above arrangement can be achieved by dividing the middle part of the shock-absorbing block 6 into six rubber strips through the five through holes 9, so that the shock-absorbing block 6 has two stress-deformation states of compression and bending. The alternating load in the up and down stroke process is alleviated by the compression deformation of the shock-absorbing block 6, and the theoretical stroke length is maintained by the preset compression stiffness (that is, the height difference of the existing donkey head when it swings back and forth is equal to the moving distance of the light rod 100 in the up and down stroke. In this solution, the shock-absorbing block 6 has a thickness difference due to deformation in the up and down stroke, so that the height difference of the actual movement of the donkey head is equal to the sum of the actual moving distance of the light rod 100 and the thickness difference of the shock-absorbing block 6), thereby maintaining the oil pumping efficiency, and inducing the shock-absorbing block 6 to undergo bending deformation through the through hole 9 structure, and further dissipating energy when the load suddenly increases due to sand jamming and other reasons, exerting pressure on the donkey head. The load on the polished rod 100 is further buffered, the peak force transmitted to the polished rod 100 is limited, and the damage to the polished rod 100 caused by the sudden increase in load is reduced; at the same time, the geometric nonlinear stiffness characteristics generated by the bending deformation of the shock-absorbing block 6 achieve impact isolation while avoiding rigid blockage, ensuring that the polished rod 100 can still restore its normal motion trajectory after a sudden overload; the curved surface 901 makes the connection between the above-mentioned rubber strip and the shock-absorbing block 6 smooth, reducing the probability of the rubber strip bending and causing the connection between it and the shock-absorbing block 6 to tear; by limiting the width comparison between the through hole 9 and the shock-absorbing block 6, the thickness of the rubber strip on the shock-absorbing block 6 is made greater than the thickness of a single through hole 9, and then the bending amount of two adjacent rubber strips on the shock-absorbing block 6 is limited by contacting each other after bending, thereby reducing the probability of the rubber strip on the shock-absorbing block 6 to tear.

[0042] See also Figure 3-Figure 5 Four inner protrusions 902 are provided in the shock-absorbing block 6. The inner protrusions 902 are located in adjacent through holes 9 except the through hole 9 in the middle. External protrusions 903 are provided on both the front and rear sides of the shock-absorbing block 6. The four inner protrusions 902 on the same shock-absorbing block 6 are divided into two groups, and the two groups of inner protrusions 902 are symmetrically distributed front to back, and the inner protrusions 902 have the same protrusion direction as the outer protrusions 903 on the same side of the shock-absorbing block 6.

[0043] The above arrangement can be achieved by utilizing the inner protrusion 902 and the outer protrusion 903 to enhance the local stiffness and geometric constraints of the adjacent rubber strips on the shock-absorbing block 6, control the bending direction of the rubber strips on the shock-absorbing block 6 when bending, reduce the probability of stress concentration caused by the rubber strips on the shock-absorbing block 6 being squeezed against each other when bending, and reduce the probability of the shock-absorbing block 6 being damaged during the bending deformation process; by controlling the protruding directions of the inner protrusion 902 and the outer protrusion 903, the stress of the shock-absorbing block 6 in the front-to-back direction is made symmetrical, and at the same time, the impact energy is more evenly dispersed, reducing the overall displacement of the shock-absorbing block 6 after bending, and thereby making the structure of the shock-absorbing block 6 more stable.

[0044] During the normal oil pumping process, the shock absorber block 6 is compressed and deformed during the upstroke and recovers during the downstroke. During the upstroke, when the load suddenly increases due to sand jamming or other reasons, the suddenly increased load is applied to the shock absorber block 6 and exceeds its critical bending load (that is, the load when the shock absorber block 6 begins to bend, which can be determined and adjusted by factors such as the shape of the rubber strip on the shock absorber block 6, the elastic modulus of the shock absorber block 6, and the Poisson's ratio), the rubber strip on the shock absorber block 6 bends laterally and dissipates the impact energy, providing two-stage buffering until the downstroke, when the shock absorber block 6 recovers under the action of its own elasticity and waits for the next compression.

[0045] Example 3

[0046] This embodiment discloses a lightweight load shock absorber assembly for a pumping well, and further improves the load-bearing rope 8 based on the first embodiment.

[0047] See also Figure 1 The load-bearing rope 8 is a non-metallic rope. When used on site, a suitable material is selected according to the maximum load it needs to bear. Here, a special fiber material is selected and it has been treated with UV protection and waterproofing.

[0048] The above setting can be achieved by replacing the traditional steel wire rope with a load-bearing rope 8 made of a lightweight special fiber material, thereby enhancing the advantages of transportation and installation; and by processing the load-bearing rope 8, it can meet the requirements of long-term outdoor use environment.

[0049] Example 4

[0050] This embodiment discloses a lightweight load shock absorber assembly for a pumping well, which provides a function of reducing the probability of deflection of the load hanging plate 1 on the basis of the second embodiment.

[0051] See also Figure 2 、 Figure 3 and Figure 6 The support member 5 is slidably connected to the load hanging plate 1 through three connecting rods, and the three connecting rods on the support member 5 are distributed in a triangle, and the connecting bolts 7 are located in the adjacent connecting rods of the support member 5 and slide.

[0052] The above arrangement can be achieved by utilizing the connecting rod of the support member 5 to provide a "slide rail" for the sliding of the support member 5, so that the upper side of the load hanging plate 1 can always remain parallel to the lower side of the support member 5, thereby preventing the shock-absorbing block 6 from aging unevenly and causing the shock-absorbing block 6 to have different thicknesses when subjected to force, causing the load hanging plate 1 to tilt relative to the support member 5, thereby reducing the probability of the load hanging plate 1 tilting and causing the light rod 100 to wear or break.

[0053] Example 5

[0054] This embodiment discloses a light-load shock absorber assembly for a pumping well, which provides a function of reducing the probability of loosening of the connecting bolts 7 on the basis of the fourth embodiment.

[0055] See also Figure 6-Figure 8 The connecting bolt 7 is provided with a plurality of circumferentially distributed limiting grooves 701, and an elastic folding piece 10 is clamped at the connecting rod of the support member 5; the connecting bolt 7 is provided with a sliding groove 702 and a threaded portion, and the sliding groove 702 passes through the threaded portion of the connecting bolt 7.

[0056] The above setting can be achieved, after the connecting bolt 7 is installed, so that the elastic folding piece 10 is stuck in the adjacent limiting groove 701 to limit the rotation of the connecting bolt 7, thereby reducing the probability of the connecting bolt 7 loosening during the up and down movement of the support member 5, and improving the stability of the connection between the connecting bolt 7 and the load hanging plate 1; by providing a sliding groove 702 passing through the threaded portion on the connecting bolt 7, the collision between the elastic folding piece 10 and the threaded portion of the connecting bolt 7 is reduced, so that the elastic folding piece 10 can smoothly enter the adjacent limiting groove 701.

[0057] When installing the connecting bolt 7, the connecting bolt 7 is inserted into the corresponding connecting rod on the support 5. During this process, the connecting bolt 7 moves downward, causing the elastic folding piece 10 to move to the upper part of the connecting bolt 7 in the sliding groove 702. At this time, the threaded portion of the connecting bolt 7 corresponds to the corresponding position of the load hanging plate 1. The worker uses a tool to reach into the support 5 and rotate the connecting bolt 7, so that the threaded portion of the connecting bolt 7 is screwed into the load hanging plate 1. During the rotation of the connecting bolt 7, the elastic folding piece 10 is squeezed by the sliding groove 702, causing the elastic folding piece 10 to deform and lose contact with the sliding groove 702. As the connecting bolt 7 rotates, the elastic folding piece 1 0 corresponds to the adjacent limiting groove 701. At this time, the elastic folding piece 10 recovers under the action of its own elastic force and enters the adjacent limiting groove 701. In the subsequent rotation process of the connecting bolt 7, the elastic folding piece 10 contacts the limiting groove 701 and the sliding groove 702 in turn and recovers after reciprocating compression until the connecting bolt 7 is installed in place. The elastic folding piece 10 limits the connecting bolt 7 through the adjacent limiting groove 701. In the process of the support member 5 sliding up and down, the support member 5 drives the elastic folding piece 10 to slide along the adjacent limiting groove 701, keeping the elastic folding piece 10 limiting the connecting bolt 7, thereby reducing the probability of the connecting bolt 7 loosening.

[0058] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A light load shock absorber assembly for a pumping well, characterized in that: include: A load hanging plate (1), wherein the load hanging plate (1) is provided with a side groove (101) for accommodating a light rod (100), and the load hanging plate (1) is detachably connected to an anti-jump baffle (2) at a position close to the side groove (101), and the load hanging plate (1) is slidably connected to two symmetrically distributed support rods (3), and the load hanging plate (1) is detachably connected to a locking plate (4) for limiting the position of adjacent support rods (3) at a position close to the support rods (3), and the load hanging plate (1) is provided with a load rope (8), and both ends of the load rope (8) are respectively passed around the adjacent support rods (3), and the load hanging plate (1) drives the light rod (100) to move and complete the oil pumping action through the square card (200), and the load hanging plate (1) is provided with a shock absorbing component for alleviating alternating loads; The shock absorbing assembly comprises: a support member (5), two shock absorbing blocks (6) and two connecting bolts (7); the support member (5) is located on the upper side of the load hanging plate (1) and contacts the square clamp (200); the two shock absorbing blocks (6) are symmetrically distributed between the support member (5) and the load hanging plate (1); the connecting bolts (7) pass through the support member (5) and the adjacent shock absorbing blocks (6) and are then threadedly connected to the load hanging plate (1); A plurality of through holes (9) distributed at equal intervals are provided in the shock absorbing block (6), so that the shock absorbing block (6) can bend and deform; The upper and lower sides of the through hole (9) are both arc-shaped surfaces (901); On the symmetry plane of the two damping blocks (6), the sum of the projected widths of all the through holes (9) on the same damping block (6) is less than half the projected width of the damping block (6), so as to limit the bending deformation range of the damping block (6); The number of the through holes (9) corresponding to each of the shock absorbing blocks (6) is an odd number, the shock absorbing block (6) is provided with inner protrusions (902) whose number is one less than the number of the through holes (9), the inner protrusions (902) are located in the adjacent through holes (9) except the through hole (9) in the middle, the shock absorbing block (6) is provided with two symmetrically distributed outer protrusions (903), the inner protrusions (902) and the outer protrusions (903) are both used to control the bending deformation direction of the shock absorbing block (6); All the inner protrusions (902) on the same shock-absorbing block (6) are divided into two groups, and the two groups of inner protrusions (902) are symmetrically distributed, and the inner protrusions (902) and the outer protrusions (903) on the same side of the shock-absorbing block (6) have the same protruding direction.

2. The light-load shock absorber assembly for a pumping well according to claim 1, characterized in that: The carrying rope (8) is a non-metallic rope and has been treated to be UV-proof and waterproof.

3. The light-load shock absorber assembly for a pumping well according to claim 1, characterized in that: The support member (5) is slidably connected to the load hanging plate (1) via a connecting rod, the number of connecting rods on the support member (5) is not less than two, and the connecting bolt (7) is located in the connecting rod adjacent to the support member (5) and slides.

4. A light-load shock absorber assembly for a pumping well according to claim 3, characterized in that: The connecting bolt (7) is provided with a plurality of circumferentially distributed limiting grooves (701), and an elastic folding piece (10) is clamped at the connecting rod of the support member (5), and the elastic folding piece (10) is used to limit the adjacent limiting grooves (701).

5. The light-load shock absorber assembly for a pumping well according to claim 4, characterized in that: The connecting bolt (7) is provided with a sliding groove (702) and a threaded portion, and the sliding groove (702) passes through the threaded portion of the connecting bolt (7).

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