Adjustable spring retainer assembly for oilfield equipment

Abstract

The utility model discloses the adjustable spring retainer assembly of petroleum exploitation equipment, it includes base ring, elastic arm group, adjust force ring and locking member, the inner wall of base ring is equipped with the guide boss, and elastic arm group is by a plurality of elastic sheet with arch section, and the outer wall of adjust force ring is equipped with the helical groove of gradually changing depth and is slid with the guide boss, and locking member contains the positioning tooth disc and the compression cover plate with elastic dog. The application can realize the stepless regulation and reliable locking of elasticity.

Description

Technical Field

[0001] This utility model relates to the technical field of oil extraction equipment components, and in particular to an adjustable elastic spring retaining ring assembly for oil extraction equipment. Background Technology

[0002] Spring retaining ring assemblies are commonly used in oil extraction equipment to limit or provide elastic support for moving parts, playing a crucial role in downhole tools, packers, and safety valves. Spring retaining rings are typically made of elastic materials and achieve axial fixation or buffering of mating parts through a preset elastic force, requiring good stability and reliability under complex operating conditions.

[0003] Existing spring retaining rings mostly employ a fixed structure design, meaning their spring force is determined after manufacturing, making it difficult to adjust according to actual operating conditions. Under different well depths, temperatures, or pressures, the fixed spring force characteristics may lead to insufficient clamping force or overload, affecting equipment sealing performance or causing component wear. Furthermore, replacing retaining rings with different spring force specifications often requires disassembling the entire assembly, a time-consuming process that hinders rapid on-site maintenance and adaptive adjustments. Therefore, existing spring retaining rings have limitations in terms of spring force adjustability, making it difficult to meet the flexible application needs under diverse operating conditions. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustable elastic spring retaining ring assembly for oil extraction equipment, which solves the problems mentioned in the background art.

[0005] This invention is achieved through an adjustable elastic spring retaining ring assembly for oil extraction equipment.

[0006] It includes a base ring, a flexible arm assembly, a force adjusting ring, and a locking component, wherein:

[0007] The base ring is a closed ring structure. Its outer contour is adapted to the mounting groove of the component that needs to be limited in the oil extraction equipment. The inner wall is provided with continuously distributed guide ridges. The guide ridges extend in the circumferential direction and have a trapezoidal cross section, which are used to guide the elastic arm assembly to generate controllable displacement in the radial direction.

[0008] The elastic arm assembly is composed of multiple independent elastic plates, each elastic plate being evenly distributed circumferentially along the inner wall of the base ring. One end of each elastic plate is fixed to the inner wall of the base ring by riveting, while the other end is suspended and extends toward the central axis of the base ring. The central area of ​​the elastic plate is provided with an arc-shaped arched section. In its natural state, the arched section has a gap with the inner wall of the base ring. When subjected to external pressure, the arched section undergoes elastic deformation and adheres to the inner wall of the base ring, thereby changing the clamping force on the external mating parts.

[0009] The force adjusting ring is a rotating body coaxially sleeved inside the base ring. Its outer wall is provided with a spiral groove. The pitch of the groove is kept constant along the circumferential direction, and the depth increases linearly from one end to the other end. The side wall of the groove and the guide protrusion of the inner wall of the base ring form a sliding fit relationship. The axial movement of the force adjusting ring is driven by the external operating component.

[0010] The locking component is located on one end face of the base ring and includes a positioning toothed disc and a pressing cover plate. The positioning toothed disc is fixedly connected to the end face of the base ring and has a ring-shaped positioning toothed groove on its surface. The pressing cover plate is connected to the end face of the base ring by countersunk screws. The inner side of the pressing cover plate is provided with an elastic claw. After the pressing cover plate is tightened, the elastic claw is embedded in the positioning toothed groove to restrict the axial degree of freedom of the force adjusting ring.

[0011] Furthermore, each elastic plate in the elastic arm assembly is provided with a contact pad at its suspended end. The contact pad is made of wear-resistant alloy material and has a spherical structure on its outer surface. It forms point contact with the outer wall of the limited component, reducing frictional resistance while improving local stress bearing capacity.

[0012] Furthermore, one end of the force adjusting ring is provided with an operating handle seat, which protrudes from the outside of the base ring and has a hexagonal insertion hole for manual rotation with a standard wrench. The operating handle seat and the force adjusting ring are integrally formed and there is no relative rotation between them.

[0013] Furthermore, the inner wall of the base ring is provided with a pressure relief groove between the guide protrusions. The pressure relief groove extends through the thickness direction of the base ring and is used to release the fluid pressure accumulated in the elastic arm assembly under high pressure environment to prevent the elastic sheet from becoming unstable due to back pressure.

[0014] Furthermore, a spacer rib is provided between adjacent elastic plates in the elastic arm assembly. The two ends of the spacer rib are welded and fixed to the root area of ​​the adjacent elastic plates respectively. The height of the spacer rib is lower than the highest point of the arched section of the elastic plate, so as to ensure that each elastic plate deforms independently while maintaining the overall structural rigidity.

[0015] Furthermore, the spiral groove of the force adjusting ring is filled with a solid grease layer, which evenly covers the entire working stroke of the groove, reducing the sliding friction coefficient between the force adjusting ring and the guide protrusion and extending the service life of the component.

[0016] Furthermore, the outer wall of the base ring is provided with an annular sealing lip, which is molded from fluororubber material and has a semi-circular cross section. It fits tightly against the side wall of the mounting groove to prevent downhole mud or corrosive media from seeping into the interior of the base ring and affecting the operation of the elastic arm assembly.

[0017] Furthermore, the outer edge of the pressing cover plate is provided with an anti-rotation lug, which is inserted into the preset limiting notch on the end face of the base ring to ensure that the pressing cover plate does not shift circumferentially during the locking process and maintains the precise meshing state between the elastic claw and the positioning tooth groove.

[0018] Furthermore, the positioning grooves on the positioning toothed disc are distributed at equal angles along the circumference, the angle between the center lines of adjacent grooves is 15 degrees, and the groove depth gradually decreases from the opening to the bottom, forming a wedge-shaped locking structure to enhance locking stability.

[0019] Furthermore, the material of the elastic sheet is precipitation-hardening stainless steel strip, which is cold-rolled and then aged. Its yield strength is not less than 1,200 MPa, and it still maintains more than 95% of its initial elastic modulus at an ambient temperature of 200 degrees Celsius.

[0020] Furthermore, an axial limiting retaining ring is provided between the base ring and the force adjusting ring. The retaining ring is embedded in the annular groove on the inner wall of the base ring. The inner diameter of the retaining ring is slightly smaller than the maximum outer diameter of the force adjusting ring to prevent the force adjusting ring from leaving the working position under extreme vibration conditions.

[0021] Furthermore, a protective cover is provided on the outside of the operating handle seat. The cover is connected to the outer wall of the base ring through a snap-fit ​​structure. The inner cavity of the cover seat accommodates all the protruding parts of the operating handle seat, so as to avoid misoperation caused by collision with foreign objects during downhole operations.

[0022] Furthermore, at least one elastic plate in the elastic arm assembly has a strain-sensing marking area at the root region. The surface of the marking area is coated with a thermochromic coating. When the elastic plate is subjected to a load exceeding the design threshold, the coating color changes from green to red, providing a visual overload warning.

[0023] Furthermore, the base ring has a detection window at the position corresponding to the root of each elastic sheet. The window penetrates the inner and outer walls of the base ring, allowing external detection equipment to directly observe the deformation of the stress concentration area at the root of the elastic sheet.

[0024] Furthermore, a buffer washer is provided at the end of the force adjusting ring away from the operating handle seat. The washer is machined from polyetheretherketone material and has a thickness of three millimeters. It is located between the end face of the force adjusting ring and the step of the inner wall of the base ring to absorb axial impact loads and protect the integrity of the spiral groove structure.

[0025] Furthermore, the elastic claw in the locking component is formed by stamping beryllium bronze sheet, and its free end is provided with a barb structure. When there is no external force, the tip of the barb is 0.5 mm higher than the inner plane of the pressing cover plate, ensuring an interference fit with the positioning tooth groove.

[0026] Furthermore, in the installed state, the base ring has annular guide grooves on both axial end faces. The cross-section of the guide groove is rectangular, and the width is greater than one-tenth of the thickness of the base ring. These grooves are used to guide the downhole fluid to bypass the ring and reduce the direct scouring effect of the fluid on the retaining ring assembly.

[0027] This utility model provides an adjustable elastic spring retaining ring assembly for oil extraction equipment, which has the following beneficial effects:

[0028] This adjustable spring retaining ring assembly for oil extraction equipment utilizes the cooperation between the guide protrusions on the inner wall of the base ring and the spiral groove of the force adjusting ring. This allows the axial displacement of the force adjusting ring to be converted into a continuous change in the radial compression of the elastic arm assembly, thus achieving stepless adjustment of the elastic force value without replacing parts, adapting to the clamping force requirements of different working conditions. The elastic arm assembly adopts a split multi-piece structure, with each piece independently responding to local load changes, preventing the overall structure from failing due to local overload. The combination of the positioning toothed disc and elastic claw in the locking component provides mechanical position locking after adjustment, preventing the elastic force parameters from drifting under vibration. The design of the operating handle and hexagonal socket allows for on-site adjustment using general-purpose tools, shortening maintenance time. The pressure relief groove and sealing lip work together to ensure the reliability of the internal moving parts in harsh media environments. The setting of strain sensing marking area and detection window provides a visual basis for monitoring the equipment's operating status, improving preventive maintenance capabilities. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the installation of the base ring in this utility model;

[0031] Figure 3 This is an exploded view of the parts of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Base ring; 2. Elastic arm assembly; 3. Adjusting ring; 4. Locking component; 5. Guide ridge; 6. Elastic sheet; 7. Arc-shaped arched section; 8. Spiral groove; 9. Positioning toothed disc; 10. Pressing cover plate; 11. Positioning toothed groove; 12. Elastic claw; 13. Contact pad; 14. Operating handle seat; 15. Hexagonal insertion hole; 16. Pressure relief groove; 17. Spacer rib; 18. Solid grease layer; 19. Annular sealing lip; 20. Anti-rotation lug; 21. Limiting notch. Detailed Implementation

[0034] 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.

[0035] Please see Figures 1 to 3 This invention provides an adjustable elastic spring retaining ring assembly for oil extraction equipment. This assembly is suitable for elastically limiting and clamping rotating or axially moving parts in downhole operating environments, and is particularly suitable for conditions subjected to high temperature, high pressure, and corrosive media. The assembly achieves stepless on-site adjustment of the elastic force value through mechanical linkage, without disassembling the entire device or replacing parts, adapting to the differentiated clamping force requirements under different well depth conditions.

[0036] The base ring 1 is a closed ring structure, and its outer contour shape is consistent with the inner wall contour of the installation groove in the oil extraction equipment, ensuring a seamless circumferential fit after assembly. Guide ridges 5 are continuously distributed along the circumference of the inner wall of the base ring 1. The cross-section of the guide ridges 5 is trapezoidal, with the top width smaller than the bottom width, and the angle between the two inclined surfaces and the horizontal plane is 30 degrees. The height of the guide ridges 5 is 2.5 mm. A pressure relief groove 16 is provided between adjacent guide ridges 5. The pressure relief groove 16 penetrates the thickness direction of the base ring 1, has a width of 3 mm, and a depth equal to the thickness of the base ring 1. It is used to release the back pressure generated by fluid retention in the elastic arm assembly 2 under high pressure, preventing unexpected deformation or instability of the elastic sheet 6.

[0037] The elastic arm assembly 2 consists of twelve independent elastic plates 6, which are evenly distributed circumferentially along the inner wall of the base ring 1, with adjacent elastic plates 6 spaced 30 degrees apart. One end of each elastic plate 6 is fixedly connected to the inner wall of the base ring 1 by a rivet, with the rivet position located at the root area of ​​the elastic plate 6, 5 mm from the end face of the base ring 1. The other end of the elastic plate 6 is suspended and extends towards the central axis of the base ring 1, with a suspended section length of 25 mm. The middle area has an arc-shaped arched section 7, with the highest point of the arc-shaped arched section 7 being 4 mm away from the inner wall of the base ring 1. In its natural state, it does not contact the inner wall of the base ring 1. When external pressure is applied to the suspended end of the elastic plate 6, the arc-shaped arched section 7 elastically bends and gradually conforms to the inner wall of the base ring 1, thereby changing the degree of compression on the externally limited components.

[0038] Each elastic plate 6 has a contact pad 13 fixed to its suspended end face. The contact pad 13 is made of cobalt-based wear-resistant alloy material, cast and precision ground, with a spherical structure on the outer surface and a radius of curvature of eight millimeters. The center of the sphere is located on the center line of the suspended end of the elastic plate 6. The contact pad 13 forms point contact with the outer wall of the limited component, reducing the coefficient of sliding friction while dispersing local contact stress. A spacer rib 17 is provided between adjacent elastic plates 6. The two ends of the spacer rib 17 are welded to the outer side of the root area of ​​the adjacent elastic plates 6. The height of the spacer rib 17 is three and a half millimeters, which is 0.5 millimeters lower than the highest point of the arc-shaped arched section 7, ensuring that each elastic plate 6 maintains independent deformation capability under force, while maintaining the overall torsional stiffness of the elastic arm assembly 2.

[0039] The force adjusting ring 3 is a cylindrical rotating body coaxially sleeved inside the base ring 1. Its outer wall is machined with a spiral groove 8. The pitch of the spiral groove 8 is constant at 10 mm, and its depth linearly increases from 0.5 mm to 3.5 mm from one end of the force adjusting ring 3 to the other. The sidewall of the groove forms a sliding fit with the guide ridge 5 on the inner wall of the base ring 1. When the force adjusting ring 3 moves axially, the guide ridge 5 moves along the trajectory of the spiral groove 8, forcing radial displacement in the root region of the elastic plate 6, thereby changing the initial compression of the arc-shaped arched section 7 and achieving elastic force adjustment. The spiral groove 8 is filled with a solid grease layer 18, which covers the entire working surface of the groove. The grease layer 18 has a uniform thickness of 0.3 mm and is made of polytetrafluoroethylene composite solid lubricant, reducing the frictional resistance between the guide ridge 5 and the sidewall of the groove.

[0040] One end of the force adjusting ring 3 is equipped with an operating handle 14, which protrudes from the outer end face of the base ring 1 and is integrally forged with the force adjusting ring 3, with no relative rotation between them. The center of the end face of the operating handle 14 has a hexagonal insertion hole 15, with a side-to-side distance of 12 mm, suitable for inserting and rotating a standard hexagonal wrench. A protective cover is provided on the outer side of the operating handle 14, with its inner cavity completely accommodating the protruding part of the operating handle 14. The protective cover is connected to the outer wall of the base ring 1 via three snap-fit ​​structures, distributed at 120-degree intervals around the circumference of the protective cover. Each snap-fit ​​is made of elastic plastic and engages with a corresponding groove on the outer wall of the base ring 1 to prevent accidental operation due to collisions with foreign objects downhole.

[0041] A buffer washer is provided between the end face of the force adjusting ring 3 away from the operating handle seat 14 and the step on the inner wall of the base ring 1. The buffer washer is machined from polyetheretherketone material, with a thickness of three millimeters. Its outer diameter is the same as that of the force adjusting ring 3, and its inner diameter is slightly smaller than that of the force adjusting ring 3 by 0.5 millimeters. Under the axial impact load of the force adjusting ring 3, the buffer washer undergoes slight compression, absorbing instantaneous energy and protecting the structural integrity of the spiral groove 8. An axial limiting retaining ring is provided between the base ring 1 and the force adjusting ring 3. The axial limiting retaining ring is embedded in the annular groove on the inner wall of the base ring 1. The inner diameter of the retaining ring is 0.8 millimeters smaller than the maximum outer diameter of the force adjusting ring 3, preventing the force adjusting ring 3 from going out of its working stroke range under extreme vibration conditions.

[0042] The locking component 4 is located on one end face of the base ring 1 and includes a positioning gear 9 and a clamping cover plate 10. The positioning gear 9 is fixedly connected to the end face of the base ring 1 by countersunk screws. There are six countersunk screws, evenly distributed at 60 degrees along the circumference, with the screw heads recessed 0.5 mm below the end face of the positioning gear 9. The surface of the positioning gear 9 has 24 annularly distributed positioning grooves 11. The included angle between the center lines of adjacent grooves is 15 degrees. The groove depth gradually decreases from 1.2 mm to 0.8 mm from the opening to the bottom, forming a wedge-shaped cross-section to enhance meshing stability. The clamping cover plate 10 is connected to the end face of the base ring 1 by six countersunk screws. The inner side of the clamping cover plate 10 is provided with three elastic claws 12, which are evenly distributed along the circumference at 120 degrees. The elastic claws 12 are stamped from beryllium bronze sheets and have a barb structure at their free ends. When no external force is applied, the tip of the barb protrudes 0.5 mm above the inner plane of the clamping cover plate 10. After the clamping cover plate 10 is tightened, the barb structure is embedded in the positioning tooth groove 11 to form an interference fit, which restricts the axial degree of freedom of the force adjusting ring 3.

[0043] The outer edge of the clamping cover plate 10 is provided with anti-rotation lugs 20. There are two anti-rotation lugs 20, which are symmetrically distributed on the outer edge of the clamping cover plate 10. The anti-rotation lugs 20 are inserted into the preset limiting notches 21 on the end face of the base ring 1. The width of the limiting notches 21 is 0.2 mm larger than the width of the anti-rotation lugs 20, so as to ensure that the clamping cover plate 10 does not shift circumferentially during the locking process and maintains the precise meshing state between the elastic claws 12 and the positioning tooth grooves 11.

[0044] The outer wall of the base ring 1 is provided with an annular sealing lip 19. The annular sealing lip 19 is molded from fluororubber material and then vulcanized and fixed in the annular groove on the outer wall of the base ring 1. The cross-section is semi-circular with a radius of two millimeters. The outer edge of the annular sealing lip 19 forms an interference contact with the side wall of the mounting groove in the assembled state. The interference amount is 0.3 millimeters, which prevents downhole mud or corrosive media from seeping into the interior of the base ring 1 and affecting the operation of the elastic arm assembly 2. The base ring 1 is provided with annular guide grooves on both axial end faces. The cross-section of the annular guide groove is rectangular, with a width of four millimeters and a depth of two millimeters. The annular guide grooves guide the downhole fluid to bypass the outer wall of the base ring 1, reducing the direct scouring effect of the fluid on the retaining ring assembly.

[0045] At least one elastic plate 6 in the elastic arm assembly 2 has a strain-sensing marking area at its root. This marking area is located three millimeters outside the riveting point between the elastic plate 6 and the base ring 1. The surface of this marking area is coated with a thermochromic coating. The initial color of the coating is green, and when the elastic plate 6 is subjected to a load that causes the local temperature to exceed 80 degrees Celsius, the coating color changes to red, providing a visual overload warning. The base ring 1 has a detection window at the corresponding root position for each elastic plate 6. This window penetrates both the inner and outer walls of the base ring 1, with a width of five millimeters and a length of ten millimeters. This allows external testing equipment, such as an endoscope or laser displacement sensor, to directly observe the deformation of the stress concentration area at the root of the elastic plate 6, facilitating preventative maintenance.

[0046] The material of the elastic sheet 6 is precipitation-hardening stainless steel strip, grade 17-7PH. After cold rolling, it is subjected to aging treatment at 480 degrees Celsius for four hours. The yield strength is 1,250 MPa, and the elastic modulus retention rate is 96.3% at an ambient temperature of 200 degrees Celsius, which meets the mechanical performance requirements under high temperature conditions.

[0047] During assembly, first, each elastic piece 6 of the elastic arm assembly 2 is riveted to the inner wall of the base ring 1 in circumferential position. Then, the spacer rib 17 is welded to the outer side of the root of the adjacent elastic piece 6. Next, the force adjusting ring 3 is inserted from one end of the base ring 1 so that the guide ridge 5 is embedded in the spiral groove 8. Then, the axial limiting retaining ring is installed in the annular groove on the inner wall of the base ring 1. After that, the positioning toothed plate 9 is fixed to the end face of the base ring 1 by countersunk screws. Then, the clamping cover plate 10 is inserted and the countersunk screws are tightened so that the elastic claw 12 is embedded in the positioning toothed groove 11. Finally, the protective cover is installed on the outer wall of the base ring 1 to complete the overall assembly.

[0048] In use, this component is installed into the mounting slot of the oil extraction equipment, ensuring the annular sealing lip 19 fits tightly against the side wall of the mounting slot. The restrained component passes through the central hole of the base ring 1, and its outer wall makes point contact with the contact pad 13. Depending on the well depth, temperature, and pressure variations, a standard hex wrench is inserted into the hexagonal insertion hole 15 of the operating handle 14. The force adjusting ring 3 is rotated, causing the guide ridge 5 to slide along the spiral groove 8, pushing the root of the elastic plate 6 to generate radial displacement. This changes the pre-compression of the arc-shaped arched section 7, thereby adjusting the clamping force on the external restrained component. After adjustment, the clamping cover 10 is tightened, causing the barb structure of the elastic claw 12 to engage in the positioning tooth groove 11, locking the force adjusting ring 3 in its current position. If readjustment is required, the clamping cover 10 is loosened to release the lock, and the force adjusting ring 3 is rotated again.

[0049] During operation, the pressure relief channel 16 continuously releases the fluid pressure accumulated on the back of the elastic arm assembly 2, the solid grease layer 18 reduces frictional loss between the guide ridge 5 and the spiral groove 8, the buffer washer absorbs axial impact, and the annular guide channel guides the fluid to circulate, extending the service life of the components. The strain sensing marking area and detection window provide real-time status feedback for on-site maintenance personnel, facilitating timely detection of overload or fatigue damage signs and improving equipment operational safety.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable elastic spring retaining ring assembly for oil extraction equipment, characterized in that, It includes a base ring (1), an elastic arm assembly (2), a force adjusting ring (3), and a locking member (4), wherein: The base ring (1) is a closed ring structure, and its inner wall is provided with a guide ridge (5) extending in the circumferential direction. The guide ridge (5) has a trapezoidal cross section. The elastic arm assembly (2) is composed of multiple independent elastic plates (6). Each elastic plate (6) is evenly distributed along the inner wall of the base ring (1). One end is fixedly connected to the inner wall of the base ring (1), and the other end is suspended and extends towards the central axis of the base ring (1). The elastic plate (6) has an arc-shaped arched section (7) in the middle. In its natural state, there is a gap between the arc-shaped arched section (7) and the inner wall of the base ring (1). The force adjusting ring (3) is coaxially sleeved inside the base ring (1), and its outer wall is provided with a spiral groove (8). The depth of the spiral groove (8) increases linearly along the axial direction, and the guide ridge (5) slides in conjunction with the spiral groove (8). The locking member (4) is located on one end face of the base ring (1), including a positioning toothed disc (9) fixed to the end face of the base ring (1) and a pressing cover plate (10) connected by countersunk screws. The inner side of the pressing cover plate (10) is provided with an elastic claw (12), which is embedded in the positioning tooth groove (11) on the positioning toothed disc (9) to restrict the axial movement of the force adjusting ring (3).

2. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The elastic sheet (6) has a contact pad (13) at its suspended end, and the outer surface of the contact pad (13) is a spherical structure.

3. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The force adjusting ring (3) has an operating handle (14) at one end, and the operating handle (14) has a hexagonal insertion hole (15).

4. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The inner wall of the base ring (1) is provided with a pressure relief groove (16) between adjacent guide protrusions (5), and the pressure relief groove (16) penetrates the thickness direction of the base ring (1).

5. The adjustable elasticity spring retaining ring assembly for oil extraction equipment according to claim 1, characterized in that: A spacer rib (17) is provided between adjacent elastic sheets (6), and the two ends of the spacer rib (17) are welded and fixed to the root area of ​​the adjacent elastic sheets (6).

6. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The spiral groove (8) is filled with a layer of solid grease (18).

7. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The outer wall of the base ring (1) is provided with an annular sealing lip (19), which is molded from fluororubber material.

8. The adjustable elasticity oil extraction equipment spring retaining ring assembly according to claim 1, characterized in that: The outer edge of the pressing cover plate (10) is provided with an anti-rotation lug (20), which is inserted into the limiting notch (21) on the end face of the base ring (1).

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