Intelligent control hydraulic lifting oil extraction device

Abstract

The invention relates to the technical field of hydraulic lifters, and discloses an intelligent control hydraulic lifting oil extraction device which comprises an outer oil pipe and a small oil pipe penetrating through the middle of the outer oil pipe. A hydraulic cylinder barrel plunger, an oil well pump plunger, an oil well pump barrel, a traveling valve, a fixed valve and a filter screen pipe are sequentially arranged below the hydraulic cylinder barrel from top to bottom; the centralizer assembly is arranged between the outer oil pipe and the hydraulic cylinder barrel, the centralizer assembly comprises a supporting pipe fitting fixed between the outer oil pipe and the hydraulic cylinder barrel, a positioner is arranged at the connecting end of the supporting pipe fitting and the hydraulic cylinder barrel, and a telescopic rod piece is movably installed in the supporting pipe fitting. The hydraulic cylinder barrel can be centered and stably positioned through stress energy release of the hydraulic cylinder barrel in the power liquid input and oil extraction process, working deviation and use eccentric wear of the hydraulic cylinder barrel caused by external force potential energy are avoided, and the overall service life of the oil extraction device is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic lifters, in particular to an intelligently controlled hydraulic lift oil production device. Background Art

[0002] The hydraulic lift oil production device is a tool and means used for oil production in domestic directional wells, cluster wells, and horizontal wells. The existing oil production methods generally use two types of walking beam pumping unit systems and rodless pumping systems. Among them, the walking beam pumping unit system uses sucker rods for operation. In order to reduce the wear of the oil pipe during long-term pumping, a stabilizer for the oil rod and oil pipe is set simultaneously. The stabilizer is used to prevent the oil pipe and oil rod from being displaced due to working vibration and oil movement damping during the pumping process, which causes the frictional external force between the oil production components to increase, resulting in difficulty in oil production operations and friction damage to components.

[0003] However, the existing centralizers generally use ordinary rigid positioning devices for centralization to achieve the positioning of the oil pipe and the hydraulic cylinder. The hydraulic cylinder is centered inside the oil pipe and needs to maintain a vertical coaxial distribution with the other components to complete oil production. However, in actual use, the continuous use of the hydraulic cylinder will be pushed by the oil sludge damping during the oil production process, as well as the double force of the inner and outer walls during the power fluid input and oil sludge discharge, resulting in the hydraulic cylinder being continuously affected by external forces, resulting in reciprocating oscillations between itself and the connection of the centralizer. The centralizer is prone to loosening during use. At the same time, due to the influence of the external force oscillation on the hydraulic cylinder, the external force energy release effect generated by its work is poor, resulting in the hydraulic cylinder and the other components cannot maintain a good vertical coaxial distribution and stable use, which easily leads to local high friction damping at the stable fitting connection between the components. After long-term use, the problem of uneven wear will occur significantly, shortening the service life of the oil production device.

[0004] In view of the above problems, it is urgent to carry out innovative design based on the original hydraulic lift oil production device. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligently controlled hydraulic lifting oil production device to solve the problem that the existing hydraulic lifting oil production device proposed in the above background technology has a poor external force energy release effect during operation, which leads to the failure to maintain a good vertical coaxial distribution and stable use between the hydraulic cylinder and the remaining components, and easily leads to local high friction damping at the stable fitting connection between the components. After long-term use, the problem of eccentric wear will occur significantly, shortening the service life of the oil production device.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an intelligent controlled hydraulic lift oil production device, comprising:

[0007] The outer oil pipe and the small oil pipe passing through the middle thereof, the lower end of the small oil pipe is connected with a hydraulic cylinder barrel through a docking device, and a hydraulic cylinder barrel plunger, a sucker rod plunger, a sucker rod barrel, a traveling valve, a fixed valve and a filter screen pipe are successively arranged below the hydraulic cylinder barrel from top to bottom;

[0008] It further includes: a centralizer assembly arranged between the outer oil pipe and the hydraulic cylinder barrel, wherein the centralizer assembly includes a support pipe fitting fixed between the outer oil pipe and the hydraulic cylinder barrel, a positioner is arranged at the connection end of the support pipe fitting and the hydraulic cylinder barrel, and a telescopic rod fitting is movably installed inside the support pipe fitting, and the potential energy of the vibration of the centralizer assembly is realized by the telescopic movement of the telescopic rod fitting.

[0009] Preferably, a power fluid channel is reserved between the outer oil pipe and the small oil pipe, the docking device, the hydraulic cylinder barrel, the hydraulic cylinder barrel plunger and the sucker rod plunger, and the power fluid channel drives the hydraulic cylinder barrel plunger and the sucker rod plunger to rise; wherein the outer oil pipe, the docking device, the hydraulic cylinder barrel, the hydraulic cylinder barrel plunger and the sucker rod plunger are vertically coaxially arranged.

[0010] Preferably, the centralizer assemblies are evenly distributed at equal angles on the outer oil pipe, and two groups of upper and lower centralizer assemblies are arranged on the outer oil pipe;

[0011] The centralizer assembly and the support pipe fitting realize the centering positioning of the hydraulic cylinder barrel in the outer oil pipe.

[0012] Preferably, the centralizer assembly further includes an electromagnetic control assembly fixed therein, the electromagnetic control assembly is coaxially distributed with the telescopic rod fitting, and a buffer is arranged on the outer side of the electromagnetic control assembly facing the end of the telescopic rod fitting.

[0013] Preferably, the flow liquid cavity inside the support pipe fitting and the positioner is in a through fixed connection, a propulsion plug body is slidably installed in the flow liquid cavity, and there is oil liquid between the left side of the propulsion plug body in the flow liquid cavity and the upper end of the telescopic rod fitting inside the support pipe fitting.

[0014] Preferably, a neodymium magnet is fixed inside the flow liquid cavity, the neodymium magnet and the outer wall of the right side of the propulsion plug body are arranged in a magnetically repulsive manner, and a propulsion damping wheel is rotatably arranged inside the positioner at the same time, and the middle of the central axis of the propulsion damping wheel penetrates through the flow liquid cavity;

[0015] At the same time, driving blades are arranged on the outer wall of the central axis of the propulsion damping wheel located inside the flow liquid cavity.

[0016] Preferably, the propulsion plug body is arranged in an "I" - shaped structure, the propulsion plug body and the inner wall of the flow liquid cavity are in a sliding connection of fitting and sealing, and a one - way valve body is arranged on the right side of the propulsion plug body and on the flow liquid cavity.

[0017] Preferably, a positioning ring body is fixed on the outer wall of the connection part of the hydraulic cylinder barrel and the positioner, wherein the positioning ring body is coaxially arranged with the hydraulic cylinder barrel, and the positioning ring body and the positioner are in a through sliding positioning.

[0018] Preferably, sealing strips are arranged on both the left and right sides of the penetration part of the locator and the positioning ring body, and a damping rolling connection is provided between the arc-shaped outer wall of the positioning ring body and the propulsion damping wheel.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The intelligent control hydraulic lifting oil production device can achieve the centering and stable positioning of the hydraulic cylinder barrel by releasing the force on the hydraulic cylinder barrel during the input of power fluid and the oil production process, avoiding the working deviation and wear of the hydraulic cylinder barrel caused by external potential energy, and improving the overall service life of the oil production device. The specific content is as follows:

[0020] 1. While realizing the positioning of the hydraulic cylinder barrel through the support pipe fitting, the telescopic rod fitting installed inside the support pipe fitting in a telescopic manner releases kinetic energy load through its own telescopic movement when the hydraulic cylinder barrel is affected by external potential energy, maintaining the installation stability of the hydraulic cylinder barrel.

[0021] Furthermore, through the use of the electromagnetic control component and the buffer, during the oil production operation, the electromagnetic control component can control the active telescopic movement of the telescopic rod fitting, enabling the propulsion plug body inside the fluid circulation cavity to perform reciprocating motion. Under the driving action of the oil fluid, the propulsion damping wheel rotates, causing the hydraulic cylinder barrel to rotate under the damping external force, using rotational force unloading, and maintaining its centered orientation through the rotational external force. When subjected to local external damping, it can avoid continuous force on a single local position, resulting in deviation and wear, thereby preventing the hydraulic cylinder barrel from being worn due to local position deviation and making oil production difficult, and extending its service life.

[0022] 2. The use of the electromagnetic control component is intelligently controlled by circuit elements. It repeatedly generates different magnetic fields, driving the telescopic rod fitting to perform continuous reciprocating movement and also being able to remain relatively stationary. Through its continuous adsorption positioning of the telescopic rod fitting, the hydraulic cylinder barrel is maintained in a relatively stationary state during continuous operation, so that when a large damping effect occurs during oil production, static operation is used to reduce wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic front half-sectional structure view of the present invention;

[0024] Figure 2 It is a schematic front full-sectional structure view of the present invention;

[0025] Figure 3 It is an installation schematic view of the centralizer assembly of the present invention;

[0026] Figure 4 It is a schematic distribution structure view of the locator of the present invention;

[0027] Figure 5 It is a schematic installation structure view of the fluid circulation cavity of the present invention;

[0028] Figure 6 This is a schematic diagram of the connection structure between the support pipe fitting and the locator of the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of the fluid circulation cavity of the present invention;

[0030] Figure 8 This is a schematic diagram of the installation structure of the driving blade on the propulsion damping wheel of the present invention.

[0031] In the figure: 1. Outer oil pipe; 101. Power fluid channel; 2. Small oil pipe; 3. Docking device; 4. Hydraulic cylinder barrel; 5. Centralizer assembly; 501. Support pipe fitting; 502. Locator; 503. Telescopic rod member; 504. Electromagnetic control assembly; 505. Buffer member; 5051. Fluid circulation cavity; 5052. Propulsion plug body; 5053. Neodymium magnet; 5054. Propulsion damping wheel; 5055. Driving blade; 5056. Check valve body; 506. Positioning ring body; 507. Sealing strip; 6. Hydraulic cylinder barrel plunger; 7. Oil pump plunger; 8. Oil pump barrel; 9. Traveling valve; 10. Fixed valve; 11. Filter screen pipe; 12. Well flushing channel. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1: Please refer to Figures 1-8, the present invention provides a technical solution: an intelligent control hydraulic lifting oil production device, comprising: an outer oil pipe 1 and a small oil pipe 2 penetrating through the middle thereof. The lower end of the small oil pipe 2 is connected to a hydraulic cylinder barrel 4 through a docking device 3. Below the hydraulic cylinder barrel 4, there are successively arranged a hydraulic cylinder barrel plunger 6, a sucker rod plunger 7, a sucker rod barrel 8, a traveling valve 9, a standing valve 10, and a filter screen pipe 11 from top to bottom; there is a power fluid channel 101 reserved between the outer oil pipe 1 and the small oil pipe 2, the docking device 3, the hydraulic cylinder barrel 4, the hydraulic cylinder barrel plunger 6, and the sucker rod plunger 7. The power fluid channel 101 drives the hydraulic cylinder barrel plunger 6 and the sucker rod plunger 7 to rise; wherein the outer oil pipe 1, the docking device 3, the hydraulic cylinder barrel 4, the hydraulic cylinder barrel plunger 6, and the sucker rod plunger 7 are vertically coaxially arranged; in the above technical solution, the outer oil pipe 1 and the small oil pipe 2 are respectively connected to a multistage centrifugal pump, a reversing valve, and a reversing mechanism of the reversing valve in the outside world. During the upstroke state in the use process, the power fluid enters the bottom of the hydraulic cylinder barrel plunger 6 through the power fluid channel 101 between the outer oil pipe 1 and the small oil pipe 2, and pushes the hydraulic cylinder barrel plunger 6 to move. During this process, the traveling valve 9 is closed and the standing valve 10 is opened, and the fluid is discharged from the small oil pipe 2; in the downstroke state: the power fluid pushes the piston downward from the top of the hydraulic cylinder barrel plunger 6 through the small oil pipe 2, the traveling valve 9 is opened, the standing valve 10 is closed, and the produced fluid passes through the lower part of the sucker rod plunger 7 and enters the upper part of the sucker rod plunger 7 to resume operation and complete the oil production operation; further, a well flushing channel 12 is also provided in the solution. When flushing the well, when the traveling valve 9 of the sucker rod pump moves up to the upper part of the well flushing channel 12, the annulus formed by the outer oil pipe 1 and the small oil pipe 2 is communicated with the small oil pipe 2. At this time, the ground reversing valve stops reversing, and the power fluid continuously forms a circulating well flushing from the annulus formed by the outer oil pipe 1 and the small oil pipe 2, passing through the traveling valve 9 and passing through the small oil pipe 2. This is a conventional technical means of the prior art, only for use introduction and not for detailed description.

[0034] Further, a centralizer assembly 5 is arranged between the outer oil pipe 1 and the hydraulic cylinder barrel 4. The centralizer assembly 5 includes a support pipe fitting 501 fixed between the outer oil pipe 1 and the hydraulic cylinder barrel 4. A positioner 502 is provided at the connection end of the support pipe fitting 501 and the hydraulic cylinder barrel 4. An expansion rod member 503 is movably installed inside the support pipe fitting 501. The expansion and contraction movement of the expansion rod member 503 realizes the potential energy of the vibration of the centralizer assembly 5; the centralizer assemblies 5 are evenly distributed at equal angles on the outer oil pipe 1, and two groups of upper and lower centralizer assemblies 5 are arranged on the outer oil pipe 1; the centralizer assembly 5 and the support pipe fitting 501 realize the centering positioning of the hydraulic cylinder barrel 4 inside the outer oil pipe 1;

[0035] The central positioning of the hydraulic cylinder barrel 4 is carried out by using the centralizer assembly 5 and the supporting pipe fitting 501, preventing its deviation. At the same time, a telescopic rod member 503 is provided, and its telescopic movement can, under the control of an external force, realize the release of the oscillating external force for the positioning of the hydraulic cylinder barrel 4. The centralizer assembly 5 further includes an internally fixed electromagnetic control assembly 504, the electromagnetic control assembly 504 is coaxially distributed with the telescopic rod member 503, and a buffer member 505 is provided on the outer side of the electromagnetic control assembly 504 facing the end of the telescopic rod member 503; through the setting of the buffer member 505, it can prevent the telescopic rod member 503 from colliding with the electromagnetic control assembly 504 during the telescopic movement of the telescopic rod member 503. The electromagnetic control assembly 504 can generate magnetic forces with different durations, magnetic magnitudes, and different magnetic poles. When magnetic positioning occurs between the electromagnetic control assembly 504 and the telescopic rod member 503, the positioning and stillness of the telescopic rod member 503 can be realized, so as to utilize the superposition of the telescopic rod member 503 and the pipe fitting 501 to maintain the rigid reinforcement of the positioning of the hydraulic cylinder barrel 4; among them, the electromagnetic control assembly 504 is intelligently controlled by circuit elements and can be synchronously and intelligently controlled and used with external multi-stage centrifugal pumps, reversing valves, and the reversing mechanisms of reversing valves, etc.

[0036] In the above technical solution, the supporting pipe fitting 501 and the flow-through liquid cavity 5051 inside the positioner 502 are fixedly connected in a penetrating manner. A propulsion plug body 5052 is slidably installed inside the flow-through liquid cavity 5051. There is oil between the left side of the propulsion plug body 5052 inside the flow-through liquid cavity 5051 and the upper end of the telescopic rod member 503 inside the supporting pipe fitting 501; a neodymium magnet 5053 is fixed inside the flow-through liquid cavity 5051, and the neodymium magnet 5053 and the outer wall of the right side of the propulsion plug body 5052 are arranged with magnetic repulsion. At the same time, a propulsion damping wheel 5054 is rotatably arranged inside the positioner 502, and the middle of the central axis of the propulsion damping wheel 5054 penetrates through the flow-through liquid cavity 5051; at the same time, a driving blade 5055 is provided on the outer wall of the central axis of the propulsion damping wheel 5054 located inside the flow-through liquid cavity 5051; the propulsion plug body 5052 is arranged in an "I" - shaped structure, and the propulsion plug body 5052 is in sliding connection with the inner wall of the flow-through liquid cavity 5051 in a fitting and sealing manner, and a one-way valve body 5056 is provided on the right side of the propulsion plug body 5052 and on the flow-through liquid cavity 5051. The propulsion plug body 5052 controls the flow of the oil inside the flow-through liquid cavity 5051, and the flow of the oil causes the driving blade 5055 and the propulsion damping wheel 5054 to rotate and drive;

[0037] When using the electromagnetic control component 504 to control the reciprocating telescopic movement of the telescopic rod member 503 inside the support pipe member 501, the telescopic rod member 503 can apply an external force to the left side of the propulsion plug body 5052 through hydraulic oil, causing the entire propulsion plug body 5052 to move reciprocally. When the propulsion plug body 5052 moves reciprocally, the repulsive force between it and the neodymium magnet 5053 can facilitate its own reset. At the same time, the movement of the propulsion plug body 5052 causes the hydraulic oil inside the flow-through liquid cavity 5051 to flow continuously through the external force applied to its right side. During the flowing process, the power action drives the rotation of the propulsion damping wheel 5054 through the driving blade 5055. In this process, a one-way valve body 5056 is provided on the right side of the propulsion plug body 5052 and on the flow-through liquid cavity 5051, which can maintain the single direction of the movement of the hydraulic oil inside the flow-through liquid cavity 5051, avoid the crisscross of the movement direction of the hydraulic oil inside the flow-through liquid cavity 5051, and enable the propulsion damping wheel 5054 to rotate smoothly in a single direction. At the same time, the rotation control of the propulsion damping wheel 5054 with the flow-through liquid cavity 5051 and the positioner 502 can only rotate in one direction.

[0038] On the basis of the above technical solution, further, a positioning ring body 506 is fixed on the outer wall of the connection between the hydraulic cylinder barrel 4 and the positioner 502. The positioning ring body 506 is coaxially arranged with the hydraulic cylinder barrel 4, and the positioning ring body 506 and the positioner 502 are in a through-sliding positioning; sealing strips 507 are arranged on both the left and right sides of the through part of the positioner 502 and the positioning ring body 506. The arc-shaped outer wall of the positioning ring body 506 is in a damping rolling connection with the propulsion damping wheel 5054; so that during the rotation of the propulsion damping wheel 5054, the damping friction force is used to drive the hydraulic cylinder barrel 4 to rotate by the positioning ring body 506, and the kinetic energy is released by its rotation. Using the external force of the rotation, the hydraulic cylinder barrel 4 is kept in a continuously stable centered state, and vertical coaxial misalignment with other components will not occur during continuous application. At the same time, the eccentric wear of the hydraulic cylinder barrel 4 caused by misalignment is avoided. Moreover, during the rotation of the hydraulic cylinder barrel 4, when the hydraulic cylinder barrel 4 is used for a long time and the force on local positions is uneven with other components, the rotation is used to change the force application points, and due to the continuous centered positioning state of the hydraulic cylinder barrel 4 itself, the problem of eccentric wear and damage of the hydraulic cylinder barrel 4 during use is reduced, and the service life is extended.

[0039] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent control hydraulic lifting oil production device, comprising: An outer oil pipe (1) and a small oil pipe (2) passing through the middle thereof. The lower end of the small oil pipe (2) is connected to a hydraulic cylinder barrel (4) through a docking device (3). Below the hydraulic cylinder barrel (4), a hydraulic cylinder barrel plunger (6), a sucker rod pump plunger (7), a sucker rod pump barrel (8), a traveling valve (9), a fixed valve (10), and a filter screen pipe (11) are arranged in sequence from top to bottom; It is characterized in that it further comprises: A centralizer assembly (5) is arranged between the outer oil pipe (1) and the hydraulic cylinder barrel (4). The centralizer assembly (5) includes a support pipe fitting (501) fixed between the outer oil pipe (1) and the hydraulic cylinder barrel (4). A positioner (502) is provided at the connection end of the support pipe fitting (501) and the hydraulic cylinder barrel (4). An expansion rod member (503) is movably installed inside the support pipe fitting (501). The expansion and contraction movement of the expansion rod member (503) realizes the potential energy of the vibration of the centralizer assembly (5).

2. The intelligent control hydraulic lift oil production device according to claim 1, wherein: A power fluid channel (101) is reserved between the outer oil pipe (1) and the small oil pipe (2), the docking device (3), the hydraulic cylinder barrel (4), the hydraulic cylinder barrel plunger (6), and the sucker rod pump plunger (7). The power fluid channel (101) drives the hydraulic cylinder barrel plunger (6) and the sucker rod pump plunger (7) to rise; the outer oil pipe (1) is vertically coaxially arranged with the docking device (3), the hydraulic cylinder barrel (4), the hydraulic cylinder barrel plunger (6), and the sucker rod pump plunger (7).

3. An intelligent control hydraulic lift oil production device according to claim 1 or 2, characterized in that: The centralizer assemblies (5) are evenly distributed at equal angles on the outer oil pipe (1), and two sets of upper and lower centralizer assemblies (5) are arranged on the outer oil pipe (1); The centralizer assembly (5) and the support pipe fitting (501) realize the centering positioning of the hydraulic cylinder barrel (4) inside the outer oil pipe (1).

4. An intelligent control hydraulic lifting oil production device according to claim 3, characterized in that: The centralizer assembly (5) further includes an electromagnetic control assembly (504) fixed therein. The electromagnetic control assembly (504) is coaxially distributed with the expansion rod member (503). A buffer member (505) is provided on the outer side of the electromagnetic control assembly (504) facing the end of the expansion rod member (503).

5. The intelligent control hydraulic lift oil production device according to claim 4, characterized in that: The flow liquid cavity (5051) inside the support pipe fitting (501) and the positioner (502) is fixedly connected in a penetrating manner. A propulsion plug body (5052) is slidably installed in the flow liquid cavity (5051). There is oil between the left side of the propulsion plug body (5052) inside the flow liquid cavity (5051) and the upper end of the expansion rod member (503) inside the support pipe fitting (501).

6. The intelligent control hydraulic lift oil production device according to claim 5, characterized in that: A neodymium magnet (5053) is fixed inside the flow liquid cavity (5051). The neodymium magnet (5053) and the outer wall of the right side of the propulsion plug body (5052) are arranged in a magnetically repulsive manner. At the same time, a propulsion damping wheel (5054) is rotatably arranged inside the positioner (502). The middle part of the central axis of the propulsion damping wheel (5054) penetrates through the flow liquid cavity (5051); At the same time, a driving blade (5055) is provided on the outer wall of the central axis of the propulsion damping wheel (5054) located inside the flow liquid cavity (5051).

7. The intelligent control hydraulic lift oil production device according to claim 6, characterized in that: The propulsion plug body (5052) is arranged in an "I" - shaped structure. The propulsion plug body (5052) is in a sliding connection with the inner wall of the fluid - flowing cavity (5051) in a fitting and sealing manner. And a one - way valve body (5056) is provided on the right side of the propulsion plug body (5052) and on the fluid - flowing cavity (5051). The propulsion plug body (5052) controls the oil - fluid flow inside the fluid - flowing cavity (5051), and the oil - fluid flow makes the driving blade (5055) and the propulsion damping wheel (5054) rotate and drive.

8. An intelligent control hydraulic lifting oil production device according to claim 1 or 7, characterized in that: A positioning ring body (506) is fixed on the outer wall of the connection between the hydraulic cylinder barrel (4) and the positioner (502). Among them, the positioning ring body (506) is coaxially arranged with the hydraulic cylinder barrel (4), and the positioning ring body (506) is in a through - type sliding positioning with the positioner (502).

9. The intelligent control hydraulic lifting oil production device according to claim 8, characterized in that: Sealing strips (507) are arranged on both the left and right sides of the penetration between the positioner (502) and the positioning ring body (506). Among them, there is a damping - type rolling connection between the arc - shaped outer wall of the positioning ring body (506) and the propulsion damping wheel (5054).

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