Oil scraping anti-pollution device for sucker rod

Abstract

The invention belongs to the technical field of oil field downhole operation, and discloses a sucker rod oil scraping anti-pollution device which comprises a Christmas tree upper flange, a Christmas tree lower flange, a Christmas tree upper flange, a Christmas tree lower flange and a Christmas tree lower flange, mounting a jackscrew which is connected to the upper flange of the Christmas tree; the oil collecting barrel is connected with the upper flange of the Christmas tree through the mounting jackscrew; the oil scraping assembly comprises an installation disc, a triangular cover, an octagonal beef tendon oil scraping disc, beef tendon strips, a split type elastic contraction oil scraping rubber core and an annular rubber ring, gas pressure generated when a sucker rod moves can be effectively absorbed and buffered, gas in a cavity is stably guided out, the phenomenon of crude oil splashing is eradicated, meanwhile, large-area oil dirt stripping is achieved through the flexible beef tendon strips, and the oil scraping efficiency is improved. The upper layer split type elastic contraction oil scraping rubber core is matched with a dynamic pressing structure to scrape residual oil films, the oil scraping efficiency and the sealing performance are remarkably improved through double protection, the problem of pollution caused by oil contamination leakage is solved, and a reliable guarantee is provided for clean production of an oil field.

Description

Technical Field

[0001] The invention belongs to the technical field of oilfield downhole operations, and in particular relates to a sucker rod oil scraping and pollution prevention device. Background Art

[0002] During the pump inspection of an oil well, the first step is to pull out the sucker rod from the oil pipe. In order to wipe off the crude oil adhering to the sucker rod, a conventional oil scraper is usually installed on the well. The conventional oil scraper is a 3-5 cm thick annular rubber core that is placed on the sucker rod and then installed inside the scraper barrel to scrape the oil. During the pump inspection operation of an oil well, since the crude oil in the well is generally accompanied by natural gas, when the pump rod is pulled, the gas is quickly released to the wellhead due to pressure, which will "explode" the crude oil and splash around the wellhead, seriously contaminating the wellhead facilities and well repair equipment. The existing ordinary oil scraper device has a simple structure and no buffer structure in the cavity, which cannot release gas. At the same time, the oil wiping effect is poor and cannot effectively prevent pollution. Summary of the Invention

[0003] The present invention addresses the problems in the prior art of ordinary oil scraping devices having a simple structure, no buffer structure in the cavity, inability to release gas, poor oiling effect, and inability to effectively prevent pollution. The present invention proposes the following technical solutions: A sucker rod oil scraping and anti-pollution device comprises: a Christmas tree upper flange for sealing and covering the sucker rod; Install the jack screw and connect it to the upper flange of the Christmas tree; The oil collecting drum is connected to the flange on the Christmas tree through the mounting screws; The oil scraper assembly includes: a mounting plate, a triangular cover, an octagonal tendon oil scraper plate, tendon strips, a petal-type elastic shrink oil scraper rubber core and an annular rubber ring; The triangular cover is fixedly connected to the oil collecting barrel through a mounting plate, and the triangular cover is fixed to the tendon strips through an octagonal tendon oil scraping plate. The tendon strips are symmetrically arranged on the outside of the octagonal tendon oil scraping plate. The petal-type elastic shrinkable oil scraping rubber core is connected to the oil collecting barrel, and the annular rubber ring is connected to the petal-type elastic shrinkable oil scraping rubber core. A pressure cover connected to the oil collecting barrel and used for squeezing the petal-type elastic shrinkable oil scraping rubber core; The limiting pressing assembly is connected to the oil collecting barrel and is used for limiting the position of the sucker rod and pressing the petal-type elastic shrinkage oil scraping rubber core.

[0004] As a preferred embodiment of the above technical solution, the oil scraping assembly further includes: A screw rod is inserted into the mounting plate; A nut is connected to the screw rod, and the triangular cover is fixed to the mounting plate through the screw rod and the nut.

[0005] As a preferred embodiment of the above technical solution, the eight surfaces of the octagonal tendon oil scraper are symmetrically provided with inclined grooves, the tendon strips are located inside the inclined grooves, and two groups of tendon strips are provided between the opposite surfaces of the octagonal tendon oil scraper.

[0006] As a preferred embodiment of the above technical solution, the position limiting pressing assembly includes: a mounting strip connected to the oil collecting barrel; a round rod connected to the round rod via the mounting strip; A deflection rod, sleeved on the outside of the round rod; a pressing strip connected to the round rod through the deflection rod; a roller connected below the deflection rod; The extrusion structure is connected above the pressing strip.

[0007] As a preferred embodiment of the above technical solution, the position limiting pressing assembly further includes: a support bar connected to the oil collecting drum via the mounting bar; a limiting ring connected to the mounting bar through the support bar; An arc-shaped support rod connected below the limiting ring; A support ring connected to the limiting ring through the arc-shaped support rod; An elastic member is connected to the support ring and has one end surface affixed to the deflection rod.

[0008] As a preferred embodiment of the above technical solution, the extrusion structure includes: a linkage arm connected to the pressing strip; A push rod is connected to the linkage arm, and the linkage arm and the linkage arm are used to squeeze the petal-type elastic contraction oil scraping rubber core.

[0009] As a preferred embodiment of the above technical solution, an outlet is provided at the bottom outside the oil collecting barrel, an outlet pipe is provided inside the outlet, and a sealing ring is provided at the connection between the outlet pipe and the outlet for discharging objects inside the oil collecting barrel.

[0010] As a preferred embodiment of the above technical solution, the deflection rod is S-shaped, an inclined groove is provided on the outside of the roller, and the distance between the maximum outer diameter of the roller and the vertical line of the center of the oil collecting barrel is smaller than the closest distance between the deflection rod and the vertical line of the center of the oil collecting barrel.

[0011] The beneficial effects of the present invention are: (1) It can effectively absorb and buffer the gas pressure generated by the movement of the sucker rod, smoothly discharge the gas in the cavity, and prevent crude oil splashing. In addition, the device adopts a two-layer oil scraping mechanism: the lower octagonal tendon oil scraper plate realizes large-area oil stripping through flexible tendon strips, and the upper petal-type elastic shrinkage oil scraper rubber core cooperates with the dynamic pressing structure to scrape off the residual oil film. The double protection significantly improves the oil scraping efficiency and sealing performance, solves the problem of oil leakage pollution from the root, and provides reliable protection for clean production of oil fields; (2) Through the linkage of the roller, deflection rod and pressing structure, the device can respond to the size change of the sucker rod in real time, realize the dynamic and tight fit between the petal-type elastic shrinkage oil scraper rubber core and the sucker rod, and effectively avoid the oil leakage caused by pressure fluctuation or deformation of the sucker rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure shows a schematic structural diagram of a sucker rod oil scraping and anti-pollution device in Example 1; Figure 2 The figure shows a cross-sectional view of a sucker rod oil scraping and anti-pollution device in Example 1; Figure 3 The figure shows the installation structure diagram of the triangular cover in Example 1; Figure 4 The figure shows the installation structure diagram of the beef tendon strip in Example 1; Figure 5 The figure shows the structure of the annular rubber ring in Example 1; Figure 6 The figure shows a schematic diagram of the installation structure of the arc-shaped support rod in Example 1; Figure 7 The figure shows the installation structure diagram of the annular rubber core in Example 2.

[0013] In the figure: 1. Flange on the Christmas tree; 2. Mounting screw; 3. Oil collecting barrel; 41. Mounting plate; 42. Screw rod; 43. Nut; 44. Triangular cover; 45. Octagonal tendon oil scraper plate; 46. Tendon strip; 5. Petal-type elastic shrinkage oil scraper rubber core; 51. Annular rubber ring; 6. Pressure cover; 71. Mounting strip; 72. Round rod; 73. Support strip; 74. Limiting ring; 75. Arc-shaped support rod; 76. Support ring; 77. Elastic part; 78. Deflection rod; 79. Pressing strip; 710. Linkage arm; 711. Push rod; 712. Roller; 91. Liquid accumulation barrel; 92. Clamp head; 93. Base; 94. Annular rubber core; 95. Top cover. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Example 1

[0015] The present invention provides a sucker rod oil scraping and anti-pollution device, such as Figures 1 to 6 As shown, it includes: a Christmas tree flange 1, a mounting screw 2, an oil collecting barrel 3, an oil scraping assembly, a gland 6 and a limit pressing assembly. The Christmas tree flange 1 is used to seal and cover the sucker rod; the mounting screw 2 is connected to the Christmas tree flange 1; the oil collecting barrel 3 is connected to the Christmas tree flange 1 through the mounting screw 2; the oil scraping assembly includes: a mounting plate 41, a triangular cover 44, an octagonal tendon oil scraping plate 45, a tendon strip 46, a petal-type elastic shrinkage oil scraping rubber core 5 and an annular rubber ring 51; the triangular cover 44 is connected to the collecting barrel 6 through the mounting plate 41 The oil barrels 3 are fixedly connected, the triangular cover 44 is fixed to the tendon strips 46 through the octagonal tendon oil scraper plate 45, the tendon strips 46 are symmetrically arranged on the outside of the octagonal tendon oil scraper plate 45, the petal-type elastic shrinkage oil scraper rubber core 5 is connected to the oil collecting barrel 3, and the annular rubber ring 51 is connected to the petal-type elastic shrinkage oil scraper rubber core 5; the pressure cover 6 is connected to the oil collecting barrel 3, and is used to extrude the petal-type elastic shrinkage oil scraper rubber core 5; the limiting pressing assembly is connected to the oil collecting barrel 3, and is used to limit the sucker rod and press the petal-type elastic shrinkage oil scraper rubber core 5.

[0016] Traditional sucker rod scrapers, due to their simple structural design and lack of effective gas buffering and release mechanisms, prevent gas accumulated in the cavity from being discharged. This can easily cause crude oil to "explode" and splash under pressure, resulting in serious pollution to wellhead equipment and workover facilities. Furthermore, the single scraper structure makes it difficult to completely remove oil stains from the sucker rod surface, significantly reducing the anti-pollution effect. This device has successfully overcome the above technical bottlenecks by designing a multi-layer composite structure. The oil scraping assembly and the oil collecting barrel 3 form an integrated buffer cavity, which, together with the unique elastic deformation characteristics of the tendon strips 46 inside the octagonal tendon scraping plate 45, can effectively absorb and buffer the gas pressure generated during the movement of the sucker rod, and smoothly discharge the gas in the cavity to prevent crude oil splashing. In addition, the device adopts an upper and lower two-layer oil scraping mechanism: the lower octagonal tendon scraping plate 45 realizes large-area oil stripping through the tendon strips 46, and the upper petal-type elastic shrinkage scraping rubber core 5 cooperates with the dynamic pressing structure to scrape off the residual oil film. The double protection significantly improves the oil scraping efficiency and sealing performance, solves the problem of oil leakage pollution from the root, and provides reliable guarantee for clean production of oil fields.

[0017] When in use, multiple tendon strips 46 are wrapped around the octagonal tendon oil scraper plate 45 (the number is set to 4-8, specifically four in this application, and two tendon strips 46 form a group), and then the octagonal tendon oil scraper plate 45 is sleeved on the inside of multiple triangular covers 44, and then the octagonal tendon oil scraper plate 45 and the mounting plate 41 are fixed by the cooperation of the screw rod 42 and the nut 43, and then the oil collecting barrel 3 and the flange 1 on the oil production tree are fixed by installing the top screw 2, and then the petal-type elastic shrinkage oil scraper rubber core 5 and the annular rubber ring 51 are assembled, and after assembly, they are placed into the oil collecting barrel 3, and finally the pressure cover 6 is screwed on to assemble the device. At this time, the sucker rod passes through the multiple tendon strips 46 and the middle part of the petal-type elastic shrinkage oil scraper rubber core 5, and when the sucker rod moves, the multiple tendon strips 46 and the petal-type elastic shrinkage oil scraper rubber core 5 are used to clean the dirt on the surface.

[0018] Specifically, an oil collecting barrel 3 is sleeved on the top of the flange 1 on the oil tree, and an inclined groove is provided on the top of the outer surface of the flange 1 on the oil tree. The bottom of the outer surface of the oil collecting barrel 3 is symmetrically connected with a mounting screw 2 through a thread. An inclined angle is provided on the outer side of the mounting screw 2, and the inclined angle and the inclined groove fit together. A placement groove is provided inside the oil collecting barrel 3 at the top position of the outer surface of the flange 1 on the oil tree, and a sealing rubber is provided inside the placement groove to increase the sealing between the oil collecting barrel 3 and the flange 1 on the oil tree. At the same time, since the upper and lower spaces of the oil collecting barrel 3 are small, the inner cavity in the middle is large, and the lower part is trumpet-shaped, which fits the conical surface of the flange 1 on the oil tree, when gas flows in from below, the space in the inner cavity in the middle will suddenly expand, triggering the pressure relief effect. The oil collecting barrel 3 is provided with an outlet at the bottom outside, an outlet pipe is provided inside the outlet, and a sealing ring is provided at the connection between the outlet pipe and the outlet to increase the sealing performance. At the same time, the outlet pipe is used to discharge the objects (dirty oil and water) inside the oil collecting barrel 3. A mounting plate 41 is welded to the inner wall of the oil collecting barrel 3. A screw rod 42 is connected to the inside of the mounting plate 41. The outer surface of the screw rod 42 is located at the top and bottom of the mounting plate 41 and is connected to a nut 43 through a thread. The nut 43 is used to fix the screw rod 42 to prevent the position of the screw rod 42 from being offset. A triangular cover 44 is welded to the bottom of the screw rod 42. There are multiple triangular covers. The same octagonal tendon oil scraper plate 45 is sleeved between 44, and a tendon strip 46 is wound around the outside of the octagonal tendon oil scraper plate 45. The eight surfaces of the octagonal tendon oil scraper plate 45 are symmetrically provided with inclined grooves. The tendon strip 46 is located inside the inclined groove and is used to limit the tendon strip 46 to prevent the tendon strip 46 from being displaced. At the same time, since multiple groups of tendon strips 46 are fitted with the outside of the sucker rod (the sucker rod passes through the center points of multiple groups of rubber bands 46, resulting in multiple groups of tendon strips 46 being fitted with different points on the outside of the sucker rod, and multiple groups are used to make the outside of the sucker rod fully contact with the tendon strip 46), when the sucker rod moves, multiple groups of tendon strips 46 are used to clean the outside of the sucker rod, so that the sucker rod can be cleaned. Objects (oil stains) are cleared from the outside of the oil rod, and through the elasticity of multiple groups of tendon strips 46, the cleaning structure can be applied to sucker rods of different sizes. A petal-type elastic shrinkable oil scraper rubber core 5 is installed on the top of the inner wall of the oil collecting barrel 3. Three separation grooves are provided at the bottom of the petal-type elastic shrinkable oil scraper rubber core 5, so that three petals are formed at the bottom of the petal-type elastic shrinkable oil scraper rubber core 5. An annular rubber ring 51 is sleeved on the middle part of the outer surface of the petal-type elastic shrinkable oil scraper rubber core 5. The annular rubber ring 51 is used to limit and reset the outer side of the petal-type elastic shrinkable oil scraper rubber core 5. The top of the outer surface of the oil collecting barrel 3 is connected to a pressure cover 6 by a thread, and the top of the inner wall of the pressure cover 6 and the top of the petal-type elastic shrinkable oil scraper rubber core 5 fit together.

[0019] like Figure 2 and Figure 6As shown, the limiting pressing assembly includes: a mounting bar 71, a round rod 72, a support bar 73, a limiting ring 74, an arc-shaped support rod 75, a support ring 76, an elastic member 77, a deflection rod 78, a pressing bar 79, a linkage arm 710, a push rod 711 and a roller 712; the mounting bar 71 is connected to the oil collecting drum 3; the round rod 72 is connected to the round rod 72 through the mounting bar 71; the deflection rod 78 is sleeved on the outside of the round rod 72; the pressing bar 79 is connected to the round rod 72 through the deflection rod 78; the roller 712 is connected to the bottom of the deflection rod 78; the extrusion structure is connected to Above the pressing strip 79; the support strip 73 is connected to the oil collecting barrel 3 through the mounting strip 71; the limiting ring 74 is connected to the mounting strip 71 through the support strip 73; the arc-shaped support rod 75 is connected to the bottom of the limiting ring 74; the support ring 76 is connected to the limiting ring 74 through the arc-shaped support rod 75; the elastic member 77 is connected to the support ring 76 and one end face is attached to the deflection rod 78; the linkage arm 710 is connected to the pressing strip 79; the push rod 711 is connected to the linkage arm 710, and the linkage arm 710 and the linkage arm 710 are used to extrude the petal-type elastic shrinkage oil scraping rubber core 5.

[0020] During the reciprocating motion of the sucker rod, gas pressure is generated inside the oil collecting barrel 3 due to the movement of the sucker rod. The split-type elastic shrinkable oil scraper rubber core 5 is used for passive pressure relief. Although the gas in the cavity can be discharged, when the sucker rod changes size during the withdrawal process, a gap is easily formed between the split-type elastic shrinkable oil scraper rubber core 5 and the sucker rod, resulting in gas leakage. The cam 712 of the oil pump 711 is rotated by the spring 714 to rotate the spring 715 and the spring 716 to rotate the spring 717. The cam 712 of the oil pump 711 is rotated by the spring 714 to rotate the spring 717.

[0021] When in use, the tension of the elastic member 77 drives the deflection rod 78 to deflect outside the round rod 72. At this time, the bottom end of the deflection rod 78 drives the roller 712 to deflect, so that multiple rollers 712 converge, at this time causing the pressing strip 79 to separate from the petal-type elastic contraction oil scraping rubber core 5. At the same time, the linkage arm 710 drives the push rod 711 to press the outer top of the petal-type elastic contraction oil scraping rubber core 5, so that the petal-type elastic contraction oil scraping rubber core 5 is pressed and fixed. In the process of the push rod 711 and the petal-type elastic contraction oil scraping rubber core 5 being attached, the direct impact force between the elastic member 77 driving the push rod 711 and the oil collecting barrel 3 is reduced, thereby making the operation of the device more stable. When the size of the sucker rod changes, the deflection rod 78 drives the pressing strip 79 to dynamically adjust the angle through the roller 712. At this time, the pressing strip 79 approaches the outer side of the split-type elastic shrinkage oil scraper rubber core 5 and fits with it. At the same time, the push rod 711 is driven down under the action of the linkage arm 710, so that the extrusion force between the push rod 711 and the split-type elastic shrinkage oil scraper rubber core 5 is reduced. Since the pressing strip 79 applies pressure to the outer side of the split-type elastic shrinkage oil scraper rubber core 5, the inner side of the split-type elastic shrinkage oil scraper rubber core 5 fits with the outer side of the sucker rod, causing the split-type elastic shrinkage oil scraper rubber core 5 to be compressed, thereby causing the split-type elastic shrinkage oil scraper rubber core 5 to deform. During the deformation process, the split-type elastic shrinkage oil scraper rubber core 5 fits more tightly with the sucker rod, and the groove inside the outer side of the split-type elastic shrinkage oil scraper rubber core 5 is blocked due to the physical changes caused by the compression process.

[0022] The top of the support ring 76 is welded with four arc support rods 75, and the top of the four arc support rods 75 is welded with the same support ring 76. The top of the support ring 76 is embedded with three elastic members 77, which are supported and fixed by the arc support rods 75 and the support ring 76. The cross-section of the support ring 76 is triangular, and the elastic member 77 is installed on the inclined surface of the support ring 76, so that the elastic member 77 is in an inclined state with the ground, thereby facilitating the engagement of the driving end of the elastic member 77 with the deflection rod 78. The outer side of the round rod 72 is rotatably connected to the deflection rod 78, and the top of the deflection rod 78 is welded with a pressing strip 79. The top of the joint bar 79 is hingedly installed with a linkage arm 710, and the top of the linkage arm 710 is hingedly installed with a push rod 711. The outer side of the push rod 711 and the inner wall of the oil collecting barrel 3 are in contact with each other. A convex block is welded on the edge of the outer surface of the push rod 711. The convex block is slidably connected to the inside of the oil collecting barrel 3. A sliding groove is provided on the outer side of the corresponding convex block inside the oil collecting barrel 3. The shape of the deflection rod 78 is S-shaped, and an inclined groove is provided on the outer side of the roller 712. The distance between the maximum outer diameter of the roller 712 and the vertical line of the center of the oil collecting barrel 3 is smaller than the deflection rod The shortest distance between the bottom end of 78 and the center vertical line of the oil collecting barrel 3 prevents the deflection rod 78 from contacting the sucker rod when the roller 712 contacts the sucker rod, thereby causing the sucker rod to be unable to move due to the obstruction of the deflection rod 78. The movable end edge of the elastic member 77 is provided with a rounded corner, and the movable end of the elastic member 77 is in contact with the side of the deflection rod 78 close to the center vertical line of the oil collecting barrel 3, which facilitates the deflection of the deflection rod 78 and reduces the friction between the deflection rod 78 and the elastic member 77.

[0023] In the present application, the elastic member 77 belongs to an elastic linear motion structure, specifically a spring telescopic rod. Example 2

[0024] like Figure 7 As shown, the difference between this solution and Example 1 lies in the oil collecting barrel 3 and the oil scraping assembly. The oil scraping assembly includes a base 93, an annular rubber core 94 is clamped and installed inside the base 93, and a top cover 95 is connected to the outer surface of the base 93 at the top position of the annular rubber core 94 through a thread. A liquid accumulation barrel 91 is welded to the outside of the base 93, and the liquid accumulation barrel 91 is integrally formed with a clamp head 92. This method is suitable for sucker rods of the same diameter, and can maintain a stable sealing state for a long time, reduce the risk of wellhead pollution, ensure the safety of the oil production operation environment, and is easy to install and replace. In addition, the clamp head 92 is directly connected to the flange 1 on the oil production tree, which changes the connection method.

[0025] Working principle: In actual operation, the sucker rod is passed through the device so that its outer side is in contact with the roller 712. When the sucker rod makes reciprocating motion inside the device, gas pressure is generated in the oil collecting barrel 3 due to the movement of the sucker rod. At this time, the petal-type elastic contraction oil scraping rubber core 5 assumes the passive pressure relief function. If the size of the sucker rod changes, the roller 712 is in contact with the outer side of the sucker rod. When the outer size of the sucker rod changes, the roller 712 is driven to move. When the roller 712 moves, it drives the deflection rod 78 to drive the pressing strip 79 to dynamically adjust the angle. When the pressing strip 79 is close to the petal-type elastic contraction The outer side of the oil scraping rubber core 5 is fitted and completed. During this process, the pressing strip 79 synchronously drives the push rod 711 to descend through the linkage arm 710, reducing the extrusion force between it and the split-type elastic shrinkage oil scraping rubber core 5; at the same time, the pressing strip 79 applies pressure to the outer side of the split-type elastic shrinkage oil scraping rubber core 5, prompting the inner side of the split-type elastic shrinkage oil scraping rubber core 5 to fit the sucker rod, and generating deformation through compression, which not only makes the split-type elastic shrinkage oil scraping rubber core 5 fit more closely to the sucker rod, but also makes the outer side groove of the split-type elastic shrinkage oil scraping rubber core 5 form a blockage due to physical compression, effectively preventing gas leakage.

[0026] In addition, the sucker rod passes through the center points of multiple tendon strips 46. During the movement, the tendon strips 46 first perform preliminary oil cleaning on the outside of the sucker rod, and then the sucker rod enters the petal-type elastic shrinkage oil scraping rubber core 5 to complete secondary deep oil scraping and achieve double-layer purification. When the device is idle, the tension of the elastic member 77 drives the deflection rod 78 to deflect around the round rod 72, driving the roller 712 to converge, and at the same time the linkage arm 710 pulls the push rod 711 to press down the top of the outer side of the rubber core, firmly pressing and fixing the petal-type elastic shrinkage oil scraping rubber core 5 to ensure that the device is in a safe standby state.

[0027] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same.

Claims

1. A sucker rod oil scraping and anti-pollution device, characterized in that: include: The Christmas tree upper flange (1) is used for sealing and covering the sucker rod; Install the top screw (2) and connect it to the upper flange (1) of the Christmas tree; An oil collecting barrel (3) is connected to the upper flange (1) of the Christmas tree via the mounting screw (2); The oil scraping assembly comprises: a mounting plate (41), a triangular cover (44), an octagonal tendon oil scraping plate (45), a tendon strip (46), a petal-type elastic shrinkage oil scraping rubber core (5) and an annular rubber ring (51); The triangular cover (44) is fixedly connected to the oil collecting barrel (3) through the mounting plate (41), the triangular cover (44) is fixed to the tendon strip (46) through the octagonal tendon oil scraping plate (45), the tendon strip (46) is symmetrically arranged on the outside of the octagonal tendon oil scraping plate (45), the petal-type elastic shrinkable oil scraping rubber core (5) is connected to the oil collecting barrel (3), and the annular rubber ring (51) is connected to the petal-type elastic shrinkable oil scraping rubber core (5); A pressure cover (6) is connected to the oil collecting barrel (3) and is used to squeeze the petal-type elastic shrinkable oil scraping rubber core (5); A position limiting and pressing assembly is connected to the oil collecting barrel (3) and is used for limiting the position of the sucker rod and pressing the petal-type elastic shrinkage oil scraping rubber core (5).

2. The sucker rod oil scraping and anti-pollution device according to claim 1, characterized in that: The oil scraping assembly also includes: A screw rod (42) is inserted into the mounting plate (41); The nut (43) is connected to the screw rod (42), and the triangular cover (44) is fixed to the mounting plate (41) through the screw rod (42) and the nut (43).

3. The sucker rod oil scraping and anti-pollution device according to claim 1, characterized in that: The eight surfaces of the octagonal tendon oil scraping plate (45) are symmetrically provided with inclined grooves, the tendon strips (46) are located inside the inclined grooves, and two groups of tendon strips (46) are provided between the opposite surfaces of the octagonal tendon oil scraping plate (45).

4. The sucker rod oil scraping and anti-pollution device according to claim 1, characterized in that: The position limiting pressing assembly includes: A mounting bar (71) connected to the oil collecting barrel (3); A round rod (72) connected to the round rod (72) via the mounting strip (71); A deflection rod (78) is sleeved on the outside of the round rod (72); A pressing strip (79) connected to the round rod (72) via the deflection rod (78); A roller (712) connected below the deflection rod (78); An extrusion structure is connected above the pressing strip (79).

5. The sucker rod oil scraping and anti-pollution device according to claim 4, characterized in that: The position limiting pressing assembly further includes: A support bar (73) connected to the oil collecting barrel (3) via the mounting bar (71); A limiting ring (74) connected to the mounting bar (71) via the support bar (73); An arc-shaped support rod (75) connected below the limiting ring (74); A support ring (76) connected to the limiting ring (74) via the arc-shaped support rod (75); An elastic member (77) is connected to the support ring (76) and has one end surface affixed to the deflection rod (78).

6. The sucker rod oil scraping and anti-pollution device according to claim 4, characterized in that: The extrusion structure comprises: A linkage arm (710) connected to the pressing strip (79); The push rod (711) is connected to the linkage arm (710), and the linkage arm (710) and the linkage arm (710) are used to squeeze the petal-type elastic contraction oil scraping rubber core (5).

7. The sucker rod oil scraping and anti-pollution device according to claim 1, characterized in that: An outlet is provided at the bottom of the outer side of the oil collecting barrel (3), an outlet pipe is provided inside the outlet, and a sealing ring is provided at the connection between the outlet pipe and the outlet for discharging objects inside the oil collecting barrel (3).

8. The sucker rod oil scraping and anti-pollution device according to claim 4, characterized in that: The deflection rod (78) is S-shaped, an inclined groove is provided on the outside of the roller (712), and the distance between the maximum outer diameter of the roller (712) and the vertical center line of the oil collecting barrel (3) is smaller than the closest distance between the deflection rod (78) and the vertical center line of the oil collecting barrel (3).

9. The sucker rod oil scraping and anti-pollution device according to claim 5, characterized in that: The movable end edge of the elastic member (77) is provided with a rounded corner, and the movable end of the elastic member (77) is in contact with a side of the deflection rod (78) close to the vertical line of the center of the oil collecting barrel (3).

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