Pumping unit polish rod sealer with dynamic deviation correction function

Abstract

The invention discloses a pumping unit polish rod sealer with a dynamic deviation rectifying function, and relates to the technical field of polish rod sealers. The pumping unit polish rod sealer comprises a base body, and a deviation rectifying assembly is arranged on the base body; the deviation rectifying assembly comprises a lower packing box, a fluororubber U-shaped ring, an inner nut, an inner pressing ring and an outer pressing ring. By installing the deviation correcting assembly, dynamic and reasonable deviation adjusting of the sealer structure is achieved, the problem of unreasonable abrasion between a packing and the polish rod of the oil pumping unit is solved, oil leakage caused by eccentric abrasion caused by vibration of the polish rod, straightness errors of the polish rod, inclination of the sealer and the like is eliminated, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of polished rod sealers, and particularly to a polished rod sealer for pumping units with a dynamic deviation correction function. Background Art

[0002] The pumping unit lifts crude oil through the reciprocating motion of the polished rod, and the wellhead sealer avoids the leakage of oil, gas and water in the dynamic environment through multiple layers of packing. However, due to the tens of thousands of frequent reciprocating motions that the polished rod of the pumping unit has to bear every day, combined with the diversity and complexity of the wellhead environment, over time, the sealing effect of the traditional sealer gradually weakens, resulting in a significant increase in the risk of crude oil leakage.

[0003] During the actual operation of the traditional polished rod sealer of the pumping unit, unnecessary eccentric wear often occurs between the polished rod and the packing due to factors such as polished rod vibration, straightness error, wellbore trajectory deviation, and tilting of the sealer itself. The eccentric wear forms a gap between the polished rod and the packing, which in turn leads to crude oil leakage, reduces the oil production efficiency, and increases the maintenance cost and potential safety hazards.

[0004] Patent CN115324516B discloses a polished rod sealer with airbag compensation for pumping units. The above patent enhances the sealing performance between the packing and the polished rod, improves the lubrication between the packing and the polished rod, reduces the wear of the packing, and extends its service life.

[0005] The above patent improves the contact sealing performance between the packing and the polished rod, and solves the problem that the movement and wear of the polished rod affect the sealing performance between the two. However, there is still room for optimization in terms of the wear between the polished rod and the packing of the pumping unit. The present application solves the problem of unreasonable wear between the packing and the polished rod through the dynamic adjustment of the sealer structure.

[0006] Therefore, the present application proposes a polished rod sealer for pumping units with a dynamic deviation correction function that realizes the dynamic and reasonable adjustment of the sealer structure. Summary of the Invention

[0007] The purpose of the present invention is to provide a polished rod sealer for pumping units with a dynamic deviation correction function, so as to solve the technical problem of unreasonable wear between the packing and the polished rod proposed in the above background art.

[0008] To achieve the above purpose, the present invention provides the following technical solution: A polished rod sealer for pumping units with a dynamic deviation correction function, including a base body, and a deviation correction component is arranged on the base body; The deviation correction component includes: a lower packing box, a fluororubber U-ring, an inner nut, an inner pressure ring, and an outer pressure ring; The outer wall of the base body is threadedly connected with a large gland. The large gland is movably sleeved on the outer wall of the outer pressure ring. The outer pressure ring is movably sleeved on the outer wall of the fluororubber U-ring. The inner wall of the base body is movably sleeved with a lower packing box. The outer wall of the lower packing box is movably sleeved with an inner pressure ring. The fluororubber U-ring is in contact with the inner pressure ring. The outer wall of the lower packing box is threadedly connected with an inner nut. The inner wall of the lower packing box is movably installed with a packing ring. The packing ring is movably sleeved on the polished rod of the pumping unit rod. The top of the outer wall of the lower packing box is threadedly connected with an upper packing box.

[0009] Preferably, a sealing assembly is provided on the outer pressure ring. When repairing and replacing the seal components, the sealing assembly closes the passage between the lower and upper parts of the polished rod of the pumping unit rod. The sealing assembly includes: a rotating handwheel, a threaded sleeve, a push rod, a pressing plug and a sealing fluororubber plug. Installation cylinders are symmetrically and fixedly connected to the base body. The inner wall of the installation cylinder is movably installed with a sealing fluororubber plug. The sealing fluororubber plug is in contact with the polished rod of the pumping unit rod. A pressing plug is fixedly installed inside the sealing fluororubber plug. The pressing plug is movably sleeved on the outer wall of the push rod. A push shaft is fixedly connected to the side wall of the push rod. The outer wall of the push shaft is threadedly connected with a threaded sleeve. A rotating handwheel is fixedly connected to the side wall of the threaded sleeve.

[0010] Preferably, a braking assembly is provided on the base body. When installing the seal components, the braking assembly stops the lower packing box. The braking assembly includes: a braking pin. The base body is threadedly connected to the outer wall of the braking pin. A braking notch is provided on the side wall of the lower packing box. The braking notch is movably sleeved on the outer wall of the braking pin.

[0011] Preferably, a filling assembly is provided on the upper packing box. The filling assembly is used for replenishing the sealing material in the upper packing box. The filling assembly includes: a glue injection gun seat and a feed hole. Glue injection gun seats are symmetrically provided on the outer wall of the upper packing box. The two glue injection gun seats are fixedly connected by bolts. Feed holes are symmetrically provided on the outer wall of the upper packing box. A filling groove is provided on the side wall of the glue injection gun seat. A filling hole is provided on the side wall of the glue injection gun seat. The filling hole communicates with the filling groove. The filling hole is aligned with the feed hole. The filling hole communicates with the feed hole.

[0012] Preferably, the top of the outer wall of the upper packing box is threadedly connected with an upper gland. The upper packing box is movably sleeved on the outer wall of the upper guide sleeve. The upper guide sleeve is movably sleeved on the outer wall of the polished rod of the pumping unit rod. The upper guide sleeve is in contact with the packing ring. The outer wall of the polished rod of the pumping unit rod is movably sleeved with a lower guide sleeve. The lower guide sleeve is in contact with the packing ring. The outer wall of the lower guide sleeve is movably sleeved with a lower packing box. A deviation correction groove is provided on the top of the outer wall of the large gland. The lower packing box is arranged in the deviation correction groove.

[0013] Preferably, the installation cylinder is connected with a guiding and sealing sleeve through bolts. The guiding and sealing sleeve is movably sleeved on the outer wall of the propulsion shaft. A guiding gland is arranged on the side wall of the guiding and sealing sleeve. The guiding gland is movably sleeved on the outer wall of the fixing bolt, and the outer wall of the fixing bolt is movably sleeved with the installation cylinder.

[0014] Preferably, the guiding and sealing sleeve is movably sleeved on the outer wall of the stop pin. The stop pin is in contact with the propulsion shaft. A stop mother block is fixedly connected to the side wall of the extrusion plug. The stop mother block is movably sleeved on the outer wall of the propulsion rod.

[0015] Preferably, a limiting block is fixedly connected to the side wall of the propulsion shaft. The guiding and sealing sleeve is movably sleeved on the outer wall of the limiting block. A limiting groove is formed in the guiding and sealing sleeve, and the limiting groove is movably sleeved on the outer wall of the limiting block.

[0016] Preferably, the number of the packing rings is 10, and the upper stuffing box is movably sleeved on the outer wall of the packing rings.

[0017] Preferably, the bottom of the fluororubber U-shaped ring is in contact with the base body, the bottom of the fluororubber U-shaped ring is in contact with the lower stuffing box, and the bottom of the inner nut is in contact with the inner pressing ring.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By installing a deviation rectifying component, the present invention realizes the dynamic and reasonable deviation adjustment of the seal structure, solves the problem of unreasonable wear between the packing and the polished rod of the pumping unit, eliminates the problems of polished rod vibration, straightness error of the polished rod, and inclination of the seal, which cause eccentric wear and form gaps for oil leakage, and prolongs the service life of the equipment; 2. By installing a sealing component, the present invention realizes the prevention of blowout during the maintenance and replacement of the seal, solves the problem of crude oil leakage during the maintenance of the seal components, improves the safety during the maintenance of the device, and ensures the sealing performance of the seal; 3. By installing a braking component, the present invention realizes the stop during the assembly of the seal, and realizes the stop of the lower stuffing box in the base body through the braking pin, ensures the sealing effect between the components of the seal, and ensures the accuracy of the installation of the components of the seal; 4. By installing a feeding component, the present invention realizes the injection of sealing materials without cutting off the well pressure and without stopping the machine, solves the problem that the packing rings of the seal need to be frequently replaced, reduces the downtime for maintenance, and improves the oil production efficiency of the pumping unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the inner nut of the present invention; Figure 2 It is a front view structural schematic diagram of the present invention; Figure 3 It is a sectional structural schematic diagram of the present invention; Figure 4Schematic diagram of the deviation rectification component of the present invention; Figure 5 Schematic diagram of the sealing component of the present invention; Figure 6 Schematic diagram of the injection component of the present invention; Figure 7 Cross-sectional structure schematic diagram of the glue injection gun seat of the present invention; Figure 8 Cross-sectional structure schematic diagram of the guiding and sealing sleeve of the present invention.

[0020] In the figure: 1. Upper gland; 2. Upper guiding sleeve; 3. Upper stuffing box; 4. Packing ring; 5. Glue injection gun seat; 6. Lower guiding sleeve; 7. Large gland; 8. Lower stuffing box; 9. Base body; 10. Polished rod of pumping unit rod; 11. Deviation rectification groove; 12. Outer pressure ring; 13. Fluoroelastomer U-ring; 14. Inner nut; 15. Inner pressure ring; 16. Rotating handwheel; 17. Brake pin; 18. Brake notch; 19. Injection groove; 20. Injection hole; 21. Feed hole; 22. Threaded sleeve; 23. Guiding gland; 24. Fixed bolt; 25. Pushing rod; 26. Guiding and sealing sleeve; 27. Installation cylinder; 28. Stop pin; 29. Extrusion plug; 30. Sealing fluoroelastomer plug; 31. Stop mother block; 32. Pushing shaft; 33. Limiting block; 34. Limiting groove. Detailed implementation manners

[0021] 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.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a polished rod seal for a pumping unit with a dynamic deviation correction function, including a base body 9, and a deviation correction component is arranged on the base body 9; the deviation correction component includes: a lower packing box 8, an outer pressure ring 12, a fluororubber U-ring 13, an inner nut 14, and an inner pressure ring 15; the outer wall of the base body 9 is threadedly connected with a large pressure cover 7, the large pressure cover 7 is movably sleeved on the outer wall of the outer pressure ring 12, the outer pressure ring 12 is movably sleeved on the outer wall of the fluororubber U-ring 13, the inner wall of the base body 9 is movably sleeved with the lower packing box 8, the outer wall of the lower packing box 8 is movably sleeved with the inner pressure ring 15, the fluororubber U-ring 13 is in contact with the inner pressure ring 15, the outer wall of the lower packing box 8 is threadedly connected with the inner nut 14, a packing ring 4 is movably installed inside the lower packing box 8, the packing ring 4 is movably sleeved on the outer wall of the polished rod 10 of the pumping unit, and the top of the outer wall of the lower packing box 8 is threadedly connected with an upper packing box 3; The top of the outer wall of the upper packing box 3 is threadedly connected with an upper pressure cover 1, the upper packing box 3 is movably sleeved on the outer wall of the upper guide sleeve 2, the upper guide sleeve 2 is movably sleeved on the outer wall of the polished rod 10 of the pumping unit, the upper guide sleeve 2 is in contact with the packing ring 4, the outer wall of the polished rod 10 of the pumping unit is movably sleeved with a lower guide sleeve 6, the lower guide sleeve 6 is in contact with the packing ring 4, the outer wall of the lower guide sleeve 6 is movably sleeved with the lower packing box 8, and a deviation correction groove 11 is formed at the top of the outer wall of the large pressure cover 7, and the lower packing box 8 is arranged in the deviation correction groove 11.

[0025] Furthermore, the U-shaped opening of the fluororubber U-ring 13 faces downward, the outer ring of the fluororubber U-ring 13 is installed in the top groove of the base body 9, the inner ring of the fluororubber U-ring 13 is installed in the groove of the lower packing box 8, the large pressure cover 7 compresses the outer pressure ring 12, the outer pressure ring 12 compresses the fluororubber U-ring 13, the inner nut 14 compresses the inner pressure ring 15, the inner pressure ring 15 compresses the fluororubber U-ring 13, there is a moving gap between the top end face of the inner wall of the large pressure cover 7 and the top end face of the outer wall of the inner nut 14, the outer diameter of the deviation correction groove 11 is slightly larger than the outer diameter of the part of the inner fluororubber U-ring 13 in the deviation correction groove 11, so that there is a moving gap between the large pressure cover 7 and the lower packing box 8; When the device is working, the polished rod 10 of the pumping unit moves reciprocally up and down. The upper guide sleeve 2 in the upper gland 1 and the lower guide sleeve 6 in the lower packing box 8 guide the polished rod 10 of the pumping unit. Through the sealing effect of the packing rings 4 in the upper packing box 3 and the lower packing box 8, it prevents the leakage of oil, gas and water along the polished rod 10 of the pumping unit moving reciprocally up and down. During the working process, due to factors such as the vibration of the polished rod 10 of the pumping unit itself, the straightness error of the polished rod 10 of the pumping unit, the inclination of the Christmas tree, the well deviation, and the inclination of the packer, etc., the polished rod 10 of the pumping unit has a tendency of radial offset. Under the action of the elasticity of the fluororubber U-ring 13 itself, the upper packing box 3, the lower packing box 8, the inner nut 14, the inner pressure ring 15, the polished rod 10 of the pumping unit, and the packing ring 4 can move radially and axially arbitrarily within 1 cm. When the polished rod 10 of the pumping unit, the packing ring 4, the upper packing box 3, and the lower packing box 8 are offset, the lower packing box 8, the inner nut 14, and the inner pressure ring 15 are offset and squeeze the fluororubber U-ring 13. Thus, when the polished rod 10 of the pumping unit is offset, through the reasonable deviation adjustment of the deviation correction component, it avoids excessive local stress on the packing ring 4 caused by the polished rod 10 of the pumping unit, thereby reducing the unreasonable wear between the packing ring 4 and the polished rod 10 of the pumping unit, avoiding the formation of gaps due to the eccentric wear of the polished rod 10 of the pumping unit on the packing ring 4 resulting in oil leakage, and further extending and reducing the service life of the packing ring 4 and the polished rod 10 of the pumping unit; by the deviation correction component following the deviation during the movement of the polished rod 10 of the pumping unit, the packing ring 4 can be sealed according to the actual running position of the polished rod 10 of the pumping unit, enabling the packing ring 4 to move with the polished rod 10 of the pumping unit, avoiding the eccentric wear of the polished rod 10 of the pumping unit on the packing ring 4, and ensuring the coaxiality between the lower packing box 8 and the polished rod 10 of the pumping unit; The compaction effect of the large gland 7, the outer pressure ring 12, the inner pressure ring 15, and the inner nut 14 ensures the stability of the fluororubber U-ring 13 during operation. Also, through a reasonable pressure distribution, it avoids the formation of gaps due to uneven pressure. At the same time, under the sealing effect of the fluororubber U-ring 13 itself, it avoids oil leakage caused by oil passing through the gap between the base body 9 and the lower packing box 8.

[0026] Please refer to Figure 2 、 Figure 3 and Figure 5, an embodiment provided by the present invention: a polished rod seal for a pumping unit with a dynamic deviation correction function. A sealing assembly is provided on the outer pressure ring 12. When repairing and replacing the components of the seal, the passageways between the lower and upper parts of the polished rod 10 of the pumping unit are closed. The sealing assembly includes: a rotating handwheel 16, a threaded sleeve 22, a push rod 25, a pressing plug 29, and a sealing fluororubber plug 30. Mounting cylinders 27 are symmetrically and fixedly connected to the base body 9. A sealing fluororubber plug 30 is movably mounted on the inner wall of the mounting cylinder 27. The sealing fluororubber plug 30 is in contact with the polished rod 10 of the pumping unit. A pressing plug 29 is fixedly installed inside the sealing fluororubber plug 30. The pressing plug 29 is movably sleeved on the outer wall of the push rod 25. A push shaft 32 is fixedly connected to the side wall of the push rod 25. A threaded sleeve 22 is threadedly connected to the outer wall of the push shaft 32. A rotating handwheel 16 is fixedly connected to the side wall of the threaded sleeve 22; A limiting block 33 is fixedly connected to the side wall of the push shaft 32. A guiding and sealing sleeve 26 is movably sleeved on the outer wall of the limiting block 33. A limiting groove 34 is formed in the guiding and sealing sleeve 26. The limiting groove 34 is movably sleeved on the outer wall of the limiting block 33.

[0027] Further, during the replacement and repair of the seal, the rotating handwheels 16 on both sides of the base body 9 are rotated. The rotating handwheels 16 drive the threaded sleeves 22 to rotate. Under the action of the internal and external threads of the threaded sleeve 22, at the same time, under the action of the limiting groove 34, the limiting block 33 limits the movement range of the limiting block 33. The limiting block 33 limits the movement range of the push shaft 32, preventing the push shaft 32 from rotating with the threaded sleeve 22. The threaded sleeve 22 drives the push shaft 32 to move radially. The push shaft 32 drives the push rod 25, and the pressure applied by the push rod 25 to the pressing plug 29 gradually increases, causing the pressing plug 29 to press the sealing fluororubber plug 30 in the mounting cylinder 27. Thus, the sealing fluororubber plugs 30 on both sides press and embrace the polished rod 10 of the pumping unit, closing the passage between the polished rod 10 of the pumping unit and the base body 9. Therefore, during the replacement and repair of the seal assembly, blowout is prevented and oil leakage is avoided.

[0028] Please refer to Figure 2 , Figure 3 and Figure 4 , an embodiment provided by the present invention: a polished rod seal for a pumping unit with a dynamic deviation correction function. A braking assembly is provided on the base body 9. When installing the components of the seal, the lower packing box 8 is stopped. The braking assembly includes: a braking pin 17. The base body 9 is threadedly connected to the outer wall of the braking pin 17. A braking notch 18 is formed in the side wall of the lower packing box 8. The braking notch 18 is movably sleeved on the outer wall of the braking pin 17; The outer wall of the base body 9 is threadedly connected with a large gland 7. The large gland 7 is movably sleeved on the outer wall of the outer pressure ring 12. The outer pressure ring 12 is movably sleeved on the outer wall of the fluororubber U-ring 13. The inner wall of the base body 9 is movably sleeved with a lower stuffing box 8. The outer wall of the lower stuffing box 8 is movably sleeved with an inner pressure ring 15. The fluororubber U-ring 13 is in contact with the inner pressure ring 15. The outer wall of the lower stuffing box 8 is threadedly connected with an inner nut 14. The inner wall of the lower stuffing box 8 is movably installed with a packing ring 4. The packing ring 4 is movably sleeved on the polished rod 10 of the pumping unit rod. The top of the outer wall of the lower stuffing box 8 is threadedly connected with an upper stuffing box 3. The top of the outer wall of the upper stuffing box 3 is threadedly connected with an upper gland 1. The upper stuffing box 3 is movably sleeved on the outer wall of the upper guide sleeve 2. The upper guide sleeve 2 is movably sleeved on the polished rod 10 of the pumping unit rod. The upper guide sleeve 2 is in contact with the packing ring 4. The outer wall of the polished rod 10 of the pumping unit rod is movably sleeved with a lower guide sleeve 6. The lower guide sleeve 6 is in contact with the packing ring 4. The outer wall of the lower guide sleeve 6 is movably sleeved with the lower stuffing box 8. A deviation correction groove 11 is formed at the top of the outer wall of the large gland 7. The lower stuffing box 8 is arranged in the deviation correction groove 11.

[0029] Further, when installing the seal, axially install the lower guide sleeve 6 into the lower stuffing box 8, axially sleeve the upper stuffing box 3 on the top of the lower stuffing box 8, axially connect the internal thread at the bottom end of the upper stuffing box 3 and the external thread at the top end of the lower stuffing box 8, axially install the packing ring 4 into the lower stuffing box 8 and the upper stuffing box 3 from top to bottom in sequence, axially install the upper guide sleeve 2 into the upper stuffing box 3 to make the upper guide sleeve 2 compact the packing ring 4, axially sleeve the upper gland 1 on the top of the upper stuffing box 3, and axially connect the internal thread at the bottom end of the upper gland 1 and the external thread at the top end of the upper stuffing box 3. Axially install the lower stuffing box 8 into the base body 9, rotate the brake pin 17 clockwise, and the brake pin 17 radially screws into any one of the brake notches 18 on the base body 9 to fix and stop the lower stuffing box 8 with the brake pin 17. At this time, the lower stuffing box 8 is stably fixed on the base body 9, and the coaxiality of the lower stuffing box 8 and the base body 9 is ensured. At this time, the U-shaped opening of the fluororubber U-ring 13 can be downward. The outer ring of the fluororubber U-ring 13 is installed in the top groove of the base body 9, and the inner ring of the fluororubber U-ring 13 is installed in the groove of the lower stuffing box 8. Axially install the inner pressure ring 15 between the fluororubber U-ring 13 and the lower stuffing box 8, and axially sleeve the inner nut 14 onto the lower stuffing box 8 through threads to make the inner nut 14 compact the inner pressure ring 15, so that the inner pressure ring 15 further compacts the fluororubber U-ring 13. Axially install the outer pressure ring 12 into the large gland 7, and axially sleeve the large gland 7 onto the base body 9 through threads to make the outer pressure ring 12 compact the fluororubber U-ring 13. The fluororubber U-ring 13 compacts the base body 9 and the lower stuffing box 8, thereby ensuring the seal between the fluororubber U-ring 13 and the outer pressure ring 12, the inner pressure ring 15, the base body 9, and the lower stuffing box 8. Before using the device, rotate the brake pin 17 in the reverse direction. The brake pin 17 radially rotates out of the brake notch 18, releasing the fixed stop of the brake pin 17 on the lower packing box 8. Thus, when the device is working, the lower packing box 8 can move within the base body 9. Under the action of the self-elasticity of the fluororubber U-shaped ring 13, the upper packing box 3, the lower packing box 8, the inner nut 14, the inner pressure ring 15, the polished rod 10 of the pumping unit, and the packing ring 4 can move radially and axially within a range of 1 cm.

[0030] Please refer to Figure 2 、 Figure 3 、 Figure 6 and Figure 7 For an embodiment provided by the present invention: a polished rod seal for a pumping unit with a dynamic deviation correction function. A filling component is arranged on the upper packing box 3, and the filling component is used for replenishing the sealing material in the upper packing box 3. The filling component includes: a glue injection gun seat 5 and a feed hole 21. The glue injection gun seats 5 are symmetrically arranged on the outer wall of the upper packing box 3, and the two glue injection gun seats 5 are fixedly connected by bolts. The feed holes 21 are symmetrically opened on the outer wall of the upper packing box 3. A filling groove 19 is opened on the side wall of the glue injection gun seat 5, and a filling hole 20 is opened on the side wall of the glue injection gun seat 5. The filling hole 20 communicates with the filling groove 19, the filling hole 20 is aligned with the feed hole 21, and the filling hole 20 communicates with the feed hole 21. A large gland 7 is connected to the outer wall of the base body 9 by threads. The large gland 7 is movably sleeved on the outer wall of the outer pressure ring 12. The outer pressure ring 12 is movably sleeved on the outer wall of the fluororubber U-shaped ring 13. The inner wall of the base body 9 is movably sleeved with a lower packing box 8. The outer wall of the lower packing box 8 is movably sleeved with an inner pressure ring 15. The fluororubber U-shaped ring 13 is in contact with the inner pressure ring 15. The outer wall of the lower packing box 8 is connected to an inner nut 14 by threads. The inner wall of the lower packing box 8 is movably installed with a packing ring 4. The packing ring 4 is movably sleeved on the outer wall of the polished rod 10 of the pumping unit. The top of the outer wall of the lower packing box 8 is connected to the upper packing box 3 by threads.

[0031] Furthermore, with the long-term reciprocating movement of the polished rod 10 of the pumping unit, the packing ring 4 wears out, and a gap appears between the packing ring 4 and the polished rod 10 of the pumping unit, which will cause the leakage of crude oil or the oil-water mixture. The staff aims the muzzle of the feeding device at the feeding groove 19 on one of the injection gun seats 5, inserts the muzzle of the feeding device into the feeding groove 19, and injects the sealing material through the feeding device. The sealing material passes through the injection hole 20 and the feeding hole 21 in sequence and enters the upper packing box 3. The sealing material restores the expansion performance of the packing ring 4 in the upper packing box 3 and the lower packing box 8, and restores the seamless fit and sealing between the packing ring 4 and the polished rod 10 of the pumping unit. Thus, the injection of the sealing material is realized without cutting off the well pressure and without stopping the machine, reducing the shutdown maintenance time, improving the oil production efficiency of the pumping unit, enabling the device to not need to frequently replace the packing ring 4 after the packing ring 4 is loaded, only needing to supplement the injection of the sealing material, and further reducing the shutdown maintenance time. After the supplementary injection of the sealing material is completed, the muzzle of the feeding device is removed from the feeding groove 19, and the muzzle of the feeding device is moved into the feeding groove 19 on another injection gun seat 5, and the sealing material is injected again. By injecting the sealing material at both ends of the upper packing box 3 in sequence, it is ensured that the sealing material can fully penetrate and ensure the restoration effect of the expansion performance of the packing ring 4.

[0032] Please refer to Figure 3 、 Figure 5 and Figure 8 As shown in FIGS.

[0033] Further, when replacing and repairing the components of the seal, rotate the rotating handwheels 16 on both sides. The rotation of the rotating handwheels 16 drives the threaded sleeve 22 to rotate within the guide gland 23. The fixing bolts 24 ensure the stability between the guide seal sleeve 26 and the guide gland 23. The threaded sleeve 22 drives the push shaft 32 to move radially. The push shaft 32 drives the push rod 25 to move within the guide seal sleeve 26. The push rod 25 drives the extrusion plug 29 to extrude the sealing fluororubber plug 30. The sealing fluororubber plugs 30 on both sides perform a pressing and surrounding action on the polished rod 10 of the pumping unit rod, closing the passage between the polished rod 10 of the pumping unit rod and the base body 9. At this time, by rotating the stop pin 28, the stop pin 28 gradually squeezes the push shaft 32, achieving the extrusion and fixation of the push shaft 32, and preventing the loosening of the push shaft 32 and the push rod 25, which may cause the sealing fluororubber plug 30 to lose its function of closing the passage between the polished rod 10 of the pumping unit rod and the base body 9. In addition, during the movement of the push shaft 32, under the action of the stop mother block 31, after the push shaft 32 contacts the stop mother block 31, the stop mother block 31 resists the push shaft 32, thereby preventing the push rod 25 from further squeezing the extrusion plug 29 and causing the rupture of the extrusion plug 29.

[0034] Working principle: Rotate the brake pin 17 in the forward direction. The brake pin 17 is screwed into the brake notch 18 to fix the lower packing box 8 and the base body 9. Install the components of the seal. When using the seal, rotate the brake pin 17 in the reverse direction to release the stop of the lower packing box 8. The polished rod 10 of the pumping unit rod moves reciprocally up and down. The packing ring 4 prevents oil leakage. Through the action of the fluororubber U-ring 13, the upper packing box 3, the lower packing box 8, the inner nut 14, the inner pressure ring 15, the polished rod 10 of the pumping unit rod, and the packing ring 4 can move radially and axially, ensuring the coaxiality between the lower packing box 8 and the polished rod 10 of the pumping unit rod. When replenishing the sealing material, insert the nozzle of the injection device into the injection groove 19 and inject the sealing material. The sealing material restores the expansion performance of the packing ring 4 in the upper packing box 3 and the lower packing box 8. When replacing and repairing the components of the seal, rotate the rotating handwheel 16 to make the push rod 25 drive the extrusion plug 29 to extrude the sealing fluororubber plug 30. The sealing fluororubber plug 30 performs a pressing and surrounding action on the polished rod 10 of the pumping unit rod to achieve the sealing of the upper and lower passages.

[0035] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

Claims

1. A polished rod seal for a pumping unit with a dynamic deviation rectification function, characterized in that: It includes a base body (9), and a deviation rectifying component is arranged on the base body (9); The deviation rectifying component includes: a lower packing box (8), an outer pressure ring (12), a fluororubber U-ring (13), an inner nut (14) and an inner pressure ring (15); A large gland (7) is connected to the outer wall of the base body (9) by a thread. The large gland (7) is movably sleeved on the outer wall of the outer pressure ring (12). The outer pressure ring (12) is movably sleeved on the outer wall of the fluororubber U-ring (13). The inner wall of the base body (9) is movably sleeved with the lower packing box (8). The outer wall of the lower packing box (8) is movably sleeved with the inner pressure ring (15). The fluororubber U-ring (13) is in contact with the inner pressure ring (15). The outer wall of the lower packing box (8) is connected to the inner nut (14) by a thread. A packing ring (4) is movably installed on the inner wall of the lower packing box (8). The packing ring (4) is movably sleeved on the outer wall of the polished rod of the pumping unit rod (10). The top of the outer wall of the lower packing box (8) is connected to the upper packing box (3) by a thread.

2. The polished rod seal of the pumping unit with a dynamic deviation rectification function according to claim 1, wherein: A sealing component is arranged on the outer pressure ring (12). When the sealing device components are repaired and replaced, the sealing component closes the passage between the lower part and the upper part of the polished rod of the pumping unit rod (10); The sealing component includes: a rotating handwheel (16), a threaded sleeve (22), a push rod (25), a pressing plug (29) and a sealing fluororubber plug (30); Mounting cylinders (27) are symmetrically and fixedly connected to the base body (9). The inner wall of the mounting cylinder (27) is movably installed with the sealing fluororubber plug (30). The sealing fluororubber plug (30) is in contact with the polished rod of the pumping unit rod (10). A pressing plug (29) is fixedly installed in the sealing fluororubber plug (30). The pressing plug (29) is movably sleeved on the outer wall of the push rod (25). A push shaft (32) is fixedly connected to the side wall of the push rod (25). The outer wall of the push shaft (32) is connected to the threaded sleeve (22) by a thread. A rotating handwheel (16) is fixedly connected to the side wall of the threaded sleeve (22).

3. The polished rod seal of a pumping unit with a dynamic deviation correction function according to claim 1, characterized in that: A braking component is arranged on the base body (9). When the sealing device components are installed, the braking component stops the lower packing box (8); The braking component includes: a braking pin (17). The base body (9) is connected to the outer wall of the braking pin (17) by a thread. A braking notch (18) is formed in the side wall of the lower packing box (8). The braking notch (18) is movably sleeved on the outer wall of the braking pin (17).

4. A polished rod seal for a pumping unit with a dynamic deviation correction function according to claim 1, characterized in that: A material injection component is arranged on the upper packing box (3). The material injection component is used for replenishing the sealing material in the upper packing box (3); The material injection component includes: a glue injection gun seat (5) and a feed hole (21). Glue injection gun seats (5) are symmetrically arranged on the outer wall of the upper packing box (3). The two glue injection gun seats (5) are fixedly connected by bolts. Feed holes (21) are symmetrically formed in the outer wall of the upper packing box (3). A material injection groove (19) is formed in the side wall of the glue injection gun seat (5). A material injection hole (20) is formed in the side wall of the glue injection gun seat (5). The material injection hole (20) communicates with the material injection groove (19). The material injection hole (20) is aligned with the feed hole (21). The material injection hole (20) communicates with the feed hole (21).

5. The polished rod seal of the pumping unit with a dynamic deviation rectification function according to claim 1, characterized in that: The top of the outer wall of the upper packing box (3) is connected with an upper gland (1) by threads. The upper packing box (3) is movably sleeved on the outer wall of the upper guide sleeve (2). The upper guide sleeve (2) is movably sleeved on the polished rod of the pumping unit rod (10). The upper guide sleeve (2) is in contact with the packing ring (4). The outer wall of the polished rod of the pumping unit rod (10) is movably sleeved with a lower guide sleeve (6). The lower guide sleeve (6) is in contact with the packing ring (4). The outer wall of the lower guide sleeve (6) is movably sleeved with a lower packing box (8). The top of the outer wall of the large gland (7) is provided with a deviation correction groove (11), and the lower packing box (8) is arranged in the deviation correction groove (11).

6. The polished rod seal of the pumping unit with a dynamic deviation rectification function according to claim 2, wherein: The installation cylinder (27) is connected with a guide seal sleeve (26) by bolts. The guide seal sleeve (26) is movably sleeved on the outer wall of the propulsion shaft (32). A guide gland (23) is arranged on the side wall of the guide seal sleeve (26). The guide gland (23) is movably sleeved on the outer wall of the fixing bolt (24). The outer wall of the fixing bolt (24) is movably sleeved with the installation cylinder (27).

7. The polished rod seal of a pumping unit with a dynamic deviation rectification function according to claim 6, characterized in that: The guide seal sleeve (26) is movably sleeved on the outer wall of the stop pin (28). The stop pin (28) is in contact with the propulsion shaft (32). A stop mother block (31) is fixedly connected to the side wall of the extrusion plug (29). The stop mother block (31) is movably sleeved on the outer wall of the propulsion rod (25).

8. The polished rod seal of a pumping unit with a dynamic deviation rectification function according to claim 2, characterized in that: A limiting block (33) is fixedly connected to the side wall of the propulsion shaft (32). The outer wall of the limiting block (33) is movably sleeved with the guide seal sleeve (26). A limiting groove (34) is formed in the guide seal sleeve (26), and the limiting groove (34) is movably sleeved on the outer wall of the limiting block (33).

9. A polished rod seal for a pumping unit with a dynamic deviation correction function according to claim 1, characterized in that: The number of the packing rings (4) is 10, and the upper packing box (3) is movably sleeved on the outer wall of the packing ring (4).

10. The polished rod seal of a pumping unit with a dynamic deviation rectification function according to claim 1, characterized in that: The bottom of the fluororubber U-shaped ring (13) is in contact with the base body (9). The bottom of the fluororubber U-shaped ring (13) is in contact with the lower packing box (8). The bottom of the inner nut (14) is in contact with the inner pressure ring (15).

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