Oil extraction polish rod plugging device
The oil production polished rod sealing device with a multi-sealing structure and a tapered sleeve design solves the problem of unstable fixation, achieves stable clamping and sealing of the polished rod, ensures the safety and environmental protection of the oil production equipment, and extends the service life of the device.
Patent Information
- Application Number
- CN202423090521.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The fixing method of the existing oil production polished rod plugging device is not stable enough and is easy to loosen, which affects the normal operation of the oil production equipment and poses a safety hazard.
The synergistic effect of multiple sealing structures (sealing ring, sealing ring, first sealing gasket) is adopted, combined with the tapered sleeve design and bolt clamping system to ensure the stable clamping and sealing of the polished rod. The high temperature and corrosion resistant materials and anti-loosening washers are used to improve the stability and durability of the device.
Effectively prevent oil leakage, ensure the safety and environmental protection of oil production operations, extend the service life of the equipment, reduce maintenance costs, and avoid equipment failures and safety hazards caused by looseness.
Smart Images
Figure CN223343996U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oil production polished rod plugging, in particular to an oil production polished rod plugging device. Background Art
[0002] Traditional polished rod plugging systems often employ simple sealing structures, such as single rubber gaskets or mechanical seals. These simple sealing structures can easily fail during oil production due to the high pressure, high temperature, and complex chemical substances present in the well.
[0003] However, some existing plugging devices used to secure the polished rods in the existing technology lack a secure fixation mechanism. Some devices use a simple clamp structure to secure the polished rods. During the oil production process, due to the vertical movement and rotation of the polished rods, these simple clamp structures are prone to loosening. If the polished rods are not securely fixed, the normal operation of the oil production equipment can be affected, equipment wear can be increased, and even safety accidents can occur. Utility Model Content
[0004] In view of the aforementioned problems existing in the prior art, the primary purpose of the present invention is to provide a polished rod sealing device for oil production, addressing the inadequately secure fixing methods employed by some prior art sealing devices. Some devices utilize a simple clamp structure to secure the polished rod. However, due to the vertical and rotational movement of the polished rod during the oil production process, this simple clamp structure is susceptible to loosening. A loosely secured polished rod can affect the normal operation of the oil production equipment, increase equipment wear, and even potentially lead to safety accidents.
[0005] The technical solution of the utility model is as follows: a production polished rod plugging device, comprising a tube body and a cap, wherein two conical sleeves are fixedly connected to the inside of the tube body, the tops of the conical sleeves are fixedly connected to sealing rings, the bottom of the cap is fixedly connected to a sealing ring, a sealing groove is provided on the top of the tube body, the sealing ring is used in conjunction with the sealing groove, the caps are threadedly connected to the tube body, a limiting block is fixedly connected to the inside of the tube body and below the cap, the top of the limiting block is fixedly connected to a first sealing gasket, and the first sealing gasket is in contact with the bottom of the cap.
[0006] Through the above technical solution, multiple sealing structures (sealing ring, sealing ring, first sealing gasket) work together to effectively prevent oil leakage and ensure the safety and environmental protection of oil production operations. The design of the tapered sleeve helps the polished rod to enter the pipe body accurately and smoothly, facilitating the installation and operation of the device.
[0007] As a preferred embodiment, both sides of the tube body are fixedly connected with fixed tubes, the interior of the fixed tubes are threadedly connected with bolts, one end of the bolts are rotatably connected with clamping blocks, the clamping blocks are slidably connected to the inner wall of the fixed tube, and the fixed tube is communicated with the interior of the tube body.
[0008] With the above technical solution, the clamping block can be conveniently controlled to clamp or loosen the polished rod by rotating the bolt. The operation is simple and reliable, and the polished rod can be firmly fixed to prevent the polished rod from shaking during operation.
[0009] As a preferred embodiment, the end of the fixing tube away from the tube body is fixedly connected to the second nut, the side of the second nut away from the fixing tube is fixedly connected to the connecting tube, the end of the connecting tube away from the second nut is fixedly connected to the first nut, one end of the bolt passes through the second nut, the connecting tube and the first nut, and the bolt is threadedly connected to the second nut and the first nut.
[0010] Through the above technical solution, the combined structure of the nut and the connecting pipe makes the movement of the bolt more stable and precise, thereby ensuring the reliability and stability of the clamping block clamping the polished rod, facilitating the installation and maintenance of the bolt, and facilitating partial replacement if a component is damaged.
[0011] As a preferred embodiment, a second sealing gasket is fixedly connected to the inner wall of the cap and located above the sealing ring at equal distances, and a hexagonal rod is fixedly connected to one end of the bolt away from the tube body.
[0012] Through the above technical solution, the sealing performance of the cap is further improved, oil leakage from between the cap and the polished rod is prevented, and the overall sealing performance of the device is guaranteed.
[0013] As a preferred embodiment, the bottom of the tube body is provided with anti-slip grooves, and the sealing ring and the sealing ring are both made of high-temperature resistant and corrosion-resistant rubber material. The cross section of the sealing ring is circular, and the cross section of the sealing ring is trapezoidal.
[0014] Through the above technical solution, the anti-slip grooves on the bottom of the pipe body ensure that the device will not slide easily during operation, ensuring safe operation. The high-temperature and corrosion-resistant sealing rings and sealing rings can adapt to the harsh working environment of the oil production site, extend the service life of the device and reduce maintenance costs.
[0015] As a preferred embodiment, an anti-loosening washer is provided inside the connecting pipe, and the anti-loosening washer is made of metal and has wavy texture on the surface.
[0016] Through the above technical solution, the anti-loosening washers can ensure that the bolts remain tightened in a long-term, high-vibration oil production operation environment, ensure that the clamping block continues to firmly clamp the polished rod, and reduce equipment failures and safety hazards caused by loose bolts.
[0017] Compared with the prior art, the advantages and positive effects of the present invention are:
[0018] The utility model has multiple sealing structures, sealing rings, sealing rings and first sealing gaskets, which work together to effectively prevent oil leakage and ensure the safety and environmental protection of oil production operations. The design of the tapered sleeve helps the polished rod to enter the pipe body accurately and smoothly, which is convenient for installation and operation of the device. By turning the bolt, the clamping block can be conveniently controlled to clamp or loosen the polished rod. The operation is simple and reliable, and the polished rod can be firmly fixed to prevent the polished rod from shaking during operation. The combined structure of the nut and the connecting pipe makes the movement of the bolt more stable and accurate, thereby ensuring the reliability and stability of the clamping block clamping the polished rod and facilitating the installation of the bolt. and maintenance. If a component is damaged, it is convenient to carry out local replacement, further improving the sealing performance of the cap to prevent oil leakage from between the cap and the rod, ensuring the overall sealing performance of the device. The anti-slip grooves at the bottom of the tube body ensure that the device will not slide easily during operation, ensuring safe operation. The high-temperature and corrosion-resistant sealing rings and sealing rings can adapt to the harsh working environment of the oil production site, extend the service life of the device, and reduce maintenance costs. The anti-loosening washers can ensure that the bolts remain tightened in a long-term, high-vibration oil production operation environment, ensure that the clamping block continues to firmly clamp the rod, and reduce equipment failures and safety hazards caused by loose bolts. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 The utility model provides a three-dimensional structural diagram of an oil production polished rod plugging device;
[0020] Figure 2 The utility model provides a schematic diagram of the cross-sectional main structure of an oil production polished rod plugging device;
[0021] Figure 3 The utility model provides a schematic diagram of the cross-sectional top view of the oil production polished rod plugging device;
[0022] Figure 4 The utility model provides a schematic diagram of the cross-section structure of an oil production polished rod plugging device when viewed from above.
[0023] Legend: 1. Tube body; 2. Limit block; 3. First sealing gasket; 4. Second sealing gasket; 5. Cover cap; 6. Sealing ring; 7. Sealing groove; 8. Conical sleeve; 9. Sealing ring; 10. Fixing tube; 11. Bolt; 12. Clamping block; 13. First nut; 14. Second nut; 15. Hexagonal rod; 16. Connecting tube. DETAILED DESCRIPTION
[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0025] Example
[0026] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the utility model provides a technical solution: it includes a tube body 1 and a cap 5, two conical sleeves 8 are fixedly connected to the inside of the tube body 1, the tops of the conical sleeves 8 are fixedly connected to sealing rings 9, the bottom of the cap 5 is fixedly connected to a sealing ring 6, a sealing groove 7 is opened on the top of the tube body 1, the sealing ring 6 is used in conjunction with the sealing groove 7, the caps 5 are threadedly connected to the tube body 1, the inside of the tube body 1 and below the cap 5 is fixedly connected to a limiting block 2, the top of the limiting block 2 is fixedly connected to a first sealing gasket 3, and the first sealing gasket 3 is in contact with the bottom of the cap 5.
[0027] In this embodiment, the two conical sleeves 8 inside the tube body 1 are used to guide and position the oil production polished rod. When the polished rod is inserted into the tube body 1, the conical sleeve 8 can gradually move the polished rod into the appropriate position. The sealing ring 9 on the top of the conical sleeve 8 can form a seal at the contact point between the polished rod and the conical sleeve 8, preventing oil from leaking from this part. The cap 5 can be tightly covered on the top of the tube body 1 through a threaded connection with the tube body 1. The sealing ring 6 at the bottom of the cap 5 cooperates with the sealing groove 7 at the top of the tube body 1, further enhancing the sealing performance of the top of the tube body 1. The first sealing gasket 3 on the limit block 2 below the cap 5 inside the tube body 1 contacts the bottom of the cap 5 when the cap 5 is tightened, acting as a seal to prevent oil from leaking from the connection between the cap 5 and the tube body 1.
[0028] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, both sides of the tube body 1 are fixedly connected with fixed tubes 10, the interior of the fixed tubes 10 are threadedly connected with bolts 11, one end of the bolts 11 are rotatably connected with clamping blocks 12, the clamping blocks 12 are slidably connected to the inner wall of the fixed tube 10, and the fixed tube 10 is communicated with the interior of the tube body 1.
[0029] In this embodiment, when the bolt 11 is rotated, since the bolt 11 is threadedly connected to the fixed tube 10, the bolt 11 will move axially in the fixed tube 10, and the clamping block 12 connected to one end of the bolt 11 is rotated. When the bolt 11 moves, since the clamping block 12 is slidingly connected to the inner wall of the fixed tube 10, the clamping block 12 can only move in a direction perpendicular to the axial direction of the bolt 11, thereby achieving a clamping effect on the light rod inserted into the tube body 1.
[0030] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the end of the fixing tube 10 away from the tube body 1 is fixedly connected to the second nut 14, the side of the second nut 14 away from the fixing tube 10 is fixedly connected to the connecting tube 16, the end of the connecting tube 16 away from the second nut 14 is fixedly connected to the first nut 13, one end of the bolt 11 passes through the second nut 14, the connecting tube 16 and the first nut 13, and the bolt 11 is threadedly connected to the second nut 14 and the first nut 13.
[0031] In this embodiment, the bolt 11 sequentially passes through the second nut 14, the connecting tube 16, and the first nut 13, and is threadedly connected to the second nut 14 and the first nut 13. This structure allows the bolt 11 to move axially within the connecting tube 16 during rotation, thereby driving the clamping block 12 to move and clamp the polished rod. The connecting tube 16 serves to connect the second nut 14 and the first nut 13, ensuring a stable movement trajectory of the bolt 11.
[0032] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the second sealing gasket 4 is fixedly connected to the inner wall of the cap 5 and above the sealing ring 6 at equal distances, and the end of the bolt 11 away from the tube body 1 is fixedly connected to the hexagonal rod 15.
[0033] In this embodiment, the inner wall of the cap 5 is located above the sealing ring 6 and fixed with a second sealing gasket 4 equidistantly. When the cap 5 is screwed onto the tube body 1 , the second sealing gasket 4 can further fill any gap between the cap 5 and the polished rod, thereby enhancing the sealing performance.
[0034] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the bottom of the tube body 1 is provided with anti-slip grooves, and the sealing ring 6 and the sealing ring 9 are both made of high-temperature resistant and corrosion-resistant rubber material. The cross section of the sealing ring 6 is circular, and the cross section of the sealing ring 9 is trapezoidal.
[0035] In this embodiment, the anti-slip grooves on the bottom of the tube body 1 increase the friction between the tube body 1 and the placement surface, making the device more stable during placement. The sealing ring 6 and the sealing ring 9 are made of high-temperature and corrosion-resistant rubber materials, which can maintain good physical and chemical properties in oil production environments. The circular cross-section of the sealing ring 6 is suitable for sealing with the sealing groove 7, and the trapezoidal cross-section of the sealing ring 9 can better adapt to pressure changes when contacting the tapered sleeve 8 and the polished rod, ensuring a good sealing effect.
[0036] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, an anti-loosening washer is provided inside the connecting pipe 16. The anti-loosening washer is made of metal and has wavy texture on the surface.
[0037] In this embodiment, when the bolt 11 is tightened, the anti-loosening washer inside the connecting pipe 16 generates a large friction force with the bolt 11 due to its metal material and wavy texture, preventing the bolt 11 from loosening due to vibration during the oil production process.
[0038] Working principle:
[0039] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the two conical sleeves 8 inside the tube body 1 are used to guide and position the oil production rod. When the rod is inserted into the tube body 1, the conical sleeve 8 can make the rod gradually enter the appropriate position, and the sealing ring 9 on the top of the conical sleeve 8 can form a seal at the contact point between the rod and the conical sleeve 8 to prevent oil from leaking from this part. The cap 5 can be tightly covered on the top of the tube body 1 through a threaded connection with the tube body 1. The sealing ring 6 at the bottom of the cap 5 cooperates with the sealing groove 7 at the top of the tube body 1, further enhancing the sealing of the top of the tube body 1. The first sealing gasket 3 on the limit block 2 below the cap 5 inside the tube body 1 contacts the bottom of the cap 5 when the cap 5 is tightened, playing a sealing role to prevent oil from leaking from the connection between the cap 5 and the tube body 1;
[0040] When the bolt 11 is rotated, since the bolt 11 is threadedly connected to the fixed tube 10, the bolt 11 will move axially in the fixed tube 10, and the clamping block 12 connected to one end of the bolt 11 is rotated. When the bolt 11 moves, since the clamping block 12 is slidingly connected to the inner wall of the fixed tube 10, the clamping block 12 can only move in a direction perpendicular to the axial direction of the bolt 11, thereby achieving a clamping effect on the polished rod inserted into the tube body 1. The bolt 11 passes through the second nut 14, the connecting tube 16 and the first nut 13 in sequence, and is threadedly connected to the second nut 14 and the first nut 13. This structure allows the bolt 11 to move axially in the connecting tube 16 when rotating, thereby driving the clamping block 12 to move and clamp the polished rod. The connecting tube 16 serves to connect the second nut 14 and the first nut 13, ensuring the stable movement trajectory of the bolt 11. The inner wall of the cap 5 is located above the sealing ring 6 and is equidistantly fixed with the second sealing gasket 4. When the cap 5 is tightened on the tube body 1, the second sealing gasket 4 can further fill the possible gap between the cap 5 and the polished rod to enhance the sealing performance. The anti-slip grooves at the bottom of the tube body 1 can increase the friction between the tube body 1 and the placement plane, making the device more stable when placed. The sealing ring 6 and the sealing ring 9 are made of high-temperature resistant and corrosion-resistant rubber material, which can maintain good physical and chemical properties in an oil production environment. Among them, the circular cross-section of the sealing ring 6 is suitable for sealing with the sealing groove 7, and the trapezoidal cross-section of the sealing ring 9 can better adapt to pressure changes when in contact with the tapered sleeve 8 and the polished rod, thereby ensuring the sealing effect. When the bolt 11 is tightened, the anti-loosening washer inside the connecting pipe 16 uses its metal material and wavy texture to generate a large friction force with the bolt 11, thereby preventing the bolt 11 from loosening due to vibration during the oil production process.
[0041] Finally, it should be noted that the embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A polished rod plugging device for oil production, comprising a tube body (1) and a cap (5), characterized in that: Two conical sleeves (8) are fixedly connected to the interior of the tube body (1), and the tops of the conical sleeves (8) are fixedly connected to sealing rings (9). The bottom of the cap (5) is fixedly connected to a sealing ring (6). A sealing groove (7) is provided on the top of the tube body (1), and the sealing ring (6) is used in conjunction with the sealing groove (7). The cap (5) is threadedly connected to the tube body (1). A limiting block (2) is fixedly connected to the interior of the tube body (1) and located below the cap (5). The top of the limiting block (2) is fixedly connected to a first sealing gasket (3), and the first sealing gasket (3) is in contact with the bottom of the cap (5).
2. The oil production polished rod plugging device according to claim 1, characterized in that: Both sides of the tube body (1) are fixedly connected to fixed tubes (10), the interior of the fixed tubes (10) are threadedly connected to bolts (11), one end of the bolts (11) are rotatably connected to clamping blocks (12), the clamping blocks (12) are slidably connected to the inner wall of the fixed tube (10), and the fixed tube (10) is communicated with the interior of the tube body (1).
3. The oil production polished rod plugging device according to claim 2, characterized in that: The end of the fixing tube (10) away from the tube body (1) is fixedly connected to the second nut (14), the side of the second nut (14) away from the fixing tube (10) is fixedly connected to the connecting tube (16), the end of the connecting tube (16) away from the second nut (14) is fixedly connected to the first nut (13), one end of the bolt (11) passes through the second nut (14), the connecting tube (16) and the first nut (13), and the bolt (11) is threadedly connected to the second nut (14) and the first nut (13).
4. The oil production polished rod plugging device according to claim 3, characterized in that: A second sealing gasket (4) is fixedly connected to the inner wall of the cap (5) and located above the sealing ring (6) at equal distances, and a hexagonal rod (15) is fixedly connected to one end of the bolt (11) away from the tube body (1).
5. The oil production polished rod plugging device according to claim 1, characterized in that: The bottom of the tube body (1) is provided with anti-slip grooves. The sealing ring (6) and the sealing ring (9) are both made of high-temperature resistant and corrosion-resistant rubber material. The cross section of the sealing ring (6) is circular, and the cross section of the sealing ring (9) is trapezoidal.
6. The oil production polished rod plugging device according to claim 3, characterized in that: An anti-loosening washer is provided inside the connecting pipe (16); the anti-loosening washer is made of metal and has wavy patterns on its surface.