A paraffin control structure and paraffin control off-taker

Abstract

The utility model relates to the technical field of oil exploitation discloses a kind of wax-preventing structure and wax-preventing and hanging-off device, wax-preventing structure includes temperature insulation pipe, wax-preventing and cleaning pipe, in working condition, the upper end of temperature insulation pipe is installed in oil well mouth, lower end is inserted into oil well;Wax-preventing and cleaning pipe is detachably connected in the inside of temperature insulation pipe, in working condition, wax-preventing and cleaning pipe is located in the outside of lower hanging-off device.Wax-preventing and hanging-off device includes the wax-preventing structure.The beneficial effect of the utility model is, set temperature insulation pipe solves the root cause of wax deposition, again through wax-preventing and cleaning pipe structure maintenance, jointly prevent wax deposition from adhering to the surface of downhole hanging-off device, ensure the clearance of the movable part of hanging-off device, hanging-off device can be smoothly released at predetermined position, avoid causing downhole sticking accident.

Description

Technical Field

[0001] This utility model relates to the technical field of oil extraction, specifically to an anti-wax structure and an anti-wax delamination device. Background Technology

[0002] Crude oil contains varying amounts of paraffin wax, which is generally in a dissolved state under reservoir conditions. The solubility of wax in crude oil decreases with decreasing temperature. As crude oil rises from the bottom of the well and flows through the tubing, the temperature and pressure of the surrounding environment gradually decrease. When the temperature drops below the wax precipitation point, the wax precipitates from the crude oil in crystal form. The precipitated wax further aggregates and grows to form wax crystals. These wax crystals continue to accumulate and adhere to the tubing wall; this process is called well wax deposition.

[0003] Existing downhole detachers are specialized tools used in oil well or mining operations. Their core function is to deploy, secure, and retrieve specific equipment in the downhole environment. The working principle of downhole detachers typically involves ingenious mechanical design and precise coordination of control mechanisms. However, these downhole detachers have a significant drawback: when the detacher is deployed deep into the oil well, wax deposits can adhere to its surface and clog the gaps between its moving parts. This can prevent the detacher from detaching smoothly at the intended position and cause it to stick to the working barrel, resulting in a stuck pipe accident. Utility Model Content

[0004] The technical problem this invention aims to solve is that existing decoupling devices, when operating downhole, accumulate wax on their surface and clog the gaps between their moving parts, preventing them from disengaging smoothly at the intended position and causing a stuck drill bit accident. The purpose is to provide a wax-proof structure and a wax-proof decoupling device. An insulation pipe addresses the root cause of wax accumulation, while a wax-proof cleaning pipe maintains the structure, jointly preventing wax from adhering to the surface of the downhole decoupling device and ensuring smooth disengagement at the intended position, thus avoiding a stuck drill bit accident.

[0005] This utility model is achieved through the following technical solution:

[0006] A wax-proof structure includes a heat insulation pipe and a wax-proof cleaning pipe. In the working state, the upper end of the heat insulation pipe is installed at the wellhead and the lower end extends into the well. The wax-proof cleaning pipe is detachably connected to the inner side of the heat insulation pipe. In the working state, the wax-proof cleaning pipe is located outside the lower decoupling device.

[0007] The beneficial effects of this invention are as follows: by constructing an insulation layer outside the decoupling device through an insulation pipe, heat loss from the wellbore fluid to the formation is significantly reduced, thereby maintaining the temperature of the fluid flowing over the surface of the decoupling device above the wax precipitation point, fundamentally inhibiting wax crystal precipitation and achieving wax prevention. A removable wax-preventing cleaning pipe is installed inside the insulation pipe. This cleaning pipe acts as a physical barrier; even if a small amount of wax precipitates, the wax will preferentially adhere to the surface of the cleaning pipe rather than the surface of the decoupling device. Wax removal is achieved by periodically removing and cleaning the cleaning pipe. The insulation pipe addresses the root cause of wax buildup, while the wax-preventing cleaning pipe provides structural maintenance, jointly preventing wax from adhering to the surface of the downhole decoupling device, ensuring the clearance of the moving parts of the decoupling device, and allowing the decoupling device to detach smoothly at the predetermined position, avoiding downhole stuck pipe accidents.

[0008] In some embodiments, a retaining ring is further included. The anti-wax cleaning tube is cylindrical, and the retaining ring is engaged with the top of the anti-wax cleaning tube. At least two auxiliary handles are provided on the outer periphery of the retaining ring, and the auxiliary handles are evenly distributed on the top of the anti-wax cleaning tube, located at the upper top of the insulation tube. By providing a retaining ring at the top of the anti-wax cleaning tube and providing auxiliary handles on the retaining ring, the anti-wax cleaning tube can be easily removed during wax removal using the auxiliary handles.

[0009] In some embodiments, the bottom of the retaining ring is provided with at least two limiting clips, which are evenly distributed at the lower end of the retaining ring. The limiting clips engage with the top of the anti-wax cleaning tube, and the bottom of the limiting clips is lower than the bottom of the auxiliary handle and located at the upper end of the insulation tube. The stable engagement of the limiting clips with the anti-wax cleaning tube achieves precise positioning and reliable fixation of the cleaning tube, effectively preventing it from shifting or vibrating in the complex fluid environment downhole. Furthermore, the unique design of the limiting clips being lower than the auxiliary handle further enhances the depth and stability of the engagement while ensuring that the handle operation is not interfered with.

[0010] In some embodiments, the auxiliary handle is in the shape of a long strip plate, and the free end of the auxiliary handle is semi-circular. The long strip plate structure provides ample gripping space for the operator, facilitating extraction, while the semi-circular shape of the free end prevents the tool edge from scratching the operator and reduces the risk of damage to wellhead equipment due to accidental impact.

[0011] In some embodiments, the free end of the auxiliary handle is provided with a suspension hanging hole, which is used to cooperate with the hook of the hook to extract the anti-wax cleaning tube. By providing a suspension hanging hole, operators can safely and smoothly complete the extraction operation using lifting equipment (such as a hook), ensuring the verticality and stability of the tubing string during the extraction process, and effectively preventing the tube from colliding with the wellhead or the insulation wall.

[0012] In some embodiments, a support ring is detachably connected to the bottom of the anti-wax cleaning tube, the top of which abuts against the bottom of the insulation tube. The support ring provides a stable and reliable bottom support base for the anti-wax cleaning tube, thereby effectively preventing lateral swaying or axial displacement that may occur in the long tubing downhole.

[0013] In some embodiments, the support ring is annular, with an internal thread on its inner side, and an external thread at the bottom of the anti-wax cleaning tube that engages with the internal thread, connecting the support ring to the bottom of the anti-wax cleaning tube. The precise engagement of the internal and external threads creates a robust and reliable rigid connection between the support ring and the anti-wax cleaning tube. The detachable nature of the connection facilitates quick disassembly and assembly during maintenance, improving the convenience of cleaning tube inspection and cleaning operations.

[0014] In some embodiments, the support ring is annular, and its outer side wall has several threaded holes evenly distributed in a circle. The bottom of the anti-wax cleaning tube has several threaded holes radially aligned with the threaded holes. Connecting screws pass through the threaded holes and their corresponding holes sequentially to connect the support ring to the bottom of the anti-wax cleaning tube. By fitting the support ring onto the bottom of the anti-wax cleaning tube and connecting it with several screws, a robust and reliable rigid connection is formed between the support ring and the anti-wax cleaning tube. The detachable feature facilitates quick disassembly and assembly during maintenance, improving the convenience of cleaning tube inspection and cleaning operations.

[0015] In some embodiments, a plurality of auxiliary support blocks are provided on the outer periphery of the support ring. The auxiliary support blocks are evenly distributed in a circle, protrude outward from the support ring, and the top of the auxiliary support blocks abuts against the bottom of the insulation tube. By providing a plurality of auxiliary support blocks on the outer periphery of the support ring, deformation of the anti-wax structure due to its own weight or fluid impact is prevented, thereby improving the structural integrity and reliability of the structure under harsh working conditions.

[0016] In some embodiments, the auxiliary support block is located on top of the support ring, and the top of the auxiliary support block is a plane. By making the top of the support ring a plane, the contact area between the auxiliary support block and the insulation tube is increased, ensuring the stability of the device.

[0017] In some embodiments, the heat-insulating tube includes a heat-insulating outer shell, a heat-insulating cavity, and a heat-insulating inner shell. The heat-insulating inner shell is sealed to the inside of the heat-insulating outer shell, and the heat-insulating cavity is located between the heat-insulating outer shell and the heat-insulating inner shell. Utilizing the low thermal conductivity of the still air within the heat-insulating cavity, the temperature of the fluid inside the anti-wax cleaning tube is effectively maintained above the wax crystal precipitation point, fundamentally inhibiting the condensation and adhesion of paraffin wax on the surfaces of internal components such as the decoction device.

[0018] In some embodiments, the thickness of the thermal insulation cavity is 16mm-20mm.

[0019] In some embodiments, a permanent magnet sleeve is further included. The inner top and bottom of the insulation tube are provided with protruding rings, which protrude towards the axis of the insulation tube. The top and bottom of the permanent magnet sleeve abut against the corresponding protruding rings. When wax-rich oil flows through the magnetic field formed by the permanent magnet sleeve, the wax crystals in the crude oil undergo polarization and orientation under the influence of the magnetic field, thereby inhibiting the formation of a three-dimensional network structure and promoting the aggregation of wax crystals into denser, smoother spherical particles. These spherical wax crystals are less likely to adhere and form scale on the metal tube wall and the surface of the descaling device; instead, they are more easily carried away by the flowing crude oil.

[0020] In some embodiments, the system further includes at least two mounting plates evenly distributed in a circle on top of the insulation pipe. One end of each mounting plate is connected to the top of the insulation pipe via fastening bolts, and the other end has several fixing screw holes. The mounting bolts are sequentially screwed into the fixing screw holes and a threaded hole located at the top of the oil well, thus connecting the insulation pipe to the top of the oil well. By evenly distributing the mounting plates in a circle, the load is ensured to be uniformly distributed, preventing pipe eccentricity and ensuring that the entire anti-wax system maintains its designed coaxiality and sealing performance at the wellhead for a long period.

[0021] The present invention provides an anti-wax delamination device, including the aforementioned anti-wax structure.

[0022] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0023] 1. Installing a heat insulation pipe to build a heat insulation layer outside the decoupling device significantly reduces the heat loss of well fluid to the formation, thereby maintaining the temperature of the fluid when it flows over the surface of the decoupling device, making it higher than the wax precipitation point, fundamentally inhibiting the precipitation of wax crystals, and achieving wax prevention.

[0024] 2. A removable anti-wax cleaning tube is installed inside the insulation tube. As a physical barrier, even if a small amount of wax is released, the wax will preferentially adhere to the surface of the anti-wax cleaning tube rather than the surface of the delamination device. Wax removal can be achieved by periodically removing and cleaning the anti-wax cleaning tube.

[0025] 3. When waxy oil flows through the magnetic field formed by the permanent magnet sleeve, the wax crystals in the crude oil will be polarized and oriented under the action of the magnetic field, thereby inhibiting the formation of a three-dimensional network structure and promoting the aggregation of wax crystals into denser and smoother spherical particles. Spherical wax crystals are less likely to adhere and form scale on the metal pipe wall and the surface of the descaling device, and are more easily carried away by the flowing crude oil. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0027] Figure 1 This is a diagram showing the external shape of the anti-wax structure in this utility model;

[0028] Figure 2 This is a partial structural diagram of the present invention;

[0029] Figure 3 This is a structural diagram of the insulating tube in this utility model;

[0030] Figure 4 This is a structural diagram of the anti-wax cleaning tube in this utility model;

[0031] Figure 5 This is a structural diagram of the support ring in this utility model.

[0032] The attached diagram shows the markings and corresponding component names:

[0033] 102. Anti-wax cleaning tube, 103. Fixing ring, 104. Limiting clip, 105. Auxiliary handle, 106. Suspension hanging hole, 107. Thermal insulation shell, 108. Thermal insulation cavity, 109. Thermal insulation inner shell, 110. Permanent magnet sleeve, 111. External connecting thread, 111. Support ring, 112. Internal connecting thread, 113. Auxiliary support block, 114. Mounting support plate, 115. Fixing screw hole, 117. First connecting screw hole, 118. Fastening bolt. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0035] Throughout this specification, references to "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in connection with that embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "an embodiment," "an example," "an example," or "an example" appearing in various places throughout the specification do not necessarily refer to the same embodiment or example. Furthermore, specific features, structures, or characteristics can be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. Moreover, those skilled in the art will understand that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] In the description of this utility model, the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.

[0037] The terms "first," "second," etc., used in this utility model are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" as used herein, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0038] Example 1

[0039] like Figures 1-5 As shown, this embodiment 1 provides a wax-prevention structure, including a heat-insulating pipe and a wax-prevention cleaning pipe 102. In the working state, the upper end of the heat-insulating pipe is installed at the wellhead, and the lower end extends into the well. The wax-prevention cleaning pipe 102 is detachably connected to the inner side of the heat-insulating pipe, and in the working state, the wax-prevention cleaning pipe 102 is located outside the lower de-attachment device. The heat-insulating pipe addresses the root cause of wax buildup, while the wax-prevention cleaning pipe 102 provides structural maintenance, jointly preventing wax from adhering to the surface 2 of the downhole de-attachment device, ensuring the clearance of the moving parts of the de-attachment device, and allowing the de-attachment device to detach smoothly at the predetermined position, avoiding downhole stuck pipe accidents.

[0040] See Figures 1-3The system also includes a retaining ring 103. The anti-wax cleaning tube 102 is cylindrical, and the retaining ring 103 is engaged with the top of the anti-wax cleaning tube 102. At least two auxiliary handles 105 are provided on the outer periphery of the retaining ring 103, and these auxiliary handles 105 are evenly distributed on the top of the anti-wax cleaning tube 102, located at the upper top of the insulation tube. By providing a retaining ring 103 at the top of the anti-wax cleaning tube 102 and auxiliary handles 105 on the retaining ring 103, the anti-wax cleaning tube 102 can be easily removed during wax removal using the auxiliary handles 105.

[0041] See Figures 1-3 The bottom of the fixing ring 103 is provided with at least two limiting clips 104, which are evenly distributed at the lower end of the fixing ring 103. The limiting clips 104 engage with the top of the anti-wax cleaning tube 102. The bottom of the limiting clips 104 is lower than the bottom of the auxiliary handle 105 and located at the upper end of the insulation tube. Through the stable engagement of the limiting clips 104 with the anti-wax cleaning tube 102, the cleaning tube is accurately positioned and reliably fixed, effectively preventing it from shifting or vibrating in the complex fluid environment downhole. The unique design of the bottom of the limiting clips 104 being lower than the auxiliary handle 105 further improves the depth and stability of the engagement while ensuring that the handle operation is not interfered with.

[0042] See Figures 1-3 The auxiliary handle 105 is a long strip-shaped plate, and the free end of the auxiliary handle 105 is semi-circular. The long strip-shaped plate structure provides the operator with ample gripping space, making it easy to exert force for extraction. The semi-circular shape of the free end prevents the tool edge from scratching the operator and reduces the risk of damage to the wellhead equipment due to accidental impact.

[0043] See Figures 1-3 The free end of the auxiliary handle 105 is provided with a suspension hole 106, which is used to cooperate with the hook of the hook to extract the anti-wax cleaning tube 102. By providing the suspension hole 106, the operator can safely and smoothly complete the extraction operation using lifting equipment (such as a hook), ensuring the verticality and stability of the tubing string during the extraction process, and effectively preventing the tube from colliding with the wellhead or the insulation tube wall.

[0044] See Figures 1-3 The bottom of the anti-wax cleaning tube 102 is detachably connected to a support ring 11, and the top of the support ring 11 abuts against the bottom of the insulation tube. The support ring 11 provides a stable and reliable bottom support base for the anti-wax cleaning tube 102, thereby effectively preventing lateral swaying or axial displacement that may occur in the long tubing downhole.

[0045] See Figure 1 and Figure 5 The support ring 11 is annular in shape, and its inner side is provided with an internal thread 112. The bottom of the anti-wax cleaning tube 102 is provided with an external thread 111 that can be screwed into the internal thread 112, thus connecting the support ring 11 to the bottom of the anti-wax cleaning tube 102. Through the precise engagement of the internal and external threads, a strong and reliable rigid connection is formed between the support ring 11 and the anti-wax cleaning tube 102. The detachable feature facilitates quick disassembly and assembly during maintenance operations, improving the convenience of cleaning tube inspection and cleaning operations.

[0046] See Figure 1 and Figure 5 The support ring 11 is circular in shape, and several threaded holes are provided on its outer side wall. These threaded holes are evenly distributed in a circle. Several threaded holes radially aligned with the threaded holes are evenly distributed at the bottom of the anti-wax cleaning tube 102. Connecting screws pass through the threaded holes and their corresponding holes in sequence to connect the support ring 11 to the bottom of the anti-wax cleaning tube 102. By fitting the support ring 11 onto the bottom of the anti-wax cleaning tube 102 and connecting it with several connecting screws, a strong and reliable rigid connection is formed between the support ring 11 and the anti-wax cleaning tube 102. The detachable feature facilitates quick disassembly and assembly during maintenance, improving the convenience of cleaning tube inspection and cleaning operations.

[0047] See Figure 1 and Figure 5 Several auxiliary support blocks are arranged on the outer periphery of the support ring 11. These auxiliary support blocks are evenly distributed in a circle and protrude outwards from the support ring 11. The top of each auxiliary support block abuts against the bottom of the insulation tube. By providing several auxiliary support blocks on the outer periphery of the support ring 11, deformation of the anti-wax structure due to its own weight or fluid impact is prevented, thus improving the structural integrity and reliability under harsh working conditions.

[0048] See Figure 1 and Figure 5 The auxiliary support block is located on top of the support ring 11, and the top of the auxiliary support block is a plane. By making the top of the support ring 11 a plane, the contact area between the auxiliary support block and the insulation tube is increased, ensuring the stability of the device.

[0049] See Figures 1-3The heat-insulating tube includes a heat-insulating outer shell 107, a heat-insulating cavity 108, and a heat-insulating inner shell 109. The heat-insulating inner shell 109 is sealed to the inside of the heat-insulating outer shell 107, and the heat-insulating cavity 108 is located between the heat-insulating outer shell 107 and the heat-insulating inner shell 109. Utilizing the low thermal conductivity of the still air inside the heat-insulating cavity 108, the fluid temperature inside the anti-wax cleaning tube 102 is effectively maintained above the wax crystal precipitation point, fundamentally inhibiting the condensation and adhesion of paraffin wax on the surfaces of internal components such as the decoction device.

[0050] See Figures 1-3 The thickness of the thermal insulation cavity 108 is 16mm-20mm.

[0051] See Figures 1-3 The system also includes a permanent magnet sleeve 110. The top and bottom of the inner side of the insulation tube are provided with convex rings, which protrude towards the axis of the insulation tube. The top and bottom of the permanent magnet sleeve 110 abut against the corresponding convex rings. When wax-rich oil flows through the magnetic field formed by the permanent magnet sleeve 110, the wax crystals in the crude oil will be polarized and oriented under the action of the magnetic field, thereby inhibiting the formation of a three-dimensional network structure and promoting the aggregation of wax crystals into denser, smoother spherical particles. These spherical wax crystals are less likely to adhere and form scale on the metal tube wall and the surface of the descaling device, and are instead more easily carried away by the flowing crude oil.

[0052] See Figures 1-3 The system also includes at least two mounting plates 114, which are evenly distributed in a circular pattern on the top of the insulation pipe. One end of each mounting plate 114 is connected to the top of the insulation pipe by a fastening bolt 118, and the other end has several fixing screw holes 115. The mounting bolts are sequentially screwed into the fixing screw holes 115 and the threaded holes located at the top of the oil well, thus connecting the insulation pipe to the top of the oil well. By evenly distributing the mounting plates 114 in a circular pattern, the load is ensured to be uniformly distributed, preventing pipe eccentricity and ensuring that the entire anti-wax system maintains its designed coaxiality and sealing performance at the wellhead for a long period of time.

[0053] See Figure 3 The top of the insulation pipe is provided with a first connecting screw hole 117, and the mounting plate 114 is provided with a second connecting screw hole. The fastening bolt 118 is screwed into the second connecting screw hole and the first connecting screw hole 117 in sequence to connect the mounting plate 114 to the top of the insulation pipe.

[0054] During installation, the mounting plate 114 is first installed with bolts through the fixing screw holes 115 to facilitate installation at the wellhead. The top of the heat insulation shell 107 is connected and fixed to the mounting plate 114 by fastening bolts 118. The fixing ring and the connecting thread are connected to provide support for the bottom of the heat insulation shell 107. The auxiliary support block 113 facilitates the rotation of the fixing ring. The auxiliary support block 113 is fixed when it contacts the bottom of the heat insulation shell 107.

[0055] Example 2

[0056] This embodiment 2 provides an anti-wax descaling device, including the aforementioned anti-wax structure.

[0057] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A paraffin control structure, characterized by, include: In operation, the upper end of the insulation pipe is installed at the wellhead, and the lower end extends into the well. The anti-wax cleaning tube is detachably connected to the inside of the insulation tube. In the working state, the anti-wax cleaning tube is located outside the lower de-hanger.

2. The paraffin control structure of claim 1, wherein, It also includes a retaining ring. The anti-wax cleaning tube is in the shape of a round tube. The retaining ring is snapped onto the top of the anti-wax cleaning tube. At least two auxiliary handles are provided on the outer periphery of the retaining ring. The auxiliary handles are evenly distributed on the top of the anti-wax cleaning tube and are located at the top upper end of the insulation tube.

3. The paraffin control structure of claim 2, wherein, The bottom of the fixing ring is provided with at least two limiting clips, which are evenly distributed at the lower end of the fixing ring. The limiting clips are engaged with the top of the anti-wax cleaning tube. The bottom of the limiting clips is lower than the bottom of the auxiliary handle and located at the upper end of the heat insulation tube.

4. The paraffin control structure of claim 2, wherein, The auxiliary handle is in the shape of a long strip plate, and the free end of the auxiliary handle is in the shape of a semi-circular arc.

5. The paraffin control structure of claim 2, wherein, The free end of the auxiliary handle is provided with a suspension hole, which is used to cooperate with the hook of the hook to extract the anti-wax cleaning tube.

6. The paraffin control structure of claim 2, wherein, The bottom of the anti-wax cleaning tube is detachably connected to a support ring, and the top of the support ring abuts against the bottom of the insulation tube.

7. The anti-wax structure according to claim 6, characterized in that, The support ring is circular in shape, and the inner side of the support ring is provided with an internal thread. The bottom of the anti-wax cleaning tube is provided with an external thread that can be screwed into the internal thread, and the support ring is connected to the bottom of the anti-wax cleaning tube.

8. The paraffin control structure of claim 6, wherein, The support ring is circular and is fitted onto the bottom of the anti-wax cleaning tube. Several threaded holes are provided on the outer wall of the support ring, and the threaded holes are evenly distributed in a circle. Several threaded holes that are radially aligned with the threaded holes are evenly distributed on the bottom of the anti-wax cleaning tube. The connecting screw passes through the threaded holes and the corresponding threaded holes in sequence to connect the support ring to the bottom of the anti-wax cleaning tube.

9. The paraffin control structure according to any one of claims 6 to 8, wherein Several auxiliary support blocks are provided on the outer periphery of the support ring. The auxiliary support blocks are evenly distributed in a circle and protrude outward from the support ring. The top of the auxiliary support block abuts against the bottom of the insulation tube.

10. The paraffin control structure of claim 9, wherein, The auxiliary support block is located at the top of the support ring, and the top of the auxiliary support block is a plane.

11. The anti-wax structure according to claim 1, characterized in that, The insulation tube includes an insulation outer shell, an insulation cavity, and an insulation inner shell. The insulation inner shell is sealed to the inside of the insulation outer shell, and the insulation cavity is located between the insulation outer shell and the insulation inner shell.

12. The paraffin control structure of claim 11, wherein, The thickness of the thermal insulation cavity is 16mm-20mm.

13. The paraffin control structure of claim 11, wherein, It also includes a permanent magnet sleeve, and the top and bottom of the inner side of the insulation tube are provided with convex rings, which protrude toward the axis of the insulation tube. The top and bottom of the permanent magnet sleeve abut against the corresponding convex rings.

14. The anti-wax structure according to claim 11, characterized in that, It also includes at least two mounting plates, which are evenly distributed in a circle on the top of the insulation pipe. One end of each mounting plate is connected to the top of the insulation pipe by a fastening bolt, and the other end is provided with several fixing screw holes. The mounting bolts are screwed into the fixing screw holes and the threaded holes located at the top of the oil well in sequence to connect the insulation pipe to the top of the oil well.

15. A wax-resistant delamination device, characterized in that, Includes the anti-wax structure as described in any one of claims 1-14.

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