Drawing anti-falling device

Abstract

The utility model relates to the technical field of oil pipe lining pipe drawing equipment, and discloses a drawing anti-falling device which comprises a drawing machine used for drawing an oil pipe lining pipe, the drawing machine comprises a base, a drawing fixing assembly and an end fixing assembly, and the drawing fixing assembly and the end fixing assembly are located on the base. The drawing fixing assembly clamps the oil pipe lining pipe through cooperation of a drawing fixing head and a locking sleeve, and one end of the oil pipe lining pipe is fixed. The end fixing assembly clamps the oil pipe lining pipe through cooperation of an end fixing plug and a fixing disc, and the other end of the oil pipe lining pipe is fixed. The two ends of the oil pipe lining pipe are doubly clamped through the drawing fixing assembly and the end fixing assembly, a circumferential uniform fixing structure is formed, circumferential uniform fixing force is provided, and reverse resistance can be formed when the oil pipe lining pipe tends to slip due to tensile deformation by designing the anti-disengaging thorns and the fixing thorns, so that the oil pipe lining pipe is prevented from slipping off. And the oil pipe lining pipe is further prevented from loosening and slipping in the drawing technical operation process.

Description

Technical Field

[0001] This utility model relates to the technical field of oil pipe liner pulling equipment, specifically to a pulling anti-detachment device. Background Technology

[0002] As a crucial consumable in oil and gas exploration and related fields, oil pipes often require an inner liner to extend their service life. The liner pulling process is a key step in this process. Commonly used inner liners are made of polyethylene. Before pulling, the initial diameter of the liner is slightly larger than the inner diameter of the oil pipe. During the pulling process, specialized equipment is used to apply tension to the liner, causing it to stretch and deform axially while reducing its diameter radially. Once the liner diameter has reduced to the appropriate size, it is inserted into the oil pipe. As the external force is removed, the liner, due to its elastic recovery properties, gradually springs back, tightly adhering to the inner wall of the oil pipe and forming a robust protective barrier.

[0003] Before starting the tubing liner pulling operation, operators need to install both ends of the liner onto the pulling equipment. In the existing liner pulling process, uneven stress along the circumference of the liner can lead to deformation or damage, and even liner detachment during the pulling process, potentially causing safety accidents. Therefore, a pulling anti-detachment device is needed to improve the reliability and applicability of the pulling equipment. Utility Model Content

[0004] This utility model provides a pull-out prevention device to solve at least one of the above-mentioned technical problems.

[0005] The technical solution adopted by this utility model is as follows: a pull-out prevention device, including a pull-out machine for pulling out an inner liner of an oil pipe, the pull-out machine including a base and a pull-out fixing assembly and an end fixing assembly located on the base; the pull-out fixing assembly includes a pull-out fixing rod connected to the pull-out machine, the end of the pull-out fixing rod having a pull-out fixing head that extends into the inner liner of the oil pipe, and a locking sleeve sleeved on the outside of the pull-out fixing head to clamp the inner liner of the oil pipe through the cooperation of the pull-out fixing head and the locking sleeve; the end fixing assembly includes a fixing cylinder and a fixing disc that allows the inner liner of the oil pipe to pass through, and an end fixing plug extending into the inner liner of the oil pipe connected to the fixing cylinder to clamp the inner liner of the oil pipe through the cooperation of the end fixing plug and the fixing disc.

[0006] In a preferred embodiment, the pull-fixing head includes an insertion section and an anti-detachment section. The diameter of the insertion section increases from the end towards the anti-detachment section, and the diameter of the anti-detachment section decreases from the insertion section towards the end. Anti-detachment spikes are formed on the outer periphery of the anti-detachment section, and the diameter of the anti-detachment spikes increases from the insertion section towards the anti-detachment section.

[0007] In a preferred embodiment, the inner diameter of the locking sleeve decreases from the end facing the pull-out fixing head to the other end.

[0008] In a preferred embodiment, the drawing machine further includes a drawing power rod, which is rotatably connected to the drawing fixing rod.

[0009] In a preferred embodiment, the end fixing plug includes an insertion section and a connecting section, wherein the diameter of the insertion section increases from the end to the connecting section.

[0010] In a preferred embodiment, fixing spikes are formed on the inner peripheral wall of the fixing disc, and the diameter of the fixing spikes increases from one end facing the end fixing plug to the other end.

[0011] In a preferred embodiment, the base has a cylinder fixing plate and a disc fixing plate arranged in parallel, and the cylinder fixing plate and the disc fixing plate have coaxial mounting holes so that the end fixing plug and the fixing disc are coaxial.

[0012] In a preferred embodiment, the base has a support seat and a support plate.

[0013] In a preferred embodiment, reinforcing ribs are provided at the connection points between the cylinder fixing plate and the disc fixing plate and the base.

[0014] In a preferred embodiment, a guide limit seat is provided at a parallel position to the disc fixing plate.

[0015] Due to the adoption of the above technical solution, the beneficial effects achieved by this utility model are as follows:

[0016] 1. In a preferred embodiment of this utility model, the inner liner of the oil pipe is double-clamped at both ends by a pull-out fixing component and an end fixing component, forming a circumferentially uniform fixing structure. Through the cooperation of the pull-out fixing head and the anti-detachment section, and the decreasing inner diameter design of the pull-out fixing head, a gradually tightening and uniform clamping force can be formed on the inner liner of the oil pipe, thereby fixing one end of the inner liner of the oil pipe; through the synergistic action of the connecting section and the fixing plate, the other end of the inner liner of the oil pipe is tightly fixed under the push of the cylinder, and both ends of the inner liner of the oil pipe are subjected to a uniform clamping force.

[0017] 2. As a preferred embodiment of this utility model, anti-detachment spikes are designed on the outer periphery of the anti-detachment section, and fixing spikes are designed on the inner peripheral wall of the fixing plate. When the oil pipe liner is stretched and deformed and shows a tendency to slip, the anti-detachment spikes and fixing spikes can hook the oil pipe liner and form a reverse resistance. The anti-detachment spikes cooperate with the pull-out fixing head, and the fixing spikes cooperate with the end fixing plug, thereby preventing the oil pipe liner from falling off.

[0018] 3. As a preferred embodiment of this utility model, the design of having the diameter of the end of the extension section smaller than the diameter of the inner liner of the oil pipe facilitates the quick positioning of the fixed head into the inner liner of the oil pipe.

[0019] 4. As a preferred embodiment of this utility model, by setting a rotatable connection between the pulling power rod and the pulling fixed rod, the pulling fixed rod can rotate flexibly without being restricted by the angle, thereby reducing the installation time and operation difficulty of the oil pipe liner.

[0020] 5. In a preferred embodiment of this utility model, the inner liner of the oil pipe is supported by a support base, which provides axial support to the inner liner of the oil pipe, so that the inner liner of the oil pipe remains horizontal during the pulling operation.

[0021] 6. As a preferred embodiment of this utility model, by providing reinforcing ribs at the connection between the cylinder fixing plate and the base, and at the connection between the disc fixing plate and the base, a stable support structure can be formed.

[0022] 7. As a preferred embodiment of this utility model, by setting a guide limit seat, the inner liner of the oil pipe is limited in the radial direction, so that the inner liner of the oil pipe moves horizontally in the radial direction during the pulling operation, while bearing a certain radial and axial load. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of a pull-out anti-detachment device according to an embodiment of the present utility model;

[0025] Figure 2 This is an enlarged view of the pull-out fixing assembly structure according to an embodiment of the present utility model;

[0026] Figure 3 This is an enlarged view of the first position structure of one of the end fixing components according to an embodiment of the present utility model;

[0027] Figure 4 This is an enlarged view of the second position structure of one of the end fixing components according to an embodiment of the present utility model;

[0028] Figure 5 This is an enlarged view of another end fixing component first position structure according to an embodiment of the present utility model;

[0029] Figure 6 This is an enlarged view of another end fixing component second position structure according to an embodiment of the present utility model;

[0030] Figure 7This is a schematic diagram of the structure of the anti-detachment device before the pulling operation according to an embodiment of the present utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the anti-detachment pulling device according to an embodiment of the present utility model during the pulling operation.

[0032] Figure Labels

[0033] 1. Drawing machine; 11. Drawing power rod; 2. Base; 21. Support seat; 22. Support plate;

[0034] 3. Pull-out fixing assembly; 31. Pull-out fixing rod; 32. Pull-out fixing head; 321. Insertion section; 322. Anti-detachment section; 3221. Anti-detachment puncture; 33. Locking sleeve;

[0035] 4. End fixing assembly; 41. Fixing cylinder; 411. End fixing plug; 4111. Insertion section; 4112. Connecting section; 42. Fixing disc; 421. Fixing spike;

[0036] 5. Inner liner of the oil pipe;

[0037] 61. Cylinder fixing plate; 62. Disc fixing plate; 63. Reinforcing rib; 64. Guide limit seat. Detailed Implementation

[0038] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., 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 limitations on this utility model.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0042] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] A preferred embodiment, such as Figure 1 As shown, a pull-out prevention device includes a pull-out machine 1 for pulling out an inner liner tube 5 of an oil pipe. The pull-out machine 1 includes a base 2 and a pull-out fixing assembly 3 and an end fixing assembly 4 located on the base 2. The pull-out fixing assembly 3 clamps the inner liner tube 5 of the oil pipe through the cooperation of the pull-out fixing head 32 and the locking sleeve 33, thereby fixing one end of the inner liner tube 5. The end fixing assembly 4 clamps the inner liner tube 5 of the oil pipe through the cooperation of the end fixing plug 411 and the fixing plate 42, thereby fixing the other end of the inner liner tube 5. By double clamping both ends of the inner liner tube 5 of the oil pipe through the pull-out fixing assembly 3 and the end fixing assembly 4, a circumferentially uniform fixing structure is formed, providing a circumferentially uniform fixing force. Furthermore, by designing anti-detachment spikes 3221 and fixing spikes 421, when the inner liner tube 5 of the oil pipe shows a tendency to slip out due to tensile deformation, it can form a reverse resistance. Compared with the traditional single fixing method, it tightly fixes the inner liner tube 5 of the oil pipe, further preventing the inner liner tube 5 of the oil pipe from loosening or slipping during the pull-out operation.

[0044] Specifically, such as Figure 2As shown, the pull-fixing assembly 3 includes a pull-fixing head 32, which includes an insertion section 321 and an anti-detachment section 322. The diameter of the insertion section 321 increases from the end towards the anti-detachment section 322, facilitating the quick positioning of the pull-fixing head 32 into the inner liner of the oil pipe 5. The outer periphery of the anti-detachment section 322 is formed with anti-detachment thorns 3221 to increase friction. The diameter of the anti-detachment thorns 3221 increases from the insertion section 321 towards the anti-detachment section 322. The inner diameter of the locking sleeve 33 decreases from the end facing the pull-fixing head 32 to the other end. Through the cooperation of the pull-fixing head 32 and the anti-detachment section 322, when the pull-fixing head 32 is inserted into the locking sleeve 33 and clamps the inner liner of the oil pipe 5, the decreasing inner diameter of the fixing head can form a gradually tightening clamping force on the inner liner of the oil pipe 5 and form a circumferentially uniform fixing force.

[0045] Specifically, the end fixing component 4 has a first position and a second position, such as Figure 3 or Figure 5 As shown, in the first position, before the pulling operation begins, the operator prepares to install one end of the tubing liner 5 onto the end fixing assembly 4. The diameter of the insertion section 4111 increases from the end to the connecting section 4112. To facilitate the insertion of the end fixing plug 411 into the tubing liner 5, the inner circumferential wall of the fixing disc 42 is provided with fixing spikes 421. The diameter of the fixing spikes 421 increases from the end facing the end fixing plug 411 to the other end, which can increase the friction. The inner diameter of the fixing disc 42 can be as follows: Figure 3 , Figure 4 The nominal diameter shown can also be adopted as follows: Figure 5 , Figure 6 The variable diameter shown can be used in two ways: When using the standard diameter, the inner diameter of the connecting section 4112 and the fixed plate 42 can be used to press the inner tubing liner 5 between them, thereby fixing the end of the inner tubing liner 5; when using the variable diameter, the inner tubing liner 5 can be pressed between the insert section 4111 and the fixed plate 42, and the tightness of the connection can be improved by expanding the diameter of the end of the inner tubing liner 5. Figure 4 or Figure 6 As shown, in the second position, the operator passes the inner liner 5 of the oil pipe through the fixing plate 42 and connects it with the end fixing plug 411. The connecting section 4112 and the fixing plate 42 work together to tightly clamp the inner liner 5 under the push of the cylinder. Under the action of the fixing spike 421, when the inner liner of the oil pipe is stretched and deformed and shows a tendency to slip, the fixing spike 421 can hook the inner liner of the oil pipe and form a reverse resistance, which further prevents the inner liner 5 of the oil pipe from falling off.

[0046] like Figure 7As shown, by setting a rotating connection between the pulling power rod 11 and the pulling fixing rod 31, the pulling fixing rod 31 can rotate freely within a certain range. This allows for quick docking without precise adjustment of the axial angle between the pulling power rod 11 and the inner liner tube. The operator can hold the inner liner tube 5 with one hand and pull the pulling fixing rod 31 with the other to complete the "insertion-locking" installation action. This reduces the installation time and operational difficulty of the inner liner tube 5. Furthermore, the rotating connection reduces the wear rate of the contact surfaces between the pulling power rod 11 and the pulling fixing rod 31, extending the equipment's service life and reducing maintenance costs. The pulling fixing rod 31 and the inner liner tube 5 are supported by a support base 21. The support base 21 has an arc-shaped groove that matches the inner liner tube 5, ensuring that the inner liner tube 5 remains horizontal during the pulling operation and preventing tilting or displacement due to center of gravity shift. A support plate 22 prevents deformation of the base 2. The pulling fixing assembly 3 can also be placed on the support plate 22 before and after the pulling operation, facilitating subsequent operations by the operator.

[0047] like Figure 8 As shown, by mounting the fixed disc 42 on the disc fixing plate 62 and the fixed cylinder 41 on the cylinder fixing plate 61, the force-bearing area is increased, allowing the force to be evenly distributed, avoiding local stress concentration, and improving stability. By setting reinforcing ribs 63 at the connection points between the cylinder fixing plate 61 and the base 2, and at the connection points between the disc fixing plate 62 and the base 2, the stress generated by the fixed cylinder 41 and the fixed disc 42 during operation can be transmitted to the base 2 through the structure of the reinforcing ribs 63, avoiding stress concentration in localized areas at the connection points, forming a stable support structure, and improving the stability of the pulling operation. By setting the end fixing plug 411 and the fixing plate 42 to be coaxial, and by setting the guide limiting seat 64, the tubing liner 5 can move horizontally in the radial direction during the pulling operation, avoiding abnormal wear between the tubing liner 5 and the fixing assembly caused by angular deviation; the guide limiting seat 64 can also withstand certain radial and axial loads. When the tubing liner 5 is long, multiple support seats 21 can be set to ensure that the pulling fixing rod 31 and the axis of the tubing liner 5 are always coaxial. Any parts not described in this utility model can be achieved by adopting or referencing existing technologies.

[0048] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0049] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A drawing anti-detachment device, comprising a drawing machine (1) for drawing an inner liner tube (5) of an oil pipe, characterized in that, The drawing machine (1) includes a base (2) and a drawing fixing assembly (3) and an end fixing assembly (4) located on the base (2). The pulling and fixing assembly (3) includes a pulling and fixing rod (31) connected to the pulling machine (1). The end of the pulling and fixing rod (31) has a pulling and fixing head (32) that extends into the inner liner tube (5) of the oil pipe. A locking sleeve (33) is sleeved on the outside of the pulling and fixing head (32) to clamp the inner liner tube (5) of the oil pipe through the cooperation of the pulling and fixing head (32) and the locking sleeve (33). The end fixing assembly (4) includes a fixing cylinder (41) and a fixing plate (42) that allows the oil pipe liner (5) to pass through. The fixing cylinder (41) is connected to an end fixing plug (411) that extends into the oil pipe liner (5) so as to clamp the oil pipe liner (5) by the cooperation of the end fixing plug (411) and the fixing plate (42).

2. The pull-out prevention device according to claim 1, characterized in that, The pull-fixing head (32) includes an insertion section (321) and an anti-detachment section (322). The diameter of the insertion section (321) increases from the end towards the anti-detachment section (322), and the diameter of the anti-detachment section (322) decreases from the insertion section (321) towards the end. Anti-detachment spikes (3221) are formed on the outer periphery of the anti-detachment section (322), and the diameter of the anti-detachment spikes (3221) increases from the insertion section (321) towards the anti-detachment section (322).

3. The pull-out prevention device according to claim 2, characterized in that, The inner diameter of the locking sleeve (33) decreases from one end facing the pull-out fixing head (32) to the other end.

4. The pull-out prevention device according to claim 3, characterized in that, The drawing machine (1) also includes a drawing power rod (11), which is rotatably connected to the drawing fixing rod (31).

5. The pull-out prevention device according to claim 1, characterized in that, The end fixing plug (411) includes an insertion section (4111) and a connecting section (4112), the diameter of which increases from the end to the connecting section (4112).

6. The pull-out prevention device according to claim 5, characterized in that, Fixing spikes (421) are formed on the inner peripheral wall of the fixing disc (42), and the diameter of the fixing spikes (421) increases from one end facing the end fixing plug (411) to the other end.

7. The pull-out prevention device according to claim 1, characterized in that, The base (2) has a cylinder fixing plate (61) and a disc fixing plate (62) arranged in parallel. The cylinder fixing plate (61) and the disc fixing plate (62) have coaxial mounting holes so that the end fixing plug (411) and the fixing disc (42) are coaxial.

8. The pull-out prevention device according to claim 1, characterized in that, The base (2) has a support seat (21) and a support plate (22).

9. The pull-out prevention device according to claim 7, characterized in that, The cylinder fixing plate (61) and the disc fixing plate (62) are both provided with reinforcing ribs (63) at the connection points with the base (2).

10. The pull-out prevention device according to claim 9, characterized in that, The disk fixing plate (62) is provided with a guide limit seat (64) at a parallel position.

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