Oil pipe butt joint device and continuous oil pipe

Abstract

The utility model relates to an oil pipe butt joint device and a continuous oil pipe, and the oil pipe butt joint device comprises a connecting pipe which comprises a first end and a second end which are oppositely arranged in the axial direction of the connecting pipe; the first connector is arranged at the first end of the connecting pipe in a sleeving mode, first connecting teeth are arranged on the first connector, and the first connector is used for being connected with a first oil pipe; the anti-torsion ring is arranged on the peripheral side of the connecting pipe in a sleeving mode, second connecting teeth are arranged at the end, facing the first connector, of the anti-torsion ring, and the end, away from the first connector, of the anti-torsion ring is connected with the connecting pipe; the second connector is arranged at the second end of the connecting pipe in a sleeving mode and used for being connected with a second oil pipe; the first connecting teeth are connected with the second connecting teeth in a meshed mode so that torque can be transmitted under the action of shearing force between the first connecting teeth and the second connecting teeth. The oil pipe butting device can be used for quickly and reliably butting two sections of oil pipes at a wellhead, effectively transmitting torque, realizing fishing, drilling and grinding operations in special operations, and has the advantages of simplicity in operation and high operation efficiency.

Description

Technical Field

[0001] This application relates to the field of downhole tool technology, and in particular to a tubing connection device and coiled tubing. Background Technology

[0002] Coiled tubing technology has been widely used in oil and gas field development, well workover, and well completion operations. Coiled tubing operations offer advantages such as high efficiency, flexibility, and low cost, and can adapt to various complex operating conditions. However, in actual operations, due to variations in well depth, well conditions, and operational requirements, it is often necessary to connect two sections of coiled tubing to meet different operational needs.

[0003] In related technologies, existing coiled tubing connectors suffer from complex operation and inability to transmit torque. As oil and gas field development moves towards deeper, ultra-deep, and complex wells, the requirements for coiled tubing connectors are becoming increasingly stringent. Especially in specialized operations such as horizontal wells, extended reach wells, and multi-branch wells, not only are fast and reliable docking methods necessary, but the connectors also need to be capable of transmitting torque to adapt to complex downhole conditions. Utility Model Content

[0004] This application provides a tubing connection device and coiled tubing to solve the technical problem that existing coiled tubing connection devices cannot transmit torque, thus failing to adapt to complex downhole conditions.

[0005] This application provides an oil pipe connection device for connecting a first oil pipe and a second oil pipe. The oil pipe connection device includes:

[0006] A connecting pipe, including a first end and a second end disposed opposite to each other in its axial direction;

[0007] The first connector is sleeved on the first end of the connecting pipe. The first connector is provided with a first connecting tooth and is used to connect the first oil pipe.

[0008] An anti-torsion ring is sleeved around the periphery of the connecting pipe. The end of the anti-torsion ring facing the first connector is provided with a second connecting tooth, and the end of the anti-torsion ring away from the first connector is connected to the connecting pipe.

[0009] The second connector is sleeved on the second end of the connecting pipe and is used to connect the second oil pipe.

[0010] The first connecting tooth meshes with the second connecting tooth to transmit torque under the shear force between the first connecting tooth and the second connecting tooth.

[0011] In one possible implementation, a boss is provided on the periphery of the connecting pipe, and a groove is provided at the end of the boss near the anti-torsion ring, the groove extending along the axial direction of the connecting pipe.

[0012] An anti-torsion ring is disposed between the first joint and the boss. A protrusion is provided at the end of the anti-torsion ring away from the first joint, and the protrusion is connected to the groove.

[0013] In one possible implementation, the tubing connection device includes a nut that is fitted onto the connecting pipe. The nut includes a connecting end and a limiting end that are disposed opposite each other in its axial direction. The connecting end of the nut is detachably connected to the first connector.

[0014] The limiting end of the nut is slidably connected to the connecting pipe and is snapped into the boss.

[0015] In one possible implementation, the connecting end of the nut is provided with a first internal thread, the end of the first connector near the anti-torsion ring is provided with a connecting seat, the nut is sleeved on the connecting seat, and the connecting seat is provided with a first external thread that connects with the first internal thread.

[0016] In one possible implementation, the limiting end of the nut is provided with a limiting ring, which extends from the inner wall of the nut toward the connecting pipe, and the boss is provided with a limiting step that connects to the limiting ring.

[0017] In one possible implementation, a first connecting tooth is disposed on a connecting seat, and a first set screw is disposed on the periphery of the nut. The axial direction of the first set screw intersects with the axial direction of the connecting pipe, and the first set screw abuts against the periphery of the connecting seat.

[0018] In one possible implementation, the first end of the connecting pipe is provided with a conical surface, and the connecting seat is provided with a conical hole that connects to the conical surface.

[0019] In one possible implementation, the second connector is provided with a second internal thread, and the second end of the connecting pipe is provided with a second external thread that connects with the second internal thread.

[0020] In one possible implementation, a first sealing ring is provided between the first connector and the connecting pipe; and / or

[0021] A second sealing ring is provided between the second connector and the connecting pipe.

[0022] Secondly, this application provides a continuous tubing, including a first tubing, a second tubing, and the tubing connection device as described above.

[0023] The technical solutions provided in this application have the following advantages compared with the prior art:

[0024] The tubing docking device and coiled tubing provided in this application embodiment allow for rapid wellhead docking by rotating only a small angle during wellhead docking operations, enabling the first and second connecting teeth to mesh. When the first and second connecting teeth mesh, the contact area between the tooth surfaces is large and uniform, transmitting torque through the shear force on the tooth sides. This toothed meshing avoids the point contact problems of traditional threaded connections, resulting in more uniform load distribution and significantly improved torsional strength. The torque of the first tubing can be transmitted to the first connector, which then transmits torque through the meshing of the first and second connecting teeth, further transmitting it to the connecting pipe, and finally to the second tubing via the second connector. The tubing docking device provided in this application embodiment has high torsional strength, enabling fishing and drilling operations in specialized applications. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0028] Figure 1 This is a schematic diagram of the structure of an oil pipe docking device provided in an embodiment of this application;

[0029] Figure 2 for Figure 1 A perspective view of the first joint of the tubing connection device;

[0030] Figure 3 for Figure 1 A perspective view of the anti-torsion ring of the tubing connection device is shown.

[0031] Figure 4 for Figure 1 A perspective view of the connecting pipes of the oil pipe docking device is shown;

[0032] Figure 5 for Figure 1 Enlarged diagram of section A in the middle;

[0033] Figure 6 for Figure 3 The front view of the anti-torsion ring is shown;

[0034] Figure 7 for Figure 1 Enlarged diagram of section B;

[0035] Figures 8-10 This is a schematic diagram of the connection process of the tubing docking device at the wellhead.

[0036] Explanation of reference numerals in the attached figures:

[0037] 100. Pipeline docking device;

[0038] 1. Connecting pipe; 11. First end; 111. Conical surface; 12. Second end; 121. Second external thread; 13. Boss; 131. Groove; 1311. First abutting side; 1312. First abutting bottom surface; 132. Limiting step;

[0039] 2. First connector; 21. First connecting tooth; 22. Connecting seat; 221. First external thread; 222. Tapered hole; 223. First sealing ring; 23. Channel;

[0040] 3. Anti-torsion ring; 31. Second connecting tooth; 32. Protrusion; 321. Second abutting side; 322. Second abutting bottom surface;

[0041] 4. Second connector; 41. Second internal thread; 42. Second set screw; 43. Second sealing ring;

[0042] 5. Nut; 51. Connecting end; 511. First internal thread; 52. Limiting end; 521. Limiting ring; 53. First set screw;

[0043] 200, First oil pipe; 300, Second oil pipe. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0046] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] In related technologies, due to variations in well depth, well conditions, and operational requirements, it is often necessary to connect two sections of coiled tubing to meet different operational needs. Traditional coiled tubing connection methods typically employ welding, threaded connections, or quick-rotor connectors.

[0048] While welding can achieve high connection strength, it suffers from complex operation, long processing time, and inability to transmit torque. Threaded connections, although capable of transmitting torque, also have the following drawbacks: 1) Slow docking speed: Threaded connections require precise alignment and multiple rotations, making operation cumbersome; 2) Poor adaptability: Threaded connections are typically only suitable for docking tubing of equal diameter, and cannot accommodate the docking needs of tubing of unequal diameter; 3) Prone to damage: Threaded connections are easily worn after repeated disassembly and installation, affecting connection strength and sealing performance. Existing rotary docking devices lack torque transmission capabilities. For extended reach wells, branch wells, and long horizontal wells, if the coiled tubing after docking cannot transmit torque, drilling, fishing, and tool insertion operations cannot be performed.

[0049] To address the technical problem that existing coiled tubing connection devices cannot transmit torque, thus failing to adapt to complex downhole conditions, this application provides a tubing connection device and coiled tubing. This tubing connection device enables rapid and reliable connection of two tubing sections at the wellhead and can effectively transmit torque. It can be used for fishing and drilling operations in special operations and has the advantages of simple operation and high efficiency.

[0050] Figures 1 to 3 This application provides an oil pipe docking device 100 for connecting a first oil pipe 200 and a second oil pipe 300. The oil pipe docking device 100 includes a connecting pipe 1, a first connector 2, an anti-torsion ring 3, and a second connector 4. The connecting pipe 1 includes a first end 11 and a second end 12 disposed opposite to each other in its axial direction. The first connector 2 is sleeved on the first end 11 of the connecting pipe 1 and is provided with a first connecting tooth 21. The first connector 2 is used to connect the first oil pipe 200. The anti-torsion ring 3 is sleeved on the periphery of the connecting pipe 1 and is provided with a second connecting tooth 31 at the end of the anti-torsion ring 3 facing the first connector 2. The end of the anti-torsion ring 3 away from the first connector 2 is connected to the connecting pipe 1. The second connector 4 is sleeved on the second end 12 of the connecting pipe 1 and is used to connect the second oil pipe 300. The first connecting tooth 21 and the second connecting tooth 31 are engaged to transmit torque under the shear force between the first connecting tooth 21 and the second connecting tooth 31.

[0051] Understandably, during wellhead docking operations, a small rotation angle is sufficient to achieve engagement between the first connecting tooth 21 and the second connecting tooth 31, facilitating rapid wellhead docking. When the first connecting tooth 21 and the second connecting tooth 31 are engaged, the contact area between the tooth surfaces is large and uniform, transmitting torque through the shear force on the tooth sides. Tooth meshing avoids the point contact problem of traditional threaded connections, resulting in a more uniform load distribution and significantly improved torsional strength. The torque of the first tubing 200 can be transmitted to the first connector 2. The first connector 2 achieves torque transmission through the engagement of the first connecting tooth 21 and the second connecting tooth 31, which in turn transmits the torque to the connecting pipe 1, and finally to the second tubing 300 through the second connector 4. The tubing docking device 100 provided in this embodiment has high torsional strength and can be used for fishing and drilling operations in special operations (such as extended reach wells and branch wells).

[0052] The end of the first connector 2 furthest from the anti-torsion ring 3 can be connected to existing standard continuous tubing connectors, such as grooved, riveted, or slip-type connectors, as well as combinations of these structures. In other words, the first connector 2 can be connected to the first tubing 200 via grooved, riveted, or slip-type connectors. Similarly, the end of the second connector 4 furthest from the anti-torsion ring 3 can also be connected to existing standard continuous tubing connectors. The second connector 4 can be connected to the second tubing 300 via grooved, riveted, or slip-type connectors. The outer diameters of the first tubing 200 and the second tubing 300 can be the same or different. Thus, the tubing docking device 100 provided in this embodiment can be used for docking tubing of equal diameters as well as for docking tubing of unequal diameters, offering strong adaptability.

[0053] Optionally, the tooth shape of the first connecting tooth 21 and the second connecting tooth 31 can be set as straight teeth, helical teeth or trapezoidal teeth, etc., and this application does not impose specific restrictions on this.

[0054] In some embodiments, such as Figure 3 and Figure 4 As shown, a boss 13 is provided on the periphery of the connecting pipe 1, and a groove 131 is provided at the end of the boss 13 near the anti-torsion ring 3, extending along the axial direction of the connecting pipe 1. The anti-torsion ring 3 is disposed between the first connector 2 and the boss 13, and a protrusion 32 is provided at the end of the anti-torsion ring 3 away from the first connector 2, which is engaged with the groove 131. Specifically, the groove 131 is formed by a first abutting side 1311 and a first abutting bottom 1312, and the protrusion 32 includes a second abutting side 321 and a second abutting bottom 322 that intersect each other. The first abutting side 1311 and the second abutting side 321 are engaged, and the first abutting bottom 1312 and the second abutting bottom 322 are engaged. Through the engagement of the protrusion 32 and the groove 131, torque transmission between the anti-torsion ring 3 and the connecting pipe 1 can be achieved. The contact area between the first abutting side 1311 and the second abutting side 321 is large and uniform. The torque is transmitted through the shear force between the first abutting side 1311 and the second abutting side 321, resulting in a more uniform load distribution and a significant improvement in torsional strength.

[0055] Optionally, the boss 13 and the connecting pipe 1 can be integrally formed, and the boss 13 and the connecting pipe 1 can also be connected by means of snap-fit ​​and slot structure, threaded connection structure, etc.

[0056] Furthermore, multiple grooves 131 and multiple protrusions 32 can be provided. The multiple protrusions 32 are evenly arranged along the circumference of the anti-torsion ring 3. The multiple protrusions 32 and multiple grooves 131 are respectively provided one-to-one, thereby improving the uniformity of load distribution and significantly improving the torsional strength.

[0057] In some embodiments, such as Figure 1As shown, the oil pipe docking device 100 includes a nut 5, which is sleeved on the connecting pipe 1. The nut 5 includes a connecting end 51 and a limiting end 52 disposed opposite to each other in its axial direction. The connecting end 51 of the nut 5 is detachably connected to the first connector 2; the limiting end 52 of the nut 5 is slidably connected to the connecting pipe 1 and is engaged with the boss 13. The detachable connection between the nut 5 and the first connector 2 allows the nut 5 to have a first state of being separated from the first connector 2, or a second state of being connected to the first connector 2. In the second state, the nut 5 can reciprocate along the axial direction of the connecting pipe 1. Understandably, before connecting the first oil pipe 200, the nut 5 is removed from the first connector 2, and the limiting end 52 of the nut 5 moves away from the first connector 2 relative to the connecting pipe 1. Then, the first connector 2 is connected to the first oil pipe 200, and the first connecting tooth 21 of the first connector 2 is engaged with the second connecting tooth 31 of the connecting pipe 1. Then, the connecting end 51 of the nut 5 is connected to the first connector 2 to reach the second state. At this time, since the limiting end 52 of the nut 5 is engaged with the boss 13, the nut 5 can apply axial tension to the connecting pipe 1, so that the first connecting tooth 21 and the second connecting tooth 31, as well as the groove 131 and the boss 32, fit tightly together, eliminating assembly gaps, increasing the rigidity of the anti-torsion structure, and at the same time, it can realize the suspension weight and bear the tensile load.

[0058] The detachable connection between the connecting end 51 of the nut 5 and the first connector 2 can be achieved using any of the following connection methods: snap-fit ​​and slot connection, pin connection, threaded connection, etc. For example, if a snap-fit ​​and slot connection is used, the inner wall of the nut 5 can be provided with multiple snaps, and the outer wall of the first connector 2 can be provided with multiple slots, with each snap and slot corresponding to the other. If a pin connection is used, the nut 5 can be provided with a first pin hole, and the first connector 2 can be provided with a second pin hole, with the pin fitting into the first and second pin holes.

[0059] In one exemplary embodiment, such as Figure 2 and Figure 5 As shown, the connecting end 51 of the nut 5 is provided with a first internal thread 511, and the end of the first connector 2 near the anti-torsion ring 3 is provided with a connecting seat 22. The nut 5 is sleeved on the connecting seat 22, and the connecting seat 22 is provided with a first external thread 221 that connects with the first internal thread 511. By rotating the nut 5, quick disassembly and quick connection between the nut 5 and the first connector 2 can be achieved. The connection can be achieved without rotating the first oil pipe 200 or the second oil pipe 300, thereby improving the ease of connection.

[0060] Optionally, the connecting seat 22 and the anti-torsion ring 3 can be integrally formed, and the connecting seat 22 and the anti-torsion ring 3 can also be connected by means of snap-fit ​​and slot structure, threaded connection structure, etc.

[0061] In one exemplary embodiment, such as Figure 1 and Figure 6 As shown, the limiting end 52 of the nut 5 is provided with a limiting ring 521, which extends from the inner wall of the nut 5 toward the connecting pipe 1. The boss 13 is provided with a limiting step 132 that engages with the limiting ring 521. When the nut 5 is connected to the first connector 2 and reaches the second state, the limiting ring 521 and the limiting step 132 engage. On the one hand, the limiting step 132 limits the limiting ring 521; on the other hand, the nut 5 can apply axial tension to the connecting pipe 1, so that the first connecting tooth 21 and the second connecting tooth 31, as well as the groove 131 and the boss 32, fit tightly together, thereby eliminating assembly gaps, increasing the rigidity of the anti-torsional structure, and thus enabling the suspension of weight and bearing of tensile loads.

[0062] In some embodiments, such as Figure 5 As shown, the first connecting tooth 21 is disposed on the connecting seat 22, and the nut 5 is provided with a first set screw 53 on its periphery. The axial direction of the first set screw 53 intersects with the axial direction of the connecting pipe 1, and the first set screw 53 abuts against the periphery of the connecting seat 22. By applying a radial clamping force to the connecting seat 22 through the first set screw 53, the connection stability between the connecting seat 22 and the nut 5 can be increased.

[0063] Multiple first set screws 53 can be provided, and the multiple first set screws 53 are evenly arranged along the circumferential direction of the nut 5, thereby improving the uniformity of load distribution and further enhancing the torsional strength.

[0064] In some embodiments, such as Figure 1 and Figure 6 As shown, the first end 11 of the connecting pipe 1 is provided with a conical surface 111, and the connecting seat 22 is provided with a conical hole 222 that connects to the conical surface 111. By providing the conical surface 111 and the conical hole 222, the conical surface 111 plays a guiding role in the process of connecting the connecting pipe 1 and the first connector 2, which facilitates the connection and ensures the alignment of the first oil pipe 200 and the connecting pipe 1.

[0065] In some embodiments, such as Figure 1 and Figure 7 As shown, the second connector 4 is provided with a second internal thread 41, and the second end 12 of the connecting pipe 1 is provided with a second external thread 121 that connects to the second internal thread 41. It can be understood that the second connector 4 can be connected to the second oil pipe 300. Through the threaded connection between the connecting pipe 1 and the second connector 4, the connecting pipe 1 can suspend the weight and bear the tensile load from the second oil pipe 300.

[0066] A second set screw 42 is provided on the periphery of the second connector 4. The axial direction of the second set screw 42 intersects the axial direction of the connecting pipe 1, and the second set screw 42 abuts against the periphery of the connecting pipe 1. By applying a radial clamping force to the connecting pipe 1 through the second set screw 42, the connection stability between the connecting pipe 1 and the second connector 4 can be improved, thereby enhancing the load-bearing capacity of the connecting pipe 1.

[0067] It should be noted that both the first joint 2 and the second joint 4 are provided with hollow channels 23 to facilitate the flow of fluid media such as fracturing fluid, air, and natural gas.

[0068] In some embodiments, such as Figure 5 As shown, a first sealing ring 223 is provided between the first connector 2 and the connecting pipe 1, and the first sealing ring 223 is disposed on the inner wall surface of the tapered hole 222. The first sealing ring 223 can enhance the sealing performance between the connecting pipe 1 and the first connector 2, and prevent the internal fluid medium from leaking from the gap between the connecting pipe 1 and the first connector 2. Of course, as Figure 1 As shown, a second sealing ring 43 may also be provided between the second connector 4 and the connecting pipe 1. The second sealing ring 43 is embedded in the inner wall of the channel 23 of the second connector 4. The second sealing ring 43 can enhance the sealing performance between the connecting pipe 1 and the second connector 4, and prevent the internal fluid medium from leaking from the gap between the connecting pipe 1 and the second connector 4.

[0069] According to the tubing connection device 100 provided in the embodiments of this application, the connection process of the tubing connection device 100 at the wellhead is as follows:

[0070] First, such as Figure 8 As shown, the first oil pipe 200 is connected to the first connector 2, and the second oil pipe 300 is connected to the second connector 4;

[0071] Next, insert the connecting pipe 1 into the tapered hole 222 of the first connector 2. If the first connecting tooth 21 of the first connector 2 cannot engage with the second connecting tooth 31 of the anti-torsion ring 3, the second connector 4 can be rotated with pipe wrenches until the first connecting tooth 21 and the second connecting tooth 31 are engaged. Figure 9 As shown;

[0072] Then, slide the nut 5 relative to the connecting pipe 1 towards the first connector 2, and rotate the nut 5 to connect the nut 5 and the first connector 2 via threads until the limiting ring 521 abuts against the limiting step 132, completing the connection. Figure 10 As shown.

[0073] The above connection process is simple to operate, enabling rapid and reliable connection of two sections of tubing at the wellhead, improving operational efficiency and reducing well control risks.

[0074] This application provides a continuous tubing, including a first tubing 200, a second tubing 300, and a tubing connection device 100 as described above. The continuous tubing provided in this application includes the aforementioned tubing connection device 100, and therefore naturally possesses the technical effects of the aforementioned tubing connection device 100, which will not be elaborated further here.

[0075] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0076] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0077] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A tubing interface device for connecting a first tubing and a second tubing, characterized in that, The oil pipe butt joint device comprises: a connecting pipe comprising a first end and a second end arranged oppositely in an axial direction of the connecting pipe; a first joint sleeved on the first end of the connecting pipe, the first joint being provided with a first connecting tooth, and the first joint being used for connecting the first oil pipe; a torsion-proof ring sleeved on a circumferential side of the connecting pipe, one end of the torsion-proof ring being provided with a second connecting tooth, and the other end of the torsion-proof ring being connected with the connecting pipe; a second joint sleeved on the second end of the connecting pipe, the second joint being used for connecting the second oil pipe; wherein the first connecting tooth and the second connecting tooth are engaged and connected to transmit torque under the action of a shearing force between the first connecting tooth and the second connecting tooth.

2. The tubing landing nipple of claim 1, wherein, The circumferential side of the connecting pipe is provided with a boss, the boss being provided with a groove at one end close to the torsion-proof ring, and the groove extending along the axial direction of the connecting pipe; the torsion-proof ring being arranged between the first joint and the boss, the other end of the torsion-proof ring being provided with a protrusion, and the protrusion being connected with the groove.

3. The tubing pigging apparatus of claim 2, wherein, The oil pipe butt joint device comprises a nut, the nut being sleeved on the connecting pipe, the nut comprising a connecting end and a limiting end arranged oppositely in an axial direction of the nut, and the connecting end of the nut being detachably connected with the first joint; the limiting end of the nut being slidably connected with the connecting pipe and being clampedly connected with the boss.

4. The tubing landing nipple of claim 3, wherein, The connecting end of the nut is provided with a first internal thread, one end of the first joint close to the torsion-proof ring is provided with a connecting seat, the nut is sleeved on the connecting seat, and the connecting seat is provided with a first external thread connected with the first internal thread.

5. The tubing pigging apparatus of claim 3, wherein, The limiting end of the nut is provided with a limiting ring, the limiting ring extending from an inner wall of the nut to the connecting pipe, and the boss is provided with a limiting step connected with the limiting ring.

6. The tubing landing nipple of claim 4, wherein, The first connecting tooth is arranged on the connecting seat, a circumferential side of the nut is provided with a first set screw, an axial direction of the first set screw intersects with an axial direction of the connecting pipe, and the first set screw is abuttingly connected with the circumferential side of the connecting seat.

7. The tubing pigging apparatus of claim 4, wherein, The first end of the connecting pipe is provided with a tapered surface, and the connecting seat is provided with a tapered hole connected with the tapered surface.

8. The tubing crossover of claim 1, wherein, The second joint is provided with a second internal thread, and the second end of the connecting pipe is provided with a second external thread connected with the second internal thread.

9. The tubing landing nipple of claim 1, wherein, A first sealing ring is arranged between the first joint and the connecting pipe; and / or a second sealing ring is arranged between the second joint and the connecting pipe.

10. A coiled tubing, characterized by The oil pipe butt joint device comprises a first oil pipe, a second oil pipe, and the oil pipe butt joint device according to any one of claims 1 to 9.

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