Butt joint device and oil extraction equipment

Abstract

The invention relates to a butt joint device and oil extraction equipment, the butt joint device comprises a sleeve, the side wall of the sleeve is provided with a communicating groove, and the communicating groove communicates with the interior of the sleeve; the locking piece is at least partially arranged in the communicating groove; a locking protruding block is arranged on the side wall of the locking shaft, the locking shaft can be arranged in the sleeve in a penetrating mode, and the locking protruding block can be connected with the locking piece in a clamped mode; wherein a first guide inclined plane and a second guide inclined plane are arranged on one surface, facing the locking shaft, of the locking piece, and a first guide inclined plane and a second guide inclined plane are arranged on one surface, facing the locking piece, of the locking convex block; the first guide inclined plane is used for guiding when the locking piece and the locking shaft are inserted, and the second guide inclined plane is used for guiding when the locking piece and the locking shaft are detached. The butt joint device can be inserted and pulled out in the underground environment, the whole equipment does not need to be lifted during maintenance, operation is easy and convenient, repeated use can be achieved, and therefore the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of oil equipment, in particular to a docking device and an oil production equipment. Background Art

[0002] Oil production equipment usually includes a docking structure for docking cables or pipelines on two components. Existing docking structures generally require manual docking at the wellhead or on the ground. After docking, the equipment as a whole is placed into the downhole environment at a specified depth. When the cable or pipeline needs to be replaced, the equipment as a whole is lifted to replace it. The operation is cumbersome, and the original docking structure will be damaged after replacement and cannot be used continuously, resulting in a relatively high maintenance cost. Summary of the Invention

[0003] Based on this, in view of the above problems, it is necessary to provide a docking device and an oil production equipment to simplify the docking operation and reduce the maintenance cost.

[0004] The present invention first provides a docking device, including: a sleeve, a communication groove is provided on the side wall of the sleeve, and the communication groove communicates with the inside of the sleeve; a locking member, at least part of the locking member is disposed in the communication groove; a locking shaft, a locking protrusion is provided on the side wall of the locking shaft, the locking shaft can be inserted into the sleeve, and the locking protrusion can be engaged with the locking member; wherein, a first guiding inclined surface and a second guiding inclined surface are provided on the surface of the locking member facing the locking shaft, and / or, a first guiding inclined surface and a second guiding inclined surface are provided on the surface of the locking protrusion facing the locking member; the first guiding inclined surface is used for guiding when the locking member is inserted into the locking shaft, and the second guiding inclined surface is used for guiding when the locking member is disassembled from the locking shaft.

[0005] The locking member and the locking protrusion are engaged with each other to reduce the possibility that the locking shaft can reversely escape from the sleeve when no external force is applied, thereby ensuring that the locking shaft and the locking protrusion are engaged with each other. The second guide bevel can play a guiding role. The second guide bevel pushes the locking member to move in the connecting groove toward the side away from the locking shaft, so that the locking member and the locking protrusion will not interfere with each other, and the locking shaft can be smoothly removed from the sleeve. In this way, the docking device can be plugged in and out in an underground environment. There is no need to lift the entire equipment during maintenance. The operation is simple and convenient. The docking device will not be damaged after being pulled out and can be reused, thereby reducing maintenance costs.

[0006] In one of the embodiments, the docking device is relatively provided with a first end and a second end along the axial direction; the first guide bevel of the locking member is provided on the side of the second guide bevel of the locking member facing the first end, and the first guide bevel of the locking protrusion is provided on the side of the second guide bevel of the locking protrusion facing away from the first end; when the locking member is plugged into the locking shaft, the first guide bevel of the locking protrusion can slide along the first guide bevel of the locking member; when the locking member is disassembled from the locking shaft, the second guide bevel of the locking protrusion can slide along the second guide bevel of the locking member.

[0007] With such arrangement, during the process of inserting or removing the locking shaft from the sleeve, the two inclined surfaces can slide together to improve the guiding effect of the first guiding inclined surface and the second guiding inclined surface on the locking member.

[0008] In one embodiment, the angle between the first guiding slope and the axis of the docking device is α, and the angle between the second guiding slope and the axis of the docking device is β, wherein sinα·cosα≥sinβ·cosβ.

[0009] With this arrangement, the user can insert the locking shaft into the sleeve by applying a smaller docking force, which facilitates the user's docking; a larger extraction force is required to pull the locking shaft out of the sleeve to prevent the locking shaft from accidentally falling out of the sleeve; and the user can also determine whether the locking shaft is inserted into or out of the sleeve based on the size of the applied docking force and extraction force.

[0010] In one of the embodiments, a first limiting surface is further provided on a side of the locking member facing the locking shaft, and the first limiting surface is arranged between the first guiding inclined surface of the locking member and the second guiding inclined surface of the locking member; a second limiting surface is further provided on a side of the locking protrusion facing the locking member, and the second limiting surface is arranged between the first guiding inclined surface of the locking protrusion and the second guiding inclined surface of the locking protrusion; the first limiting surface and the second limiting surface are used for limiting the locking protrusion when the locking protrusion is engaged with the locking member.

[0011] With such a configuration, during the process of inserting the locking shaft into or removing it from the sleeve, the sliding fit between the first limit surface and the second limit surface will increase the friction between the two, so that the user needs to apply a larger force to the locking shaft to insert or remove the locking shaft, thereby further reducing the possibility of the locking shaft slipping out of the sleeve in the opposite direction without being subjected to external force.

[0012] In one embodiment, the docking device further comprises an elastic member, wherein the elastic member abuts against a side of the locking member facing away from the locking shaft, and the elastic member can apply an elastic force to the locking member toward the locking shaft.

[0013] With such a configuration, after the locking shaft is inserted into place, the locking piece can move and reset in the connecting groove toward the side close to the locking shaft under the action of the elastic force of the elastic piece; and the user needs to apply a large force to the locking shaft to achieve the insertion and removal of the locking shaft, thereby further reducing the possibility of the locking shaft slipping out of the sleeve in the opposite direction without being subjected to external force.

[0014] In one embodiment, there are multiple locking members, and the multiple locking members are arranged at intervals along the circumference of the sleeve, and the elastic member is arranged outside the multiple locking members.

[0015] In this way, multiple locking members share the same elastic member, which can simplify the structure of the locking member; and the elastic member is arranged outside the multiple locking members and can also prevent the locking members from slipping out of the connecting groove.

[0016] In one of the embodiments, a guide member is provided between one of the sleeve and the locking shaft, and a slot is provided between the other of the sleeve and the locking shaft; when the locking member is plugged into the locking shaft, the guide member is inserted into the slot.

[0017] Such an arrangement can achieve circumferential positioning of the locking shaft, ensuring the certainty and uniqueness of the docking direction between the sleeve and the locking shaft.

[0018] In one of the embodiments, the guide member is disposed on an outer wall of the locking shaft, and the width of the guide member decreases sequentially along the plugging direction of the locking member and the locking shaft.

[0019] With such a setting, it is convenient to align the guiding member with the slot, thereby facilitating the user to dock the sleeve and the locking shaft.

[0020] In one embodiment, a first abutting member is provided on the inner wall of the sleeve, and a second abutting member is provided on the outer wall of the locking shaft; when the locking member is inserted into the locking shaft, the first abutting member abuts against the second abutting member.

[0021] With such a setting, axial limitation of the locking shaft can be achieved, preventing the locking shaft from being further inserted into the sleeve due to excessive docking force applied by the user, which may damage the docking terminals. At the same time, it can also prompt the user that the locking shaft is inserted in place.

[0022] The present invention also provides an oil production device, including the docking device as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Structural schematic diagram of a docking device according to an embodiment of the present invention;

[0025] Figure 2 Provided by the present invention Figure 1 Assembly cross-section Figure 1 ;

[0026] Figure 3 Provided by the present invention Figure 2 Enlarged schematic diagram at A in

[0027] Figure 4 Provided by the present invention Figure 1 Assembly cross-section Figure 2 ;

[0028] Figure 5 Provided by the present invention Figure 4 Enlarged schematic diagram at B in

[0029] Figure 6 Provided by the present invention Figure 1 Assembly cross-section Figure 3 ;

[0030] Figure 7 Provided by the present invention Figure 6 Enlarged schematic diagram at C in

[0031] Figure 8 Provided by the present inventionFigure 1 Schematic perspective view of the locking shaft;

[0032] Figure 9 Provided by the present invention Figure 8 Partial cross-sectional view of the locking shaft;

[0033] Figure 10 Provided by the present invention Figure 1 Schematic perspective view of the sleeve in;

[0034] Figure 11 Provided by the present invention Figure 1 Schematic view of the locking member in;

[0035] Figure 12 Provided by the present invention Figure 1 Schematic perspective view of the docking member in.

[0036] Reference numerals: 11, sleeve; 112, communication groove; 113, slot; 114, avoidance groove; 12, locking member; 121, first inclined surface; 122, third inclined surface; 123, card slot; 124, first limiting surface; 13, docking member; 131, first mounting position; 14, first abutting member; 15, elastic member; 21, locking shaft; 212, second mounting position; 22, locking convex block; 221, second inclined surface; 222, fourth inclined surface; 223, second limiting surface; 23, guiding member; 231, guiding surface; 24, second abutting member; 3, first terminal; 4, second terminal. Detailed Description of the Invention

[0037] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following detailed description of the specific embodiments of the present application will be made with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0038] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used in the description of the present application are for illustrative purposes only and do not represent the only implementation manner.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0040] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0041] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application pertains. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0042] Oil production equipment generally includes a docking structure for docking cables or pipelines on two components. Existing docking structures generally require manual docking at the wellhead or on the ground, for example, using crimping docking and insulating with insulating tape; after docking, the docking structure and the equipment as a whole are placed in the downhole environment at a specified depth, such as 3000 meters underground. When the cable or pipeline needs to be replaced, the docking structure and the equipment as a whole are lifted for replacement. The operation is cumbersome, and the original docking structure will be damaged after replacement and cannot be used continuously, resulting in a relatively high maintenance cost.

[0043] To solve the above problems, as Figures 1 to 12 shown, the present invention first provides a docking device to simplify the docking operation and reduce costs.

[0044] As Figures 1 to 2As shown in the figure, specifically, the docking device includes a sleeve 11, a locking member 12 and a locking shaft 21. A communication groove 112 is provided on the side wall of the sleeve 11, and the communication groove 112 communicates with the inside of the sleeve 11; at least part of the locking member 12 is disposed in the communication groove 112; a locking projection 22 is provided on the side wall of the locking shaft 21, and the locking shaft 21 can pass through the sleeve 11, and the locking projection 22 can be engaged with the locking member 12; wherein, a first guiding inclined surface and a second guiding inclined surface are provided on the surface of the locking member 12 facing the locking shaft 21, and / or, a first guiding inclined surface and a second guiding inclined surface are provided on the surface of the locking projection 22 facing the locking member 12; the first guiding inclined surface is used for guiding when the locking member 12 and the locking shaft 21 are inserted, and the second guiding inclined surface is used for guiding when the locking member 12 and the locking shaft 21 are disassembled.

[0045] In the docking device provided by the embodiment of the present invention, during the installation process, the locking shaft 21 is inserted into the sleeve 11, and the locking member 12 and the locking projection 22 are abutted against each other through the first guiding inclined surface. At this time, the first guiding inclined surface can play a guiding role, and the first guiding inclined surface pushes the locking member 12 to move away from the locking shaft 21 in the communication groove 112, so that the locking member 12 and the locking projection 22 do not interfere with each other, and the locking shaft 21 can continue to be inserted into the sleeve 11. When the locking shaft 21 is inserted in place, the locking member 12 can move back toward the side close to the locking shaft 21 in the communication groove 112, so that the locking member 12 and the locking projection 22 are engaged with each other, thereby reducing the possibility that the locking shaft 21 reversely disengages from the sleeve 11 without external force, ensuring the stability and reliability of the docking between the locking shaft 21 and the sleeve 11, and simplifying the docking operation.

[0046] When it is necessary to disassemble the docking device, the locking shaft 21 is pulled out of the sleeve 11, and the locking member 12 and the locking projection 22 are abutted against each other through the second guiding inclined surface. At this time, the second guiding inclined surface can play a guiding role, and the second guiding inclined surface pushes the locking member 12 to move away from the locking shaft 21 in the communication groove 112, so that the locking member 12 and the locking projection 22 do not interfere with each other, and the locking shaft 21 can be smoothly disengaged from the sleeve 11. When the locking shaft 21 is disengaged from the sleeve 11, the locking member 12 can move back toward the side close to the locking shaft 21 in the communication groove 112. In this way, the docking device can be inserted and pulled out in the underground environment, and the whole device does not need to be lifted during maintenance, the operation is simple and convenient, and the docking device will not be damaged after being pulled out and can be reused, thereby reducing the maintenance cost.

[0047] As Figures 2 to 3As shown, in the illustrated embodiment, the docking device is relatively provided with a first end a and a second end b along the axial direction; the first guide slope of the locking member 12 is provided on the side of the second guide slope of the locking member 12 facing the first end a, and the first guide slope of the locking protrusion 22 is provided on the side of the second guide slope of the locking protrusion 22 away from the first end a; when the locking member 12 is plugged into the locking shaft 21, the first guide slope of the locking protrusion 22 can slide along the first guide slope of the locking member 12; when the locking member 12 is disassembled from the locking shaft 21, the second guide slope of the locking protrusion 22 can slide along the second guide slope of the locking member 12. Specifically, the first guide slope of the locking member 12 is the first slope 121, the second guide slope of the locking member 12 is the third slope 122, the first guide slope of the locking protrusion 22 is the second slope 221, and the second guide slope of the locking protrusion 22 is the fourth slope 222. During the insertion of the locking shaft 21 into the sleeve 11, the first inclined surface 121 and the second inclined surface 221 slide together to improve the guiding effect of the first guiding inclined surface on the locking member 12. During the withdrawal of the locking shaft 21 from the sleeve 11, the third inclined surface 122 and the fourth inclined surface 222 slide together to improve the guiding effect of the second guiding inclined surface on the locking member 12.

[0048] Of course, in other embodiments, only the locking member 12 may have the first inclined surface 121 , or only the locking protrusion 22 may have the second inclined surface 221 ; similarly, only the locking member 12 may have the third inclined surface 122 , or only the locking protrusion 22 may have the fourth inclined surface 222 .

[0049] like Figure 3 , Figure 5 and Figure 7 As shown, the locking member 12 is further provided with a first limiting surface 124 on one side facing the locking shaft 21, and the first limiting surface 124 is arranged between the first guiding inclined surface of the locking member 12 and the second guiding inclined surface of the locking member 12; the locking protrusion 22 is further provided with a second limiting surface 223 on one side facing the locking member 12, and the second limiting surface 223 is arranged between the first guiding inclined surface of the locking protrusion 22 and the second guiding inclined surface of the locking protrusion 22; the first limiting surface 124 and the second limiting surface 223 are used for limiting the locking protrusion 22 when it is engaged with the locking member 12. The first limiting surface 124 and the second limiting surface 223 can limit the radial movement of the locking shaft 21 in the sleeve 11. Moreover, during the process of inserting or removing the locking shaft 21 from the sleeve 11, the sliding fit between the first limit surface 124 and the second limit surface 223 will increase the friction between the two, so that the user needs to apply a larger force to the locking shaft 21 to insert and remove the locking shaft 21, thereby further reducing the possibility of the locking shaft 21 slipping out of the sleeve 11 in the opposite direction without being subjected to external force, thereby ensuring the stability and reliability of the docking between the locking shaft 21 and the sleeve 11.

[0050] likeFigure 6 , Figure 8 and Figure 12 As shown in Figure 6 , Figure 8 and Figure 12 , in one embodiment, the docking device can be used to dock the cables or pipes on two components. The docking device further includes a docking member 13 connected to one end of the sleeve 11 facing the second end b. The docking member 13 is provided with a first mounting position 131, and the locking shaft 21 is provided with a second mounting position 212. The first mounting position 131 is used to mount the first terminal 3 of the cable of one component or the first docking end of the pipe, and the second mounting position 212 is used to mount the second terminal 4 of the cable of the other component or the second docking end of the pipe. When the locking shaft 21 is inserted in place, the first terminal 3 can be docked with the second terminal 4, or the first docking end can be docked with the second docking end. And when the docking device is used to dock the cables on two components, insulating oil can be filled in the sleeve 11 so that the first terminal 3 is immersed in the insulating oil. When the locking shaft 21 is inserted into the sleeve 11, the second terminal 4 is inserted into the insulating oil to achieve the insulation between the first terminal 3 and the second terminal 4 and other external structures. Wherein, the number of the first mounting positions 131 can be one or more, and the number of the second mounting positions 212 is the same as that of the first mounting positions 131 and is arranged in one-to-one correspondence, so that a plurality of first terminals 3 can be docked with a plurality of second terminals 4 at the same time, or a plurality of first docking ends can be docked with a plurality of second docking ends at the same time.

[0051] Of course, in other embodiments, the docking device can also be used to connect two components. The sleeve 11 is connected to one component, and the locking shaft 21 is connected to the other component. When the locking shaft 21 is inserted into the sleeve 11, the two components are connected to each other.

[0052] Such as Figure 9 and Figure 11As shown, the angle between the first guiding inclined plane and the axis of the docking device is α, and the angle between the second guiding inclined plane and the axis of the docking device is β, where sinα·cosα ≥ sinβ·cosβ. It is defined that during the process of inserting the locking shaft 21 into the sleeve 11, the docking force applied by the user to the locking shaft 21 or the sleeve 11 along the axial direction of the docking device is F1. When the locking member 12 or the locking protrusion 22 moves along the radial direction of the docking device, the force required along the radial direction of the docking device is F, and F = F1·sinα·cosα. That is to say, the magnitude of the docking force F1 that the user needs to apply during the process of inserting the locking shaft 21 into the sleeve 11 can be controlled by adjusting the magnitude of the angle α. And the larger the value of sinα·cosα, the smaller the docking force F1. Thus, the user can insert the locking shaft 21 into the sleeve 11 by applying a relatively small docking force F1, which is convenient for the user to dock. Among them, since the force F required along the radial direction of the docking device is constant when the locking member 12 or the locking protrusion 22 moves along the radial direction of the docking device, when 0° < α ≤ 45°, the larger the angle α, the larger the value of sinα·cosα, and the smaller the required docking force F1; when 45° ≤ α < 90°, the larger the angle α, the smaller the value of sinα·cosα, and the larger the required docking force F1. And the user can also judge whether the locking shaft 21 is inserted in place according to the magnitude of the applied docking force F1.

[0053] Similarly, it is defined that during the process of pulling out the locking shaft 21 from the sleeve 11, the pulling force applied by the user to the locking shaft 21 or the sleeve 11 along the axial direction of the docking device is F2. When the locking member 12 or the locking protrusion 22 moves along the radial direction of the docking device, the force required along the radial direction of the docking device is F, and F = F2·sinβ·cosβ. That is to say, the magnitude of the pulling force F2 that the user needs to apply during the process of pulling out the locking shaft 21 from the sleeve 11 can be controlled by adjusting the magnitude of the angle β. And the smaller the value of sinβ·cosβ, the larger the pulling force F2. Thus, the user needs to apply a relatively large pulling force F2 to pull out the locking shaft 21 from the sleeve 11 to prevent the locking shaft 21 from accidentally coming out of the sleeve 11. Among them, since the force F required along the radial direction of the docking device is constant when the locking member 12 or the locking protrusion 22 moves along the radial direction of the docking device, when 0° < β ≤ 45°, the larger the angle β, the larger the value of sinβ·cosβ, and the smaller the required pulling force F2; when 45° ≤ β < 90°, the larger the angle β, the smaller the value of sinβ·cosβ, and the larger the required pulling force F2. And the user can also judge whether the locking shaft 21 has come out of the sleeve 11 according to the magnitude of the applied pulling force F2.

[0054] Such as Figure 3 、 Figure 5 and Figure 7As shown, in one embodiment, the docking device further includes an elastic member 15. The elastic member 15 abuts against a surface of the locking member 12 facing away from the locking shaft 21, and the elastic member 15 can apply an elastic force towards the locking shaft 21 to the locking member 12. During the process of inserting the locking shaft 21 into the sleeve 11, the first inclined surface 121 of the locking member 12 abuts against the second inclined surface 221 of the locking projection 22. When the force F along the radial direction of the docking device applied by the locking projection 22 to the locking member 12 is greater than the elastic force of the elastic member 15, the locking member 12 can slide towards the side away from the locking shaft 21 within the communication groove 112, and the elastic member 15 deforms; after the locking shaft 21 is inserted in place, the locking member 12 can slide towards the side close to the locking shaft 21 under the action of the elastic force of the elastic member 15, so that the locking member 12 and the locking projection 22 are engaged with each other to restrict the locking shaft 21 from reversely disengaging from the sleeve 11 without external force. After the locking shaft 21 is inserted in place, the locking member 12 can move and reset towards the side close to the locking shaft 21 within the communication groove 112 under the action of the elastic force of the elastic member 15. And the user needs to apply a relatively large force to the locking shaft 21 to be able to insert and remove the locking shaft 21, thereby further reducing the possibility of the locking shaft 21 reversely disengaging from the sleeve 11 without external force and improving the stability and reliability of the docking between the locking shaft 21 and the sleeve 11.

[0055] As Figure 2 , Figures 4 to 6 shown, the number of the locking members 12 is multiple, and the multiple locking members 12 are arranged at intervals along the circumferential direction of the sleeve 11, and the elastic member 15 is disposed around the multiple locking members 12. Among them, the number of the locking members 12 can be two, three, four or more. The locking projection 22 can be an annular projection, or the number of the locking projections 22 is also multiple and is arranged in one-to-one correspondence with the locking members 12. In this way, the engagement and cooperation of the multiple locking members 12 with the locking projection 22 can improve the stability and reliability of the locking shaft 21 within the sleeve 11 and prevent the locking shaft 21 from accidentally disengaging from the sleeve 11 due to the failure of the engagement of one locking member 12 with the locking projection 22. The multiple locking members 12 share the same elastic member 15, which can simplify the structure of the locking members 12, and the elastic member 15 disposed around the multiple locking members 12 can also play a role in limiting the locking members 12 to prevent the locking members 12 from disengaging from the communication groove 112 outward. Specifically, the elastic member 15 can be an elastic steel ring, and the elastic steel ring is sleeved on the outer periphery of the sleeve 11 and abuts against the outer walls of the respective locking members 12. When the locking member 12 slides towards the side away from the locking shaft 21 within the communication groove 112, the elastic steel ring expands outward and has a tendency to contract inward. After the locking shaft 21 is inserted in place, the elastic steel ring can contract inward under the action of its own elastic force and drive the locking member 12 to slide towards the side close to the locking shaft 21.

[0056] As Figure 3 and Figure 10As shown, on the outer side wall of each locking member 12, a clamping groove 123 extending along the circumferential direction of the sleeve 11 is provided at a corresponding position, and on the outer peripheral wall of the sleeve 11, an avoidance groove 114 extending along the circumferential direction of the sleeve 11 and corresponding to the clamping groove 123 is provided. The elastic steel ring is embedded in each corresponding clamping groove 123 and avoidance groove 114 to prevent the elastic steel ring from sliding along the axial direction of the sleeve 11 and disengaging from the locking member 12. Moreover, the number of elastic steel rings can be one, two, three or more, and multiple elastic steel rings are arranged at intervals along the axial direction of the sleeve 11.

[0057] Of course, in other embodiments, the elastic member 15 can also be other elastic structures such as a spring, a spring piece or an elastic arm, and the number of the elastic members 15 corresponds to the number of the locking members 12 one by one. When the two ends of the elastic member 15 are respectively connected to the outer wall of the locking member 12 and the outer wall of the sleeve 11, when the locking member 12 slides towards the side away from the locking shaft 21 in the communication groove 112, the elastic member 15 deforms and applies an elastic force towards the locking shaft 21 to the locking member 12.

[0058] As Figure 2 , Figure 8 and Figure 10 As shown, a guiding member 23 is provided on one of the sleeve 11 and the locking shaft 21, and a slot 113 is provided on the other of the sleeve 11 and the locking shaft 21; when the locking member 12 is inserted into the locking shaft 21, the guiding member 23 is inserted into the slot 113. The cooperation between the guiding member 23 and the slot 113 can achieve the circumferential positioning of the locking shaft 21, so that the locking shaft 21 can be further inserted into the sleeve 11 only when the guiding member 23 and the slot 113 are aligned, and the locking shaft 21 cannot rotate relative to the sleeve 11 after being inserted in place, thereby ensuring the certainty and uniqueness of the docking direction between the sleeve 11 and the locking shaft 21, and ensuring that the first terminal 3 or the first docking end on the first installation position 131 can accurately dock with the second terminal 4 or the second docking end on the second installation position 212.

[0059] As Figure 8As shown, in one embodiment, the guiding member 23 is disposed on the outer wall of the locking shaft 21, and along the insertion direction of the locking member 12 into the locking shaft 21, the width of the guiding member 23 decreases successively. That is, the width of the guiding member 23 gradually decreases from the first end a towards the second end b. Herein, the width of the guiding member 23 refers to the dimension of the guiding member 23 along the circumferential direction of the locking shaft 21, and guiding surfaces 231 are provided on both sides of the guiding member 23. Thus, during the process of inserting the locking shaft 21 into the sleeve 11, even if the guiding member 23 is not completely aligned with the slot 113, the guiding surfaces 231 can cooperate with the inner wall of the slot 113 to enable the locking shaft 21 to rotate relative to the sleeve 11 until the guiding member 23 is aligned with the slot 113, thereby further facilitating the user to dock the sleeve 11 and the locking shaft 21. Of course, in other embodiments, the guiding member 23 can also be disposed on the inner wall of the sleeve 11 and extend along the axial direction of the sleeve 11, and the width of the guiding member 23 gradually decreases from the second end b towards the first end a.

[0060] As Figure 2 , Figure 8 and Figure 10 shown, a first abutting member 14 is provided on the inner wall of the sleeve 11, and a second abutting member 24 is provided on the outer wall of the locking shaft 21; when the locking member 12 is inserted into the locking shaft 21, the first abutting member 14 abuts against the second abutting member 24. When the locking shaft 21 is inserted in place, the first abutting member 14 can abut against the second abutting member 24 to achieve axial limit of the locking shaft 21, prevent the docking force applied by the user from being too large, causing the locking shaft 21 to be further inserted into the sleeve 11 and resulting in damage to the first terminal 3 or the first docking end on the first mounting position 131 and the second terminal 4 or the second docking end on the second mounting position 212, and at the same time can also prompt the user that the locking shaft 21 is inserted in place.

[0061] As Figure 8 and Figure 10 shown, in one embodiment, the first abutting member 14 is a stepped portion, and the second abutting member 24 is an annular protrusion. The abutting of the annular protrusion against the stepped portion can increase the contact area between the first abutting member 14 and the second abutting member 24, ensure the axial limit effect on the locking shaft 21, and at the same time the stepped portion will not interfere with other structures on the locking shaft 21, avoiding affecting the normal insertion of the locking shaft 21. Of course, in other embodiments, the first abutting member 14 and the second abutting member 24 can also be set as protruding structures that can abut against each other, or set as a structure of a protrusion cooperating with a groove, etc., as long as the axial direction of the locking shaft 21 can be limited when the locking shaft 21 is inserted in place, and the embodiments of the present invention do not make specific limitations herein.

[0062] An embodiment of the present invention further provides an oil production device, including the above docking device. This docking device can enable the plugging and unplugging of two components of the oil production device in the downhole environment. During maintenance, it is not necessary to lift the entire device, the operation is simple and convenient, and it can be reused, reducing the maintenance cost. Of course, this docking device can also be used for the docking of structures such as cables and pipelines in other devices, and the embodiments of the present invention do not make specific limitations here.

[0063] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0064] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A docking device, characterized in that, include: A sleeve, wherein a side wall of the sleeve is provided with a communication groove, and the communication groove is communicated with the interior of the sleeve; A locking member, wherein the locking member is at least partially disposed in the communicating groove; A locking shaft, a side wall of which is provided with a locking protrusion, the locking shaft can be inserted into the sleeve, and the locking protrusion can be engaged with the locking member; Wherein, the locking member has a first guide slope and a second guide slope on one side facing the locking shaft, and / or the locking protrusion has a first guide slope and a second guide slope on one side facing the locking member; The first guiding inclined surface is used for guiding when the locking member and the locking shaft are plugged in, and the second guiding inclined surface is used for guiding when the locking member and the locking shaft are disassembled.

2. The docking device according to claim 1, characterized in that, The docking device is provided with a first end and a second end opposite to each other along the axial direction; The first guide slope of the locking member is arranged on a side of the second guide slope of the locking member facing the first end, and the first guide slope of the locking protrusion is arranged on a side of the second guide slope of the locking protrusion facing away from the first end; When the locking member is plugged into the locking shaft, the first guide slope of the locking protrusion can slide along the first guide slope of the locking member; When the locking member and the locking shaft are disassembled, the second guiding inclined surface of the locking protrusion can slide along the second guiding inclined surface of the locking member.

3. The docking device according to claim 1, characterized in that, The angle between the first guiding inclined surface and the axis of the docking device is α, and the angle between the second guiding inclined surface and the axis of the docking device is β, wherein sinα·cosα≥sinβ·cosβ.

4. The docking device according to claim 1, wherein, The locking member is further provided with a first limiting surface on one side facing the locking shaft, and the first limiting surface is arranged between the first guiding inclined surface of the locking member and the second guiding inclined surface of the locking member; A second limiting surface is also provided on a side of the locking protrusion facing the locking member, and the second limiting surface is provided between the first guiding inclined surface of the locking protrusion and the second guiding inclined surface of the locking protrusion; The first limiting surface and the second limiting surface are used for limiting the position when the locking protrusion is engaged with the locking member.

5. The docking device according to claim 1 or claim 2 or claim 4, characterized in that, The docking device further comprises an elastic member, wherein the elastic member abuts against a side of the locking member facing away from the locking shaft, and the elastic member can apply an elastic force toward the locking shaft to the locking member.

6. The docking device according to claim 5, characterized in that There are multiple locking members, which are spaced apart along the circumference of the sleeve, and the elastic member is arranged outside the multiple locking members.

7. The docking device according to claim 1, wherein A guide is provided between one of the sleeve and the locking shaft, and a slot is provided between the other of the sleeve and the locking shaft; When the locking member is plugged into the locking shaft, the guide member is plugged into the slot.

8. The docking device according to claim 7, characterized in that, The guide member is arranged on the outer wall of the locking shaft, and the width of the guide member decreases successively along the plugging direction of the locking member and the locking shaft.

9. The docking device according to claim 1, characterized in that, The inner wall of the sleeve is provided with a first abutment member, and the outer wall of the locking shaft is provided with a second abutment member; When the locking member is plugged into the locking shaft, the first abutting member abuts against the second abutting member.

10. An oil production device, characterized in that, Comprising a docking device as described in any one of claims 1 to 9.

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