Fishing socket
By designing a clamp that can be extended and contracted under the action of the abutment part, the problem that existing salvage barrels are difficult to clamp larger drop objects is solved, and effective clamping and salvage of larger objects is achieved.
Patent Information
- Application Number
- CN202422253042.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing salvage barrel begins to clamp when the jaws extend out of the outer barrel, making it difficult to clamp larger drop objects, and the jaws cannot effectively grasp the drop objects, affecting the salvage work.
A salvage barrel including a connecting head, an outer cylinder, a support member and a clamp is designed. The clamp member can selectively extend out of the outer cylinder, including a first portion and a second portion, and the second portion is arranged in an inclined manner, and the clamp member is retracted by the abutment action of the abutment portion to clamp the falling object.
Effective clamping and salvage of larger types of dropped objects is achieved, avoiding the defect of falling objects being pushed deeper, and improving salvage efficiency and success rate.
Smart Images
Figure CN223034958U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present utility model relate to the technical field of fishing equipment, and particularly to a fishing barrel. Background Art
[0002] A fishing barrel is a commonly used tool for oil and gas well operations. Its main function is to fish various objects that fall into the well during the drilling or workover of oil and gas wells, such as drill strings, tools, instruments, etc. The working principle of the fishing barrel is to connect with the object that has fallen into the well, and then use a drill pipe or other lifting equipment to lift the object out of the well.
[0003] In the existing fishing barrel, the clamping jaws usually start to clamp when they extend out of the outer barrel, which is not conducive to clamping larger types of dropped objects; the clamping jaws start to contract before they catch the dropped object, so the clamping jaws cannot catch the dropped object and push the dropped object deeper into the well, which greatly affects the fishing work. Summary of the Utility Model
[0004] In view of the deficiencies in the prior art, the present utility model provides a fishing barrel, which can facilitate the clamping jaws to clamp larger types of dropped objects.
[0005] In order to achieve the above object, the present utility model adopts the following technical solutions:
[0006] A fishing barrel includes a connection head, an outer barrel, a support member, and a clamping member. The outer barrel is connected to the connection head; the support member can move along the length direction of the outer barrel; the clamping member is rotatably connected to the support member, and the clamping member can selectively extend out of the outer barrel; wherein, the clamping member includes a first part and a second part, the first part is connected to one end of the second part away from the support member, and an abutting part is provided on one side of the outer barrel facing the clamping member; along the length direction of the outer barrel, the first part does not abut against the abutting part, and the second part abuts against the abutting part.
[0007] As one of the implementation manners, the clamping member includes a third part, the third part is connected to one end of the second part away from the first part, and the third part is rotatably connected to the support member.
[0008] As one of the implementation manners, a plurality of clamping protrusions are provided on one side of the clamping member facing away from the abutting part.
[0009] As one of the implementation manners, the support member and the outer barrel are rotatably arranged, and when the support member and the outer barrel rotate relative to each other, the second part is separated from the abutting part.
[0010] As one of the implementation manners, the fishing barrel includes an elastic member, and the elastic member is elastically connected between the clamping member and the supporting member respectively to push the clamping member to rotate in a direction away from the supporting member.
[0011] As one of the implementation manners, one end of the elastic member is fixedly connected to the supporting member, and the other end is slidably connected or fixedly connected to the clamping member.
[0012] As one of the implementation manners, one end of the elastic member is inserted into the supporting member, and the other end is slidably connected or fixedly connected to the clamping member.
[0013] As one of the implementation manners, the number of the abutting portions is multiple, and the multiple abutting portions are arranged at intervals along the circumferential direction of the outer cylinder. An accommodation cavity is formed between two adjacent abutting portions, and the number of the clamping members is the same as that of the abutting portions; along the circumferential direction of the outer cylinder, the length of the clamping member is less than that of the abutting portion, and the length of the clamping member is less than that of the accommodation cavity.
[0014] As one of the implementation manners, the fishing barrel includes an inner cylinder, the inner cylinder is rotatably connected to the connecting head, the supporting member is slidably connected to the inner cylinder, and the outer cylinder and the inner cylinder are rotatably arranged.
[0015] As one of the implementation manners, the inner cylinder is hermetically connected to the supporting member, a hydraulic cavity is formed by enclosing the inner cylinder and the supporting member, a communication hole is formed in the connecting head, the hydraulic cavity is connected to the communication hole, and the communication hole is used for connecting a pressure injection device.
[0016] The beneficial effects of the present utility model are as follows: The embodiment of the present application provides a fishing barrel, which includes a connection head, an outer barrel, a support member, and a clamping member. The outer barrel is connected to the connection head; the support member can move along the length direction of the outer barrel; the clamping member is rotatably connected to the support member, and the clamping member can selectively extend out of the outer barrel; wherein, the clamping member includes a first part and a second part. The first part is connected to one end of the second part away from the support member, and an abutting part is provided on one side of the outer barrel facing the clamping member; along the length direction of the outer barrel, the first part does not abut against the abutting part, and the second part abuts against the abutting part. Compared with the prior art, the clamping member of the present application is provided with a first part and a second part. The extending direction of the first part is parallel to the length direction of the outer barrel, and the first part does not abut against the abutting part. The extending direction of the second part forms an angle with the length direction of the outer barrel and abuts against the abutting part; when the first part extends out of the outer barrel, the distance between the first parts of multiple clamping members remains unchanged, maintaining the largest clamping space, which is conducive to the falling object entering the clamping space; due to the inclined setting of the second part, under the abutting action of the abutting part, the second part rotates towards the direction close to the support member, then multiple clamping members are in a contracted state, the clamping space shrinks, and the clamping member clamps the falling object. Finally, the outer barrel is pulled out of the oil well by an external device to achieve the function of fishing for the dropped fish. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 Shows a cross-sectional schematic diagram of a fishing barrel according to an embodiment of the present utility model;
[0018] Figure 2 Shows a partial cross-sectional schematic diagram of a fishing barrel according to an embodiment of the present utility model;
[0019] Figure 3 Shows a cross-sectional schematic diagram of an outer barrel according to an embodiment of the present utility model;
[0020] Figure 4 is Figure 1 the enlarged view at A in
[0021] Figure 5 Shows a connection schematic diagram of an elastic member according to an embodiment of the present utility model;
[0022] Reference numerals: 1, connection head; 2, outer barrel; 3, support member; 4, clamping member; 5, inner barrel; 6, elastic member; 11, communication hole; 21, abutting part; 22, accommodation cavity; 31, slot; 41, first part; 42, second part; 43, third part; 44, clamping protrusion; 51, hydraulic cavity. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] In the present utility model, the terms "arranged", "provided with", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, components, or constituent parts. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0024] The orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.
[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0026] Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present utility model can be understood according to specific circumstances.
[0027] In order to make the objectives, technical solutions, and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0028] Refer to Figure 1 and Figure 2, an embodiment of the present application provides a fishing barrel, which includes a connector 1, an outer barrel 2, a support member 3, and a clamping member 4. The outer barrel 2 is connected to the connector 1; the support member 3 can move along the length direction of the outer barrel 2; the clamping member 4 is rotatably connected to the support member 3, and the clamping member 4 can selectively extend out of the outer barrel 2; wherein, the clamping member 4 includes a first part 41 and a second part 42, the first part 41 is connected to one end of the second part 42 away from the support member 3, and an abutting part 21 is provided on one side of the outer barrel 2 facing the clamping member 4; along the length direction of the outer barrel 2, the first part 41 does not abut against the abutting part 21, and the second part 42 abuts against the abutting part 21.
[0029] In practical applications, one end of the connector 1 is connected to an external device, and the other end is connected to the outer barrel 2. The support member 3 is slidably arranged inside the outer barrel 2, and the clamping member 4 is arranged on the support member 3. When in use, the outer barrel 2 is lowered to a preset position in the oil well until the outer barrel 2 approaches the dropped object, and then the support member 3 is pushed to slide in the direction close to the dropped object. The support member 3 drives the clamping member 4 to extend out of the outer barrel 2, and the clamping member 4 clamps the dropped object. Then, the outer barrel 2 is lifted to pull the outer barrel 2 back to the ground. Since the clamping member 4 has clamped the dropped object, the dropped object is pulled out of the oil well together with the outer barrel 2, realizing the function of fishing for the dropped fish.
[0030] It should be noted that the number of the clamping members 4 is multiple, and a clamping space is formed between the multiple clamping members 4. When the dropped object is located in the clamping space, the clamping members 4 can clamp the dropped object.
[0031] In order to better clamp the dropped object, the clamping member 4 includes a first part 41 and a second part 42. The second part 42 can be connected to the support member 3, and the first part 41 is connected to one end of the second part 42 away from the support member 3. An abutting part 21 is provided on the outer barrel 2. Along the length direction of the outer barrel 2, the second part 42 is inclined. Specifically, the extending direction of the second part 42 forms an angle with the length direction of the outer barrel 2, and the extending direction of the first part 41 is parallel to the length direction of the outer barrel 2, and the first part 41 does not abut against the abutting part 21; therefore, when the support member 3 moves to drive the clamping member 4 to extend out of the outer barrel 2, when the first part 41 extends out of the outer barrel 2, the distance between the first parts 41 of the multiple clamping members 4 remains unchanged, that is, during the process of the first part 41 extending out of the outer barrel 2, the size of the clamping space formed by the multiple clamping members 4 remains unchanged. At this time, the clamping space is in the maximum range, which is beneficial for the dropped object to enter the clamping space; when the support member 3 moves until the second part 42 abuts against the abutting part 21, due to the inclined arrangement of the second part 42, under the abutting action of the abutting part 21, the second part 42 rotates towards the direction close to the support member 3, that is, towards the direction close to other clamping members 4, then the multiple clamping members 4 are in a contracted state, the clamping space shrinks until the clamping member 4 clamps the dropped object, and finally the outer barrel 2 is pulled out of the oil well by an external device, realizing the function of fishing for the dropped fish.
[0032] Compared with the prior art, the clamping member 4 of the present application is provided with a first portion 41 and a second portion 42. The extending direction of the first portion 41 is parallel to the length direction of the outer cylinder 2, and the first portion 41 does not abut against the abutting portion 21. The extending direction of the second portion 42 forms an angle with the length direction of the outer cylinder 2 and abuts against the abutting portion 21. When the first portion 41 extends out of the outer cylinder 2, the distance between the first portions 41 of the plurality of clamping members 4 remains unchanged, maintaining the largest clamping space, which is beneficial for the falling object to enter the clamping space. Since the second portion 42 is inclined, under the abutting action of the abutting portion 21, the second portion 42 rotates towards the direction close to the support member 3, and then the plurality of clamping members 4 are in a contracted state, the clamping space shrinks, and the clamping member 4 clamps the falling object. Finally, the outer cylinder 2 is pulled out of the oil well by an external device to realize the function of fishing for the fish downhole.
[0033] It should be noted that the fish downhole mentioned above refers to objects that have fallen into the well for various reasons, such as drill pipes, drill collars, drill bits, tubing, sucker rods, and downhole tools. During operations such as drilling, workover, and completion, these objects become detached from the original pipe string or equipment due to improper operation, equipment failure, etc. and remain in the well.
[0034] Refer to again Figure 2 , the clamping member 4 includes a third portion 43. The third portion 43 is connected to one end of the second portion 42 away from the first portion 41, and the third portion 43 is rotatably connected to the support member 3.
[0035] In practical applications, the first portion 41, the second portion 42, and the third portion 43 are connected in sequence. The first portion 41 mainly functions to expand the clamping space. The second portion 42 mainly abuts against the abutting portion 21 to drive the clamping member 4 to contract, so that the clamping member 4 clamps the falling object. The third portion 43 functions as a transitional connection. Since the second portion 42 is inclined, if the second portion 42 is directly connected to the support member 3, the range of rotation of the second portion 42 is small, and the second portion 42 is likely to collide with the support member 3 when rotating. Therefore, the present application provides the third portion 43. The third portion 43 is respectively connected to the second portion 42 and the support member 3. The third portion 43 can be arranged parallel to the first portion 41, so that the range of rotation of the third portion 43 around the support member 3 is larger, which is beneficial to providing the clamping ability of the clamping member 4.
[0036] Refer to again Figure 2, a plurality of clamping protrusions 44 are provided on the side of the clamping member 4 away from the abutment portion 21. The plurality of clamping protrusions 44 are arranged at intervals along the length direction of the clamping member 4, and are also arranged at intervals along the width direction of the clamping member 4. When the clamping member 4 clamps a falling object, the clamping protrusions 44 will be embedded in the surface of the object, increasing the friction coefficient between the two, and can provide greater friction, thereby clamping the object more firmly and reducing the unstable clamping caused by the sliding of the object. When clamping some cylindrical or spherical objects, the clamping protrusions 44 can play a role in preventing the object from rolling. For example, when clamping a circular steel pipe, the clamping protrusions 44 on the clamping member 4 can limit the rolling of the steel pipe in the horizontal direction. For objects with irregular shapes or uneven surfaces, the clamping protrusions 44 can fill the gap between the object and the clamping member 4. For example, when clamping an object with a groove, the clamping protrusions 44 can enter the groove part of the object, so that the clamping member 4 fits more closely with the surface of the object, thereby achieving a more stable clamping.
[0037] See again Figure 2 The support member 3 and the outer tube 2 are rotatably arranged. When the support member 3 and the outer tube 2 rotate relatively, the second portion 42 is separated from the abutting portion 21.
[0038] In practical applications, multiple clamping members 4 are arranged at intervals, so multiple abutment portions 21 are arranged at intervals along the circumferential direction of the outer tube 2, and the support member 3 and the outer tube 2 can rotate relative to each other, which can be the rotation of the support member 3 or the rotation of the outer tube 2. When the two rotate relative to each other, the second portion 42 separates from the abutment portion 21. When the second portion 42 is not subjected to the abutment effect, the clamping member 4 can no longer clamp the dropped object, so that the clamping member 4 is separated from the dropped object, which can effectively prevent the overshot from being stuck and unable to be extracted from the oil well. Specifically, when the dropped object is stuck in the well, or the dropped object is too heavy and the overshot used is not able to bear the load, it is necessary to take out the overshot separately and replace it with a more suitable device for salvage. Therefore, the present application sets the support member 3 and the outer tube 2 into a relatively rotatable structure. Only by rotating the support member 3 or rotating the outer tube 2, the second portion 42 is separated from the abutment portion 21, and the clamping member 4 can release the dropped object, so as to achieve the function of taking out the overshot separately.
[0039] At the same time, after the clamping member 4 releases the dropped object, the supporting member 3 moves toward the connecting head 1, and retracts the clamping member 4 into the outer tube 2. When the first portion 41 of the clamping member 4 is opposite to the abutting portion 21, the supporting member 3 or the outer tube 2 is rotated again, so that the clamping member 4 returns to the position opposite to the abutting portion 21, and the clamping member 4 is in a state of waiting for abutment again, so as to facilitate the next salvage use.
[0040] See again Figure 2The overshot tube further includes an elastic member 6, which is elastically connected between the clamping member 4 and the supporting member 3 to push the clamping member 4 to rotate in a direction away from the supporting member 3.
[0041] In actual application, when the second part 42 is separated from the abutment part 21, in order to facilitate the clamping member 4 to quickly release the dropped object, an elastic member 6 is provided between the clamping member 4 and the support member 3. Specifically, the elastic member 6 can be provided between the third part 43 and the support member 3. When the second part 42 is in contact with the abutment part 21, the clamping member 4 rotates and clamps the dropped object. At this time, the third part 43 squeezes the elastic member 6, so that the elastic member 6 accumulates elastic potential energy. When the second part 42 is separated from the abutment part 21, the elastic member 6 releases the elastic potential energy and pushes the third part 43 to rotate away from the support member 3, that is, pushes the clamping member 4 to return to its original state, and the clamping member 4 releases the dropped object. The elastic member 6 can not only make the clamping member 4 release the dropped object more quickly, but also prevent the clamping member 4 from being stuck in the dropped object, resulting in the clamping member 4 being unable to separate from the dropped object.
[0042] It is understandable that the elastic member 6 can be a metal spring sheet; metal materials have good elastic deformation ability. Compared with other materials, it can deform to a greater extent when subjected to force, and can quickly return to its original shape when the external force is removed; the metal elastic member 6 usually has a higher strength and can withstand greater stress without damage.
[0043] See also Figure 4 One end of the elastic member 6 can be fixedly connected to the support member 3, and the other end can be slidably connected or fixedly connected to the clamping member 4.
[0044] In practical applications, the elastic member 6 can be connected to the support member 3 by welding or the like, or can be connected to the clamping member 4 by welding, so that the connection of the elastic member 6 is more stable; at the same time, the elastic member 6 can also be slidably connected to the clamping member 4. When the elastic member 6 is squeezed, one end slides on the clamping member 4. This method can effectively prevent the elastic member 6 from being squeezed beyond its own elastic limit, causing permanent deformation of the elastic member 6.
[0045] See also Figure 5 One end of the elastic member 6 can be plugged into the supporting member 3 , and the other end can be slidably connected or fixedly connected to the clamping member 4 .
[0046] Specifically, the support member 3 is provided with a slot 31, one end of the elastic member 6 is connected to the slot 31 by plugging, and the other end is preferably slidably connected to the clamping member 4. This arrangement is conducive to the replacement and removal of the elastic member 6, thereby improving the practicality of the device.
[0047] See also Figure 3, the number of the abutting portions 21 is multiple, the multiple abutting portions 21 are arranged at intervals in the circumferential direction of the outer cylinder 2, and an accommodating cavity 22 is formed between two adjacent abutting portions 21; the number of the clamping members 4 is the same as that of the abutting portions 21; in the circumferential direction of the outer cylinder 2, the length of the clamping member 4 is less than that of the abutting portion 21, and the length of the clamping member 4 is less than that of the accommodating cavity 22.
[0048] In practical applications, in the circumferential direction of the outer cylinder 2, the length of the clamping member 4 is less than that of the abutting portion 21. Specifically, the length of the second portion 42 is less than that of the abutting portion 21, which is beneficial for the abutting portion 21 to abut against the second portion 42. The abutting portion 21 can abut against the second portion 42 more stably and provide a greater abutting force to the second portion 42. At the same time, the length of the accommodating cavity 22 is greater than that of the second portion 42. When the support member 3 or the outer cylinder 2 rotates, the accommodating cavity 22 can accommodate the second portion 42, so that the second portion 42 can be smoothly separated from the abutting portion 21.
[0049] Refer to again Figure 1 , the fishing barrel includes an inner cylinder 5, the inner cylinder 5 is rotatably connected to the connecting head 1, the support member 3 is slidably connected to the inner cylinder 5, and the outer cylinder 2 and the inner cylinder 5 are rotatably arranged.
[0050] In this embodiment, one end of the connecting head 1 is connected to the driving device, and the other end is connected to the outer cylinder 2. The inner cylinder 5 is rotatably connected to the inner side surface of the connecting head 1, and the support member 3 is connected to the inner cylinder 5. When it is necessary for the clamping member 4 to disengage from the dropped object, the driving device drives the connecting head 1 to rotate, and the connecting head 1 drives the outer cylinder 2 to rotate, so that the second portion 42 is separated from the abutting portion 21, and then the clamping member 4 is disengaged from the dropped object.
[0051] This application adopts the method of rotating the outer cylinder 2. On the one hand, the outer cylinder 2 is in a separated state from the dropped object, and it is more convenient to rotate the outer cylinder 2 than to rotate the inner cylinder 5. Rotating the inner cylinder 5 drives the clamping member 4 to rotate, and the clamping member 4 will drive the dropped object to rotate, so that the dropped object collides in the well, hindering the rotation and causing damage to the clamping member 4. On the other hand, the connecting head 1 is located outside and is more convenient to be connected to the driving device, which is convenient for installation and disassembly.
[0052] Refer to again Figure 1 , the inner cylinder 5 is hermetically connected to the support member 3, the inner cylinder 5 and the support member 3 enclose a hydraulic cavity 51, the connecting head 1 is provided with a communication hole 11, and the hydraulic cavity 51 is connected to the communication hole 11. The communication hole 11 is used to connect the injection pressure device.
[0053] In this embodiment, the support member 3 is pushed to slide by hydraulic means. Specifically, the inner cylinder 5 is provided with a hydraulic cavity 51, the connecting head 1 is provided with a communication hole 11, the communication hole 11 is connected to an external injection pressure device, and the injection pressure device injects hydraulic oil into the hydraulic cavity 51 to push the support member 3 to move.
[0054] It is understandable that in some other embodiments, other means may also be adopted to drive the support member 3 to move, and the present application does not limit this.
[0055] Different from the prior art, the embodiment of the present application provides a fishing barrel, which includes a connection head 1, an outer barrel 2, a support member 3 and a clamping member 4. The outer barrel 2 is connected to the connection head 1; the support member 3 can move along the length direction of the outer barrel 2; the clamping member 4 is rotatably connected to the support member 3, and the clamping member 4 can selectively extend out of the outer barrel 2; wherein, the clamping member 4 includes a first part 41 and a second part 42, the first part 41 is connected to one end of the second part 42 away from the support member 3, and an abutting part 21 is provided on one side of the outer barrel 2 facing the clamping member 4; along the length direction of the outer barrel 2, the first part 41 does not abut against the abutting part 21, and the second part 42 abuts against the abutting part 21. Compared with the prior art, the clamping member 4 of the present application is provided with a first part 41 and a second part 42. The extending direction of the first part 41 is parallel to the length direction of the outer barrel 2, and the first part 41 does not abut against the abutting part 21. The extending direction of the second part 42 forms an angle with the length direction of the outer barrel 2 and abuts against the abutting part 21; when the first part 41 extends out of the outer barrel 2, the distance between the first parts 41 of multiple clamping members 4 remains unchanged, maintaining the maximum clamping space, which is conducive to the falling object entering the clamping space; due to the inclined setting of the second part 42, under the abutting action of the abutting part 21, the second part 42 rotates towards the direction close to the support member 3, and then multiple clamping members 4 are in a contracted state, the clamping space shrinks, and the clamping member 4 clamps the falling object. Finally, the outer barrel 2 is pulled out of the oil well by an external device to realize the function of fishing for the dropped fish.
[0056] The above are only the specific embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.
Claims
1. An overshot, characterized in that: include: Connector (1); An outer cylinder (2) connected to the connector (1); A support member (3), wherein the support member (3) is movable along the length direction of the outer cylinder (2); A clamping member (4) is rotatably connected to the supporting member (3), and the clamping member (4) can selectively extend out of the outer cylinder (2); The clamping member (4) comprises a first portion (41) and a second portion (42), the first portion (41) being connected to an end of the second portion (42) away from the supporting member (3), and a contact portion (21) is provided on a side of the outer tube (2) facing the clamping member (4); along the length direction of the outer tube (2), the first portion (41) is not in contact with the contact portion (21), and the second portion (42) is in contact with the contact portion (21).
2. The overshot according to claim 1, characterized in that: The clamping member (4) comprises a third part (43), the third part (43) is connected to an end of the second part (42) away from the first part (41), and the third part (43) is rotatably connected to the supporting member (3).
3. The overshot according to claim 2, characterized in that: A plurality of clamping protrusions (44) are provided on a side of the clamping member (4) facing away from the abutting portion (21).
4. The overshot according to claim 1, characterized in that: The support member (3) and the outer cylinder (2) are rotatably arranged, and when the support member (3) and the outer cylinder (2) rotate relatively, the second portion (42) is separated from the abutting portion (21).
5. The overshot according to claim 4, characterized in that: The overshot tube comprises an elastic member (6), wherein the elastic member (6) is elastically connected between the clamping member (4) and the supporting member (3) to push the clamping member (4) to rotate in a direction away from the supporting member (3).
6. The overshot according to claim 5, characterized in that: One end of the elastic member (6) is fixedly connected to the support member (3), and the other end is slidably connected or fixedly connected to the clamping member (4).
7. The overshot according to claim 5, characterized in that: One end of the elastic member (6) is plugged into the support member (3), and the other end is slidably connected or fixedly connected to the clamping member (4).
8. The overshot according to claim 4, characterized in that: The number of the abutting portions (21) is plural, and the plurality of abutting portions (21) are arranged at intervals along the circumferential direction of the outer tube (2), and an accommodating cavity (22) is formed between two adjacent abutting portions (21). The number of the clamping members (4) is consistent with the number of the abutting portions (21); along the circumferential direction of the outer tube (2), the length of the clamping member (4) is smaller than the length of the abutting portion (21), and the length of the clamping member (4) is smaller than the length of the accommodating cavity (22).
9. The overshot according to claim 4, characterized in that: The salvage tube comprises an inner tube (5), the inner tube (5) is rotatably connected to the connector (1), the support member (3) is slidably connected to the inner tube (5), and the outer tube (2) and the inner tube (5) are rotatably arranged.
10. An overshot according to claim 9, characterized in that The inner tube (5) is sealedly connected to the support member (3), and the inner tube (5) and the support member (3) are surrounded to form a hydraulic chamber (51). The connecting head (1) is provided with a connecting hole (11), and the hydraulic chamber (51) is connected to the connecting hole (11), and the connecting hole (11) is used to connect an injection molding device.