Energy storage type automatic clamping-releasing fisher

Abstract

The invention discloses an energy storage type automatic releasing fisher, and relates to the technical field of wire-line coring drilling, the energy storage type automatic releasing fisher comprises a connecting assembly, a releasing assembly and a fishing assembly, the releasing assembly comprises an elastic piece, a deformation piece, a releasing pipe and a limiting pipe, the limiting pipe is connected with the connecting assembly, and the limiting pipe is sleeved with the releasing pipe; the fishing assembly is provided with a connecting rod, the connecting rod can stretch into the limiting pipe, a guide block is obliquely arranged on the outer wall of the connecting rod, a guide groove is obliquely formed in the inner wall of the limiting pipe, and the guide block is slidably arranged in the guide groove. The deformation piece is arranged in the limiting pipe, the two ends of the deformation piece abut against the top of the guide groove and the end of the connecting rod correspondingly, a fixing key is arranged on the outer wall of the limiting pipe, the end, close to the fishing assembly, of the clamping-releasing pipe is provided with an inclined face, and a sliding groove is formed in the clamping-releasing pipe in the axis direction and communicates with the inclined face. According to the invention, automatic release can be realized without cutting off the steel wire rope, so that resources are saved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireline coring drilling, and particularly to an energy storage type automatic card releasing fishing tool. Background Art

[0002] The wireline coring technology can set a fishing tool in the drill pipe. The fishing tool can engage with the core inner tube assembly, and then use a wire rope to quickly lift the fishing tool and the core inner tube assembly from the bottom of the hole to the surface. However, as the drilling depth gets deeper and deeper, a series of limitations of the current wireline coring technology have also emerged. For example, for the construction of scientific drilling wells, especially ultra-deep scientific drilling wells, although the wireline coring technology can significantly reduce the construction period, there may be jamming of the core inner tube assembly during wireline coring, which may cause the fishing tool engaged with the core inner tube assembly to be unable to be smoothly lifted out. In the face of such problems, the traditional method is to use a dropped card releasing tool to impact and release the card so that the fishing tool and the wire rope can be recovered from the well. This method is widely used and effective in shallow holes or general deep holes, but for ultra-deep hole drilling construction, the method of using a dropped card releasing tool takes a long time and there may also be a situation where the card cannot be successfully released. Once the dropped card releasing tool fails to release the card successfully for the first time, the wire rope needs to be cut, and then the drill pipe and the core inner tube need to be taken out completely, wasting time and energy. Therefore, there is an urgent need for an energy storage type automatic card releasing fishing tool to solve the above technical problems. Summary of the Invention

[0003] The purpose of the present invention is to provide an energy storage type automatic card releasing fishing tool to solve the problems existing in the above prior art, which can realize automatic card releasing and does not need to cut the wire rope, saving resources.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The present invention provides an energy storage type automatic card releasing fishing tool, which includes a connection assembly, a card releasing assembly and a fishing assembly. The connection assembly is used to connect with a driving device, and the fishing assembly is used to be clamped with a core inner tube assembly. The card releasing assembly includes an elastic member, a deformation member, a card releasing tube and a limiting tube. The limiting tube is connected with the connection assembly, the card releasing tube is sleeved outside the limiting tube. Two ends of the elastic member respectively abut against one end of the connection assembly far away from the fishing assembly and one end of the card releasing tube far away from the fishing assembly, and is in a compressed state. The fishing assembly has a connecting rod, the connecting rod can extend into the limiting tube, a guiding block is obliquely arranged on the outer wall of the connecting rod, a guiding groove is obliquely arranged on the inner wall of the limiting tube, and the guiding block is slidably arranged in the guiding groove. The deformation member is arranged inside the limiting tube and two ends of the deformation member respectively abut against the top of the guiding groove and the end of the connecting rod. A fixing key is arranged on the outer wall of the limiting tube. One end of the card releasing tube close to the fishing assembly has an inclined surface, and a sliding groove is arranged on the card releasing tube along the axial direction, and the sliding groove communicates with the inclined surface. When in the first state, the fixing key abuts against the inclined surface, and the connecting rod abuts against the top of the guiding groove through the deformation member. When in the second state, the guiding block slides along the guiding groove, the fixing key can move into the sliding groove. When the fixing key enters the sliding groove, under the action of the elastic member, the card releasing tube moves towards the fishing assembly, and the card releasing tube can press a control member of the fishing assembly to enable the fishing assembly to release the core inner tube assembly.

[0006] In some embodiments, one end of the fixing key far away from the fishing assembly has a first inclined surface, and the inclination degree of the first inclined surface is the same as that of the inclined surface.

[0007] In some embodiments, the guiding block is an arc-shaped guiding block, and the guiding groove is an arc-shaped guiding groove.

[0008] In some embodiments, the length of the sliding groove is a first length, and the length from one end of the card releasing tube close to the fishing assembly to one end of the control member close to the card releasing tube is a second length, and the first length is not less than the second length.

[0009] In some embodiments, a limiting groove is further included. The limiting groove is arranged on the card releasing tube along the direction parallel to the axis of the card releasing tube. A limiting column is fixedly arranged on the connecting rod, and the limiting column is slidably arranged in the limiting groove.

[0010] In some embodiments, two limiting grooves are arranged along the diameter direction of the card releasing tube, and two limiting columns are arranged along the diameter direction of the connecting rod. The two limiting columns are respectively slidably arranged in the limiting grooves.

[0011] In some embodiments, the connection assembly includes a rope clip sleeve, a core hole is provided inside the rope clip sleeve, the core hole is used for clamping the rope end, and the rope clip sleeve is used for fixedly connecting with the limit pipe.

[0012] In some embodiments, the connection assembly further includes a weight, and both ends of the weight are fixedly connected with the rope clip sleeve and the limit pipe respectively.

[0013] In some embodiments, the elastic member is a first spring, and the first spring is sleeved on the weight, and the deformation member is a second spring.

[0014] In some embodiments, the fishing assembly includes a fishing frame, a mounting pipe and a spring. The mounting pipe is fixedly connected with the connecting rod. The fishing frame includes a first arm and a second arm arranged inside the mounting pipe. The middle part of the first arm is rotatably connected with the middle part of the second arm. Both ends of the spring are respectively arranged at one end of the first arm close to the connecting rod and one end of the second arm close to the connecting rod, and both the end of the first arm close to the connecting rod and the end of the second arm close to the connecting rod can extend out of the mounting pipe. The part of the first arm extending out of the mounting pipe and the part of the second arm extending out of the mounting pipe are the control members.

[0015] The present invention has achieved the following technical effects compared with the prior art:

[0016] The first state of the energy storage type automatic release fishing tool provided by the present invention is a stable connection state. That is, when the energy storage type automatic release fishing tool is lowered, the fixed key abuts against the inclined surface, so that the position of the release pipe is relatively fixed. The connecting rod abuts against the top of the guide groove through the deformation member, and the fishing assembly is clamped in the core inner pipe assembly. When the core inner pipe assembly encounters a blockage, it needs to be switched from the first state to the second state. The specific switching process is as follows: increase the force of the driving device to lift the connection assembly, so that the guide block slides along the guide groove until the fixed key on the limit pipe rotates to the chute (it should be noted that due to the existence of the deformation member, even if the connecting rod cannot move, but under the deformation of the deformation member, the limit pipe can move in the axial direction relative to the connecting rod). After the fixed key enters the chute, under the action of the elastic member, the release pipe moves towards the fishing assembly until the release pipe moves to the control member of the fishing assembly. The release pipe presses the control member to release the core inner pipe assembly, realizing release without cutting the steel wire rope, saving resources. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the first angle of the energy storage type automatic release fishing tool in some embodiments of the present invention;

[0019] Figure 2 It is a schematic diagram of the second angle of the energy storage type automatic release fishing tool in some embodiments of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the energy storage type automatic release fishing tool in some embodiments of the present invention;

[0021] Figure 4 It is a schematic diagram of the first angle of the three-dimensional structure of the energy storage type automatic release fishing tool in some embodiments of the present invention;

[0022] Figure 5 It is a schematic diagram of the second angle of the three-dimensional structure of the energy storage type automatic release fishing tool in some embodiments of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the fishing assembly in some embodiments of the present invention.

[0024] In the figure: 1 - rope clamp sleeve; 2 - core hole; 3 - connecting shaft; 4 - upper gland; 5 - bearing; 6 - washer; 7 - castle nut; 8 - weight; 9 - elastic member; 10 - release tube; 101 - inclined surface; 102 - chute; 103 - limit groove; 11 - limit tube; 1101 - fixed key; 1102 - first inclined surface; 12 - deformation member; 13 - connecting rod; 1301 - guide block; 14 - limit post; 15 - rivet; 16 - spring; 17 - elastic pin; 18 - first arm; 19 - second arm; 20 - mounting tube; 21 - hexagon nut; 22 - nipple; 23 - locking sleeve. Detailed implementation manners

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0026] The object of the present invention is to provide an energy storage type automatic card releasing fishing tool to solve the problems existing in the prior art, which can achieve automatic card releasing without cutting the wire rope, saving resources.

[0027] To make the above objects, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] As Figures 1-6 shown, the present invention provides an energy storage type automatic card releasing fishing tool, including a connection assembly, a card releasing assembly and a fishing assembly. The connection assembly is used to connect with a driving device, and the fishing assembly is used to be clamped with a core inner tube assembly; the card releasing assembly includes an elastic member 9, a deformation member 12, a card releasing tube 10 and a limiting tube 11. The limiting tube 11 is connected with the connection assembly. The card releasing tube 10 is sleeved outside the limiting tube 11. Two ends of the elastic member 9 respectively abut against one end of the connection assembly away from the fishing assembly and one end of the card releasing tube 10 away from the fishing assembly and are in a compressed state. The fishing assembly has a connecting rod 13. The connecting rod 13 can extend into the limiting tube 11. A guiding block 1301 is obliquely arranged on the outer wall of the connecting rod 13. A guiding groove is obliquely arranged on the inner wall of the limiting tube 11. The guiding block 1301 is slidably arranged in the guiding groove. The deformation member 12 is arranged inside the limiting tube 11 and its two ends respectively abut against the top of the guiding groove and the end of the connecting rod 13. A fixing key 1101 is arranged on the outer wall of the limiting tube 11. One end of the card releasing tube 10 close to the fishing assembly has an inclined surface 101, and a sliding groove 102 is arranged on the card releasing tube 10 along the axial direction. The sliding groove 102 communicates with the inclined surface 101; when in the first state, the fixing key 1101 abuts against the inclined surface 101, and the connecting rod 13 abuts against the top of the guiding groove through the deformation member 12; when in the second state, the guiding block 1301 slides along the guiding groove, and the fixing key 1101 can move into the sliding groove 102. When the fixing key 1101 enters the sliding groove 102, under the action of the elastic member 9, the card releasing tube 10 moves towards the fishing assembly, and the card releasing tube 10 can press a control member of the fishing assembly to enable the fishing assembly to release the core inner tube assembly.

[0029] During use: The first state is a stable connection state. That is, when lowering the energy storage type automatic release fishing tool, the fixed key 1101 abuts against the inclined surface 101, making the position of the release pipe 10 relatively fixed. The connecting rod 13 abuts against the top of the guiding groove through the deformation member 12, and the fishing assembly is clamped to the core inner pipe assembly. When the core inner pipe assembly encounters a jam, it is necessary to switch from the first state to the second state. The specific conversion process is as follows: Increase the force of the driving device to lift the connecting component, so that the guiding block slides along the guiding groove until the fixed key 1101 on the limiting pipe 11 rotates to the sliding groove 102 (it should be noted that due to the existence of the deformation member 12, even if the connecting rod 13 cannot move, but under the deformation of the deformation member 12, the limiting pipe 11 can move in the axial direction relative to the connecting rod 13). After the fixed key 1101 enters the sliding groove 102, under the action of the elastic member 9, the release pipe 10 moves towards the fishing assembly until the release pipe 10 moves to the control member of the fishing assembly. The release pipe 10 presses the control member to make the fishing assembly release the core inner pipe assembly, achieving release without having to cut the wire rope, saving resources.

[0030] As a feasible embodiment, the energy storage type automatic release fishing tool includes a connecting component, a release component, and a fishing component. The connecting component is used to connect with the driving device, and the fishing component is used to be clamped to the core inner pipe assembly. The release component includes an elastic member 9, a deformation member 12, a release pipe 10, and a limiting pipe 11. The limiting pipe 11 is connected to the connecting component. The release pipe 10 is sleeved outside the limiting pipe 11. The two ends of the elastic member 9 respectively abut against one end of the connecting component away from the fishing component and one end of the release pipe 10 away from the fishing component. The fishing component has a connecting rod 13. The connecting rod 13 can extend into the limiting pipe 11. The outer wall of the connecting rod 13 is inclined with a guiding groove. The inner wall of the limiting pipe 11 is inclined with a guiding block, and the inclination angles of the guiding block and the guiding groove are the same. The guiding block is slidably arranged in the guiding groove. The deformation member 12 is arranged inside the limiting pipe 11 and its two ends respectively abut against the top of the guiding block and the end of the connecting rod 13. When in the first state, the fixed key 1101 abuts against the inclined surface 101, and the connecting rod 13 abuts against the top of the guiding block through the deformation member 12. When in the second state, the guiding groove slides along the guiding block, and the fixed key 1101 can move to the sliding groove 102. When the fixed key 1101 enters the sliding groove 102, under the action of the elastic member 9, the release pipe 10 moves towards the fishing assembly, and the release pipe 10 can press the control member of the fishing assembly to make the fishing assembly release the core inner pipe assembly.

[0031] During use: The first state is a stable connection state. That is, when lowering the energy storage type automatic release fishing tool, the fixed key 1101 abuts against the inclined surface 101, making the position of the release pipe 10 relatively fixed. The connecting rod 13 abuts against the top of the guiding block through the deformation member 12, and the fishing assembly is engaged with the core inner pipe assembly. When the core inner pipe assembly encounters a jam, it needs to be switched from the first state to the second state. The specific switching process is as follows: Increase the force of the driving device to lift the connecting assembly, so that the guiding groove slides along the guiding block until the fixed key 1101 on the limiting pipe 11 rotates into the sliding groove 102 (it should be noted that due to the existence of the deformation member 12, even if the connecting rod 13 cannot move, but under the deformation of the deformation member 12, the limiting pipe 11 can move in the axial direction relative to the connecting rod 13). After the fixed key 1101 enters the sliding groove 102, under the action of the elastic member 9, the release pipe 10 moves towards the control member of the fishing assembly until the release pipe 10 moves to the control member of the fishing assembly. The release pipe 10 presses the control member to release the fishing assembly from the core inner pipe assembly, achieving release without having to cut the wire rope, saving resources.

[0032] In some embodiments, one end of the fixed key 1101 away from the fishing assembly has a first inclined surface 1102, and the inclination degree of the first inclined surface 1102 is the same as that of the inclined surface 101. During the process of the energy storage type automatic release fishing tool switching from the first state to the second state, due to the same inclination degree of the first inclined surface 1102 and the inclined surface 101, it makes the fixed key 1101 slide more smoothly along the inclined surface 101 into the sliding groove 102, reducing the obstruction and friction caused by inconsistent inclined surface angles between the two, ensuring the stability and reliability of the state switching process. Moreover, the design with the same inclination degree enables the fixed key 1101 to precisely cooperate with the inclined surface 101 on the release pipe 10, ensuring that in the first state, the fixed key 1101 can stably abut against the inclined surface 101, maintaining the relative fixation of the position of the release pipe 10, ensuring the stability of the connection during the normal operation of the fishing tool, and avoiding accidental movement of the release pipe 10 due to inaccurate cooperation, which may affect the engagement of the fishing assembly with the core inner pipe assembly.

[0033] In some embodiments, the guiding block 1301 is an arc-shaped guiding block, and the guiding groove is an arc-shaped guiding groove. The arc-shaped guiding block and the guiding groove cooperate with each other. Compared with a linear guiding structure, the contact area between the two is larger. The larger contact area can make the force transmission more uniform, reduce the local stress concentration, thereby reducing the wear rate of the guiding block and the guiding groove, prolonging the service life of the component, and improving the overall reliability of the fishing tool. Moreover, the arc-shaped structure can better guide the movement trajectory of the connecting rod 13, making the sliding of the connecting rod 13 in the guiding groove smoother. During the process of the fishing tool transitioning from the first state to the second state, the movement of the connecting rod 13 is more stable, avoiding the jamming or jumping phenomenon that may occur due to linear guiding, and ensuring that the unlocking process can be carried out accurately and reliably. The setting of the arc-shaped guiding groove enables the fixing key 1101 to rotate and move upward along the inclined surface 101 when a force is applied. During the upward lifting process after jamming, the connecting rod 13 has no axial displacement relative to the fishing frame, but may rotate circumferentially. The limiting post 14 described below ensures that the unlocking tube 10 has no circumferential rotational movement relative to the connecting rod 13. During the upward lifting process, the limiting tube 11 moves upward and rotates along the connecting rod 13 (since the unlocking tube 10 is circumferentially stationary relative to the connecting rod 13, the limiting tube 11 must rotate during the axial movement). If the guiding groove is not set as an arc-shaped guiding groove, during the upward movement, the limiting tube 11 may remain relatively stationary relative to the connecting rod 13, and the fixing key 1101 cannot smoothly enter the sliding groove 102.

[0034] In some embodiments, the length of the sliding groove 102 is a first length, and the length from the end of the unlocking tube 10 close to the fishing assembly to the end of the control member close to the unlocking tube 10 is a second length. The first length is not less than the second length, preferably the first length is greater than the second length. When the fixing key 1101 enters the sliding groove 102, the unlocking tube 10 moves towards the fishing assembly under the action of the elastic member 9. Since the first length is not less than the second length, this ensures that the unlocking tube 10 has sufficient moving stroke to smoothly move to the control member of the fishing assembly and press it, thereby loosening the core inner tube assembly of the fishing assembly and ensuring that the unlocking action can be completed and effectively achieved, avoiding the situation of unlocking failure due to insufficient moving distance of the unlocking tube 10. In actual fishing operations, various different working conditions and jamming situations may be encountered, resulting in different moving distances required for the unlocking tube 10 to unlock. The design that the first length is not less than the second length provides sufficient margin for the movement of the unlocking tube 10, enabling it to adapt to a variety of different working conditions. Regardless of the degree of jamming, it can ensure that the unlocking tube 10 has sufficient stroke to trigger the unlocking action, enhancing the adaptability and reliability of the fishing tool to complex working environments.

[0035] In some embodiments, the energy storage type automatic card releasing fishing tool further includes a limiting groove 103. The limiting groove 103 is arranged on the releasing pipe 10 along a direction parallel to the axis of the releasing pipe 10. A limiting post 14 is fixedly arranged on the connecting rod 13, and the limiting post 14 is slidably arranged in the limiting groove 103. The limiting groove 103 is arranged along a direction parallel to the axis of the releasing pipe 10, and the limiting post 14 is slidably arranged in the limiting groove 103, which can provide accurate guidance for the movement of the releasing pipe 10. During the operation of the fishing tool, especially when converting from the first state to the second state, the movement direction of the releasing pipe 10 is effectively constrained, so that it can only move along the axis direction of the connecting rod 13, avoiding the shaking or deviation of the releasing pipe 10 in other directions, ensuring the accuracy of the relative positions between various components, and thus improving the reliability and stability of the card releasing action.

[0036] In some embodiments, there are two limiting grooves 103 arranged along the diameter direction of the releasing pipe 10, and two limiting posts 14 are arranged along the diameter direction of the connecting rod 13. The two limiting posts 14 are respectively slidably arranged in the limiting grooves 103. The cooperation between the two limiting posts 14 and the corresponding limiting grooves 103 enables the stress to be more evenly distributed on the releasing pipe 10 and the connecting rod 13 when the releasing pipe 10 moves or is stressed, which can avoid the phenomenon of local stress concentration that may be caused by a single limiting structure, reduce the risk of component damage due to stress concentration, extend the service life of related components such as the releasing pipe 10 and the connecting rod 13, and improve the overall structural strength and durability of the fishing tool. Moreover, the symmetric arrangement makes the structure of the fishing tool more symmetric and balanced, can more precisely control the movement trajectory of the releasing pipe 10, ensure that the releasing pipe 10 can accurately reach the predetermined position during the card releasing process, and enable the releasing pipe 10 to accurately press the control part of the fishing assembly, so as to achieve accurate card releasing.

[0037] In some embodiments, the connecting component includes a rope clamp sleeve 1. A core clamping hole 2 is arranged inside the rope clamp sleeve 1. The core clamping hole 2 is used for clamping the rope end, and the rope clamp sleeve 1 is used for fixedly connecting with the limiting pipe 11. The design of the core clamping hole 2 can firmly clamp the rope end, ensuring the stable and reliable connection between the rope and the energy storage type automatic card releasing fishing tool. During the fishing operation, the rope needs to bear a large tensile force. The core clamping hole 2 can effectively prevent the rope end from slipping out of the rope clamp sleeve 1, avoiding problems such as fishing failure or equipment damage caused by loose rope connection.

[0038] In some embodiments, the connecting component further includes a plumb bob 8. Both ends of the plumb bob 8 are fixedly connected to the rope clamp sleeve 1 and the limiting tube 11 respectively. The plumb bob 8 has a relatively large mass. By utilizing its gravitational force, the energy storage type automatic release fishing tool can rapidly descend within the drill pipe. During deep hole operations, it can effectively save the time for the energy storage type automatic release fishing tool to reach the core barrel at the bottom of the hole, thereby improving work efficiency. When the energy storage type automatic release fishing tool descends to the bottom of the hole, the inertial impact force of the plumb bob 8 helps the fishing component to more firmly hook the fishing spear of the inner core barrel assembly. Especially in some complex downhole environments, such as when there is a certain resistance or the position of the fishing spear is not very accurate, the impact force generated by the plumb bob 8 can help the fishing component to reliably connect with the inner core tube assembly.

[0039] As a preferred embodiment, the connecting component further includes a connecting shaft 3 and an upper gland 4. Both ends of the connecting shaft 3 are fixedly connected to the rope clamp sleeve 1 and the upper gland 4 respectively. After the connecting shaft 3 passes through the upper gland 4, a grooved nut 7 is threadedly connected. The grooved nut 7 locks the upper gland 4 and the connecting shaft 3. A bearing 5 is also connected to the connecting shaft 3. The connecting shaft 3 is fixedly connected to the inner ring of the bearing 5, and the outer ring of the bearing 5 is fixedly connected to the plumb bob 8. Moreover, the bearing 5 is arranged between the grooved nut 7 and the upper gland 4. A washer 6 is also arranged between the grooved nut 7 and the bearing 5, which plays a certain buffering and protective role. The washer 6 can reduce the direct pressure on the bearing 5 when the grooved nut 7 is tightened, preventing the bearing 5 from being damaged due to excessive force.

[0040] In some embodiments, the elastic member 9 is a first spring, and the first spring is sleeved on the plumb bob 8, and the deformation member 12 is a second spring. As the elastic member 9, the first spring can provide a stable elastic restoring force for the release tube 10. When the fishing tool is in the first state, the first spring is in a compressed state to store elastic potential energy. In the case of needing to release the card, the first spring releases the elastic potential energy and pushes the release tube 10 towards the fishing component to ensure the smooth progress of the release action. This stable elastic force output ensures the reliability and consistency of the release process without being interfered by other factors. As the deformation member 12, the second spring has good elastic deformation ability. During the operation of the fishing tool, when the inner core tube assembly encounters a blockage, the limiting tube 11 is subjected to an external force, and the second spring can undergo elastic deformation, allowing the limiting tube 11 to move in the axial direction relative to the connecting rod 13, so that the fixed key 1101 can rotate to the sliding groove 102 to trigger the release mechanism.

[0041] It should be noted that the elastic member 9 and the deformation member 12 can also be other devices, such as composite materials or rubbers with good elasticity. The setting forms of the elastic member 9 and the deformation member 12 can also be adjusted. For example, multiple elastic members 9 are arranged along the circumferential direction of the plumb bob 8, and multiple deformation members 12 are arranged along the circumferential direction of the connecting rod 13.

[0042] In some embodiments, the salvage assembly includes a salvage frame, a mounting tube 20 and a spring 16, the mounting tube 20 is fixedly connected to the connecting rod 13 by threads, and is further locked by a hexagonal nut 21. Specifically, the salvage assembly also includes a short circuit 22 and a locking sleeve 23, the short circuit 22 is threadedly connected to the connecting rod 13, the first end of the locking sleeve 23 is threadedly connected to the short circuit 22, and the mounting tube 20 is threadedly connected to the second end of the locking sleeve 23. When the salvage frame is replaced according to different salvage requirements, it is only necessary to unscrew the connecting thread between the hook frame and the locking sleeve 23. The salvage frame includes a first arm 18 and a second arm 19 disposed inside the mounting tube 20, the middle portion of the first arm 18 is rotatably connected to the middle portion of the second arm 19, the two ends of the spring 16 are respectively disposed at one end of the first arm 18 close to the connecting rod 13 and one end of the second arm 19 close to the connecting rod 13, and the one end of the first arm 18 close to the connecting rod 13 and the one end of the second arm 19 close to the connecting rod 13 can both extend out of the mounting tube 20, and the portion of the first arm 18 extending out of the mounting tube 20 and the portion of the second arm 19 extending out of the mounting tube 20 are control components. The spring 16 is connected to one end of the first arm 18 and the second arm 19 close to the connecting rod 13, and when the salvage assembly is engaged with the core inner tube assembly, the spring 16 is in a tensioned or compressed state to store energy. During the unstuck process, the unstuck tube 10 presses the control component (i.e., the portion of the first arm 18 and the second arm 19 extending out of the mounting tube 20), causing the two arms to rotate and thereby loosen the core inner tube assembly. When the pressure of the unstuck tube 10 disappears, the spring 16 will recover its deformation, driving the first arm 18 and the second arm 19 to reset, so that they can clamp the core inner tube assembly again, realize automatic reset without manual intervention, and improve work efficiency.

[0043] When lowering the connection assembly, the card-release assembly and the salvage assembly, the first arm 18 is close to one end of the connecting rod 13 and the second arm 19 is close to one end of the connecting rod 13 and extends out of the mounting tube 20. At this time, the spring 16 is in a certain state of being neither stretched nor compressed or being compressed. When it is necessary to grab the core inner tube assembly, as the salvage assembly contacts the core inner tube assembly, the core inner tube assembly can open the first arm 18 and the second arm 19. At this time, the spring 16 is compressed. When the hook at the end of the first arm 18 away from the spring 16 and the hook at the end of the second arm 19 away from the spring 16 exceed the big head on the core inner tube assembly, the diameter of the core inner tube assembly decreases, and the spring 16 is slightly compressed to a certain extent, so that the two hooks are close to each other to grab the core inner tube assembly. The change in the opening and closing degree of the first arm 18 and the second arm 19 can improve the adaptability of the salvage assembly to core inner tube assemblies of different sizes and shapes, and expand the scope of application of the equipment.

[0044] As a preferred embodiment, both ends of the spring 16 are fixed to the mounting tube 20 by rivets 15. Two mounting holes are further provided in the interior of the mounting tube 20 along the diameter direction. Openings are provided at the rotational connection positions on the first arm 18 and the second arm 19. The elastic pin 17 passes through the two openings and is inserted into the mounting holes, realizing the rotational connection of the first arm 18 and the second arm 19 within the mounting tube 20.

[0045] In the present invention, specific examples are used to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. An energy storage type automatic card-free salvage device, characterized in that: The camming assembly comprises a connecting assembly, a disengaging assembly and a salvaging assembly, wherein the connecting assembly is used to be connected to a driving device, and the salvaging assembly is used to be clamped with an inner tube assembly of a core; the disengaging assembly comprises an elastic member, a deformation member, a disengaging tube and a limiting tube, wherein the limiting tube is connected to the connecting assembly, the disengaging tube is sleeved outside the limiting tube, the two ends of the elastic member respectively abut against one end of the connecting assembly away from the salvaging assembly and one end of the disengaging tube away from the salvaging assembly, and are in a compressed state; the salvaging assembly comprises a connecting rod, which can extend into the limiting tube, the outer wall of the connecting rod is obliquely provided with a guide block, the inner wall of the limiting tube is obliquely provided with a guide groove, the guide block is slidably provided in the guide groove, the deformation member is provided inside the limiting tube and the two ends are in contact with each other. The ends respectively abut against the top of the guide groove and the end of the connecting rod, the outer wall of the limiting tube is provided with a fixed key, the end of the card-release tube close to the salvage assembly has an inclined surface, and a slide groove is provided on the card-release tube along the axial direction, and the slide groove is connected with the inclined surface; when in a first state, the fixed key abuts against the inclined surface, and the connecting rod abuts against the top of the guide groove through the deformable member; when in a second state, the guide block slides along the guide groove, and the fixed key can move to the slide groove, and when the fixed key enters the slide groove, under the action of the elastic member, the card-release tube moves toward the salvage assembly, and the card-release tube can press the control member of the salvage assembly to make the salvage assembly release the core inner tube assembly.

2. The energy storage type automatic de-stuck salvage device according to claim 1 is characterized in that: One end of the fixing key away from the fishing assembly has a first inclined surface, and the inclination degree of the first inclined surface is the same as the inclination degree of the inclined surface.

3. The energy storage type automatic de-stuck salvage device according to claim 1 is characterized in that: The guide block is an arc-shaped guide block, and the guide groove is an arc-shaped guide groove.

4. The energy storage type automatic de-stuck salvage device according to claim 1, characterized in that: The length of the slideway is a first length, the length from one end of the ejection tube close to the salvage assembly to one end of the control member close to the ejection tube is a second length, and the first length is not less than the second length.

5. The energy storage type automatic de-stuck salvage device according to claim 1 is characterized in that: It also includes a limiting groove, which is arranged on the card-removing tube in a direction parallel to the axis of the card-removing tube. A limiting column is fixedly arranged on the connecting rod, and the limiting column is slidably arranged in the limiting groove.

6. The energy storage type automatic de-stuck salvage device according to claim 5 is characterized in that: Two limiting grooves are arranged along the diameter direction of the card removal tube, and two limiting posts are arranged along the diameter direction of the connecting rod. The two limiting posts are respectively slidably arranged in the limiting grooves.

7. The energy storage type automatic de-stuck salvage device according to claim 1, characterized in that: The connecting assembly comprises a rope clamp, a clamping core hole is arranged inside the rope clamp, the clamping core hole is used for clamping the rope head, and the rope clamp is used for fixed connection with the limiting tube.

8. The energy storage type automatic unstuck salvage device according to claim 7 is characterized in that: The connecting assembly also includes a weight, and two ends of the weight are respectively fixedly connected to the rope clamp and the limiting tube.

9. The energy storage type automatic unstuck salvage device according to claim 8, characterized in that: The elastic member is a first spring, and the first spring is sleeved on the heavy hammer, and the deformable member is a second spring.

10. The energy storage type automatic unstuck salvage device according to claim 1, characterized in that: The salvage assembly includes a salvage frame, a mounting tube and a spring, the mounting tube is fixedly connected to the connecting rod, the salvage frame includes a first arm and a second arm arranged inside the mounting tube, the middle portion of the first arm is rotatably connected to the middle portion of the second arm, the two ends of the spring are respectively arranged at one end of the first arm close to the connecting rod and one end of the second arm close to the connecting rod, and the end of the first arm close to the connecting rod and the end of the second arm close to the connecting rod can both extend out of the mounting tube, and the portion of the first arm extending out of the mounting tube and the portion of the second arm extending out of the mounting tube are the control member.

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