A type of anti-detachment hook for downhole fiber optic logging tools

Abstract

This utility model relates to the field of anti-detachment hook technology, and more particularly to an anti-detachment hook for downhole fiber optic logging tools. It includes a lifting cylinder and a fiber optic cable cylinder. An insertion cylinder is fixedly installed at the lower end of the lifting cylinder, and the insertion cylinder is adapted to fit inside the fiber optic cable cylinder. This utility model uses a cylinder to drive a conical block and a triangular block to press against each other, causing the rotating rod to rotate outwards. The locking buckle at its end can firmly engage with the locking groove inside the fiber optic cable cylinder. This mechanical locking structure effectively prevents the logging tool from loosening or falling off due to vibration, impact, or other factors during lifting, greatly improving the stability of the lifting connection and ensuring the safety of logging operations. Even if the cylinder fails, the spring will still push the conical block downwards, preventing the rotating rod from rotating out of the locking groove, further enhancing the reliability of the device and fundamentally eliminating the risk of the logging tool accidentally falling off during lifting.

Description

Technical Field

[0001] This utility model relates to the field of anti-detachment hook technology, specifically an anti-detachment hook for downhole fiber optic logging tools. Background Technology

[0002] In downhole fiber optic logging operations, the hoisting and connection of logging tools is a crucial step. Traditional logging tool hoisting devices typically employ simple hook or snap-fit ​​structures, which present numerous problems in practical use. First, traditional hooks suffer from poor connection stability, especially in the complex downhole working environment. Vibration, impact, and other factors can easily cause the hooks to loosen or even detach, leading to safety accidents such as logging tools falling. This not only damages expensive logging equipment but can also pose a serious threat to downhole personnel and equipment. Second, the connection and disassembly of traditional hooks are cumbersome, requiring manual operation, consuming significant time and effort, and reducing the efficiency of logging operations. Furthermore, the structural design of traditional hooks is relatively simple, making it difficult to adapt to logging tools of different sizes and shapes, resulting in poor versatility and an inability to meet diverse logging operation needs.

[0003] With the continuous development of fiber optic logging technology, higher requirements are being placed on the safety, reliability, and ease of operation of logging tools. Existing hoisting devices still have shortcomings in terms of connection stability, ease of operation, and versatility, failing to effectively meet the actual needs of downhole fiber optic logging operations. Therefore, developing an anti-detachment hook for downhole fiber optic logging tools that can effectively solve the problems of existing technologies is of significant practical importance.

[0004] Therefore, a downhole fiber optic logging tool anti-detachment hook is needed to improve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide an anti-detachment hook for downhole fiber optic logging tools to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hook for preventing the fall off of a downhole fiber optic logging tool, comprising a lifting cylinder and a fiber optic cable cylinder, wherein an insertion cylinder is fixedly provided at the lower end of the lifting cylinder, the insertion cylinder being adapted to the interior of the fiber optic cable cylinder, and a plurality of rotating rods being rotatably provided inside the insertion cylinder, wherein a docking lock is fixedly provided at one end of the rotating rod, and a docking lock groove adapted to the docking lock is provided inside the fiber optic cable cylinder, the docking lock groove being an annular groove.

[0007] As a preferred embodiment of this utility model, a cylinder is fixedly provided at the upper end of the inside of the hoisting cylinder, and a conical block is fixedly provided at one end of the cylinder.

[0008] As a preferred embodiment of this utility model, a triangular block is fixedly provided on the inner surface of the rotating rod, and the hypotenuse of the triangular block is fitted with the hypotenuse of the conical block.

[0009] As a preferred embodiment of this utility model, the surface of the insertion cylinder is provided with a plurality of through holes, and the through holes are correspondingly provided with the docking lock.

[0010] As a preferred embodiment of this utility model, a fixing rod is fixedly provided at the center of the bottom of the insertion cylinder, and a tension spring is fixedly provided on the surface of the fixing rod, with one end of the tension spring being fixedly connected to the rotating rod.

[0011] As a preferred embodiment of this utility model, a baffle is fixedly provided on the movable end surface of the cylinder, and a spring is sleeved on the upper end of the baffle corresponding to the outer side of the cylinder.

[0012] As a preferred embodiment of this utility model, the hoisting cylinder is connected to the hoisting cable, and the optical cable cylinder is connected to the logging cable.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model utilizes a cylinder to drive the conical block and triangular block to press and squeeze together, causing the rotating rod to rotate outward. The locking buckle at its end can firmly engage with the locking groove inside the optical cable tube. This mechanical locking structure effectively prevents logging tools from loosening or falling off due to vibration, impact, or other factors during hoisting, greatly improving the stability of the hoisting connection and ensuring the safety of logging operations. Even if the cylinder fails, the spring will still push the conical block downward, preventing the rotating rod from rotating out of the locking groove, further enhancing the reliability of the device and fundamentally eliminating the risk of logging tools accidentally falling off during hoisting.

[0015] 2. This utility model adopts cylinder drive to realize automated connection and disconnection operations. When connecting, simply align the insertion tube with the optical cable tube and insert it, and the cylinder will automatically lock the buckle. When disconnecting, the cylinder retracts to quickly unlock. The whole process does not require manual operation of complex mechanical structures, which greatly reduces operation time and labor intensity and significantly improves the efficiency of well logging operations. Attached Figure Description

[0016] Figure 1 This is a three-dimensional cross-sectional structural diagram of the hoisting cylinder of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the hoisting cylinder of this utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the hoisting cylinder of this utility model;

[0019] Figure 4 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the overall front structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the overall internal three-dimensional structure of this utility model;

[0022] Figure 7 This is a schematic diagram of the overall internal front structure of this utility model.

[0023] In the diagram: 1. Cylinder; 2. Spring; 3. Baffle; 4. Rotating rod; 5. Conical block; 6. Triangular block; 7. Tension spring; 8. Fixing rod; 9. Connecting lock; 10. Insertion cylinder; 11. Lifting cylinder; 12. Connecting lock groove; 13. Optical cable cylinder; 14. Through hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] To facilitate understanding of this utility model, a more comprehensive description of it will be provided below with reference to relevant embodiments. Several embodiments of this utility model are given. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0026] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Please see Figure 1-7This utility model provides a technical solution: a downhole fiber optic logging tool anti-drop hook, including a lifting cylinder 11 and an optical cable cylinder 13. An insertion cylinder 10 is fixedly provided at the lower end of the lifting cylinder 11. The insertion cylinder 10 is adapted to the inside of the optical cable cylinder 13. Several rotating rods 4 are rotatably provided inside the insertion cylinder 10. A docking lock 9 is fixedly provided at one end of the rotating rod 4. The optical cable cylinder 13 is provided with a docking lock groove 12 adapted to the docking lock 9. The docking lock groove 12 is an annular groove. The optical cable cylinder 13 is connected to the logging cable. Then, the lifting cylinder 11 is lifted by the lifting cable so that the insertion cylinder 10 is aligned with the opening of the optical cable cylinder 13. The insertion cylinder 10 is inserted into the optical cable cylinder 13. At this time, the outer wall of the insertion cylinder 10 is adapted to the inner wall of the optical cable cylinder 13 to ensure that the insertion cylinder 10 can smoothly enter the optical cable cylinder 13.

[0029] As an example of this utility model, a cylinder 1 is fixedly provided at the upper end of the inside of the hoisting cylinder 11, and a conical block 5 is fixedly provided at one end of the cylinder 1.

[0030] As an example of this utility model, a triangular block 6 is fixedly provided on the inner surface of the rotating rod 4. The hypotenuse of the triangular block 6 is fitted with the hypotenuse of the conical block 5. When the insertion cylinder 10 is fully inserted into the optical cable cylinder 13, the cylinder 1 starts to work, and its movable end extends downward, driving the baffle 3 to move downward. When the baffle 3 moves downward, the baffle 3 pushes the conical block 5 to move downward. When the conical block 5 moves downward, its hypotenuse is fitted and pressed with the hypotenuse of the triangular block 6, and the rotating rod 4 begins to rotate outward. When the rotating rod 4 rotates outward, the docking lock 9 at its end passes through the through hole 14 and gradually approaches the docking lock groove 12 in the optical cable cylinder 13. Finally, the docking lock 9 is engaged in the docking lock groove 12, realizing a firm connection between the hoisting cylinder 11 and the optical cable cylinder 13.

[0031] As an example of this utility model, the surface of the insertion tube 10 is provided with a plurality of through holes 14, and the through holes 14 are correspondingly provided with the docking lock 9.

[0032] As an example of this utility model, a fixing rod 8 is fixedly provided at the bottom center of the insertion tube 10, and a tension spring 7 is fixedly provided on the surface of the fixing rod 8. One end of the tension spring 7 is fixedly connected to the rotating rod 4. When released, the cylinder 1 contracts and drives the conical block 5 upward. At this time, the rotating rod 4 loses its limit. Under the action of the tension spring 7, the tension spring 7 is pulled into the insertion tube 10, thereby disengaging from the docking lock groove 12 in the optical cable tube 13.

[0033] As an example of this utility model, a baffle 3 is fixedly provided on the movable end surface of the cylinder 1, and a spring 2 is sleeved on the upper end of the baffle 3 on the outer side of the cylinder 1. During the hoisting process, even if the cylinder 1 fails, the spring 2 will push the conical block 5 downward, thereby preventing the rotating rod 4 from rotating and disengaging from the docking lock groove 1, and ensuring that the hoisting cylinder 11 and the optical cable cylinder 13 will not fall off.

[0034] As an example of this utility model, the hoisting cylinder 11 is connected to the hoisting cable, and the optical cable cylinder 13 is connected to the logging cable.

[0035] Working principle: When in use, connect the optical cable drum 13 to the logging cable, then lift the hoisting drum 11 with the hoisting cable, so that the insertion drum 10 is aligned with the opening of the optical cable drum 13; insert the insertion drum 10 into the optical cable drum 13. At this time, the outer wall of the insertion drum 10 is adapted to the inner wall of the optical cable drum 13, ensuring that the insertion drum 10 can smoothly enter the optical cable drum 13.

[0036] When the insertion cylinder 10 is fully inserted into the optical cable cylinder 13, the cylinder 1 starts to work, and its movable end extends downward, driving the baffle 3 to move downward. When the baffle 3 moves downward, the baffle 3 pushes the conical block 5 to move downward. When the conical block 5 moves downward, its hypotenuse is pressed against the hypotenuse of the triangular block 6, and the rotating rod 4 begins to rotate outward. When the rotating rod 4 rotates outward, the docking latch 9 at its end passes through the through hole 14 and gradually approaches the docking lock groove 12 inside the optical cable cylinder 13. Finally, the docking latch 9 is engaged in the docking lock groove 12, realizing a firm connection between the hoisting cylinder 11 and the optical cable cylinder 13.

[0037] During the hoisting process, even if the cylinder 1 fails, the spring 2 will push the cone block 5 downward, thereby preventing the rotating rod 4 from rotating and disengaging from the docking lock groove 1, ensuring that the hoisting cylinder 11 and the optical cable cylinder 13 will not fall off.

[0038] When released, the cylinder 1 contracts and drives the conical block 5 upward. At this time, the rotating rod 4 loses its limit and is pulled into the insertion cylinder 10 by the tension spring 7, thus disengaging from the docking lock groove 12 in the optical cable cylinder 13.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hook for preventing the fiber optic logging tool from falling off, comprising a lifting cylinder (11) and an optical cable cylinder (13), characterized in that: An insertion cylinder (10) is fixedly provided at the lower end of the hoisting cylinder (11). The insertion cylinder (10) is adapted to the inside of the optical cable cylinder (13). Several rotating rods (4) are rotatably provided inside the insertion cylinder (10). A docking lock (9) is fixedly provided at one end of the rotating rod (4). A docking lock groove (12) adapted to the docking lock (9) is provided inside the optical cable cylinder (13). The docking lock groove (12) is an annular groove.

2. The anti-detachment hook for downhole fiber optic logging tools according to claim 1, characterized in that: A cylinder (1) is fixedly installed at the upper end of the inside of the hoisting cylinder (11), and a conical block (5) is fixedly installed at one end of the cylinder (1).

3. The anti-detachment hook for downhole fiber optic logging tools according to claim 2, characterized in that: A triangular block (6) is fixedly provided on the inner surface of the rotating rod (4), and the hypotenuse of the triangular block (6) is fitted with the hypotenuse of the cone block (5).

4. The anti-detachment hook for downhole fiber optic logging tools according to claim 3, characterized in that: The surface of the insertion tube (10) is provided with several through holes (14), and the through holes (14) are correspondingly provided with the docking latch (9).

5. The anti-detachment hook for downhole fiber optic logging tools according to claim 4, characterized in that: The insertion tube (10) has a fixed rod (8) fixed at the bottom center, and a tension spring (7) is fixed on the surface of the fixed rod (8). One end of the tension spring (7) is fixedly connected to the rotating rod (4).

6. The anti-detachment hook for downhole fiber optic logging tools according to claim 5, characterized in that: A baffle (3) is fixedly provided on the movable end surface of the cylinder (1), and a spring (2) is sleeved on the upper end of the baffle (3) on the outer side of the cylinder (1).

7. The anti-detachment hook for downhole fiber optic logging tools according to claim 6, characterized in that: The hoisting cylinder (11) is connected to the hoisting cable, and the optical cable cylinder (13) is connected to the logging cable.

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