Logging optical fiber protection structure

Abstract

The utility model relates to the technical field of logging optical fiber protection, and discloses a logging optical fiber protection structure which comprises protection tubes, the protection tubes are sleeved on an optical fiber in a sliding mode, a plurality of protection tubes are sleeved on the optical fiber at equal intervals, and adjacent protection tubes are connected through an inner pressing sleeve, an outer pressing sleeve and a fixing structure. The inner pressing sleeve and the outer pressing sleeve are both made of elastic heat conduction metal materials, the inner pressing sleeve and the outer pressing sleeve are designed to be in an adapter sleeve shape, adjacent protection pipes are connected through the inner pressing sleeve and the outer pressing sleeve, meanwhile, a part in the inner pressing sleeve and a part in the outer pressing sleeve are made to make contact with optical fibers, after the optical fibers work to generate heat, the heat can be transmitted to the protection pipes, the inner pressing sleeve and the outer pressing sleeve, and therefore the optical fibers can be protected. And the inner pressing sleeve and the outer pressing sleeve are connected with the protective tube, and the inner pressing sleeve and the outer pressing sleeve with heat conduction performance are utilized to dissipate the heat to the outside, so that the problem that the heat cannot be dissipated due to the arrangement of the protective tube outside the optical fiber can be effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of well logging fiber optic protection technology, specifically a well logging fiber optic protection structure. Background Technology

[0002] Existing protective structures for logging fibers in high-corrosion and high-pressure environments employ the method of applying asphalt oil to the outer surface of the fiber for protection. However, this method has some drawbacks. For instance, applying asphalt oil to the outer surface of the fiber may affect the service life of the logging fiber under the high temperature, high pressure, and high corrosion conditions of offshore oil and gas wells, which in turn may affect the stability and durability of data signal transmission.

[0003] The existing Chinese patent CN 221811858U discloses a protective structure for logging optical fiber in high-corrosion and high-pressure environments. When the logging optical fiber is transmitting data signals, the heat-conducting pipe in this protective structure conducts heat away from the core and ground wire, thus preventing the core and ground wire from becoming too hot and affecting the transmission efficiency of the logging optical fiber.

[0004] However, heat pipes are placed in the inner layer of structures such as glass fiber, corrosion-resistant tubes, and tensile tubes. Although they can achieve the purpose of rapid heat conduction, they cannot dissipate heat quickly. Heat will still accumulate in the protective structure and optical fiber and cannot be dissipated. Summary of the Invention

[0005] The purpose of this invention is to provide a protective structure for logging fiber optic cables to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a logging fiber optic protection structure, including a protective tube, which is slidably sleeved on the optical fiber, and multiple protective tubes are equally spaced on the optical fiber, with adjacent protective tubes connected by an inner pressure sleeve, an outer pressure sleeve, and a fixing structure.

[0007] Both the inner and outer pressure sleeves are made of elastic thermally conductive metal. The inner and outer pressure sleeves are designed as locking sleeves. One end of the inner and outer pressure sleeves is pressed onto the protective tube, and the other end is fitted together. The fixing structure tightly presses the end of the inner and outer pressure sleeves that contacts the protective tube.

[0008] Furthermore, the protective tube is composed of a heat-conducting layer, an anti-corrosion layer, a fiberglass layer, and a tensile layer, with the heat-conducting layer located at the innermost layer, followed by the anti-corrosion layer, the fiberglass layer, and the tensile layer in sequence.

[0009] Furthermore, a soft heat-conducting sleeve is fixedly installed on the inner side of both the inner and outer pressure sleeves. The soft heat-conducting sleeve is pressed onto the optical fiber, and the outer walls of both the inner and outer pressure sleeves are provided with heat dissipation protrusions distributed at equal intervals.

[0010] Furthermore, the fixing structure includes a connecting plate, on which an upper clamping ring and a lower clamping ring are fixedly installed. Both the upper and lower clamping rings are made of elastic metal. The upper and lower clamping rings form a clamping sleeve that fits onto the inner and outer pressure sleeves. An external threaded block is fixedly provided at the end of the upper and lower clamping rings away from the connecting plate. The external threaded blocks on the upper and lower clamping rings are fixedly connected together by a connecting nut.

[0011] Furthermore, the outer layer of the protective tube is fitted with a wear-resistant insulating sleeve, and a connecting connector is connected to the wear-resistant insulating sleeve near the end of the optical fiber, the connecting connector being connected to the optical fiber.

[0012] Furthermore, the edges of the upper and lower clamping rings are provided with integrally formed extended pressure rings, which are pressed onto the wear-resistant insulating sleeve, and the inner surface of the extended pressure rings is a circular arc protrusion.

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

[0014] While connecting adjacent protective tubes through the inner and outer pressure sleeves, a portion of the inner and outer pressure sleeves also comes into contact with the optical fiber. When the optical fiber generates heat during operation, the heat is transferred to the protective tubes, inner and outer pressure sleeves, which in turn are connected to the protective tubes. The thermally conductive inner and outer pressure sleeves dissipate this heat to the outside, effectively avoiding the problem of heat not being able to dissipate due to the protective tubes placed outside the optical fiber.

[0015] Because the inner and outer pressure sleeves are fixed sleeves, after the protective tube is installed on the optical fiber, the inner and outer pressure sleeves are then placed on the joints of adjacent protective tubes. At this time, a fixing structure is used to fix the inner and outer pressure sleeves and the protective tubes to prevent the inner and outer pressure sleeves from falling off and to ensure that the protective tubes are in contact with the inner and outer pressure sleeves, so that the heat on the protective tubes can be transferred to the inner and outer pressure sleeves.

[0016] The soft heat-conducting sleeve is designed to prevent the inner and outer pressure sleeves from pressing directly onto the optical fiber and causing damage. At the same time, it allows the heat generated by the optical fiber to be transferred to the inner and outer pressure sleeves. The heat dissipation protrusions are designed to increase the surface area of ​​the inner and outer pressure sleeves, so that the heat on the inner and outer pressure sleeves can be dissipated more quickly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the inner pressure sleeve, outer pressure sleeve, optical fiber, and protective tube of this utility model (front sectional view).

[0019] Figure 3This is a structural schematic diagram of the inner pressure sleeve and outer pressure sleeve of this utility model (front sectional view).

[0020] Figure 4 This is a schematic diagram of the structure of the protective tube and wear-resistant insulating sleeve of this utility model;

[0021] Figure 5 This is a structural schematic diagram of the inner pressure sleeve, outer pressure sleeve, and fixing structure of this utility model, shown in an exploded view.

[0022] In the diagram: 1. Optical fiber; 2. Protective tube; 201. Thermal conductive layer; 202. Corrosion-resistant layer; 203. Fiberglass layer; 204. Tensile layer; 3. Wear-resistant insulating sleeve; 4. Connecting joint; 5. Inner pressure sleeve; 6. Outer pressure sleeve; 7. Fixing structure; 701. Connecting plate; 702. Upper clamping ring; 703. Lower clamping ring; 704. External threaded block; 705. Connecting nut; 8. Soft thermal conductive sleeve; 9. Heat dissipation protrusion; 10. Extension pressure ring. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a well logging fiber optic protection structure, including a protective tube 2, which is slidably sleeved on an optical fiber 1. Multiple protective tubes 2 are sleeved on the optical fiber 1 at equal intervals, and adjacent protective tubes 2 are connected by an inner pressure sleeve 5, an outer pressure sleeve 6, and a fixing structure 7.

[0025] Both the inner pressure sleeve 5 and the outer pressure sleeve 6 are made of elastic thermally conductive metal (nickel alloy). The inner pressure sleeve 5 and the outer pressure sleeve 6 are designed as locking sleeves. One end of the inner pressure sleeve 5 and the outer pressure sleeve 6 presses against the protective tube 2, and the other end is fitted together. The fixing structure 7 tightly presses down the end of the inner pressure sleeve 5 and the outer pressure sleeve 6 that contacts the protective tube 2. The protective tube 2 is used to protect the optical fiber 1, and its length is less than the length of the optical fiber 1. Multiple protective tubes 2 need to be installed on the optical fiber 1. While connecting adjacent protective tubes 2 through the inner pressure sleeve 5 and the outer pressure sleeve 6, a portion of the inner pressure sleeve 5 and the outer pressure sleeve 6 also contacts the optical fiber 1. When the optical fiber 1 generates heat during operation, the heat is transferred to the protective tube 2, the inner pressure sleeve 5, and the outer pressure sleeve 6. The inner pressure sleeve 5 and the outer pressure sleeve 6 are connected to the protective tube 2. The heat is dissipated to the outside by the inner pressure sleeve 5 and the outer pressure sleeve 6, which have thermal conductivity. This can effectively avoid the problem that the heat cannot be dissipated because the protective tube 2 is set outside the optical fiber 1. Since the inner pressure sleeve 5 and the outer pressure sleeve 6 are fixed sleeves, the inner pressure sleeve 5 and the outer pressure sleeve 6 can be put on the joint of the adjacent protective tube 2 after the protective tube 2 is put on the optical fiber 1. At this time, the inner pressure sleeve 5, the outer pressure sleeve 6 and the protective tube 2 are fixed by the fixing structure 7 to prevent the inner pressure sleeve 5 and the outer pressure sleeve 6 from falling off, and to ensure that the protective tube 2 is in contact with the inner pressure sleeve 5 and the outer pressure sleeve 6, so that the heat on the protective tube 2 can be transferred to the inner pressure sleeve 5 and the outer pressure sleeve 6.

[0026] The protective tube 2 consists of a heat-conducting layer 201, an anti-corrosion layer 202, a glass fiber layer 203, and a tensile layer 204. The heat-conducting layer 201 is located at the innermost layer, followed by the anti-corrosion layer 202, the glass fiber layer 203, and the tensile layer 204 in sequence. The heat-conducting layer 201 is set to transfer the heat generated by the optical fiber 1 during operation. The anti-corrosion layer 202 is set to improve the corrosion resistance of the protective tube 2. The glass fiber layer 203 and the tensile layer 204 are set to increase the compressive strength and tensile strength of the protective tube 2.

[0027] A soft thermally conductive sleeve 8 (thermal conductive silicone) is fixedly installed on the inner side of both the inner pressure sleeve 5 and the outer pressure sleeve 6. The soft thermally conductive sleeve 8 is pressed on the optical fiber 1. The outer walls of both the inner pressure sleeve 5 and the outer pressure sleeve 6 are provided with heat dissipation protrusions 9 distributed at equal intervals. The soft thermally conductive sleeve 8 is provided to prevent the inner pressure sleeve 5 and the outer pressure sleeve 6 from directly pressing on the optical fiber 1 and causing damage to the optical fiber 1. At the same time, it can also transfer the heat generated by the operation of the optical fiber 1 to the inner pressure sleeve 5 and the outer pressure sleeve 6. The heat dissipation protrusions 9 are provided to increase the outer surface area of ​​the inner pressure sleeve 5 and the outer pressure sleeve 6, so that the heat on the inner pressure sleeve 5 and the outer pressure sleeve 6 can be dissipated more quickly.

[0028] The fixing structure 7 includes a connecting plate 701, on which an upper clamping ring 702 and a lower clamping ring 703 are fixedly installed. Both the upper clamping ring 702 and the lower clamping ring 703 are made of elastic metal. The upper clamping ring 702 and the lower clamping ring 703 form a clamping sleeve that fits on the inner pressure sleeve 5 and the outer pressure sleeve 6. An external threaded block 704 is fixedly provided at the end of the upper clamping ring 702 and the lower clamping ring 703 away from the connecting plate 701. The external threaded blocks 704 on the upper clamping ring 702 and the lower clamping ring 703 are fixedly connected together by a connecting nut 705. By rotating the connecting nut 705, the two external threaded blocks 704 are pressed together, thereby driving the upper clamping ring 702 and the lower clamping ring 703 to move closer to each other, so that the upper clamping ring 702 and the lower clamping ring 703 tightly press the inner pressure sleeve 5 and the outer pressure sleeve 6 onto the protective tube 2.

[0029] The outer layer of the protective tube 2 is covered with a wear-resistant insulating sleeve 3. A connecting connector 4 is connected to the wear-resistant insulating sleeve 3 near the end of the optical fiber 1. The connecting connector 4 is connected to the optical fiber 1. The wear-resistant insulating sleeve 3 is used to protect the protective tube 2 and can further protect the optical fiber 1.

[0030] The upper clamping ring 702 and the lower clamping ring 703 are provided with integrally formed extension pressure rings 10. The extension pressure rings 10 are pressed onto the wear-resistant isolation sleeve 3. The inner side of the extension pressure rings 10 is a rounded protrusion. The extension pressure rings 10 tightly press the wear-resistant isolation sleeve 3 onto the protective tube 2, which can prevent the wear-resistant isolation sleeve 3 from falling off.

[0031] Working principle: In use, multiple protective tubes 2 are evenly spaced on the optical fiber 1 to cover it. Abrasion-resistant insulating sleeves 3 are then placed on the protective tubes 2. After installation, the spacing between adjacent protective tubes 2 is adjusted, and the gap is aligned. The inner pressure sleeve 5 and outer pressure sleeve 6 are then fitted onto the protective tubes 2, ensuring they simultaneously press against both the optical fiber 1 and the protective tubes 2. The upper clamping ring 702 and lower clamping ring 703 are then fitted onto the inner pressure sleeve 5 and outer pressure sleeve 6. The connecting nut 705 is rotated to press the two externally threaded blocks 704 together. This causes the upper clamping ring 702 and the lower clamping ring 703 to move closer together, so that the upper clamping ring 702 and the lower clamping ring 703 press the inner pressure sleeve 5 and the outer pressure sleeve 6 tightly onto the protective tube 2. At the same time, the extended pressure ring 10 presses the wear-resistant insulating sleeve 3 tightly onto the protective tube 2, thereby protecting the optical fiber 1. After the optical fiber 1 generates heat during operation, the heat will be transferred to the protective tube 2, the inner pressure sleeve 5, and the outer pressure sleeve 6. The inner pressure sleeve 5 and the outer pressure sleeve 6 are connected to the protective tube 2, and the heat is dissipated to the outside by using the thermally conductive inner pressure sleeve 5 and the outer pressure sleeve 6.

[0032] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A logging fiber optic protection structure, comprising a protective tube (2), characterized in that: The protective tube (2) is slidably sleeved on the optical fiber (1), and multiple protective tubes (2) are sleeved on the optical fiber (1) at equal intervals. Adjacent protective tubes (2) are connected by an inner pressure sleeve (5), an outer pressure sleeve (6), and a fixing structure (7). The inner pressure sleeve (5) and the outer pressure sleeve (6) are both made of elastic thermally conductive metal. The inner pressure sleeve (5) and the outer pressure sleeve (6) are designed as a fixed sleeve. One end of the inner pressure sleeve (5) and the outer pressure sleeve (6) are pressed on the protective tube (2), and the other end is fitted together. The fixing structure (7) tightly presses the end of the inner pressure sleeve (5) and the outer pressure sleeve (6) that is in contact with the protective tube (2).

2. The logging fiber optic protection structure according to claim 1, characterized in that: The protective tube (2) is composed of a heat-conducting layer (201), an anti-corrosion layer (202), a glass fiber layer (203), and a tensile layer (204). The heat-conducting layer (201) is located in the innermost layer, followed by the anti-corrosion layer (202), the glass fiber layer (203), and the tensile layer (204) in sequence.

3. The logging fiber optic protection structure according to claim 1, characterized in that: The inner pressure sleeve (5) and the outer pressure sleeve (6) are both fixedly installed with soft heat-conducting sleeves (8). The soft heat-conducting sleeves (8) are pressed on the optical fiber (1). The outer walls of the inner pressure sleeve (5) and the outer pressure sleeve (6) are provided with heat dissipation protrusions (9) distributed at equal intervals.

4. The logging fiber optic protection structure according to claim 1, characterized in that: The fixed structure (7) includes a connecting plate (701), on which an upper clamping ring (702) and a lower clamping ring (703) are fixedly installed. The upper clamping ring (702) and the lower clamping ring (703) are both made of elastic metal. The upper clamping ring (702) and the lower clamping ring (703) form a compression sleeve that fits on the inner pressure sleeve (5) and the outer pressure sleeve (6). An external threaded block (704) is fixedly provided at the end of the upper clamping ring (702) and the lower clamping ring (703) away from the connecting plate (701). The external threaded blocks (704) on the upper clamping ring (702) and the lower clamping ring (703) are fixedly connected together by a connecting nut (705).

5. The logging fiber optic protection structure according to claim 1, characterized in that: The outer layer of the protective tube (2) is covered with a wear-resistant insulating sleeve (3), and a connecting connector (4) is connected to the wear-resistant insulating sleeve (3) near the end of the optical fiber (1). The connecting connector (4) is connected to the optical fiber (1).

6. The logging fiber optic protection structure according to claim 4, characterized in that: The upper clamping ring (702) and the lower clamping ring (703) are provided with integrally formed extended pressure rings (10) on their edges. The extended pressure rings (10) are pressed onto the wear-resistant insulating sleeve (3). The inner surface of the extended pressure rings (10) is a circular arc protrusion.

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