An isolation device for a downhole signal line

Abstract

The utility model relates to the technical fields of pipeline detection, specifically relates to an isolation device of underground signal line, including the pressure shell of cover is established in signal line, the bottom of pressure shell is open, first baffle and second baffle are arranged in the inner chamber of pressure shell, to form the heat preservation space, the air space of blocking and the accommodation space with the pressure shell separation. Through cover setting pressure shell in the top of signal line joint, the top of the accommodation space of this pressure shell is provided with heat preservation space and air space of blocking. And heat preservation space can insulate the temperature of surface, to ensure that the temperature of signal line is not influenced by outside. Moreover, setting air space of blocking can insulate gas, and then prevent when the heat preservation layer in heat preservation space is burnt by fire, effectively prevent the spread of fire. Ensure that signal line joint has independent detection space environment, and then make signal line collection effect accurate, further ensure the precision of detection main part.

Description

Technical Field

[0001] This utility model relates to the technical field of pipeline inspection, and in particular to an isolation device for downhole signal lines. Background Technology

[0002] Existing pipeline leak detection systems offer a method for detecting multiple leak points that can be installed at intervals along a pipeline. The detection method involves placing a detection unit between pipeline sections, with signal lines connected to the unit. These signal lines collect pipeline signals to detect the pressure of liquids passing through nearby pipes and transmit this information to the detection unit. The detection unit then sends the data to a control room for real-time monitoring. Once a leak is detected, the detection unit sends an alarm to the control room, enabling precise identification of the leak point.

[0003] The existing signal lines are directly exposed to the outside world and in contact with the ground surface. During detection, they are easily affected by the ground environment, which in turn affects the signal acquisition effect of the signal lines and leads to inaccurate detection by the detection subject. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an isolation device for downhole signal lines, which solves the technical problem that existing signal lines are directly exposed to the outside world and in contact with the ground surface, making them easily affected by the ground environment during detection, thus affecting the signal acquisition effect of the signal lines and causing inaccurate detection by the detection subject.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model provides an isolation device for a downhole signal line, including a pressure shell covering the signal line. The bottom of the pressure shell is open, and a first partition plate and a second partition plate are provided in the inner cavity of the pressure shell to divide the pressure shell into an insulation space, an air-blocking space, and an accommodating space.

[0009] Optionally, the insulation space is provided with a first insulation layer, a second insulation layer and a third insulation layer from top to bottom.

[0010] Optionally, the thickness ratio of the first insulation layer, the second insulation layer, and the third insulation layer is 2:1:1.5.

[0011] Optionally, a miniature air pump is connected to the outside of the blocked air space.

[0012] Optionally, the second partition includes two fireproof boards and a PET film disposed between the two fireproof boards.

[0013] Optionally, it may also include a water-absorbing layer disposed below the fireproof board.

[0014] Optionally, it also includes an anti-wear washer disposed on the bottom annular end face of the pressure housing.

[0015] (III) Beneficial Effects

[0016] The beneficial effects of this utility model are:

[0017] This invention provides an isolation device for downhole signal lines. A pressure shell is installed on top of the signal line connector, and the top of this pressure shell contains an insulation space and an air-blocking space. The insulation space insulates against surface temperatures, ensuring the signal line's temperature is unaffected by external factors. Furthermore, the air-blocking space isolates gases, effectively preventing the spread of fire if the insulation layer within the insulation space catches fire. This ensures the signal line connector has an independent detection environment, resulting in accurate signal acquisition and further enhancing the accuracy of the detection system. This invention solves the technical problem of existing signal lines being directly exposed to the outside environment and in contact with the surface, making them susceptible to surface environmental influences during detection, thus affecting signal acquisition and leading to inaccurate detection. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the isolation device for downhole signal lines in this utility model (the detection body is not shown).

[0019] Figure 2 for Figure 1 A cross-sectional structural diagram of the isolation device for downhole signal lines;

[0020] Figure 3 for Figure 2 A schematic diagram of the bottom part of the structure;

[0021] Figure 4 for Figure 2 A schematic diagram of the structure of the second partition plate.

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Pressure shell; 2. First partition plate; 3. Second partition plate; 31. Fireproof board; 32. PET film; 4. Insulated space; 41. First insulation layer; 42. Second insulation layer; 43. Third insulation layer; 5. Air-blocking space; 6. Retaining space; 7. Miniature air pump; 8. Water-absorbing layer;

[0024] 100. Install the flange;

[0025] 200. Detection subject;

[0026] 300. Signal cable connector; 301. Signal connection panel;

[0027] 400, Second Bolt. Detailed Implementation

[0028] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figures 1-4 As shown, an isolation device for a downhole signal line includes a pressure housing 1 covering the signal line. The bottom of the pressure housing 1 is open. A first partition plate 2 and a second partition plate 3 are provided in the inner cavity of the pressure housing 1 to divide the pressure housing 1 into an insulation space 4, an air-blocking space 5, and a containment space 6.

[0030] An isolation device for downhole signal lines includes a pressure housing 1 covering the top of the signal line connector 300. The pressure housing 1 has an insulated space 4 and an air-blocking space 5 at its top. The insulated space 4 isolates the signal line from the surface temperature, ensuring the signal line temperature is unaffected by external factors. Furthermore, the air-blocking space 5 isolates gases, effectively preventing the spread of fire if the insulation layer within the insulated space 4 is ignited. This ensures the signal line connector 300 has an independent detection environment, resulting in accurate signal acquisition and further ensuring the accuracy of the detection unit 200. This solves the technical problem of existing signal lines being directly exposed to the outside environment and in contact with the surface, making them susceptible to surface environmental influences during detection, thus affecting signal acquisition and leading to inaccurate detection by the detection unit 200.

[0031] Furthermore, the insulated space 4 is provided with a first insulation layer 41, a second insulation layer 42, and a third insulation layer 43 from top to bottom. Insulation is effectively achieved by using the third insulation layer. The first insulation layer 41 is rock wool, the second insulation layer 42 is glass wool, and the third insulation layer 43 is a polyurethane foam layer.

[0032] Furthermore, the thickness ratio of the first insulation layer 41, the second insulation layer 42, and the third insulation layer 43 is 2:1:1.5. This ratio ensures the insulation effect and heat insulation of the insulation layers.

[0033] Furthermore, a miniature air pump 7 is provided to block the external connection of the air space 5. The specific model of this miniature air pump 7 is PC3025N.

[0034] Furthermore, the second partition 3 includes two layers of fireproof boards 31 and a PET film 32 disposed between the two layers of fireproof boards 31. This effectively prevents the spread of fire. When the top fireproof board 31 catches fire, the PET film 32 isolates the fire source.

[0035] Furthermore, it also includes a water-absorbing layer 8, which is disposed below the fireproof board 31 to prevent water leakage from the signal line connector 300.

[0036] Furthermore, it also includes an anti-wear washer disposed on the bottom annular end face of the pressure housing 1. This improves the wear resistance of the end of the pressure housing 1, thereby ensuring the service life of the pressure housing 1.

[0037] In this embodiment, a signal line through hole is also provided on the end face of the mounting flange 100. The top of the signal line through hole forms a signal line connection end face along its radial direction. Multiple signal line screw holes are provided on the signal line connection end face. The signal line screw holes are distributed circumferentially. A signal connection plate 301 is provided on the signal line connector 300. Multiple second mounting screw holes are provided on the signal connection plate 301. The second mounting screw holes correspond to the signal line screw holes.

[0038] It also includes a second bolt 400, which passes through the second mounting screw hole and the signal line screw hole respectively, and is screwed to both the second mounting screw hole and the signal line screw hole.

[0039] In this embodiment, the signal cable connector 300 is augmented with an annular signal connection disc 301 that abuts against the annular signal cable connection end face. Multiple connection points are spaced circumferentially from the annular signal connection disc 301 using a second bolt 400. This ensures a more stable connection and better guarantees the installation effect of the signal cable connector 300. This further ensures the effectiveness of signal cable and pipeline detection and improves detection accuracy.

[0040] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An isolation device for downhole signal lines, characterized in that: The pressure housing (1) is covered on the signal line. The bottom of the pressure housing (1) is open. A first partition plate (2) and a second partition plate (3) are provided in the inner cavity of the pressure housing (1) to divide the pressure housing (1) into a heat preservation space (4), an air blocking space (5) and a containment space (6).

2. The isolation device for downhole signal lines according to claim 1, characterized in that: The insulated space (4) is provided with a first insulation layer (41), a second insulation layer (42) and a third insulation layer (43) from top to bottom.

3. The isolation device for downhole signal lines according to claim 2, characterized in that: The thickness ratio of the first insulation layer (41), the second insulation layer (42) and the third insulation layer (43) is 2:1:1.

5.

4. The isolation device for downhole signal lines according to claim 1, characterized in that: The external connection of the blocked air space (5) is a micro air pump (7).

5. The isolation device for downhole signal lines according to claim 1, characterized in that: The second partition (3) includes two fireproof boards (31) and a PET film (32) disposed between the two fireproof boards (31).

6. The isolation device for downhole signal lines according to claim 5, characterized in that: It also includes a water-absorbing layer (8), which is disposed below the fireproof board (31).

7. The isolation device for downhole signal lines according to claim 1, characterized in that: It also includes an anti-wear washer disposed on the bottom annular end face of the pressure housing (1).

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