Underground armored oil balance wire harness device

Abstract

The invention discloses an underground armored oil balance wire harness device, and relates to the field of wire harness protection equipment of logging instruments. The underground armored oil balance wire harness device comprises a wire pipe assembly, the wire pipe assembly comprises a flexible wire pipe and an armored layer, and the flexible wire pipe is sleeved with the armored layer so that the wire pipe assembly can deform; the connecting assembly is arranged at one end of the line pipe assembly, the connecting assembly is used for being connected with the measuring module, and the other end of the line pipe assembly is used for being connected with the instrument body; and the flexible line pipe and the connecting assembly are filled with the oil liquid. The pipeline through which the wire harness passes is designed to be a flexible and elastic pipeline, the wire harness is isolated from slurry under the condition that the protection strength of the pipeline is ensured through the armor layer, the pressure of the external slurry on the pipeline is balanced through oil balance pressure bearing, normal work of the wire harness device in a high-temperature and high-pressure environment is protected, and the service life of the wire harness device is prolonged. Therefore, the wire harness device can improve the protectiveness of the wire harness of the logging instrument under high temperature and high pressure for the logging instrument with the requirements of pushing or contacting with mud.

Description

Technical Field

[0001] The present invention relates to the field of logging instrument harness protection equipment, and particularly relates to a downhole armored oil-balanced harness device. Background Art

[0002] During the process of lowering the logging instrument into the drilled wellbore, the mud pressure and temperature borne by the logging instrument will increase significantly with the increase in depth. The index requirements for the instrument performance in the special environment reach up to 260°C and 210 Mpa (high temperature and high pressure).

[0003] For logging instruments that do not require pushing or do not require contact with mud, their electronic components and harnesses are placed inside a special steel cylinder with pressure-bearing capacity, so that the harness is not affected by the downhole temperature and pressure. However, for instruments that require pushing (pressing the measurement module of the instrument against the wellbore wall through a pusher) or require contact with mud, such as micro-resistivity scanning imager, density meter, acoustic wave instruments, etc., the harnesses in these instruments cannot be protected by pressure-bearing through a special steel cylinder, so the wiring problem of such instruments under high temperature and high pressure in mud must be solved.

[0004] Currently, for acoustic wave instruments that require the transducer to indirectly contact mud, the internal component modules and harnesses of its receiving probe and transmitting probe are immersed in silicone oil as a whole, and the outside is wrapped with a fluororubber bladder to balance the external mud pressure. However, this method is greatly affected by the gas content in the wellbore, and the strength of the bladder is very limited; For density instruments, wiring is used to connect the upper and lower ends of the instrument inside a fixed thin steel pipe, and silicone oil is filled inside to balance the mud pressure. This method solves the problem of high temperature and high pressure, but the fixed thin steel pipe lacks flexibility and cannot deform freely on a large scale, so it cannot be pushed; For micro-resistivity scanning imagers, the bare wire immersion method is adopted. Multiple single-core pressure-bearing sealing plugs are used at the connection points at both ends of the harness, and a rubber sleeve is combined for pressure-bearing sealing and insulation treatment. Most of the remaining harness is immersed in mud, and only the outer skin of the cable itself is used as an insulating material. The problems of this method are: First, the insulating filler inside the rubber sleeve at both ends of the harness dissolves under high temperature and high pressure, and the insulation will fail. Second, the unprotected bare harness is very easy to be damaged, and the insulation of the cable outer skin fails under high temperature and high pressure, both of which cause the instrument to malfunction. Summary of the Invention

[0005] Aiming at the defects existing in the prior art, the technical problem solved by the present invention is: how to improve the protection of the harness of logging instruments that require pushing or contact with mud under high temperature and high pressure.

[0006] To achieve the above object, the downhole armored oil-balanced harness device provided by the present invention includes: A wire tube assembly, which includes a flexible wire tube and an armor layer. The armor layer is sleeved on the flexible wire tube to enable the wire tube assembly to be deformed; A connection assembly, which is arranged at one end of the wire tube assembly, and the connection assembly is used to connect with a measurement module. The other end of the wire tube assembly is used to connect with the instrument body, so as to realize that the wire harness of the instrument body is electrically connected with the measurement module through the flexible wire tube and the connection assembly; An oil fluid, which is filled inside the flexible wire tube and the connection assembly.

[0007] By adopting the above technical solution, the pipeline through which the wire harness passes is designed as a pipeline with flexible elasticity. While ensuring the protection strength of the pipeline through the armor layer, the wire harness is also isolated from the mud. The wire harness is led out from the instrument body, passes through the wire tube assembly and the connection assembly, and finally introduced into the measurement module, so as to supply power to the measurement module and transmit and receive signals. Since the inside of the wire tube assembly and the connection assembly are both filled with oil fluid, when the external temperature and pressure are getting higher and higher, the oil fluid heats up and causes the volume to expand, making the internal pressure of the pipeline gradually rise. Therefore, the oil body space is reduced by the oil balance pressure-bearing method to balance the pressure of the external mud on the pipeline. Therefore, the wire harness device is protected by the oil balance pressure-bearing to work normally in a high-temperature and high-pressure environment. Therefore, the wire harness device improves the protection of the wire harness under high temperature and high pressure for logging instruments with requirements for pushing or contacting mud.

[0008] In an embodiment, an oil balance assembly is arranged at the end of the wire tube assembly away from the connection assembly. The inside of the oil balance assembly is filled with oil fluid to realize the adjustment of the pressure of the oil fluid through the oil balance assembly, and the oil balance assembly is connected with the instrument body.

[0009] By adopting the above technical solution, the oil pressure inside the wire harness device can be adjusted to avoid damage to the wire harness or abnormal operation caused by too high or too low pressure; at the same time, the wire tube assembly and the instrument body can be connected through the oil balance assembly.

[0010] In an embodiment, the oil balance assembly includes an oil balance housing, a pressure regulator, a first wire routing pipeline and a first oil inlet pipeline; An installation groove is formed on one side of the oil balance housing. A first pressure-bearing connector is fixed inside the installation groove. The needle of the first pressure-bearing connector is used to connect with the instrument body, and the wire routing groove of the first pressure-bearing connector is used to fix the wire harness. An annular pipeline is arranged between the first pressure-bearing connector and the inner wall of the installation groove, and the annular pipeline is arranged on the first pressure-bearing connector; A first wire routing pipeline is formed at one end of the oil balance housing. One end of the first wire routing pipeline is communicated with the annular pipeline, and the other end is communicated with the flexible wire tube; A number of first oil inlet pipelines are formed on the oil balance housing. One end of the first oil inlet pipeline is communicated with the annular pipeline, and the other end is used to connect with an oil transfer pump; The pressure regulator is disposed inside the oil balance housing, and the pressure regulator is communicated with the annular pipeline; The interiors of the pressure regulator, the first wiring pipeline, the first oil inlet pipeline and the annular pipeline are all filled with oil.

[0011] By adopting the above technical solution, the designs of the installation groove and the annular pipeline can not only connect the pressure regulator, the first wiring pipeline and the first oil inlet pipeline, so that the routes of the oil and the wire harness are designed according to requirements; at the same time, a first pressure-bearing connector is designed inside the installation groove, which can not only connect the oil balance assembly with the instrument body, but also fix the wire harness on the first pressure-bearing connector after the wire harness is introduced into the measurement module, so as to improve the routing stability of the wire harness inside the wire harness device.

[0012] In an embodiment, the pressure regulator includes a plurality of oil compensation cavities and an adjusting member. The oil compensation cavities are opened inside the oil balance housing. One end of the oil compensation cavity is communicated with the annular pipeline, and the other end of the oil compensation cavity is opened at the end of the oil balance housing; The adjusting member is disposed inside the oil compensation cavity. The oil compensation cavity is divided into a first space and a second space by the adjusting member. Among them, the first space is located between the adjusting member and the annular pipeline, and the second space is located between the adjusting member and the end face of the oil balance housing, so as to realize adjusting the volume of the first space through the adjusting member.

[0013] By adopting the above technical solution, an oil compensation space is designed for the wire harness device. When the oil pressure inside the wire harness device is too high, the volume of the first space is increased to increase the total volume of the oil placement space, thereby reducing the oil pressure. When the oil pressure inside the wire harness device is too low, the volume of the first space is reduced to reduce the total volume of the oil placement space, thereby increasing the oil pressure.

[0014] In an embodiment, the adjusting member is a piston, and the piston is movably disposed on the inner wall of the oil compensation cavity.

[0015] By adopting the above technical solution, the movement of the piston can realize the change of the volume of the first space.

[0016] In an embodiment, the adjusting member is a relief valve. The relief valve includes a piston, a setscrew, a spring-back assembly and a valve ball. The piston is movably disposed on the inner wall of the oil compensation cavity. A placement groove is formed in the piston along its moving direction. The placement groove includes a moving groove and a clamping groove. The setscrew is fixed inside the moving groove. The spring-back assembly is disposed inside the moving groove, and a hole is formed in the setscrew to enable the external mud to enter the inside of the moving groove through the hole. One end of the spring-back assembly abuts against the setscrew, and the other end of the spring-back assembly abuts against the valve ball to realize the clamping and separation of the valve ball and the clamping groove.

[0017] By adopting the above technical solution, when the piston moves to the end of the oil compensation cavity due to the oil pressure, that is, when the volume of the second space is zero, the pressure inside the wire harness device is still rising. However, at this time, the first space cannot continue to increase. Therefore, when the pressure difference between the oil pressure and the mud pressure exceeds the threshold value, the oil pressure further compresses the rebound assembly, so that the valve ball is separated from the clamping groove, and the oil can be discharged through the overflow valve, thereby reducing the oil pressure until the pressure difference between the oil pressure and the mud pressure does not exceed the threshold value, thus further improving the pressure regulating ability of the pressure regulator.

[0018] In one embodiment, an external thread is provided on the outer wall of the setscrew, and an internal thread is provided on the inner wall of the moving groove. The setscrew is threadedly connected to the moving groove to enable the setscrew to move along the opening direction of the moving groove.

[0019] By adopting the above technical solution, the position of the setscrew in the moving groove can be adjusted by screwing the setscrew, so as to adjust the compression degree of the rebound assembly, and thus adjust the threshold value.

[0020] In one embodiment, a mud scraping ring and a sealing ring are provided between the piston and the inner wall of the oil compensation cavity. The mud scraping ring is sleeved on the piston, and the sealing ring is sleeved on the piston.

[0021] By adopting the above technical solution, the mud will enter the second space. To prevent the mud from entering the first space, when the piston moves, the mud on the inner wall of the oil compensation cavity is scraped off by the mud scraping ring. At the same time, the sealing performance between the piston and the inner wall of the oil compensation cavity is improved by the sealing ring, so as to further prevent the mud from entering the first space.

[0022] In one embodiment, one end of the wire tube assembly is connected to the oil balance assembly through a sealing connector; The other end of the wire tube assembly is connected to the connection assembly through a sealing connector; The sealing connector includes a sealing sleeve, a sealing plug and a sealing ring. The sealing sleeve is clamped with the sealing plug, and the sealing ring is arranged between the sealing sleeve and the sealing plug.

[0023] By adopting the above technical solution, the sealing performance at the connection between the wire tube assembly and the oil balance assembly is improved, and the sealing performance at the connection between the wire tube assembly and the connection assembly is also improved.

[0024] In one embodiment, the connection assembly includes a connection housing, a second wire routing pipeline and a second oil inlet pipeline. The second wire routing pipeline penetrates through both ends of the connection housing. A number of second oil inlet pipelines are provided on the connection housing. One end of the second oil inlet pipeline is communicated with the second wire routing pipeline, and the other end of the second oil inlet pipeline is used for connecting with an oil transfer pump; A connector is provided at the end of the second wire routing pipeline far from the wire tube assembly. The connector includes a female hole connector and a second pressure-bearing connector. The female hole connector is docked with the second pressure-bearing connector to electrically connect the connection housing with the measurement module.

[0025] By adopting the above technical solution, the first oil inlet pipeline and the second oil inlet pipeline can also be connected to the inlet and outlet of the oil transfer pump at the same time to carry out vacuum cycle oil injection, so as to discharge the air in the internal cavity of the wire harness device to the greatest extent. At the same time, after the wire harness is introduced into the second wire routing pipeline, the wire harness is fixed on the female hole connector to improve the wire routing stability of the wire harness inside the wire harness device. The designs of the female hole connector and the second pressure-bearing connector can electrically connect the connection component with the measurement module and also facilitate the disassembly and assembly of the measurement module.

[0026] In summary, the present invention includes at least one of the following beneficial technical effects: 1. By designing the pipeline through which the wire harness passes as a pipeline with flexible elasticity, while ensuring the protection strength of the pipeline through the armored layer, the wire harness is also isolated from the mud. The wire harness is led out from the instrument body, passes through the wire pipe assembly and the connection assembly, and finally introduced into the measurement module to supply power to and transmit and receive signals for the measurement module. Since the wire pipe assembly and the connection assembly are both filled with oil, when the external temperature and pressure increase, the oil heats up and expands in volume, causing the internal pressure of the pipeline to gradually rise. Therefore, the oil balance pressure-bearing method is used to increase the oil volume space to reduce the pressure, so as to balance the pressure of the external mud on the pipeline. Therefore, the wire harness device is protected by the oil balance pressure-bearing to work normally in a high-temperature and high-pressure environment. Therefore, the wire harness device improves the protection of the wire harness under high temperature and high pressure for well logging instruments with requirements for pushing or contacting mud. 2. By designing an oil balance assembly between the wire pipe assembly and the instrument body, the installation groove and the annular pipeline of the oil balance assembly can not only connect the pressure regulator, the first wire routing pipeline and the first oil inlet pipeline, so that the routes of the oil and the wire harness are designed according to requirements. At the same time, a first pressure-bearing connector is designed inside the installation groove, which can not only connect the oil balance assembly with the instrument body, but also fix the wire harness on the first pressure-bearing connector after the wire harness is introduced into the measurement module to improve the wire routing stability of the wire harness inside the wire harness device. 3. Through the design of the oil compensation space, it is avoided that the oil pressure inside the wire harness device is too large or too small, which may damage the wire harness device and cause the wire harness to malfunction. At the same time, the overflow valve design of the adjusting part further improves the pressure regulating ability of the pressure regulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the downhole armored oil balance wire harness device according to an embodiment of the present invention; Figure 2 For Figure 1 exploded view; Figure 3 It is a perspective view of the oil balance assembly according to an embodiment of the present invention; Figure 4This is an exploded view of the overflow valve according to the embodiment of the present invention.

[0028] In the figure: 1 - wire tube assembly, 2 - connection assembly, 21 - connection housing, 22 - second oil injection screw, 23 - second oil inlet pipeline, 24 - female hole connector, 25 - second pressure-bearing connector, 3 - measurement module, 4 - oil balance assembly, 41 - oil balance housing, 42 - first oil injection screw, 43 - first oil inlet pipeline, 44 - piston, 45 - overflow valve, 451 - placement groove, 4511 - moving groove, 4512 - clamping groove, 452 - mud scraping ring, 453 - sealing ring, 454 - set screw, 455 - spring-back assembly, 456 - valve ball, 46 - annular pipeline, 47 - first wire routing pipeline, 48 - first pressure-bearing connector, 481 - needle, 482 - wire routing groove, 49 - oil compensation cavity. Detailed implementation manners

[0029] The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] The downhole armored oil balance wire harness device in the embodiment of the present invention, as shown in Figure 1 the figure, the downhole armored oil balance wire harness device includes a wire tube assembly 1, which includes a flexible wire tube and an armored layer. The armored layer is sleeved on the flexible wire tube. The material of the flexible wire tube is selected as polytetrafluoroethylene. The armored layer can be a metal mesh structure or a wear-resistant material with compressive strength such as a nylon mesh, so as to enable the wire tube assembly 1 to be deformed; a connection assembly 2, which is arranged at one end of the wire tube assembly 1, and the connection assembly 2 is used to connect with the measurement module 3. The other end of the wire tube assembly 1 is used to connect with the instrument body, so as to realize the electrical connection between the wire harness of the instrument body and the measurement module 3 through the flexible wire tube and the connection assembly 2; oil, which is filled inside the flexible wire tube and the connection assembly 2. The oil can be an insulating liquid such as hydraulic oil or silicone oil.

[0031] It can be seen from this that the present invention designs the pipeline through which the wire harness passes as a pipeline with flexible elasticity. While ensuring the protection strength of the pipeline through the armored layer, the wire harness is also isolated from the mud. The wire harness is led out from the instrument main body, passes through the wire pipe assembly 1 and the connection assembly 2, and finally is introduced into the measurement module 3 to supply power to the measurement module 3 and transmit and receive signals. Since the inside of the wire pipe assembly 1 and the connection assembly 2 are both filled with oil. When the measurement instrument gradually descends, the external temperature and pressure become larger and larger. The oil heats up and expands in volume, causing the internal pressure of the pipeline to gradually rise. Therefore, the oil body space is reduced by the oil balance pressure-bearing method to balance the pressure of the external mud on the pipeline. Therefore, the wire harness device is protected by the oil balance pressure-bearing method to work normally in a high-temperature and high-pressure environment; when the measurement instrument gradually rises, the external temperature and pressure become smaller and smaller. According to the principle of thermal expansion and contraction of the oil, the volume of the oil shrinks. The oil body space is increased by the oil balance pressure-bearing method to resist the pressure of the external mud on the pipeline. Therefore, this wire harness device improves the protection of its wire harness under high temperature and high pressure for logging instruments that require pushing or contacting the mud.

[0032] Preferably, as shown in Figure 1 、 2 , one end of the wire pipe assembly 1 far from the connection assembly 2 is provided with an oil balance assembly 4. The inside of the oil balance assembly 4 is filled with oil to realize the adjustment of the pressure of the oil through the oil balance assembly 4, and the oil balance assembly 4 is connected to the instrument main body.

[0033] Specifically, one end of the wire pipe assembly 1 far from the connection assembly 2 is connected to the instrument main body through the designed oil balance assembly 4. The oil balance assembly 4 can not only adjust the oil pressure inside the wire harness device to avoid bursting or collapsing the wire harness device due to excessive or too small pressure, and the mud will enter the inside of the wire harness device, resulting in damage to the wire harness or abnormal operation; moreover, the oil balance assembly 4 is provided with structures for connecting to the wire pipe assembly 1 and the instrument main body respectively.

[0034] Furthermore, as shown in Figure 2 、 3 , a specific structure of the oil balance assembly 4 is provided: The oil balance assembly 4 includes an oil balance housing 41, a pressure regulator, a first wire routing pipeline 47 and a first oil inlet pipeline 43; An installation groove is opened on one side of the oil balance housing 41. A first pressure-bearing connector 48 is fixed inside the installation groove. The needle 481 of the first pressure-bearing connector 48 is used to connect to the instrument main body. The wire routing groove 482 of the first pressure-bearing connector 48 is used to fix the wire harness. An annular pipeline 46 is arranged between the first pressure-bearing connector 48 and the inner wall of the installation groove. The annular pipeline 46 is arranged on the first pressure-bearing connector 48; One end of the oil balance housing 41 is provided with a first wire routing pipeline 47. One end of the first wire routing pipeline 47 is communicated with the annular pipeline 46, and the other end thereof is communicated with a flexible wire pipe; A plurality of first oil inlet pipelines 43 are provided on the oil balance housing 41. One end of the first oil inlet pipeline 43 is communicated with the annular pipeline 46, and the other end thereof is used for communicating with an oil transfer pump; The pressure regulator is arranged inside the oil balance housing 41 and is communicated with the annular pipeline 46; The inside of the pressure regulator, the first wire routing pipeline 47, the first oil inlet pipeline 43 and the annular pipeline 46 are all filled with oil.

[0035] Specifically, a cylindrical installation groove is provided on the bottom surface of the oil balance housing 41. A first pressure-bearing connector 48 is fixedly installed inside the installation groove. The instrument body is placed at the bottom of the oil balance housing 41, and is docked and fixed with the instrument body through the needle 481 of the first pressure-bearing connector 48. A wire routing groove 482 for the wire harness to pass through is provided on the outer wall of the first pressure-bearing connector 48, so that the wire harness of the instrument body is introduced into the inside of the oil balance housing 41, and one end of the wire harness is fixed on the first pressure-bearing connector 48; The diameter of the first pressure-bearing connector 48 is smaller than the diameter of the installation groove. A sealing ring 453 is installed between the first pressure-bearing connector 48 and the inner wall of the installation groove to separate the space of the installation groove (the inside of the oil balance housing and the space of the instrument body). The sealing ring 453, the inner wall of the installation groove and the top surface of the installation groove form the annular pipeline 46, and the wire harness passes through the sealing ring 453; A first wire routing pipeline 47 is provided at one end of the oil balance housing 41 close to the wire pipe assembly 1. One end of the first wire routing pipeline 47 is communicated with the annular pipeline 46, and the other end thereof is communicated with a flexible wire pipe; One or more first oil inlet pipelines 43 are provided on the oil balance housing 41. One end of the first oil inlet pipeline 43 is communicated with the annular pipeline 46, and the other end thereof is used for communicating with an oil transfer pump. The oil input from the first oil inlet pipeline 43 will flow into the annular pipeline 46 and flow to other structures inside the wire harness device. When the oil does not need to be input, the port of the first oil inlet pipeline 43 can also be blocked by the first oil injection screw 42 to prevent the oil from flowing out of the port; A pressure regulator is arranged inside the oil balance housing 41, and the pressure regulator needs to be communicated with the annular pipeline 46 to adjust the oil pressure inside the wire harness device; The designs of the installation groove and the annular pipeline 46 can not only communicate the pressure regulator, the first wire routing pipeline 47 and the first oil inlet pipeline 43, so that the routes of the oil and the wire harness are designed according to requirements; At the same time, the first pressure-bearing connector 48 is designed inside the installation groove, which can not only connect the oil balance assembly 4 with the instrument body, but also fix the wire harness on the first pressure-bearing connector 48 after the wire harness is introduced into the measurement module 3, so as to improve the routing stability of the wire harness inside the wire harness device.

[0036] Preferably, refer toFigure 3 As shown in the figure, a specific structure of a voltage regulator is provided: The voltage regulator includes a number of oil compensation cavities 49 and adjusting members. The oil compensation cavities 49 are formed inside the oil balance housing 41. One end of the oil compensation cavity 49 communicates with the annular pipeline 46, and the other end of the oil compensation cavity 49 is opened at the end of the oil balance housing 41; The adjusting member is disposed inside the oil compensation cavity 49. The oil compensation cavity 49 is divided into a first space and a second space by the adjusting member. Among them, the first space is located between the adjusting member and the annular pipeline 46, and the second space is located between the adjusting member and the end face of the oil balance housing 41, so as to realize adjusting the volume of the first space through the adjusting member.

[0037] Specifically, one or more cylindrical oil compensation cavities 49 are formed inside the oil balance housing 41. The optimal solution is two to maximize the oil compensation space. One end of the oil compensation cavity 49 communicates with the annular pipeline 46, and the other end of the oil compensation cavity 49 is opened at the end of the oil balance housing 41 (the end far from the wire tube assembly 1); An adjusting member is disposed inside each oil compensation cavity 49. The oil compensation cavity 49 is divided into a first space and a second space by the adjusting member. Among them, the first space is located between the adjusting member and the annular pipeline 46, and the second space is located between the adjusting member and the end face of the oil balance housing 41. By adjusting the member to change the volume of the first space, when the oil pressure inside the wire harness device is too high, the volume of the first space is increased to increase the total volume of the oil placement space, thereby reducing the oil pressure. When the oil pressure inside the wire harness device is too low, the volume of the first space is reduced to reduce the total volume of the oil placement space, thereby increasing the oil pressure.

[0038] Further, referring to Figure 3 As shown in the figure, a specific structure of the first adjusting member is provided: The adjusting member is a piston 44, and the piston 44 is movably disposed on the inner wall of the oil compensation cavity 49.

[0039] Specifically, the cross-section of the piston 44 is circular, and the outer wall of the piston 44 fits with the inner wall of the oil compensation cavity 49. By moving the piston 44 inside the oil compensation cavity 49, the change in the volume of the first space is realized. When the pressure of the oil pressure is greater than the pressure of the slurry, the oil pressure pushes one end face of the piston 44, and the piston 44 moves towards the end of the oil balance housing 41 away from the wire tube assembly 1 to increase the volume of the first space; when the pressure of the oil pressure is less than the pressure of the slurry, the pressure of the slurry pushes the other end face of the piston 44, and the piston 44 moves closer to the annular pipeline 46 to reduce the volume of the first space.

[0040] Referring to Figure 3 As shown in the figure, a specific structure of the second adjusting member is provided: The adjusting member is an overflow valve 45. The overflow valve 45 includes a piston 44, a setscrew 454, a resilient component 455, and a valve ball 456. The piston 44 is movably arranged on the inner wall of the oil compensation cavity 49. A placement groove 451 is formed in the piston 44 along its moving direction. The placement groove 451 includes a moving groove 4511 and a clamping groove 4512. The setscrew 454 is fixed inside the moving groove 4511. The resilient component 455 is arranged inside the moving groove 4511. A hole is formed in the setscrew 454 to enable external mud to enter the inside of the moving groove 4511 through the hole. One end of the resilient component 455 abuts against the setscrew 454, and the other end of the resilient component 455 abuts against the valve ball 456 to realize the clamping and separation of the valve ball 456 and the clamping groove 4512.

[0041] Specifically, the adjusting member is an overflow valve 45. The overflow valve 45 includes a piston 44, a setscrew 454, a resilient component 455, and a valve ball 456. The cross-section of the piston 44 is circular. The outer wall of the piston 44 fits against the inner wall of the oil compensation cavity 49. A placement groove 451 runs through the piston 44 along its moving direction. The placement groove 451 can be divided into a moving groove 4511 and a clamping groove 4512. The setscrew 454 is fixedly installed inside the moving groove 4511, and the resilient component 455 and the valve ball 456 are placed inside the moving groove 4511. One end of the resilient component 455 abuts against the setscrew 454, and the other end of the resilient component 455 abuts against the valve ball 456. At this time, the resilient component 455 is in a compressed state. The resilient component 455 can be selected as a spring. Since the setscrew 454 is fixed, the valve ball 456 is pushed until a part of the valve ball 456 is stuck inside the clamping groove 4512, and the connection between the moving groove 4511 and the clamping groove 4512 is also closed. A hole runs through the setscrew 454 along the opening direction of the moving groove 4511, so that external mud can enter the inside of the moving groove 4511 through the hole. When the piston 44 moves to the end of the oil compensation cavity 49 due to oil pressure, that is, when the volume of the second space is zero, the pressure inside the wiring harness device is still rising, but at this time the first space cannot continue to increase. Therefore, when the pressure difference between the oil pressure and the mud pressure exceeds the threshold value, the oil pressure further compresses the resilient component 455, so that the valve ball 456 separates from the clamping groove 4512, and the oil can be discharged through the overflow valve 45, thereby reducing the oil pressure until the pressure difference between the oil pressure and the mud pressure does not exceed the threshold value, so that the valve ball 456 is clamped with the clamping groove 4512 and the oil no longer discharges; when the pressure of the mud is greater than the oil pressure, the mud entering the inside of the moving groove 4511 pushes the valve ball 456 to move closer to the annular pipeline 46. Since the valve ball 456 is clamped with the clamping groove 4512 at this time, the entire overflow valve 45 is driven to move closer to the annular pipeline 46 to reduce the volume of the first space. Therefore, the above design further improves the pressure regulating ability of the pressure regulator.

[0042] Furthermore, the outer wall of the setscrew 454 is provided with an external thread, and the inner wall of the moving groove 4511 is provided with an internal thread. The setscrew 454 is threadedly connected to the moving groove 4511 to enable the setscrew 454 to move along the opening direction of the moving groove 4511.

[0043] Specifically, the position of the setscrew 454 in the moving groove 4511 can be adjusted by screwing the setscrew 454, so as to adjust the compression degree of the elastic return component 455, thereby adjusting the threshold value; the threshold value can also be adjusted by replacing the model of the elastic return component 455.

[0044] Preferably, as shown in Figure 3 a scraping ring 452 and a sealing ring 453 are arranged between the inner wall of the piston 44 and the oil compensation cavity 49. The scraping ring 452 is sleeved on the piston 44, and the sealing ring 453 is sleeved on the piston 44. The positional relationship between the scraping ring 452 and the sealing ring 453 is that the scraping ring 452 is located on the side close to the second space, and the sealing ring 453 is located on the side close to the first space.

[0045] Specifically, mud will enter the second space. To prevent the mud from entering the first space, when the piston 44 moves, the mud on the inner wall of the oil compensation cavity 49 is scraped off by the scraping ring 452. At the same time, the sealing performance between the piston 44 and the inner wall of the oil compensation cavity 49 is improved by the sealing ring 453, thereby further preventing the mud from entering the first space.

[0046] Preferably, as shown in Figure 2 one end of the wire tube assembly 1 is connected to the oil balance assembly 4 through a sealing connector; the other end of the wire tube assembly 1 is connected to the connection assembly 2 through a sealing connector; The sealing connector includes a sealing gland, a sealing plug and a sealing ring 453. The sealing gland is snap-connected to the sealing plug, and the sealing ring 453 is arranged between the sealing gland and the sealing plug.

[0047] Specifically, the sealing performance at the connection between the wire tube assembly 1 and the oil balance assembly 4 is improved, and the sealing performance at the connection between the wire tube assembly 1 and the connection assembly 2 is also improved. There are four specific structures: Sealing glands are installed at both ends of the wire tube assembly 1, and sealing plugs are respectively installed at the ends of the oil balance assembly 4 and the connection assembly 2; Sealing plugs are installed at both ends of the wire tube assembly 1, and sealing glands are respectively installed at the ends of the oil balance assembly 4 and the connection assembly 2; A sealing gland is installed at one end of the wire tube assembly 1 close to the oil balance assembly 4, a sealing plug is installed at the end of the oil balance assembly 4, a sealing plug is installed at one end of the wire tube assembly 1 close to the connection assembly 2, and a sealing gland is installed at the end of the connection assembly 2; A sealing plug is installed at one end of the wire tube assembly 1 close to the oil balance assembly 4, a sealing bushing is installed at the end of the oil balance assembly 4, a sealing bushing is installed at one end of the wire tube assembly 1 close to the connection assembly 2, and a sealing plug is installed at the end of the connection assembly 2.

[0048] Preferably, referring to Figure 2 as shown, a specific structure of the connection assembly 2 is provided: The connection assembly 2 includes a connection housing 21, a second wire routing pipeline, and a second oil inlet pipeline 23. The second wire routing pipeline runs through both ends of the connection housing 21. A number of second oil inlet pipelines 23 are provided on the connection housing 21. One end of the second oil inlet pipeline 23 is communicated with the second wire routing pipeline, and the other end of the second oil inlet pipeline 23 is used to communicate with an oil transfer pump. When there is no need to input oil, the port of the second oil inlet pipeline 23 can also be blocked by a second oil injection screw 22 to prevent oil from flowing out of the port. A connector is provided at the end of the second wire routing pipeline away from the wire tube assembly 1. The connector includes a female hole connector 24 and a second pressure-bearing connector 25. The female hole connector 24 is docked with the second pressure-bearing connector 25. The female hole connector 24 is fixed to the end of the connection housing 21 close to the measurement module 3, and the second pressure-bearing connector 25 is fixed to the end of the measurement module 3 close to the connection housing 21. The wire routing groove of the female hole connector 24 is used to fix the wire harness to realize the connection between the connection housing 21 and the measurement module 3.

[0049] Specifically, the first oil inlet pipeline 43 and the second oil inlet pipeline 23 can also be connected to the inlet and outlet of the oil transfer pump at the same time for vacuum circulating oil injection to discharge the air in the internal cavity of the wire harness device to the greatest extent. At the same time, after the wire harness is introduced into the second wire routing pipeline 23, the wire harness is fixed to the female hole connector 24 to improve the wire routing stability of the wire harness inside the wire harness device. The designs of the female hole connector 24 and the second pressure-bearing connector 25 can electrically connect the connection assembly with the measurement module and also facilitate the disassembly and assembly of the measurement module.

[0050] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A downhole armored oil balance harness device, characterized in that: It includes: A wire tube assembly (1) comprises a flexible wire tube and an armor layer, wherein the armor layer is sleeved on the flexible wire tube to enable the wire tube assembly (1) to be deformable; A connecting component (2) is arranged at one end of the wire tube component (1), and the connecting component (2) is used to connect to the measuring module (3), and the other end of the wire tube component (1) is used to connect to the instrument body, so that the wire harness of the instrument body is electrically connected to the measuring module (3) through the flexible wire tube and the connecting component (2); Oil fills the interior of the flexible conduit and the connecting assembly (2).

2. The downhole armored oil balance harness device according to claim 1, characterized in that: An oil balance component (4) is provided at one end of the wire tube component (1) away from the connection component (2); the interior of the oil balance component (4) is filled with oil so that the pressure of the oil can be adjusted by the oil balance component (4); and the oil balance component (4) is connected to the instrument body.

3. The downhole armored oil balance harness device according to claim 2, characterized in that: The oil balance assembly (4) comprises an oil balance housing (41), a pressure regulator, a first wiring pipeline (47) and a first oil inlet pipeline (43); A mounting groove is provided on one side of the oil balance housing (41), a first pressure-bearing connector (48) is fixed inside the mounting groove, a needle (481) of the first pressure-bearing connector (48) is used to connect to the instrument body, a wiring groove (482) of the first pressure-bearing connector (48) is used to be fixed to the wiring harness, an annular pipeline (46) is provided between the first pressure-bearing connector (48) and the inner wall of the mounting groove, and the annular pipeline (46) is provided on the first pressure-bearing connector (48); A first wiring pipeline (47) is provided at one end of the oil balance housing (41); one end of the first wiring pipeline (47) is in communication with the annular pipeline (46), and the other end of the first wiring pipeline (47) is in communication with the flexible wire pipe; A plurality of first oil inlet pipelines (43) are provided on the oil balance housing (41); one end of the first oil inlet pipeline (43) is connected to the annular pipeline (46), and the other end is used to communicate with the oil pump; The pressure regulator is arranged inside the oil balance housing (41), and the pressure regulator is communicated with the annular pipeline (46); The pressure regulator, the first wiring pipeline (47), the first oil inlet pipeline (43) and the annular pipeline (46) are all filled with oil.

4. The downhole armored oil balance harness device according to claim 3, characterized in that: The pressure regulator comprises a plurality of oil compensation chambers (49) and adjusting parts. The oil compensation chamber (49) is opened inside the oil balance housing (41). One end of the oil compensation chamber (49) is connected to the annular pipeline (46). The other end of the oil compensation chamber (49) is opened at the end of the oil balance housing (41). The adjusting member is arranged inside the oil compensation chamber (49), and the oil compensation chamber (49) is divided into a first space and a second space by the adjusting member, wherein the first space is located between the adjusting member and the annular pipeline (46), and the second space is located between the adjusting member and the end surface of the oil balance housing (41), so that the volume of the first space can be adjusted by the adjusting member.

5. The downhole armored oil balance harness device according to claim 4, characterized in that: The regulating member is a piston (44), and the piston (44) is movably arranged on the inner wall of the oil compensation cavity (49).

6. The downhole armored oil balance harness device according to claim 4, characterized in that: The regulating member is a relief valve (45), which comprises a piston (44), a top screw (454), a rebound assembly (455) and a valve ball (456). The piston (44) is movably arranged on the inner wall of the oil compensation cavity (49). A placement groove (451) is provided on the piston (44) along its moving direction. The placement groove (451) comprises a moving groove (4511) and a clamping groove (4512). The top screw (454) is fixed to the moving groove (4511). The movable groove (4511) is provided with a hole on the top screw (454) to enable external mud to enter the inside of the movable groove (4511) through the hole. The rebound component (455) is arranged inside the movable groove (4511), one end of the rebound component (455) abuts against the top screw (454), and the other end of the rebound component (455) abuts against the valve ball (456) to achieve the clamping connection and separation of the valve ball (456) and the clamping groove (4512).

7. The downhole armored oil balance harness device according to claim 6, characterized in that: The outer wall of the top screw (454) is provided with an external thread, the inner wall of the movable groove (4511) is provided with an internal thread, and the top screw (454) is threadably connected to the movable groove (4511) so that the top screw (454) can move along the opening direction of the movable groove (4511).

8. The downhole armored oil balance harness device according to claim 5 or 6, characterized in that: A scraper ring (452) and a sealing ring (453) are provided between the piston (44) and the inner wall of the oil compensation cavity (49); the scraper ring (452) is sleeved on the piston (44), and the sealing ring (453) is sleeved on the piston (44).

9. The downhole armored oil balance harness device according to claim 2, characterized in that: One end of the wire tube assembly (1) is connected to the oil balance assembly (4) via a sealing connector; The other end of the wire tube assembly (1) is connected to the connection assembly (2) via a sealing connection piece; The sealing connection piece comprises a sealing pressing sleeve, a sealing plug and a sealing ring (453); the sealing pressing sleeve is clamped with the sealing plug, and the sealing ring (453) is arranged between the sealing pressing sleeve and the sealing plug.

10. The downhole armored oil balance harness device according to claim 1, characterized in that: The connection assembly (2) comprises a connection housing (21), a second wiring pipeline and a second oil inlet pipeline (23), the second wiring pipeline being arranged at both ends of the connection housing (21), a plurality of second oil inlet pipelines (23) being provided on the connection housing (21), one end of the second oil inlet pipeline (23) being in communication with the second wiring pipeline, and the other end of the second oil inlet pipeline (23) being used to be in communication with an oil pump; a connector is provided at one end of the second wiring pipeline away from the line pipe assembly (1), the connector comprising a female connector (24) and a second pressure-bearing connector (25), the female connector (24) being butted with the second pressure-bearing connector (25) to achieve electrical connection between the connection housing (21) and the measurement module (3).

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