Oil well temperature and pressure measuring device

Abstract

The present application relates to the field of oil well detection technology, and specifically to an oil well temperature and pressure measuring device, including: a main body, a pressure sensing module, a power supply module and a control unit; the main body is cylindrical, and the main body is used to move in the oil well; the pressure sensing module, the power supply module and the control unit are all arranged in the side wall of the main body, and the pressure sensing module and the control unit, as well as the power supply module and the control unit are electrically connected through leads in the side wall of the main body; the control unit has a temperature sensing module, an acquisition control module and a data storage module, and during the movement of the main body in the oil well, the acquisition control module is used to control the single acquisition time of the pressure sensing module and the temperature sensing module, and the data storage module is used to store the acquisition data of the pressure sensing module and the temperature sensing module. Through the above method, the present application can accurately obtain the temperature and pressure distribution at the wellbore in the oil well, and ensure the reliability of subsequent cementing.

Description

Technical Field

[0001] The present application relates to the technical field of oil well detection, and in particular to an oil well temperature and pressure measuring device. Background Art

[0002] Whether on land or offshore, the well depth for liner cementing is generally large, and the wellbore to be cemented has temperature and pressure changes in the extension direction of the oil well.

[0003] Due to technical limitations, the existing pressure distribution and temperature distribution in the wellbore of an oil well are generally predicted using numerical simulation methods. However, due to the difference between the numerical simulation method and the actual temperature and pressure in the wellbore, it is difficult to ensure the reliability of subsequent cementing. Summary of the invention

[0004] In view of the above problems, the present application provides an oil well temperature and pressure measuring device, which can accurately obtain the temperature and pressure distribution at the wellbore in the oil well to ensure the reliability of subsequent cementing.

[0005] The present application provides an oil well temperature and pressure measuring device, comprising: a main body, a pressure sensing module, a power supply module and a control unit; the main body is cylindrical and is used to move in the oil well; the pressure sensing module, the power supply module and the control unit are all arranged in the side wall of the main body, and the pressure sensing module and the control unit, as well as the power supply module and the control unit are all electrically connected through leads in the side wall of the main body; the control unit has a temperature sensing module, a collection control module and a data storage module, and during the movement of the main body in the oil well, the collection control module is used to control the single collection time of the pressure sensing module and the temperature sensing module, and the data storage module is used to store the collection data of the pressure sensing module and the temperature sensing module.

[0006] The oil well temperature and pressure measuring device provided by the present application sets the main body in a cylindrical shape so that the main body can move smoothly in the oil well, so as to accurately measure the temperature and pressure conditions at the wellbore in the oil well, and in the process of the main body entering the oil well and moving deeply, the single collection time of the pressure sensing module and the temperature sensing module is controlled by the collection control module to realize the collection of the temperature and pressure distribution conditions in the oil well, and the collected temperature and pressure data are stored by the data storage module, so that the technicians can read the pressure distribution parameters in the oil well after the collection is completed, thereby providing a theoretical basis for the later cementing slurry system and formula design, so as to ensure the stability and reliability of the later cementing, and the oil well temperature and pressure measuring device has low production cost, which is conducive to popularization and use.

[0007] In an optional manner, the pressure sensing module is arranged at one end of the main control unit along the axial direction of the main body, and a cover plate sealingly covering the pressure sensing module and the main control unit is arranged on the main body, and a through hole is arranged on the cover plate at a position opposite to the pressure sensing module, and the through hole is used for the fluid in the oil well to pass through, so that the pressure sensing module can detect the pressure of the fluid. By arranging the pressure sensing module at one end of the control unit along the axial direction of the main body, the cover plate can simultaneously seal and cover the pressure sensing module and the control unit, so as to fully ensure the sealing of the surrounding environment of the pressure sensing module and the control unit, and by arranging a through hole on the cover plate at a position opposite to the pressure sensing module, the fluid in the oil well can flow into the through hole, so as to realize the pressure sensing module to detect the fluid pressure. Compared with the manner of arranging the detection probe of the pressure sensing module protruding from the side wall of the main body, the pressure sensing module can be effectively protected, and the detection probe can be prevented from being damaged by friction due to the detection probe of the pressure sensing module protruding from the side wall of the main body when the main body moves in the oil well.

[0008] In an optional manner, a plurality of connection holes are provided at intervals along the axial direction of the main body on the edges of both sides of the cover plate, and the connection holes are used to be fixedly connected to the main body through threaded connectors, and grooves are provided between adjacent connection holes on the edges of both sides of the cover plate. In order to prevent the threaded connectors connecting the cover plate and the main body from breaking out due to excessive force when the main body is bent and deformed, grooves are provided between adjacent connection holes on the edges of both sides of the cover plate, so that the rigidity between adjacent connection holes on the cover plate is reduced, so that the cover plate is easy to bend and deform with the main body, thereby reducing the force on the threaded connectors and ensuring the stability of the connection between the cover plate and the main body.

[0009] In an optional manner, the pressure sensing module has a strain gauge arranged opposite to the through hole, and a protective layer is arranged on the surface of the strain gauge, and the protective layer is used to improve the wear resistance, corrosion resistance and fatigue damage resistance of the strain gauge. By arranging the protective layer on the surface of the strain gauge of the pressure sensing module, the strain gauge is protected, thereby improving the wear resistance, corrosion resistance and fatigue damage resistance of the strain gauge and increasing the service life of the pressure sensing module.

[0010] In an optional manner, the protective layer includes a nano-plating. In nano-electroplating, the dispersion strengthening effect of nanoparticles can improve the hardness of the plating, strengthen the firm adhesion of wear-resistant nanoparticles, and improve the wear resistance, self-lubricating properties, and self-healing properties of the nanoparticles themselves, thereby making the surface molecules of the strain gauge electroplated with the nano-plating more dense. The thickness of the nano-plating is generally only half of that of the traditional plating, but it can greatly improve the wear resistance, corrosion resistance, and fatigue damage resistance of the strain gauge, and can also improve the brightness and smoothness of the strain gauge surface.

[0011] In an optional manner, an electrical connector is further provided in the side wall of the main body, the electrical connector is located between the power supply module and the control unit, and the electrical connector electrically connects the lead of the power supply module with the lead of the control unit. By providing the electrical connector in the side wall of the main body between the power supply module and the control unit, the power supply module and the control unit can be conveniently electrically connected or the circuit can be disconnected, thereby realizing the switch control of the control unit.

[0012] In an optional manner, a mounting groove is provided on the side wall of the main body, a joint bracket is provided at the bottom of the mounting groove, the electrical joint is fixed on the joint bracket, and a pressure cap is provided on the slot cover of the mounting groove, and the pressure cap presses the electrical joint. By providing a joint bracket at the bottom of the mounting groove and fixing the electrical joint on the joint bracket, the installation and fixation of the electrical joint is achieved, and by providing a pressure cap on the slot cover of the mounting groove to press the electrical joint, the electrical joint cannot move in the mounting groove, ensuring that the structure of the electrical joint is stable and reliable, and will not shake due to the vibration of the oil well temperature and pressure measuring device, thereby providing protection for the temperature and pressure measurement work.

[0013] In an optional manner, the electrical connector includes a first connector and a second connector, the first connector is fixed to the connector bracket by a clamping member, the inner wall of the gland is provided with a clamping member, and the second connector is fixed to the clamping member, so that when the gland is covered in the installation slot, the second connector is plugged into the first connector, and when the gland is removed from the installation slot, the second connector is pulled out from the first connector. By clamping and fixing the first connector to the connector bracket and fixing the second connector to the gland, when the gland is covered in the installation slot, the second connector is plugged into the first connector, so that the power supply module and the control unit are electrically connected, and the oil well temperature and pressure measuring device can work normally. When the gland is taken out of the installation slot, the second connector is pulled out from the first connector along with the gland, the circuit between the power supply module and the control unit is disconnected, and the control unit stops working, which makes the operation of the control unit switch control more convenient.

[0014] In an optional manner, a clamping groove is provided on the inner side wall of the installation groove, the edge of the gland abuts against the inner wall of the installation groove located within the clamping groove, and the end of the gland facing away from the bottom of the installation groove is clamped and fixed to the clamping groove by a retaining ring. By providing a clamping groove on the inner side wall of the installation groove, and clamping the retaining ring in the clamping groove and pressing the gland against the inner side of the retaining ring, the gland can be stably fixed in the installation groove, and the retaining ring is easy to disassemble and assemble, so that the gland can be conveniently disassembled and assembled on the installation groove, and if the retaining ring is damaged during disassembly and assembly, the retaining ring can be directly replaced, and the cost of replacing the retaining ring is lower than replacing the entire gland.

[0015] In an optional manner, a step portion is provided at the notch of the installation slot, the gland abuts against the step portion, and a seal is provided between the two inner walls of the step portion that are angled to each other and the gland. By providing a step portion at the notch of the installation slot and abutting the gland against the step portion, the depth of the gland pressed into the installation slot is limited, and excessive compression between the first joint and the second joint is prevented from causing damage due to excessive insertion of the gland. At the same time, by providing a seal between the two inner walls of the step portion that are angled to each other and the gland, the assembly gap between the gland and the installation slot is effectively sealed, thereby ensuring the stability of the internal electrical joint.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0018] Figure 1 A schematic diagram of the structure of an oil well temperature and pressure measuring device provided in an embodiment of the present application;

[0019] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction;

[0020] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction;

[0021] Figure 4 A schematic diagram of the structure of a cover plate in an oil well temperature and pressure measuring device provided in an embodiment of the present application;

[0022] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the CC direction;

[0023] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure along the DD direction;

[0024] Figure 7 for Figure 3 A schematic diagram of the local enlarged structure at E;

[0025] Figure 8A schematic diagram of the structure of a joint bracket in an oil well temperature and pressure measuring device provided in an embodiment of the present application.

[0026] The reference numerals in the specific implementation manner are as follows:

[0027] Oil well temperature and pressure measuring device 100, main body 110, pressure sensing module 120, strain gauge 121, nano-plating layer 122, power supply module 130, control unit 140, temperature sensing module 141, acquisition control module 142, data storage module 143, wiring channel 150, cover 160, through hole 161, first sealing ring 162, second sealing ring 163, connecting hole 164, groove 165, electrical connector 170, first connector 171, terminal 1711, pressing member 1712, second connector 172, mounting groove 173, card slot 1731, step portion 1732, seal 1733, first annular groove 1734, connector bracket 174, positioning hole 1741, cavity 1742, pressure cover 175, card connector 1751, retaining ring 1752, second annular groove 1753. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0030] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0031] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0034] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0035] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0036] Whether on land or offshore, the well depth of liner cementing is generally large, and the wellbore to be cemented has temperature and pressure changes in the extension direction of the oil well. Limited by technical conditions, the existing pressure distribution and temperature distribution in the wellbore generally adopt numerical simulation methods, by proposing a mathematical model of temperature and pressure distribution in the wellbore and performing computer simulation calculations, the distribution of temperature and pressure parameters in the wellbore can be predicted.

[0037] Since the actual temperature and pressure conditions in the wellbore are complex and changeable, there is a certain difference between the temperature and pressure parameter distribution in the wellbore obtained by the numerical simulation method and the actual temperature and pressure parameter distribution. If the temperature and pressure parameter distribution obtained by the numerical simulation method is used as the parameter basis for subsequent cementing, it is difficult to ensure the reliability of subsequent cementing. If the temperature and pressure parameters obtained by the numerical simulation method are much smaller than the actual temperature and pressure parameters, it is easy to cause the cementing cement to be destroyed in the later stage, resulting in cementing failure.

[0038] Based on this, in order to accurately grasp the temperature and pressure distribution at the wellbore in the oil well, the present application proposes an oil well temperature and pressure measuring device, which sets the main body in a cylindrical shape so that the main body can move smoothly in the oil well, so as to accurately measure the temperature and pressure conditions at the wellbore in the oil well, and in the process of the main body entering the oil well and moving deeply, the single acquisition time of the pressure sensing module and the temperature sensing module is controlled by the acquisition control module to realize the acquisition of the temperature and pressure distribution in the oil well, and the collected temperature and pressure data are stored by the data storage module, so that the technicians can read the pressure distribution parameters in the oil well after the acquisition is completed, thereby providing a theoretical basis for the later cementing slurry system and formula design, so as to ensure the stability and reliability of the later cementing.

[0039] The present application provides an oil well temperature and pressure measuring device. Figure 1 and Figure 2 , Figure 1 FIG. 4 shows a side view of an oil well temperature and pressure measuring device 100 provided in an embodiment. Figure 2 It is shown in Figure 1 The cross-sectional structure in the AA direction. As shown in the figure, the oil well temperature and pressure measuring device 100 includes: a main body 110, a pressure sensing module 120, a power supply module 130 and a control unit 140. The main body 110 is cylindrical, and the main body 110 is used to move in the oil well. The pressure sensing module 120, the power supply module 130 and the control unit 140 are all arranged in the side wall of the main body 110, and the pressure sensing module 120 and the control unit 140, as well as the power supply module 130 and the control unit 140 are electrically connected through the wiring channel 150 in the side wall of the main body 110. The control unit 140 has a temperature sensing module 141, an acquisition control module 142 and a data storage module 143. When the main body 110 moves in the oil well, the acquisition control module 142 is used to control the single acquisition duration and the interval between two consecutive acquisitions of the pressure sensing module 120 and the temperature sensing module 141, and the data storage module 143 is used to store the acquisition data of the pressure sensing module 120 and the temperature sensing module 141.

[0040] The main body 110 may be configured as follows Figure 2The hollow cylindrical shape shown in the figure enables the fluid in the oil well to flow along the outer periphery of the main body 110 and the cavity in the middle of the main body 110 during the movement of the main body 110 in the oil well, thereby reducing the fluid resistance of the main body 110 relative to the fluid when the main body 110 moves in the oil well, and facilitating the flexible movement of the main body 110. In order to ensure the structural strength of the main body 110 when it is placed in the oil well, the main body 110 can be made of metal or alloy material with good pressure resistance, and the pressure resistance of the main body 110 generally needs to reach 120Mpa to ensure that the high-pressure fluid in the oil well will not destroy the structural strength of the main body 110.

[0041] The pressure sensing module 120 uses a pressure sensor for pressure detection. When performing pressure detection, the pressure sensor needs to contact the fluid outside the main body 110. Therefore, the probe used by the pressure sensor for detection is set to protrude from the side wall of the main body 110, or a fluid introduction hole is set at the position corresponding to the side wall of the main body 110 and the pressure sensor probe, so that the fluid in the oil well can enter the fluid introduction hole and contact the pressure sensor probe to detect the fluid pressure. Considering that the maximum pressure threshold of the fluid in the oil well generally does not exceed 100Mpa, the range of the pressure sensor can be set to 0~100Mpa (±0.2%Mpa) to ensure accurate and reliable measurement of the pressure of the fluid in the oil well, and avoid the pressure of the fluid exceeding the measurement range of the pressure sensor and affecting the accuracy of the detection of the pressure distribution in the oil well.

[0042] The temperature sensing module 141, the acquisition control module 142 and the data storage module 143 can be integrated on the circuit board of the control unit. The temperature sensing module 141 uses a temperature sensor. According to the heat transfer principle, the temperature of the side wall of the main body 110 can be detected by the temperature sensor to detect the temperature of the fluid outside the main body 110, and the radial distance between the outer wall of the main body 110 and the temperature sensor should not be too large to avoid affecting the accuracy of temperature measurement due to the long heat transfer time. Similarly, considering that the maximum temperature threshold of the fluid in the oil well generally does not exceed 175°C, the range of the temperature sensor can be set to 0-175°C (±0.2°C) to ensure accurate measurement of the temperature of the fluid in the oil well.

[0043] Considering the problem of electrical connection sealing between the pressure sensing module 120, the power supply module 130 and the control unit 140, the pressure sensing module 120, the power supply module 130 and the control unit 140 are electrically connected through leads in the side wall of the main body 110. For details, please continue to refer to Figure 2 , and further combined with Figure 3 , Figure 3 It is shown in Figure 1Cross-sectional structure in the BB direction. As shown in the figure, a wiring channel 150 is provided in the side wall of the main body 110 located between the pressure sensing module 120 and the control unit 140 and between the power supply module 130 and the control unit 140. The wiring channel 150 is used for routing the lead wires, thereby realizing the electrical connection between the control unit 140 and the pressure sensing module 120 and the power supply module 130, and ensuring the normal operation of the temperature and pressure measurement circuit.

[0044] In a specific application scenario, the acquisition control module 142 can control the single acquisition duration of the pressure sensing module 120 and the temperature sensing module 141 to be less than or equal to 0.5s, for example, the single acquisition duration can be 0.2s, 0.25s, 0.3s, 0.5s, etc., so that the pressure sensing module 120 and the temperature sensing module 141 can collect 2-5 data within 1s and store the collected data through the data storage module 143. In order to avoid overloading the data storage module 143 due to excessive amount of stored data, in a preferred manner, the pressure sensing module 120 and the temperature sensing module 141 can automatically calculate the average value of multiple temperature and pressure data collected in 1s, and then store the average value in the data storage module 143, reducing the amount of data storage, so as to facilitate the subsequent reading of the temperature and pressure distribution of the oil well.

[0045] In addition, when the oil well temperature and pressure measuring device 100 enters the oil well and moves to perform measurements, the moving distance or depth of the oil well temperature and pressure measuring device 100 in the oil well within a preset time can be obtained by controlling and obtaining the moving speed of the oil well temperature and pressure measuring device 100 in the oil well, and then the temperature and pressure distribution in the depth direction of the oil well can be obtained in combination with the temperature and pressure data collected by the oil well temperature and pressure measuring device 100 in the preset time. For example, by obtaining the moving distance or depth of the oil well temperature and pressure measuring device 100 in the oil well within 1 second, combined with the average value of the temperature and pressure data read by the oil well temperature and pressure measuring device 100 within 1 second, a temperature and pressure distribution table in the depth direction of the oil well can be generated, so that the temperature and pressure distribution in the oil well can be more intuitively obtained.

[0046] The oil well temperature and pressure measuring device 100 provided in the present application sets the main body 110 in a cylindrical shape so that the main body 110 can be smoothly moved in the oil well, so as to accurately measure the temperature and pressure conditions at the wellbore in the oil well. In the process of the main body 110 entering the oil well and moving deeply, the single collection time of the pressure sensing module 120 and the temperature sensing module 141 is controlled by the collection control module 142 to realize the collection of the temperature and pressure distribution in the oil well. The collected temperature and pressure data are stored by the data storage module 143, so that the technicians can read the pressure distribution parameters in the oil well after the collection is completed, thereby providing a theoretical basis for the later cementing slurry system and formula design to ensure the stability and reliability of the later cementing. In addition, the oil well temperature and pressure measuring device 100 has low production cost and is conducive to popularization and use.

[0047] Regarding the installation structure of the pressure sensing module 120 on the main body 110, the present application further proposes an implementation method. Figure 2 The pressure sensing module 120 is disposed on the control unit 140 along the axial direction of the main body 110 ( Figure 2 At one end thereof (in the direction indicated by the X-axis), a cover plate 160 is provided on the main body 110 for sealingly covering the pressure sensing module 120 and the control unit 140. A through hole 161 is provided on the cover plate 160 at a position opposite to the pressure sensing module 120. The through hole 161 is used for allowing the fluid in the oil well to pass through so that the pressure sensing module 120 can detect the pressure of the fluid.

[0048] Please continue reading Figure 2 As shown in the figure, a first sealing ring 162 can be clamped between the cover plate 160 and the main body 110 along the outer periphery of the pressure sensing module 120, and a second sealing ring 163 can be clamped along the outer periphery of the control unit 140 to ensure the sealing of the outer periphery of the pressure sensing module 120 and the control unit 140 when the cover plate 160 is fixed on the main body 110 and covers the pressure sensing module 120 and the control unit 140.

[0049] By setting the pressure sensing module 120 at one end of the control unit 140 along the axial direction of the main body 110, the cover plate 160 can seal and cover the pressure sensing module 120 and the control unit 140 at the same time, so as to fully ensure the sealing of the surrounding environment of the pressure sensing module 120 and the control unit 140, and by setting a through hole 161 at a position opposite to the pressure sensing module 120 on the cover plate 160, the fluid in the oil well can flow into the through hole 161, so as to realize the detection of the fluid pressure by the pressure sensing module 120. Compared with the method of setting the detection probe of the pressure sensing module 120 protruding from the side wall of the main body 110, the module of the pressure sensing module 120 can be effectively protected, so as to avoid friction damage of the detection probe of the pressure sensing module 120 caused by the detection probe of the pressure sensing module 120 protruding from the side wall of the main body 110 when the main body 110 moves in the oil well.

[0050] It is understandable that the power supply module 130 can also be installed in the side wall of the main body 110 and then sealed by a cover plate to form a closed space, thereby providing a reliable working environment for the power supply module 130.

[0051] Regarding the structure of the cover plate 160, the present application further proposes an implementation method. Figures 4 to 6 , Figure 4 The structure of the outer side of the cover plate 160 is shown in FIG. Figure 5 Shows Figure 4 The cross-sectional structure along the CC direction, Figure 6 Shows Figure 4 Cross-sectional structure along DD direction. As shown in the figure, a plurality of connection holes 164 are provided at intervals along the axial direction of the main body 110 on the edges on both sides of the cover plate 160, and the connection holes 164 are used to be fixedly connected to the main body 110 through threaded connectors, and grooves 165 are provided between adjacent connection holes 164 on the edges on both sides of the cover plate 160.

[0052] Since the space in the oil well is not straight up and down, and some parts are curved, the oil well temperature and pressure measuring device 100 often bends and deforms when moving in the oil well so as to smoothly pass through the curved space in the oil well. Based on this, in order to prevent the threaded connector connecting the cover plate 160 and the main body 110 from collapsing due to excessive force when the main body 110 is bent and deformed, grooves 165 are provided between adjacent connecting holes 164 on the edges of both sides of the cover plate 160, so that the rigidity between adjacent connecting holes 164 on the cover plate 160 is reduced, so that the cover plate 160 is convenient to bend and deform with the main body 110, thereby reducing the force on the threaded connector and ensuring the stability of the connection between the cover plate 160 and the main body 110.

[0053] In order to improve the working life of the pressure sensing module 120, the present application further proposes an implementation method. Figure 2The pressure sensing module 120 has a strain gauge 121 arranged opposite to the through hole 161. A protective layer is arranged on the surface of the strain gauge 121, and the protective layer is used to improve the wear resistance, corrosion resistance and fatigue damage resistance of the strain gauge.

[0054] Specifically, the protective layer may adopt a protective layer structure of plastic material plus aluminum foil, or may adopt a protective layer structure of silica gel, resin, asphalt, etc.

[0055] Considering that there are various waste solids and liquids in the fluid in the oil well, if these waste solids and liquids are in contact with the strain gauge 121 on the pressure sensing module 120 for a long time, the strain gauge 121 will be worn, corroded, fatigued, etc., which will affect the service life. Based on this, by setting a protective layer on the surface of the strain gauge 121 of the pressure sensing module 120, the strain gauge 121 is protected, thereby improving the wear resistance, corrosion resistance and fatigue resistance of the strain gauge 121, and increasing the service life of the pressure sensing module 120.

[0056] Furthermore, in order to fully improve the performance of the strain gauge 121, the present application further proposes an implementation method, which is described in detail in detail in Figure 2 , the protective layer includes a nano-plating layer 122 .

[0057] In nano-electroplating, the dispersion strengthening effect of nanoparticles can improve the hardness of the coating, strengthen the firm adhesion of wear-resistant nanoparticles, and improve the wear resistance, self-lubricating properties, and self-healing properties of the nanoparticles themselves, thereby making the surface molecules of the strain gauge 121 electroplated with the nano-coating 122 more dense. The thickness of the nano-coating 122 is generally only half of that of the traditional coating, but it can greatly improve the wear resistance, corrosion resistance and fatigue damage resistance of the strain gauge 121, and can also improve the brightness and smoothness of the surface of the strain gauge 121.

[0058] In order to quickly establish electrical connection between the power supply module 130 and the control unit 140, the present application further proposes an implementation method. Figure 7 , the figure shows Figure 3 The local enlarged structure at E. As shown in the figure, an electrical connector 170 is also provided in the side wall of the main body 110 , and the electrical connector 170 is located between the power supply module 130 and the control unit 140 , and the electrical connector 170 electrically connects the lead wires of the power supply module 130 and the lead wires of the control unit 140 .

[0059] Specifically, the electrical connector 170 plays the role of a switch in the oil well temperature and pressure measuring device 100. The electrical connector 170 includes a first connector 171 and a second connector 172, wherein the first connector 171 is electrically connected to the lead of the power supply module 130, and the second connector 172 is electrically connected to the lead of the control unit 140. The control unit 140 is turned on by electrically plugging the first connector 171 and the second connector 172, and the control unit 140 is turned off by unplugging the first connector 171 and the second connector 172.

[0060] Taking into account that the power supply module 130 and the control unit 140 are electrically connected by routing inside the side wall of the main body 110, it is difficult to perform switch control. Based on this, an electrical connector 170 is provided between the power supply module 130 and the control unit 140 inside the side wall of the main body 110, so that the power supply module 130 and the control unit 140 can be conveniently electrically connected or the circuit can be disconnected, thereby realizing switch control of the control unit 140.

[0061] Considering that the oil well temperature and pressure measuring device 100 may vibrate when moving in the oil well and performing measurement operations, which may affect the stability of the circuit structure, the present application further proposes an implementation method. Figure 7 As shown in the figure, the side wall of the main body 110 is provided with a mounting groove 173, the bottom of the mounting groove 173 is provided with a connector bracket 174, the electrical connector 170 is fixed on the connector bracket 174, and the slot cover of the mounting groove 173 is provided with a pressure cover 175, which presses the electrical connector 170.

[0062] Please continue to participate Figure 7 , and further combined with Figure 8 , Figure 8 The three-dimensional structure of the connector bracket 174 in the oil well temperature and pressure measuring device 100 is shown in FIG. As shown in the figure, a positioning hole 1741 is provided on the connector bracket 174, and the positioning hole 1741 is used for inserting the first connector 171 for positioning. The bottom of the positioning hole 1741 has a cavity 1742, and the end of the first connector 171 facing the cavity 1742 has a wiring terminal 1711, and the cavity 1742 is used for routing the lead of the power supply module 130 and electrically connecting to the wiring terminal 1711. Similarly, the lead of the control unit 140 is electrically connected to the wiring terminal of the second connector 172 in the space between the gland 175 and the second connector 172.

[0063] By setting a connector bracket 174 at the bottom of the installation groove 173 and fixing the electrical connector 170 on the connector bracket 174, the installation and fixation of the electrical connector 170 is achieved, and by setting a pressure cover 175 on the slot cover of the installation groove 173 to press the electrical connector 170, the electrical connector 170 cannot move in the installation groove 173, ensuring that the structure of the electrical connector 170 is stable and reliable, and will not shake due to the vibration of the oil well temperature and pressure measuring device 100, thereby providing protection for the temperature and pressure measurement work.

[0064] In order to control the opening and closing of the circuit between the power supply module 130 and the control unit 140, the present application further proposes an implementation method. Figure 7 The electrical connector 170 includes a first connector 171 and a second connector 172. The first connector 171 is fixed to the connector bracket 174 by a clamping member 1712. The inner wall of the gland 175 is provided with a clamping member 1751. The second connector 172 is fixed to the clamping member 1751, so that when the gland 175 is covered in the installation groove 173, the second connector 172 is plugged into the first connector 171. When the gland 175 is removed from the installation groove 173, the second connector 172 is pulled out from the first connector 171.

[0065] Specifically, the clamping member 1712 can be fixed to the joint bracket 174 by screws, so that the first joint 171 is clamped and fixed to the joint bracket 174, and the second joint 172 can be clamped and fixed on the clamping member 1751, so that the second joint 172 moves with the pressure cover 175.

[0066] Considering the convenience of plugging and unplugging the second connector 172 to form an electrical connection with the first connector 171, the first connector 171 is pressed and fixed on the connector bracket 174, and the second connector 172 is fixed on the gland 175, so that when the gland 175 is covered in the installation groove 173, the second connector 172 is plugged with the first connector 171, so that the power supply module 130 and the control unit 140 are electrically connected, and the oil well temperature and pressure measuring device 100 can work normally. When the gland 175 is taken out from the installation groove 173, the second connector 172 is pulled out from the first connector 171 along with the gland 175, the circuit between the power supply module 130 and the control unit 140 is disconnected, and the control unit 140 stops working, which is more convenient for the switch control operation of the control unit 140.

[0067] In order to facilitate the disassembly and assembly of the gland 175 on the mounting groove 173, the present application further proposes an implementation method. Figure 7As shown in the figure, the inner side wall of the mounting groove 173 is provided with a card slot 1731, the edge of the pressure cover 175 abuts against the inner wall of the mounting groove 173 located within the card slot 1731, and the end of the pressure cover 175 away from the bottom of the mounting groove 173 is fixed to the card slot 1731 by a retaining ring 1752.

[0068] Considering that after the gland 175 is directly engaged with the mounting groove 173, it is difficult to remove the gland 175 from the mounting groove 173, so that the first joint 171 cannot be conveniently disconnected from the second joint 172. Based on this, the present embodiment sets a slot 1731 on the inner side wall of the mounting groove 173, and engages the retaining ring 1752 in the slot 1731 and the inner side of the retaining ring 1752 presses the gland 175, so that the gland 175 can be stably fixed in the mounting groove 173, and the retaining ring 1752 is easy to disassemble and assemble, so that the gland 175 can be conveniently disassembled and assembled on the mounting groove 173, and if the retaining ring 1752 is damaged during disassembly and assembly, the retaining ring 1752 can be directly replaced, and the cost of replacing the retaining ring 1752 is lower than replacing the entire gland 175.

[0069] In order to improve the sealing performance of the electrical connector 170 in the mounting groove 173, the present application further proposes an implementation method. Figure 7 As shown in the figure, a step portion 1732 is provided at the notch of the mounting groove 173 , the pressure cover 175 abuts against the step portion 1732 , and a sealing member 1733 is provided between the two inner walls of the step portion 1732 that are angled with each other and the pressure cover 175 .

[0070] Specifically, Figure 7 As shown in the figure, a first annular groove 1734 can be opened on the bottom wall of the step portion 1732, and a second annular groove 1753 can be opened on the side wall of the pressure cover 175, so that the seal 1733 can be fixed by the first annular groove 1734 and the second annular groove 1753. The seal 1733 can adopt a sealing ring and be fixed on the first annular groove 1734 and the second annular groove 1753. The seal 1733 can be interference clamped between the step portion 1732 and the pressure cover 175 to fully improve the sealing performance.

[0071] By setting a step portion 1732 at the notch of the installation groove 173 and abutting the pressure cover 175 against the step portion 1732, the depth of the pressure cover 175 pressed into the installation groove 173 is limited, and excessive squeezing between the first connector 171 and the second connector 172 caused by excessive pressing of the pressure cover 175 is avoided to cause damage. At the same time, by setting sealing members 1733 between the two inner walls at an angle to each other on the step portion 1732 and the pressure cover 175, the assembly gap between the pressure cover 175 and the installation groove 173 is effectively sealed, thereby ensuring the working stability of the internal electrical connector 170.

[0072] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. An oil well temperature and pressure measuring device, characterized in that: include: Main body, pressure sensing module, power supply module and control unit; The main body is cylindrical and is used to move in the oil well; The pressure sensing module, the power supply module and the control unit are all arranged in the side wall of the main body, and the pressure sensing module and the control unit, as well as the power supply module and the control unit are electrically connected in the side wall of the main body through leads; The control unit comprises a temperature sensing module, a collection control module and a data storage module. When the main body moves in the oil well, the collection control module is used to control the single collection duration of the pressure sensing module and the temperature sensing module, and the data storage module is used to store the collected data of the pressure sensing module and the temperature sensing module. The pressure sensing module is arranged at one end of the main control unit along the axial direction of the main body, the main body is provided with a cover plate sealingly covering the pressure sensing module and the main control unit, a through hole is arranged at a position on the cover plate opposite to the pressure sensing module, the through hole is used for the fluid in the oil well to pass through, so that the pressure sensing module can detect the pressure of the fluid; A plurality of connection holes are arranged at intervals along the axial direction of the main body on the edges of both sides of the cover plate, and the connection holes are used to be fixedly connected to the main body through threaded connectors. Grooves are arranged between adjacent connection holes on the edges of both sides of the cover plate.

2. The oil well temperature and pressure measuring device according to claim 1, characterized in that: The pressure sensing module has a strain gauge arranged opposite to the through hole, and a protective layer is arranged on the surface of the strain gauge, and the protective layer is used to improve the wear resistance, corrosion resistance and fatigue damage resistance of the strain gauge.

3. The oil well temperature and pressure measuring device according to claim 2, characterized in that: The protective layer includes a nano-plating layer.

4. The oil well temperature and pressure measuring device according to claim 1, characterized in that: An electrical connector is also provided in the side wall of the main body, and the electrical connector is located between the power supply module and the control unit, and the electrical connector electrically connects the lead wire of the power supply module and the lead wire of the control unit.

5. The oil well temperature and pressure measuring device according to claim 4, characterized in that: The side wall of the main body is provided with a mounting groove, the bottom of the mounting groove is provided with a connector bracket, the electrical connector is fixed on the connector bracket, the slot cover of the mounting groove is provided with a pressure cover, and the pressure cover presses the electrical connector.

6. The oil well temperature and pressure measuring device according to claim 5, characterized in that: The electrical connector includes a first connector and a second connector, the first connector is fixed to the connector bracket by a clamping piece, the inner wall of the gland is provided with a clamping piece, and the second connector is fixed to the clamping piece, so that when the gland is covered in the installation groove, the second connector is plugged into the first connector, and when the gland is removed from the installation groove, the second connector is pulled out from the first connector.

7. The oil well temperature and pressure measuring device according to claim 5, characterized in that: The inner side wall of the installation groove is provided with a clamping groove, the edge of the pressure cover abuts against the inner wall of the installation groove located within the clamping groove, and the end of the pressure cover away from the bottom of the installation groove is clamped and fixed to the clamping groove through a retaining ring.

8. The oil well temperature and pressure measuring device according to claim 7, characterized in that: A step portion is arranged at the notch of the installation groove, the pressure cover abuts against the step portion, and sealing members are arranged between two inner walls of the step portion which are at an angle to each other and the pressure cover.

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