Downhole pressure and temperature measuring system

Abstract

The utility model provides an underground pressure and temperature measuring system which comprises an underground pressure gauge arranged in an oil well and an equipment terminal arranged outside the oil well, a pressure and temperature acquisition module is arranged in the underground pressure gauge, and the equipment terminal transmits a power signal and a control instruction to the pressure and temperature acquisition module through a cable; the pressure and temperature acquisition module is powered on and receives a pressure signal and a temperature signal acquired by the bottom end of the pressure gauge body according to the control instruction; the pressure and temperature acquisition module sends a pressure signal and a temperature signal to the equipment terminal through a cable; the equipment terminal is used for displaying the received pressure signal and temperature signal; compared with the prior art, the underground pressure gauge has the advantages that the functions of collecting temperature data and pressure data are integrated through the designed underground pressure gauge so as to reduce the size of equipment, transmission of power signals, control signals and data can be achieved only by connecting one cable with an equipment terminal, the usage amount of the cables can be greatly reduced, and therefore the cable cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of data acquisition technology, and in particular to a downhole pressure and temperature measurement system. Background Technology

[0002] In downhole operations, changes in temperature and pressure reflect the environmental conditions of the well in real time. Therefore, it is necessary to determine the appropriate well maintenance, water injection and pressurization, fracturing, or acidizing treatment based on dynamic downhole pressure and temperature data. This requires the use of a downhole pressure and temperature measurement system to obtain downhole pressure and temperature data.

[0003] Traditional downhole pressure and temperature measurement systems rely on both temperature and pressure sensors. However, downhole environments are typically high-temperature and high-pressure environments, making traditional downhole measuring instruments such as infrared thermal imagers or infrared thermometers unsuitable for such conditions, resulting in significant measurement errors. Therefore, existing technologies utilize distributed fiber optic temperature sensors and fiber optic pressure sensors to measure downhole temperature and pressure data separately. These sensors offer advantages such as strong anti-interference capabilities, high sensitivity, and simple structure, enabling their application in high-temperature and high-pressure downhole environments. While this solves the environmental adaptability issue, using multiple instruments increases cable size and equipment volume. Cable tangling creates clutter on-site, and excessive cables and instruments also increase equipment costs. Utility Model Content

[0004] This invention provides a downhole pressure and temperature measurement system, the purpose of which is to integrate pressure and temperature acquisition into one unit without affecting the accuracy of signal measurement, thereby reducing the size of the equipment and lowering the equipment cost.

[0005] To achieve the above objectives, this utility model provides a downhole pressure and temperature measurement system, including a downhole pressure gauge installed in the oil well and an equipment terminal installed outside the oil well;

[0006] The downhole pressure gauge includes the pressure gauge body, pressure and temperature acquisition module, and cable;

[0007] The pressure and temperature acquisition module is located inside the pressure gauge body, and the bottom of the pressure gauge body is placed inside the measuring medium.

[0008] One end of the cable is connected to the data transmission terminal of the pressure and temperature acquisition module, and the other end of the cable is connected to the data transmission terminal of the device terminal. The cable passes through the top of the pressure gauge body.

[0009] The device terminal transmits power signals and control commands for controlling the acquisition of pressure and temperature signals to the pressure and temperature acquisition module via cables.

[0010] The pressure and temperature acquisition module is powered on and receives the pressure and temperature signals acquired from the bottom of the pressure gauge body according to the control command.

[0011] The pressure and temperature acquisition module sends pressure and temperature signals to the device terminal via a cable.

[0012] The device terminal is used to display the received pressure and temperature signals.

[0013] Furthermore, the pressure gauge body includes:

[0014] Pressure plate holder, base, core, outer shell, cable outlet fixing holder, sintered connector, cable outlet outer shell, cable clamp, cable fastener, cable connector;

[0015] A closed chamber is formed between the pressure seat and the base, and the core is placed in the closed chamber;

[0016] The upper part of the base is inserted into one end of the outer shell, and the pressure and temperature acquisition module is fixedly installed on the top of the base;

[0017] The input terminal of the pressure and temperature acquisition module is connected to the lead terminal of the core.

[0018] The first end of the cable outlet fixing bracket is inserted into the other end of the outer casing, and the second end of the cable outlet fixing bracket is inserted into the first end of the cable outlet outer casing;

[0019] The sintering connector is located at the second end of the wire outlet fixing base;

[0020] Both the cable clip and the cable fastener are located inside the outlet housing, and one end of the cable fastener extends to the outside of the outlet housing.

[0021] The cable passes through the cable fixing component, the wire clip and one end of the cable connector are connected. The first end of the cable connector is connected to the pressure and temperature acquisition module. The cable connector passes through the sintering connector and the cable outlet fixing seat in sequence.

[0022] Furthermore, the inside of the cable outlet casing is filled with insulating silicone grease.

[0023] Furthermore, cable fasteners include cable outlet nuts, screws, and wire clamping nuts;

[0024] The lead-out nut and the clamping nut are respectively located on both sides of the wire clamp;

[0025] The lead nut has a radial hole;

[0026] The screw is fitted into the radial hole of the cable outlet nut to secure the cable.

[0027] The cable passes through the cable exit nut, cable clamp, and wire clamp nut, and connects to one end of the cable connector.

[0028] Furthermore, an O-ring is provided at the connection between the pressure seat and the base;

[0029] Two O-rings are provided at the connection between the base and the outer shell;

[0030] Two O-rings are provided at the connection between the cable outlet fixing base and the outer casing;

[0031] An O-ring is provided at the connection between the cable outlet fixing base and the cable outlet housing.

[0032] Furthermore, the pressure and temperature acquisition module includes a processing unit, a transceiver unit, a data transmission interface, a signal transmission interface, and a programming interface;

[0033] The first data transmission end of the processing unit is connected to the first data transmission end of the transceiver unit, and the second data transmission end of the transceiver unit is connected to a cable through a data transmission interface.

[0034] The control terminal of the processing unit is connected to a cable via a signal transmission interface;

[0035] The first input terminal of the processing unit is connected to the programming interface;

[0036] The second input terminal of the processing unit is connected to the lead terminal of the core.

[0037] Furthermore, the processing unit includes:

[0038] Processing chip, first capacitor, second capacitor, third capacitor, fourth capacitor, fifth capacitor, sixth capacitor, seventh capacitor, eighth capacitor, ninth capacitor, tenth capacitor, eleventh capacitor, twelfth capacitor, thirteenth capacitor, fourteenth capacitor, fifteenth capacitor, sixteenth capacitor, seventeenth capacitor, first crystal oscillator, first inductor, first resistor, second resistor, third resistor, fourth resistor, fifth resistor, sixth resistor, seventh resistor, eighth resistor, ninth resistor, tenth resistor, eleventh resistor, twelfth resistor, thirteenth resistor, fourteenth resistor, fifteenth resistor;

[0039] The first pin of the processing chip is connected to the second end of the first resistor, the first end of the third capacitor, and the signal transmission interface. The first end of the first resistor is connected to the first end of the second capacitor, and the first end of the first capacitor is also connected to the signal transmission interface. The second end of the first capacitor is connected to the second end of the second capacitor and the second end of the third capacitor and grounded.

[0040] The fourth pin of the processing chip is connected to the first end of the first crystal oscillator and the first end of the fourth capacitor, respectively. The second end of the fourth capacitor is connected to the first end of the fifth capacitor and grounded.

[0041] The fifth pin of the processing chip is connected to the second terminal of the first crystal oscillator and the second terminal of the fifth capacitor, respectively.

[0042] The sixth pin of the processing chip is connected to the signal transmission interface;

[0043] The seventh pin of the processing chip is connected to the eighteenth pin of the processing chip;

[0044] The eighth pin of the processing chip is connected to the first end of the sixth capacitor;

[0045] The ninth pin of the processing chip is connected to the first end of the ninth capacitor.

[0046] The tenth pin of the processing chip is connected to the lead terminal of the core, the first terminal of the seventh capacitor, and the second terminal of the second resistor, respectively. The second terminal of the seventh capacitor is connected to the second terminal of the sixth capacitor and grounded.

[0047] The eleventh pin of the processing chip is connected to the lead terminal of the core, the first end of the second resistor, and the first end of the eighth capacitor, and is grounded.

[0048] The fourteenth pin of the processing chip is connected to the first end of the fifth resistor, the first end of the fourth resistor, and the first end of the third resistor. The second end of the third resistor is connected to the first end of the ninth capacitor. The second end of the ninth capacitor and the second end of the fourth resistor are grounded. The second end of the fifth resistor is connected to the first end of the sixth resistor. The second end of the sixth resistor is connected to the eighth pin of the processing chip.

[0049] The seventeenth pin of the processing chip is connected to the first end of the sixteenth capacitor;

[0050] The eighteenth pin of the processing chip is connected to the first terminal of the tenth capacitor and the first terminal of the eleventh capacitor, respectively.

[0051] The twentieth pin of the processing chip is connected to the first end of the twelfth capacitor, and the second end of the twelfth capacitor is connected to the second end of the tenth capacitor and the second end of the eleventh capacitor and grounded.

[0052] The twenty-first pin of the processing chip is connected to the first end of the eighth resistor, and the second end of the eighth resistor is grounded.

[0053] The twenty-second pin of the processing chip is connected to the second end of the fifth resistor;

[0054] The 23rd pin of the processing chip is connected to the first end of the 7th resistor, the first end of the 13th capacitor, the lead terminal of the core, and the second end of the 2nd resistor, respectively. The second end of the 7th resistor is connected to the chip lead terminal and the second end of the 13th capacitor and grounded.

[0055] The thirtieth pin of the processing chip is connected to the first end of the ninth resistor, and the second end of the ninth resistor is connected to the first data transmission end of the transceiver unit.

[0056] The thirty-first pin of the processing chip is connected to the first end of the tenth resistor, and the second end of the tenth resistor is connected to the first data transmission end of the transceiver unit.

[0057] The 32nd pin of the processing chip is connected to the first end of the 11th resistor, and the second end of the 11th resistor is connected to the first data transmission end of the transceiver unit.

[0058] The 37th pin of the processing chip is connected to the signal transmission interface, the first end of the 14th capacitor, the first end of the 15th capacitor, and the first end of the first inductor. The second end of the 14th capacitor is connected to the second end of the 15th capacitor and grounded. The second end of the first inductor is connected to the first end of the 12th resistor. The second end of the 12th resistor is connected to the first end of the 16th capacitor and the first end of the 17th capacitor. The second end of the 16th capacitor is connected to the second end of the 17th capacitor and grounded.

[0059] The 47th pin of the processing chip is connected to the programming interface and the first end of the 13th resistor, respectively.

[0060] The 48th pin of the processing chip is connected to the programming interface and the first end of the 14th resistor, respectively. The second end of the 14th resistor is connected to the second end of the 15th resistor and the signal transmission interface, respectively.

[0061] The first end of the fifteenth resistor is connected to the lead terminal of the core, and the second end of the fifteenth resistor is grounded.

[0062] Furthermore, the transceiver unit includes:

[0063] Transceiver chip, eighteenth capacitor, nineteenth capacitor, twentieth capacitor, twenty-first capacitor, twenty-second capacitor, second inductor, first diode, sixteenth resistor, seventeenth resistor, eighteenth resistor, nineteenth resistor;

[0064] The first pin of the transceiver chip is connected to the twentieth pin of the transceiver chip through the sixteenth resistor and grounded.

[0065] The second pin of the transceiver chip is connected to the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected to the data transmission interface and the cathode of the first diode, respectively.

[0066] The third pin of the transceiver chip is connected to the first end of the eighteenth resistor, and the second end of the eighteenth resistor is connected to the data transmission interface and the anode of the first diode, respectively.

[0067] The sixth pin of the transceiver chip is connected to the first terminal of the eighteenth capacitor and the first terminal of the nineteenth capacitor, respectively. The second terminal of the eighteenth capacitor is connected to the second terminal of the nineteenth capacitor and grounded.

[0068] The seventh pin of the transceiver chip is connected to the first end of the nineteenth resistor;

[0069] The eighth pin of the transceiver chip is connected to the second end of the eleventh resistor;

[0070] The ninth pin of the transceiver chip is connected to the first end of the twentieth capacitor, and the second end of the twentieth capacitor is connected to the second end of the nineteenth resistor and grounded.

[0071] The twelfth pin of the transceiver chip is connected to the second end of the ninth resistor;

[0072] The thirteenth pin of the transceiver chip is connected to the sixteenth pin of the transceiver chip and the first end of the second inductor, respectively. The second end of the second inductor is connected to the signal transmission interface.

[0073] The sixteenth pin of the transceiver chip is connected to the first terminal of the twenty-first capacitor and the first terminal of the twenty-second capacitor, respectively. The second terminal of the twenty-first capacitor is connected to the second terminal of the twenty-second capacitor and grounded.

[0074] The seventeenth pin of the transceiver chip is connected to the second end of the tenth resistor.

[0075] The above-mentioned solution of this utility model has the following beneficial effects:

[0076] This invention includes a downhole pressure gauge installed in an oil well and an external device terminal. A pressure-temperature acquisition module for collecting pressure and temperature signals is designed within the downhole pressure gauge. The device terminal transmits power signals and control commands for collecting these signals to the acquisition module via a cable. The acquisition module is powered on and receives the pressure and temperature signals acquired from the bottom of the pressure gauge body according to the control commands. The acquisition module then transmits the pressure and temperature signals to the device terminal via the cable. The device terminal displays the received pressure and temperature signals. Compared to existing technologies, this invention integrates the functions of collecting temperature and pressure data into a single downhole pressure gauge, reducing the device size. Only one cable is needed to connect to the device terminal for transmitting power, control, and data signals, significantly reducing cable usage and thus lowering cable costs.

[0077] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0078] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0079] Figure 2 This is a schematic diagram of the downhole pressure gauge in an embodiment of the present invention;

[0080] Figure 3This is a schematic diagram of the pressure and temperature acquisition module in an embodiment of the present invention.

[0081] Figure 4 This is a circuit diagram of the processing unit in an embodiment of the present invention;

[0082] Figure 5 This is a circuit diagram of the transceiver unit in an embodiment of this utility model.

[0083] The attached figures are labeled as follows:

[0084] 1-Pressure seat 2-Base 3-Core 4-Outer shell

[0085] 5-Pressure and temperature acquisition module; 6-Outlet cable fixing base; 7-Sintering connector.

[0086] 8-Outlet housing; 9-Cable clip; 11-Cable fastener; 12-O-ring

[0087] 110 - Outlet nut; 111 - Screw; 112 - Wire clamping nut; 13 - Insulating silicone grease. Detailed Implementation

[0088] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0089] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0090] like Figure 1 As shown, an embodiment of this utility model provides a downhole pressure and temperature measurement system, including a downhole pressure gauge installed in an oil well and an equipment terminal installed outside the oil well;

[0091] The downhole pressure gauge includes the pressure gauge body, pressure and temperature acquisition module, and cable;

[0092] The pressure and temperature acquisition module is located inside the pressure gauge body, and the bottom of the pressure gauge body is placed inside the measuring medium.

[0093] One end of the cable is connected to the data transmission terminal of the pressure and temperature acquisition module, and the other end of the cable is connected to the data transmission terminal of the device terminal. The cable passes through the top of the pressure gauge body.

[0094] The working principle of this utility model embodiment is as follows:

[0095] The device terminal transmits power signals and control commands for controlling the acquisition of pressure and temperature signals to the pressure and temperature acquisition module via cables.

[0096] The pressure and temperature acquisition module is powered on and receives pressure and temperature signals from the bottom of the pressure gauge body according to the control command.

[0097] The pressure and temperature acquisition module sends pressure and temperature signals to the device terminal via a cable.

[0098] The device terminal is used to display the received pressure and temperature signals.

[0099] It should be noted that the device terminal can be a controller consisting of a simple LED display screen or digital tube for displaying data and control buttons or keys for generating control signals to control the downhole pressure gauge. Alternatively, it can be a device terminal with a human-machine interface, such as a mobile phone, tablet computer, laptop computer, Ultra-mobile Personal Computer (UMPC), netbook, or Personal Digital Assistant (PDA). This utility model embodiment does not impose any restrictions on the specific type of device terminal.

[0100] The optimal choice is, such as Figure 2 As shown, the pressure gauge body includes:

[0101] 1. Pressure-applying base for pressure application; 2. Base for establishing a closed chamber with pressure-applying base 1; 3. Core for acquiring pressure and temperature signals; 4. Housing for protecting the pressure and temperature acquisition module; 5. Outlet fixing base for fixing cables; 6. Sintering connector for sintering cable connectors to circuit boards; 7. Outlet housing for protecting cable connectors; 8. Cable clip for limiting cable position; 9. Cable fixing component for preventing cable detachment; 11. Cable connector for connecting cables.

[0102] A closed chamber is formed between the pressure seat 1 and the base 2, and the core 3 is disposed in the closed chamber;

[0103] The upper part of the base 2 is inserted into one end of the outer shell 4, and the pressure and temperature acquisition module 5 is fixedly installed on the top of the base 2;

[0104] The input terminal of the pressure and temperature acquisition module 5 is connected to the lead terminal of the core 3;

[0105] The first end of the cable outlet fixing base 6 is inserted into the other end of the outer casing 4, and the second end of the cable outlet fixing base 6 is inserted into the first end of the cable outlet outer casing 8;

[0106] The sintering connector 7 is located at the second end of the wire outlet fixing base 6;

[0107] Both the cable clip 9 and the cable fastener 11 are located inside the cable outlet housing 8, and one end of the cable fastener 11 extends to the outside of the cable outlet housing 8.

[0108] The cable passes through the cable fixing piece 11, the wire clip 9 and connects to one end of the cable connector. The first end of the cable connector is connected to the pressure and temperature acquisition module 5. The cable connector passes through the sintering connector 7 and the cable outlet fixing seat 6 in sequence.

[0109] In this embodiment of the utility model, the core 3 includes a pressure sensing chip of model MPM283Ⅱ17S and a temperature sensing chip of model PT100. The pressure sensing chip obtains a pressure signal by applying pressure through a pressure seat, and the temperature sensing chip is used to obtain a temperature signal.

[0110] In this embodiment of the invention, in order to prevent the pressure sensing chip and temperature sensing chip from being corroded and damaged by the measuring medium, a closed chamber for placing the core 3 is provided between the top of the pressure base 1 and the bottom of the base 2.

[0111] Preferably, the shapes of the outer shell 4 and the cable outlet shell 8 are not limited to hollow cylinders, but can also be some hollow prisms with relatively regular shapes.

[0112] The preferred option is that the inside of the cable outlet housing 8 is filled with insulating silicone grease 13. The function of insulating silicone grease 13 is that insulating silicone grease is a silicone lubricant that does not harden or solidify. It is suitable for electronic and electrical components, connectors, joints and other parts. The product has the function of sealing, protecting and maintaining components or parts.

[0113] The preferred embodiment is that the cable fixing component 11 includes a cable outlet nut 110, a screw 111, and a wire clamping nut 112;

[0114] The lead-out nut 110 and the clamping nut 112 are respectively located on both sides of the wire clamp 9;

[0115] The lead nut 110 has a radial hole that matches the size of the screw 111;

[0116] Screw 111 is fitted into the radial hole of cable nut 110 to secure the cable;

[0117] The cable passes through the cable exit nut 110, the cable clamp 9, and the wire clamp nut 112, and connects to one end of the cable connector.

[0118] Preferably, an O-ring 12 is provided at the connection between the pressure seat 1 and the base 2;

[0119] Two O-rings 12 are provided at the connection between the base 2 and the outer shell 4;

[0120] Two O-rings 12 are provided at the connection between the cable outlet fixing base 6 and the outer casing 4;

[0121] An O-ring 12 is provided at the connection between the cable outlet fixing base 6 and the cable outlet housing 8.

[0122] In this embodiment of the utility model, the function of the O-ring 12 is to seal the enclosed chamber, the outer shell 4 and the outlet shell 8 to prevent water and other liquids with the ability to penetrate gaps from entering the enclosed chamber, the outer shell 4 and the outlet shell 8 and causing corrosion of the metal materials.

[0123] The optimal choice is, such as Figure 3 As shown, the pressure and temperature acquisition module 5 includes a processing unit, a transceiver unit, a data transmission interface, a signal transmission interface, and a programming interface;

[0124] The first data transmission end of the processing unit is connected to the first data transmission end of the transceiver unit, and the second data transmission end of the transceiver unit is connected to a cable through a data transmission interface.

[0125] The control terminal of the processing unit is connected to a cable via a signal transmission interface;

[0126] The first input terminal of the processing unit is connected to the programming interface;

[0127] The second input terminal of the processing unit is connected to the lead terminal of the core 3.

[0128] In this embodiment of the invention, the processing unit obtains the functional program for processing pressure and temperature signals through the programming interface. The power signal provided by the device terminal provides working power to the processing unit and the transceiver unit through the signal transmission interface, so that the processing unit and the transceiver unit can be powered on and put into operation. The device terminal communicates with the transceiver unit through the signal transmission interface and sends control commands to the processing unit. The processing unit collects the pressure and temperature signals obtained by the core 3 according to the control commands, converts the pressure and temperature signals, and uploads them to the device terminal through the transceiver unit. The device terminal is used to visualize the converted pressure and temperature signals to intuitively obtain downhole pressure and temperature data.

[0129] The optimal choice is, such as Figure 4 As shown, the processing unit includes:

[0130] Processing chip U1, first capacitor C1, second capacitor C2, third capacitor C3, fourth capacitor C4, fifth capacitor C5, sixth capacitor C6, seventh capacitor C7, eighth capacitor C8, ninth capacitor C9, tenth capacitor C10, eleventh capacitor C11, twelfth capacitor C12, thirteenth capacitor C13, fourteenth capacitor C14, fifteenth capacitor C15, sixteenth capacitor C16, seventeenth capacitor C17, first crystal oscillator Y1, first inductor L1, first resistor R1, second resistor R2, third resistor R3, fourth resistor R4, fifth resistor R5, sixth resistor R6, seventh resistor R7, eighth resistor R8, ninth resistor R9, tenth resistor R10, eleventh resistor R11, twelfth resistor R12, thirteenth resistor R13, fourteenth resistor R14, fifteenth resistor R15;

[0131] The first pin of the processing chip U1 is connected to the second end of the first resistor R1, the first end of the third capacitor C3, and the signal transmission interface P1. The first end of the first resistor R1 is connected to the first end of the second capacitor C2, and the first end of the first capacitor C1 is also connected to the signal transmission interface P1. The second end of the first capacitor C1 is connected to the second end of the second capacitor C2 and the second end of the third capacitor C3 and is grounded.

[0132] The fourth pin of the processing chip U1 is connected to the first terminal of the first crystal oscillator Y1 and the first terminal of the fourth capacitor C4, respectively. The second terminal of the fourth capacitor C4 is connected to the first terminal of the fifth capacitor C5 and grounded.

[0133] The fifth pin of the processing chip U1 is connected to the second terminal of the first crystal oscillator Y1 and the second terminal of the fifth capacitor C5, respectively.

[0134] The sixth pin of the processing chip U1 is connected to the signal transmission interface P1;

[0135] Pin 7 of processing chip U1 is connected to pin 18 of processing chip U1;

[0136] The eighth pin of the processing chip U1 is connected to the first end of the sixth capacitor C6;

[0137] The ninth pin of the processing chip U1 is connected to the first end of the ninth capacitor C9;

[0138] The tenth pin of the processing chip U1 is connected to the lead terminal of the core 3, the first end of the seventh capacitor C7, and the second end of the second resistor R2. The second end of the seventh capacitor C7 is connected to the second end of the sixth capacitor C6 and grounded.

[0139] The eleventh pin of the processing chip U1 is connected to the lead terminal of the core 3, the first end of the second resistor R2, and the first end of the eighth capacitor C8, and grounded.

[0140] The fourteenth pin of the processing chip U1 is connected to the first end of the fifth resistor R5, the first end of the fourth resistor R4, and the first end of the third resistor R3. The second end of the third resistor R3 is connected to the first end of the ninth capacitor C9. The second end of the ninth capacitor C9 and the second end of the fourth resistor R4 are grounded. The second end of the fifth resistor R5 is connected to the first end of the sixth resistor R6. The second end of the sixth resistor R6 is connected to the eighth pin of the processing chip U1.

[0141] Pin 17 of the processing chip U1 is connected to the first end of the sixteenth capacitor C16;

[0142] The eighteenth pin of the processing chip U1 is connected to the first terminal of the tenth capacitor C10 and the first terminal of the eleventh capacitor C11, respectively.

[0143] The twentieth pin of the processing chip U1 is connected to the first end of the twelfth capacitor C12. The second end of the twelfth capacitor C12 is connected to the second end of the tenth capacitor C10 and the second end of the eleventh capacitor C11 and grounded.

[0144] The twenty-first pin of the processing chip U1 is connected to the first end of the eighth resistor R8, and the second end of the eighth resistor R8 is grounded.

[0145] The 22nd pin of the processing chip U1 is connected to the second end of the fifth resistor R5;

[0146] The 23rd pin of the processing chip U1 is connected to the first end of the 7th resistor R7, the first end of the 13th capacitor C13, the lead terminal of the core 3, and the second end of the second resistor R2. The second end of the 7th resistor R7 is connected to the chip lead terminal and the second end of the 13th capacitor C13 and grounded.

[0147] Pin 30 of the processing chip U1 is connected to the first end of the ninth resistor R9, and the second end of the ninth resistor R9 is connected to the first data transmission end of the transceiver unit.

[0148] The thirty-first pin of the processing chip U1 is connected to the first end of the tenth resistor R10, and the second end of the tenth resistor R10 is connected to the first data transmission end of the transceiver unit.

[0149] The thirty-second pin of the processing chip U1 is connected to the first end of the eleventh resistor R11, and the second end of the eleventh resistor R11 is connected to the first data transmission end of the transceiver unit.

[0150] The thirty-seventh pin of the processing chip U1 is connected to the signal transmission interface P1, the first end of the fourteenth capacitor C14, the first end of the fifteenth capacitor C15, and the first end of the first inductor L1. The second end of the fourteenth capacitor C14 is connected to the second end of the fifteenth capacitor C15 and grounded. The second end of the first inductor L1 is connected to the first end of the twelfth resistor R12. The second end of the twelfth resistor R12 is connected to the first end of the sixteenth capacitor C16 and the first end of the seventeenth capacitor C17. The second end of the sixteenth capacitor C16 is connected to the second end of the seventeenth capacitor C17 and grounded.

[0151] Pin 47 of the processing chip U1 is connected to the programming interface P2 and the first end of the thirteenth resistor R13, respectively.

[0152] The 48th pin of the processing chip U1 is connected to the programming interface P2 and the first end of the 14th resistor R14, respectively. The second end of the 14th resistor R14 is connected to the second end of the 15th resistor R15 and the signal transmission interface P1, respectively.

[0153] The first end of the fifteenth resistor R15 is connected to the lead terminal of the core 3, and the second end of the fifteenth resistor R15 is grounded.

[0154] It should be noted that the processing unit provided in this embodiment of the present invention integrates a high-precision 24-bit ADC. The processing chip adopts a conventional STM32 series microcontroller processing chip, which is used to generate control signals according to the signal to acquire data signals and to perform ADC conversion processing on the input signal. This is a function of the processing unit itself and is a known technology. This embodiment of the present invention does not involve any improvement to the software part inside the processing unit. Therefore, the specific process of signal processing will not be described in detail in this embodiment.

[0155] The optimal choice is, such as Figure 5 As shown, the transceiver unit includes:

[0156] The transceiver chip U2 with model number NCN5150MNTWG, the eighteenth capacitor C18, the nineteenth capacitor C19, the twentieth capacitor C20, the twenty-first capacitor C21, the twenty-second capacitor C22, the second inductor L2, the first diode D1, the sixteenth resistor R16, the seventeenth resistor R17, the eighteenth resistor R18, and the nineteenth resistor R19;

[0157] The first pin of transceiver chip U2 is connected to the twentieth pin of transceiver chip U2 through the sixteenth resistor R16 and grounded;

[0158] The second pin of transceiver chip U2 is connected to the first end of the seventeenth resistor R17, and the second end of the seventeenth resistor R17 is connected to the data transmission interface P3 and the cathode of the first diode D1, respectively.

[0159] The third pin of the transceiver chip U2 is connected to the first end of the eighteenth resistor R18, and the second end of the eighteenth resistor R18 is connected to the data transmission interface P3 and the anode of the first diode D1, respectively.

[0160] The sixth pin of the transceiver chip U2 is connected to the first terminal of the eighteenth capacitor C18 and the first terminal of the nineteenth capacitor C19, respectively. The second terminal of the eighteenth capacitor C18 and the second terminal of the nineteenth capacitor C19 are connected to and grounded.

[0161] The seventh pin of the transceiver chip U2 is connected to the first end of the nineteenth resistor R19;

[0162] The eighth pin of the transceiver chip U2 is connected to the second end of the eleventh resistor R11;

[0163] The ninth pin of the transceiver chip U2 is connected to the first end of the twentieth capacitor C20, and the second end of the twentieth capacitor C20 is connected to the second end of the nineteenth resistor R19 and grounded.

[0164] The twelfth pin of transceiver chip U2 is connected to the second end of the ninth resistor R9;

[0165] The thirteenth pin of the transceiver chip U2 is connected to the sixteenth pin of the transceiver chip U2 and the first end of the second inductor L2. The second end of the second inductor L2 is connected to the signal transmission interface P1 to receive the power signal IOVDD.

[0166] The sixteenth pin of the transceiver chip U2 is connected to the first terminal of the twenty-first capacitor C21 and the first terminal of the twenty-second capacitor C22, respectively. The second terminal of the twenty-first capacitor C21 is connected to the second terminal of the twenty-second capacitor C22 and grounded.

[0167] The seventeenth pin of the transceiver chip U2 is connected to the second end of the tenth resistor R10.

[0168] It should be noted that the transceiver unit in this embodiment of the utility model is only used to establish a communication channel between the processing unit and the device terminal to facilitate data transmission, and does not involve any improvement to the software.

[0169] This utility model embodiment includes a downhole pressure gauge installed in an oil well and an equipment terminal installed outside the oil well. A pressure-temperature acquisition module for collecting pressure and temperature signals is designed into the downhole pressure gauge. The equipment terminal transmits power signals and control commands for controlling the collection of pressure and temperature signals to the pressure-temperature acquisition module via a cable. The pressure-temperature acquisition module is powered on and receives pressure and temperature signals acquired from the bottom of the pressure gauge body according to the control commands. The pressure-temperature acquisition module sends pressure and temperature signals to the equipment terminal via a cable. The equipment terminal displays the received pressure and temperature signals. Compared with the prior art, this utility model embodiment integrates the functions of collecting temperature and pressure data into one downhole pressure gauge to reduce the size of the equipment. Only one cable is needed to connect to the equipment terminal to transmit power, control, and data signals, which greatly reduces the amount of cable used and thus lowers cable costs.

[0170] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A downhole pressure temperature measurement system, characterized by, The downhole pressure gauge is arranged in the oil well, and the equipment terminal is arranged outside the oil well; The downhole pressure gauge comprises a pressure gauge body, a pressure temperature acquisition module and a cable; The pressure temperature acquisition module is arranged inside the pressure gauge body, and a bottom end of the pressure gauge body is arranged in a measuring medium; One end of the cable is connected with a data transmission end of the pressure temperature acquisition module, the other end of the cable is connected with a data transmission end of the equipment terminal, and the cable is arranged to pass through a top of the pressure gauge body; The equipment terminal transmits a power supply signal and a control instruction for controlling acquisition of pressure signals and temperature signals to the pressure temperature acquisition module through the cable; The pressure temperature acquisition module is powered on and receives pressure signals and temperature signals acquired by the bottom end of the pressure gauge body according to the control instruction; The pressure temperature acquisition module transmits the pressure signals and the temperature signals to the equipment terminal through the cable; The equipment terminal is used for displaying the received pressure signals and temperature signals.

2. The downhole pressure-temperature measuring system of claim 1, wherein, The pressure gauge body comprises: a pressure lead seat, a base, a core, a shell, a cable fixing seat, a sintered linker, a cable shell, a cable clamp, a cable fixing part and a cable connecting part; a closed cavity is formed between the pressure lead seat and the base, and the core is arranged in the closed cavity; an upper part of the base is inserted into one end of the shell, and the pressure temperature acquisition module is fixedly arranged on a top of the base; an input end of the pressure temperature acquisition module is connected with a lead terminal of the core; a first end of the cable fixing seat is inserted into the other end of the shell, and a second end of the cable fixing seat is inserted into a first end of the cable shell; the sintered linker is arranged at the second end of the cable fixing seat; the cable clamp and the cable fixing part are arranged in the cable shell, and one end of the cable fixing part extends to an outside of the cable shell; the cable passes through the cable fixing part, the cable clamp and one end of the cable connecting part, a first end of the cable connecting part is connected with the pressure temperature acquisition module, and the cable connecting part passes through the sintered linker and the cable fixing seat in sequence.

3. The downhole pressure-temperature measuring system of claim 2, wherein, The inside of the cable shell is filled with insulating silicone grease.

4. The downhole pressure-temperature measuring system of claim 3, wherein, The cable fixing part comprises a cable outlet nut, a screw and a wire pressing nut; the cable outlet nut and the wire pressing nut are arranged on two sides of the cable clamp respectively; a radial hole is arranged on the cable outlet nut; the screw is arranged in the radial hole of the cable outlet nut and is used for fixing the cable; the cable passes through the cable outlet nut, the cable clamp, the wire pressing nut and one end of the cable connecting part.

5. The downhole pressure temperature measurement system according to claim 4, wherein an O-shaped ring is arranged at a connection between the pressure lead seat and the base; two O-shaped rings are arranged at a connection between the base and the shell; two O-shaped rings are arranged at a connection between the cable fixing seat and the shell; one O-shaped ring is arranged at a connection between the cable fixing seat and the cable shell.

6. The downhole pressure-temperature measuring system of claim 2, wherein, The pressure temperature acquisition module comprises a processing unit, a transceiver unit, a data transmission interface, a signal transmission interface and a burning interface; The first data transmission end of the processing unit is connected with the first data transmission end of the transceiving unit, and the second data transmission end of the transceiving unit is connected with the cable through the data transmission interface; The control end of the processing unit is connected with the cable through the signal transmission interface; The first input end of the processing unit is connected with the burning interface; The second input end of the processing unit is connected with the lead terminal of the core body.

7. The downhole pressure-temperature measuring system of claim 6, wherein, The processing unit comprises: a processing chip, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a fifteenth capacitor, a sixteenth capacitor, a seventeenth capacitor, a first crystal oscillator, a first inductor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor; The first pin of the processing chip is connected with the second end of the first resistor, the first end of the third capacitor and the signal transmission interface, the first end of the first resistor is connected with the first end of the second capacitor and the first end of the first capacitor respectively, and the second end of the first capacitor is connected with the second end of the second capacitor and the second end of the third capacitor respectively and grounded; The fourth pin of the processing chip is connected with the first end of the first crystal oscillator and the first end of the fourth capacitor respectively, and the second end of the fourth capacitor is connected with the first end of the fifth capacitor and grounded; The fifth pin of the processing chip is connected with the second end of the first crystal oscillator and the second end of the fifth capacitor respectively; The sixth pin of the processing chip is connected with the signal transmission interface; The seventh pin of the processing chip is connected with the eighteenth pin of the processing chip; The eighth pin of the processing chip is connected with the first end of the sixth capacitor; The ninth pin of the processing chip is connected with the first end of the ninth capacitor; The tenth pin of the processing chip is connected with the lead terminal of the core body, the first end of the seventh capacitor and the second end of the second resistor respectively, the second end of the seventh capacitor is connected with the second end of the sixth capacitor and grounded; The eleventh pin of the processing chip is connected with the lead terminal of the core body, the first end of the second resistor and the first end of the eighth capacitor respectively and grounded; The fourteenth pin of the processing chip is connected with the first end of the fifth resistor, the first end of the fourth resistor and the first end of the third resistor respectively, the second end of the third resistor is connected with the first end of the ninth capacitor, the second end of the ninth capacitor and the second end of the fourth resistor are grounded, the second end of the fifth resistor is connected with the first end of the sixth resistor, and the second end of the sixth resistor is connected with the eighth pin of the processing chip; The seventeenth pin of the processing chip is connected with the first end of the sixteenth capacitor. The eighteenth pin of the processing chip is connected with the first end of the tenth capacitor and the first end of the eleventh capacitor respectively; The twentieth pin of the processing chip is connected with the first end of the twelfth capacitor, and the second end of the twelfth capacitor is connected with the second end of the tenth capacitor and the second end of the eleventh capacitor respectively and grounded; The twenty-first pin of the processing chip is connected with the first end of the eighth resistor, and the second end of the eighth resistor is grounded; The twenty-second pin of the processing chip is connected with the second end of the fifth resistor; The twenty-third pin of the processing chip is connected with the first end of the seventh resistor, the first end of the thirteenth capacitor, the lead terminal of the core body and the second end of the second resistor respectively, and the second end of the seventh resistor is connected with the lead terminal of the chip and the second end of the thirteenth capacitor respectively and grounded; The thirtieth pin of the processing chip is connected with the first end of the ninth resistor, and the second end of the ninth resistor is connected with the first data transmission end of the transceiving unit; The thirty-first pin of the processing chip is connected with the first end of the tenth resistor, and the second end of the tenth resistor is connected with the first data transmission end of the transceiving unit; The thirty-second pin of the processing chip is connected with the first end of the eleventh resistor, and the second end of the eleventh resistor is connected with the first data transmission end of the transceiving unit; The thirty-seventh pin of the processing chip is connected with the signal transmission interface, the first end of the fourteenth capacitor, the first end of the fifteenth capacitor and the first end of the first inductor respectively, the second end of the fourteenth capacitor is connected with the second end of the fifteenth capacitor and grounded, the second end of the twelfth resistor is connected with the first end of the sixteenth capacitor and the first end of the seventeenth capacitor respectively, the second end of the sixteenth capacitor is connected with the second end of the seventeenth capacitor and grounded; The forty-seventh pin of the processing chip is connected with the burning interface and the first end of the thirteenth resistor respectively; The forty-eighth pin of the processing chip is connected with the burning interface and the first end of the fourteenth resistor respectively, and the second end of the fourteenth resistor is connected with the second end of the fifteenth resistor and the signal transmission interface respectively; The first end of the fifteenth resistor is connected with the lead terminal of the core body, and the second end of the fifteenth resistor is grounded.

8. The downhole pressure-temperature measuring system of claim 7, wherein, The transceiving unit comprises: a transceiving chip, an eighteenth capacitor, a nineteenth capacitor, a twentieth capacitor, a twenty-first capacitor, a twenty-second capacitor, a second inductor, a first diode, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor and a nineteenth resistor; The first pin of the transceiving chip is connected with the twentieth pin of the transceiving chip through the sixteenth resistor and grounded; The second pin of the transceiving chip is connected with the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected with the data transmission interface and the cathode of the first diode respectively; The third pin of the transceiver chip is connected with the first end of the eighteenth resistor, and the second end of the eighteenth resistor is connected with the data transmission interface and the anode of the first diode respectively; The sixth pin of the transceiver chip is connected with the first end of the eighteenth capacitor and the first end of the nineteenth capacitor respectively, the second end of the eighteenth capacitor is connected with the second end of the nineteenth capacitor and grounded; The seventh pin of the transceiver chip is connected with the first end of the nineteenth resistor; The eighth pin of the transceiver chip is connected with the second end of the eleventh resistor; The ninth pin of the transceiver chip is connected with the first end of the twentieth capacitor, and the second end of the twentieth capacitor is connected with the second end of the nineteenth resistor and grounded; The twelfth pin of the transceiver chip is connected with the second end of the ninth resistor; The thirteenth pin of the transceiver chip is connected with the sixteenth pin of the transceiver chip and the first end of the second inductor respectively, and the second end of the second inductor is connected with the signal transmission interface; The sixteenth pin of the transceiver chip is connected with the first end of the twenty-first capacitor and the first end of the twenty-second capacitor respectively, and the second end of the twenty-first capacitor is connected with the second end of the twenty-second capacitor and grounded; The seventeenth pin of the transceiver chip is connected with the second end of the tenth resistor.

Images