Storage type downhole pressure testing device and system

Abstract

The utility model relates to the technical field of oil exploration, solves the technical problems that in the prior art, a rubber sealing ring is prone to aging failure, and oil, water and gas cause short circuit corrosion of a sensor and a circuit board, and particularly relates to a storage type underground pressure testing device and system. The bottom of the ground reading mechanism is provided with an underground high-temperature-resistant storage type pressure gauge used for measuring the underground pressure of an oil field, and the underground high-temperature-resistant storage type pressure gauge comprises a connecting top seat used for protecting an internal circuit of the pressure testing device, a battery outer cylinder and a circuit board outer cylinder. The aging condition of the sealing rubber ring after long-term use is avoided, the sealing effect is reduced, and the probability of short circuit or corrosion of the sensor and the circuit board in the device is reduced, so that the integrated welding does not affect maintenance, the service life of the device can be prolonged, and the short circuit corrosion problem of the device is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to petroleum exploration technical field especially, relates to a storage type downhole pressure testing device and system. BACKGROUND

[0002] Downhole pressure gauge is used for measuring the professional test tool of oilfield oil and gas well downhole liquid or gas pressure, downhole pressure gauge can help engineers understand the pressure change situation in the oil well, wherein the storage type pressure gauge is usually in the oil and gas well test operation, the pressure gauge suspension device is installed in the downhole oil pipe, and the next operation is taken out together, the downhole working condition is worse, usually faces high temperature, high pressure, vibration and corrosive environment, and after going downhole, usually needs to be placed in the well fluid for more than half a year or frequent tripping, these factors can easily cause the existing technology to easily malfunction, the aging failure of the rubber sealing ring in the structure body, the oil, water, gas and other substances into the sensor, and then make the circuit board and sensor short circuit, corrosion failure, make the downhole pressure gauge not work normally, seriously affect the normal work of downhole, reduce the efficiency of downhole work. SUMMARY

[0003] In view of the defects of the prior art, the utility model provides a light adjusting signal isolation converter, solves the technical problem that the prior art can easily cause the aging failure of the rubber sealing ring, causes the oil, water and gas to cause the short circuit and corrosion of the sensor and the circuit board, avoids the aging of the sealing rubber ring, solves the problem that the oil, water and gas cause the short circuit and corrosion of the circuit board sensor.

[0004] To solve the above technical problems, the utility model provides the following technical scheme: a storage type downhole pressure testing device, including ground reading mechanism, the ground reading mechanism bottom is provided with the downhole high temperature resistant storage type pressure gauge for measuring oilfield downhole pressure.

[0005] Preferably, the downhole high temperature resistant storage type pressure gauge includes a connecting top seat for protecting the internal circuit of the pressure testing device, a battery outer tube and a circuit board outer tube, the connecting top seat, the battery outer tube and the circuit board outer tube are welded and connected, the top end of the circuit board outer tube is fixedly connected with a battery buffer pad, the bottom end of the battery buffer pad is slidably connected with a pressure gauge circuit board, the bottom end of the pressure gauge circuit board is fixedly connected with a pressure gauge core body, and the bottom end of the pressure gauge core body is fixedly connected with a guide pressure guide head.

[0006] Preferably, the downhole high temperature resistant storage type pressure gauge further includes a conductive needle fixedly connected to the top end of the connecting top seat, the inner wall bottom end of the connecting top seat is fixedly connected with a vibration buffer pad, and the bottom end of the vibration buffer pad is fixedly connected with a high-temperature lithium battery for providing electric energy to the pressure testing device.

[0007] Preferably, the downhole high-temperature-resistant storage type pressure gauge further comprises a pressure guide adapter fixedly connected to the bottom end of the pressure gauge core body for mounting the pressure gauge core body.

[0008] Preferably, the surface reading mechanism comprises a shell, an inner steel ball holder fixedly connected to the inner wall of the shell, a top circuit board fixedly connected to the top end of the inner steel ball holder for connecting a conductive needle, a protective sleeve fixedly connected to the top end of the shell, a USB connecting line fixedly connected to the top end of the protective sleeve, and a stop ring fixedly connected to the bottom end of the shell.

[0009] Preferably, the surface reading mechanism further comprises a limiting steel ring fixedly connected to the inside of the inner steel ball holder, and a steel ball slidingly connected to the inside of the limiting steel ring.

[0010] Preferably, the side end of the shell is fixedly connected with an anti-lost chain, the side end of the anti-lost chain is rotatably connected with a connecting seat, and the bottom end of the connecting seat is fixedly connected with a rubber dustproof plug for dust prevention.

[0011] The technical scheme further provides a downhole pressure testing system applied to the storage type downhole pressure testing device, which comprises a micro-processing module, and further comprises a storage module, a power management module and an analog-digital conversion module.

[0012] Preferably, the power management module is composed of a power chip and a current limiting resistor R2, the EN port of the power chip is connected with the micro-processing module, the Vin signal is input into the IN port of the power chip, the OUT port of the power chip outputs the Vout signal, and the ILIM port of the power chip is grounded through the current limiting resistor R2.

[0013] Preferably, the analog-digital conversion module is composed of a pressure sensitive bridge, an analog-digital conversion chip and an RTD resistor, the pressure sensitive bridge is respectively input into the REFIN1+ port, the REFIN1- port, the AIN1+ port and the AIN1- port of the analog-digital conversion chip, the RTD resistor is input into the RTD+ port of the analog-digital conversion chip, and the SPL_1 port of the analog-digital conversion chip is connected with the micro-processing module.

[0014] Preferably, the storage module is composed of a storage chip, and the SPL_2 port of the storage chip is connected with the micro-processing module.

[0015] Preferably, the model of the micro-processing module is STM32, the model of the storage module is W25Q256, the model of the power management module is TPS2553, and the model of the analog-digital conversion module is AD7799.

[0016] By means of the above technical scheme, the storage type downhole pressure testing device and system provided by the utility model have at least the following beneficial effects:

[0017] 1、The utility model discloses a whole welding sealing is carried out to the internal structure of storage type downhole pressure testing device through the mode of integral type welding connection, also adopts the mode of welding at the connecting part of key casing, avoids the aging condition of sealing rubber ring long -term use, leads to the sealed effect drop, reduces the probability that the internal sensor and circuit board of device short -circuit or corrosion, because storage type downhole pressure testing device needs to use continuously in the well for more than one year, therefore integral type welding not only does not influence maintenance, can enhance the service life of device, reduces the short -circuit corrosion problem of device.

[0018] 2、The utility model discloses through the casing of high temperature resistance, connecting top seat, battery outer tube and circuit board outer tube make the shell of pressure testing device can work in the high temperature environment of several hundred degrees, far higher than the prior art 150 degrees high temperature, and under high temperature environment, through high temperature lithium battery power supply to device, can provide stable electric energy to the circuit system of storage type pressure testing device, prolongs the service life of device.

[0019] 3、The utility model discloses through the synergies of storage module and power management module, can in the process of pressure detection, real -time storage is carried out to test result, and storage time is greater than one year time, is convenient for staff to carry out long -term test to downhole pressure, and the power management module of this device can intelligently adjust the power supply mode of device, makes device can long -term stable operation under the condition of low power consumption.

[0020] 4、The utility model discloses through USB connecting line and the computer connection of top, detects the downhole pressure temperature in real time, carries out accurate fitting and early warning to pressure and temperature through artificial intelligence model, guarantees the accuracy of downhole parameter acquisition, can also forecast and early warning to downhole condition, ensures the safety of oil and gas well downhole work. ACCURATE DESCRIPTION

[0021] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0022] Figure 1 It is the side view of the utility model discloses a storage type downhole pressure testing device;

[0023] Figure 2 It is the side sectional view of the ground reading mechanism of the utility model;

[0024] Figure 3 It is the side sectional view of the utility model downhole high temperature resistant storage type pressure gauge;

[0025] Figure 4The utility model relates to a kind of storage type underground pressure test system structure diagram.

[0026] Figure 5 The utility model relates to the circuit diagram of storage type underground pressure test system.

[0027] Figure 6 The utility model relates to the circuit diagram of microprocessing module and analog-digital conversion module.

[0028] Figure 7 The utility model relates to the circuit diagram of storage module and power management module.

[0029] Figure 8 The utility model relates to the fitting curve diagram of temperature pressure data.

[0030] Figure 9 The utility model relates to the flow chart of storage type underground pressure test system data acquisition.

[0031] In the drawing: 1, downhole high-temperature-resistant storage type pressure gauge;11, conductive needle;12, connecting top seat;13, shock cushion pad;14, high-temperature lithium battery;15, battery outer cylinder;16, battery cushion pad;17, pressure gauge circuit board;18, circuit board outer cylinder;19, pressure gauge core body;110, pressure guide adapter;111, guide pressure head;2, ground reading mechanism;21, rubber dustproof plug;22, connecting seat;23, anti-lost chain;24, shell;25, built-in steel ball holder;26, top circuit board;27, protective sleeve;28, USB connecting line;29, steel ball;210, limiting steel ring;211, baffle ring;3, microprocessing module;4, storage module;5, power management module;6, analog-digital conversion module. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model will be further described in detail below with the help of drawings and specific embodiments. By this, the realization process of how to apply technical means to solve technical problems and achieve technical effects in this application can be fully understood and implemented.

[0033] Embodiment one

[0034] As the prior art is prone to aging and failure of rubber sealing ring, causing oil, water and gas to cause short circuit and corrosion of sensor and circuit board, please refer to Figure 1 - Figure 3The embodiment provides a storage type downhole pressure testing device, which can avoid aging of a sealing rubber ring, and solves the problem of short circuit and corrosion of a circuit board sensor caused by oil, water and gas. The device comprises a ground reading mechanism 2, a bottom of the ground reading mechanism 2 is provided with a downhole high-temperature-resistant storage type pressure gauge 1 for measuring downhole pressure of an oil field, the downhole high-temperature-resistant storage type pressure gauge 1 comprises a connecting top seat 12 for protecting internal circuits of the pressure testing device, a battery outer cylinder 15 and a circuit board outer cylinder 18, the connecting top seat 12, the battery outer cylinder 15 and the circuit board outer cylinder 18 are welded and connected, the circuit board outer cylinder 18 is fixedly connected with a battery buffer pad 16 at the top end, the battery buffer pad 16 is slidably connected with a pressure gauge circuit board 17 at the bottom end, the pressure gauge circuit board 17 is fixedly connected with a pressure gauge core body 19 at the bottom end, the pressure gauge core body 19 is fixedly connected with a guide pressure guide head 111 at the bottom end, the downhole high-temperature-resistant storage type pressure gauge 1 and the ground reading mechanism 2 are integrally welded and connected, the downhole high-temperature-resistant storage type pressure gauge 1 further comprises a conductive needle 11 fixedly connected at the top end of the connecting top seat 12, a vibration buffer pad 13 fixedly connected at the bottom end of the inner wall of the connecting top seat 12, and a high-temperature lithium battery 14 for providing electric energy to the pressure testing device fixedly connected at the bottom end of the vibration buffer pad 13, and the downhole high-temperature-resistant storage type pressure gauge 1 further comprises a pressure guide adapter 110 fixedly connected at the bottom end of the pressure gauge core body 19 for adding the pressure gauge core body 19.

[0035] The utility model discloses a high temperature resistant storage type pressure gauge 1 is detected to the temperature and pressure of downhole, wherein connecting top seat 12, battery outer tube 15, circuit board outer tube 18 and shell 24 all use high temperature resistant metal material to carry out all -round integral type welding connection and are formed, and the high temperature resistant metal material can select 316L stainless steel, can maintain the shell function under the high temperature of 900-1300 degrees Celsius, effectively buffers the high temperature lithium battery 14 of top in the use through battery buffer pad 16, and pressure gauge circuit board 17, pressure gauge core body 19 and guiding pressure head 111 constitute the main circuit of measuring temperature pressure, and pressure transfer adapter 110 has different connecting mode under different conditions, when using two pressure gauge core bodies 19 work, uses pressure transfer adapter 110 and connects two pressure gauge core bodies 19 simultaneously, if only uses one pressure gauge core body 19, then pressure transfer adapter 110 can not use, under the high temperature of shell, in order to make the function of device also can work normally under high temperature environment, the utility model uses high temperature lithium battery 14, and the high temperature lithium battery is a kind of high temperature resistant lithium battery, can resist the high temperature above 150 degrees Celsius, by the heat absorption effect of shell, battery can work normally in downhole high temperature environment, provides safe and stable electric energy for device, and simultaneously buffers with top through vibration buffer pad 13, and conductive needle 11 can play the role of conduction, by the shell of high temperature resistance, connecting top seat, battery outer tube and circuit board outer tube make the shell of pressure test device can work in the high temperature environment of several hundred degrees, much higher than the prior art resistant 150 degrees high temperature, and in high temperature environment, by high temperature lithium battery, the circuit system of storage type pressure test device is provided with stable electric energy, prolongs the service life of device.

[0036] The ground reading mechanism 2 includes a shell 24, an inner steel ball holder 25 is fixedly connected to the inner wall of the shell 24, a top circuit board 26 for connecting the conductive needle 11 is fixedly connected to the top end of the inner steel ball holder 25, a protective sleeve 27 is fixedly connected to the top end of the shell 24, a USB connecting line 28 is fixedly connected to the top end of the protective sleeve 27, and the USB connecting line 28 and the top circuit board 26 are fixedly connected through wires, a check ring 211 is fixedly connected to the bottom end of the shell 24, the ground reading mechanism 2 further includes a limiting steel ring 210 fixedly connected inside the inner steel ball holder 25, a steel ball 29 is slidingly connected inside the limiting steel ring 210, a loss-preventing chain 23 is fixedly connected to the side end of the shell 24, a connecting seat 22 is rotatably connected to the side end of the loss-preventing chain 23, and a rubber dustproof plug 21 for dust prevention is fixedly connected to the bottom end of the connecting seat 22.

[0037] The reading function can be realized by the ground reading mechanism 2 at the top. Before the working process, the working condition of the monitoring device is monitored to ensure that the device can work normally. The ground reading mechanism 2, the downhole high-temperature-resistant storage pressure gauge 1 and some connecting gaps are integrally welded by the integral welding method. The shell 24 inside the ground reading mechanism 2 can protect the whole device. The limiting steel ring 210 and the steel ball 29 on the built-in steel ball holder 25 can fix the ground reading mechanism 2 for the first time before welding. The top circuit board 26 also has a conductive needle. In order to connect and power the conductive needle 11, the protective sleeve 27 protects the USB connecting line 28 to ensure that the USB connecting line 28 and the top circuit board 26 can avoid liquid entering. During the process of not using the device, the ground reading mechanism 2 and the downhole high-temperature-resistant storage pressure gauge 1 are separated. At this time, in order to prevent the inside from being contaminated by dust, the rubber dustproof plug 21 connected by the anti-lost chain 23 and the connecting seat 22 protects the inside of the device. The internal structure of the storage type downhole pressure test device is integrally welded and sealed by the way of integral welding connection. The connecting parts of the key shell also adopt the welding method to avoid the aging of the sealing rubber ring after long-term use, which leads to the decline of the sealing effect and reduces the probability of short circuit or corrosion of the internal sensor and circuit board of the device. Since the storage type downhole pressure test device needs to be used continuously in the well for more than one year, the integral welding not only does not affect the maintenance, but also enhances the service life of the device and reduces the short circuit corrosion problem of the device.

[0038] Example two

[0039] In this embodiment, since the device is long-term working in the well, a large amount of data is generated during the working process. In order to save and analyze a large amount of data, please refer to Figure 4 - Figure 7The embodiment provides a storage type downhole pressure testing system, which can not only store a large amount of downhole temperature and pressure data, but also can analyze and predict the data, the system comprises a micro processing module 3, the pressure testing system further comprises a storage module 4, a power management module 5 and an analog-digital conversion module 6, the power management module 5 is composed of a power chip and a current limiting resistor R, the EN port of the power chip is connected with the micro processing module 3, the Vin signal is input into the IN port of the power chip, the OUT port of the power chip outputs the Vout signal, the ILIM port of the power chip is grounded through the current limiting resistor R and the ground reading mechanism 2, the analog-digital conversion module 6 is composed of a pressure sensitive bridge, an analog-digital conversion chip and an RTD resistor, the pressure sensitive bridge is respectively input into the REFIN1+ port, the REFIN1- port, the AIN1+ port and the AIN1- port of the analog-digital conversion chip, the RTD resistor is input into the RTD+ port of the analog-digital conversion chip, the SPL_1 port of the analog-digital conversion chip is connected with the micro processing module 3, the storage module 4 is composed of a storage chip, the SPL_2 port of the storage chip is connected with the micro processing module 3, the model of the micro processing module 3 is STM32, the model of the storage module 4 is W25Q256, the model of the power management module 5 is TPS2553, and the model of the analog-digital conversion module 6 is AD7799.

[0040] In the working process of the system, the micro processing module 3 controls the whole system, the storage module 4 can store a large amount of measurement data, the device can be used for more than one year, the long-term and continuity of work are ensured, meanwhile, the power management module 5 can adjust the device to a low-power model according to the change of the use environment, also called sleep mode, in the sleep mode, temperature and pressure can be measured at very low power consumption, the device can work for a long time in the downhole, the analog-digital conversion module 6 can convert the pressure into an electric signal and transmit to the micro processing module 3 for analysis, in the sampling of the data, please refer to Figure 9 The collecting steps are as follows: S1, detecting whether the sleep timing time reaches or not, if not, repeating the step S1, if yes, the RTC timing terminal wakes up; S2, the analog-digital conversion module 6 and the external Flash start power-on; S3, initializing the MSC and the CDC; S4, initializing the file system; S5, mounting the file system; S6, executing single sampling; S7, opening the current file; S8, saving data to the current file; S9, closing the current file; S10, opening the external interruption, setting the RTC timing wake-up and ending.

[0041] If the host computer is used to acquire the bottom temperature and pressure data through the USB, the steps are: S1, detecting whether the USB is inserted or not; if not, repeating step S1; if yes, external interrupt wake-up; S2, the analog-to-digital conversion module 6 and the external Flash start power-on; S3, initializing the MSC and CDC; S4, initializing the file system; S5, corresponding host computer data request; S6, detecting whether the USB is pulled out or not; if not, returning to step S5; if yes, starting the external interrupt, setting the RTC timing wake-up and ending, the utility model can analyze and warn the data through the intelligent software after acquiring the data, the utility model uses the curve fitting algorithm, fits and warns the continuous variable, can generate the data curve chart while fitting and warning the continuous variable, please refer to Figure 8 , more vividly and visually displays the temperature and pressure data, so that the staff can master the downhole temperature and pressure conditions, through the synergistic effect of the storage module and the power management module, the test results can be stored in real time during the pressure detection process, and the storage time is greater than one year, so that the staff can test the downhole pressure for a long time, at the same time, the power management module of the device can intelligently adjust the model of the device, so that the device can stably operate for a long time under low power consumption, the USB connecting line is connected with the computer at the top, the downhole pressure and temperature are detected in real time, the pressure and temperature are accurately fitted and warned through the artificial intelligence model, which not only ensures the accuracy of the downhole parameter acquisition, but also can predict and warn the downhole conditions, ensuring the safety of the downhole work of the oil and gas well.

[0042] The above embodiments have been described in detail, and the principles and implementation modes of the utility model have been described by applying specific examples; the above embodiment description is only used to help understand the method and core idea of the utility model; at the same time, for the general technical personnel in the art, according to the idea of the utility model, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the utility model.

Claims

1. A stored downhole pressure testing device comprising a surface reading mechanism (2), characterised in that, The bottom of the ground reading mechanism (2) is provided with a downhole high-temperature-resistant storage pressure gauge (1) for measuring the downhole pressure of an oilfield well; The downhole high-temperature-resistant storage pressure gauge (1) comprises a connecting top seat (12) for protecting the internal circuit of the pressure testing device, a battery outer cylinder (15) and a circuit board outer cylinder (18), which are welded and connected, the top end of the circuit board outer cylinder (18) is fixedly connected with a battery buffer pad (16), the bottom end of the battery buffer pad (16) is slidably connected with a pressure gauge circuit board (17), the bottom end of the pressure gauge circuit board (17) is fixedly connected with a pressure gauge core body (19), the bottom end of the pressure gauge core body (19) is fixedly connected with a guide pressure guide head (111), and the downhole high-temperature-resistant storage pressure gauge (1) and the ground reading mechanism (2) are integrally welded and connected.

2. The pressure testing device of claim 1, wherein, The downhole high-temperature-resistant storage pressure gauge (1) further comprises a conductive needle (11) fixedly connected to the top end of the connecting top seat (12), the bottom end of the inner wall of the connecting top seat (12) is fixedly connected with a vibration buffer pad (13), and the bottom end of the vibration buffer pad (13) is fixedly connected with a high-temperature lithium battery (14) for providing electric energy to the pressure testing device.

3. The pressure testing device of claim 1, wherein, The downhole high-temperature-resistant storage pressure gauge (1) further comprises a pressure guide adapter (110) fixedly connected to the bottom end of the pressure gauge core body (19) for adding the pressure gauge core body (19).

4. The pressure testing device of claim 1, wherein, The ground reading mechanism (2) comprises a shell (24), the inner wall of the shell (24) is fixedly connected with an embedded steel ball holder (25), the top end of the embedded steel ball holder (25) is fixedly connected with a top circuit board (26) for connecting the conductive needle (11), the top end of the shell (24) is fixedly connected with a protective sleeve (27), the top end of the protective sleeve (27) is fixedly connected with a USB connecting line (28), the USB connecting line (28) and the top circuit board (26) are fixedly connected through wires, and the bottom end of the shell (24) is fixedly connected with a check ring (211).

5. The pressure testing device of claim 1, wherein, The ground reading mechanism (2) further comprises a limiting steel ring (210) fixedly connected inside the embedded steel ball holder (25), and the limiting steel ring (210) is slidably connected with a steel ball (29) inside.

6. The pressure testing device of claim 4, wherein, The shell (24) is fixedly connected with an anti-lost chain (23) at the side end, the side end of the anti-lost chain (23) is rotatably connected with a connecting seat (22), and the bottom end of the connecting seat (22) is fixedly connected with a rubber dustproof plug (21) for dust prevention.

7. A pressure testing system applied to the memory-based downhole pressure testing device according to any one of the preceding claims 1-6, comprising a microprocessor module (3), characterized in that, The pressure testing system further comprises a storage module (4), a power management module (5) and an analog-digital conversion module (6); The power management module (5) is composed of a power chip and a current limiting resistor R, the EN port of the power chip is connected with the micro-processing module (3), the Vin signal is input into the IN port of the power chip, the OUT port of the power chip outputs the Vout signal, and the ILIM port of the power chip is grounded through the current limiting resistor R; The analog-digital conversion module (6) is composed of a pressure-sensitive bridge, an analog-digital conversion chip and an RTD resistor, the pressure-sensitive bridge is connected to the REFIN1+ port, the REFIN1- port, the AIN1+ port and the AIN1- port of the analog-digital conversion chip respectively, the RTD resistor is connected to the RTD+ port of the analog-digital conversion chip, and the SPL_1 port of the analog-digital conversion chip is connected to the micro-processing module (3).

8. The pressure testing system of claim 7, wherein, The storage module (4) is composed of a storage chip, and the SPL_2 port of the storage chip is connected to the micro-processing module (3).

9. The pressure testing system of claim 7, wherein, The micro-processing module (3) is of the STM32 type, the storage module (4) is of the W25Q256 type, the power management module (5) is of the TPS2553 type, and the analog-digital conversion module (6) is of the AD7799 type.

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