CN-121984530-A - Offshore underground high-frequency wireless communication device

CN121984530ACN 121984530 ACN121984530 ACN 121984530ACN-121984530-A

Abstract

The invention relates to an offshore underground high-frequency wireless communication device which comprises a transmitting unit and a receiving unit, wherein the transmitting unit comprises a transmitting main control module, a transmitting circuit and a transmitting coil, the receiving unit comprises a receiving coil, a receiving circuit and a receiving main control module, the transmitting main control module controls the transmitting circuit to start and stop as required and output a coded modulation signal, the transmitting circuit drives the coded modulation signal in a push-pull manner and carries out resonance treatment and then loads the coded modulation signal to the transmitting coil to generate an alternating magnetic field, the receiving coil senses the signal of the alternating magnetic field and outputs a sensing signal, the receiving circuit amplifies, filters and shapes the sensing signal and then outputs a sampling signal, and the receiving main control module demodulates and processes the sampling signal to obtain a wireless receiving signal. The invention solves the problem that the data transmission between two pup joints can be realized only by the traditional integrated manufacture or mutual communication, and also solves the problem that the circuit has short working duration under the condition of battery power supply, thereby ensuring the reliable transmission of underground data.

Inventors

LI JIZHI
GUAN LIJUN
HE ZEJUN

Assignees

中海石油(中国)有限公司深圳分公司
中海石油深海开发有限公司

Dates

Publication Date: 20260505
Application Date: 20260119

Claims (10)

1. The marine underground high-frequency wireless communication device is characterized by comprising a transmitting unit and a receiving unit, wherein the transmitting unit comprises a transmitting main control module, a transmitting circuit and a transmitting coil; the transmitting main control module, the transmitting circuit and the transmitting coil are sequentially connected; the receiving coil, the receiving circuit and the receiving main control module are sequentially connected; The transmitting main control module is used for controlling the transmitting circuit to start and stop according to the need, wake up at fixed time and read data of an external sensor, and outputting a coded modulation signal to the transmitting circuit based on the data of the external sensor; the receiving coil is used for sensing signals of the alternating magnetic field and outputting corresponding sensing signals to the receiving circuit, the receiving circuit is used for amplifying, filtering and shaping the sensing signals and then outputting sampling signals to the receiving main control module, and the receiving main control module is used for demodulating and processing the sampling signals to obtain wireless receiving signals.
2. The offshore downhole high frequency wireless communication device of claim 1, wherein the transmitting circuit comprises a push-pull driving circuit, a signal transformer and a resonant circuit; The push-pull driving circuit, the signal transformer and the resonant circuit are sequentially connected, the input end of the push-pull driving circuit is connected with the transmitting main control module, and the output end of the resonant circuit is connected with the transmitting coil; The push-pull driving circuit is used for amplifying the voltage of the coded modulation signal and outputting a high-current alternating signal to the signal transformer, and a secondary side winding of the signal transformer, the resonant circuit and the transmitting coil form an LC resonant circuit so as to generate the alternating magnetic block according to a set working frequency.
3. The device of claim 2, wherein the push-pull driving circuit comprises a first blocking capacitor, a second blocking capacitor, a first current limiting resistor, a second current limiting resistor, a first driving transistor, a second driving transistor, a first output MOS transistor and a second output MOS transistor, wherein the resonant circuit comprises a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; The base electrode of the first driving transistor is connected with the first output end of the emission main control module sequentially through the first current limiting resistor and the first blocking capacitor, the base electrode of the second driving transistor is connected with the second output end of the emission main control module sequentially through the second current limiting resistor and the second blocking capacitor, the collector electrode of the first driving transistor is connected with the grid electrode of the first output MOS transistor, the emitter electrode of the first driving transistor is grounded, the collector electrode of the second driving transistor is connected with the grid electrode of the second output MOS transistor, the emitter electrode of the second driving transistor is grounded, the source electrode of the first output MOS transistor is grounded, the drain electrode of the first output MOS transistor is connected with the first input end of the primary side winding of the signal transformer, the source electrode of the second output MOS transistor is grounded, and the drain electrode of the second output MOS transistor is connected with the second input end of the primary side winding of the signal transformer; The first end of the first capacitor is connected with the first output end of the secondary side winding of the signal transformer, the second end of the first capacitor is connected with the second output end of the secondary side winding of the signal transformer, the second capacitor, the third capacitor and the fourth capacitor are sequentially connected with the first capacitor in parallel, the first end of the fourth capacitor is connected with the first end of the transmitting coil, and the second end of the fourth capacitor is connected with the second end of the transmitting coil.
4. The offshore downhole high-frequency wireless communication device according to claim 1, wherein the transmitting main control module comprises a transmitting main control unit and a transmitting power supply management module, wherein the transmitting power supply management module is respectively connected with the transmitting main control unit, the transmitting circuit and the first battery; the transmitting main control unit is used for controlling the transmitting circuit to start and stop according to the requirement, wake up at fixed time and read the data of the external sensor, and outputting a code modulation signal to the transmitting circuit based on the data of the external sensor; the transmitting power supply management module is used for providing electric energy or cutting off power supply according to the control of the transmitting main control unit.
5. The offshore downhole high-frequency wireless communication device according to claim 4, wherein the transmitting main control unit comprises a first main control MCU and a first FPGA module, and the transmitting power management module comprises a transmitting power switch circuit, a first transmitting switch circuit, a second transmitting switch circuit and a third transmitting switch circuit; the first main control MCU is connected with the first FPGA module, the emission power switch circuit is respectively connected with the first main control MCU, the second emission switch circuit, the third emission switch circuit and the first battery, the first emission switch circuit is respectively connected with the first battery and the first main control MCU, the second emission switch circuit is connected with the emission circuit, and the third emission switch circuit and the emission power switch circuit are connected with the first FPGA module; The first main control MCU is used for controlling the transmitting circuit to start and stop according to the requirement, wake up at fixed time and read the data of the external sensor, and transmitting an input signal to the first FPGA module based on the data of the external sensor; The transmitting power supply switch circuit is used for controlling the power supply on-off of the second transmitting switch circuit and the third transmitting switch circuit according to the control signal of the first main control MUC and supplying power to the first FPGA module, the first transmitting switch circuit is used for supplying power to the first main control MCU, the second transmitting switch circuit is used for supplying power to the transmitting circuit, and the third transmitting switch circuit is used for supplying power to the first FPGA module.
6. The offshore downhole high-frequency wireless communication device of claim 5, wherein the transmitting power switch circuit comprises a thirty-first resistor, a fifth triode, a sixth MOS tube and a seventh MOS tube, wherein the first transmitting switch circuit comprises a first conversion chip, the second transmitting switch circuit comprises a second conversion chip, and the third transmitting switch circuit comprises a third conversion chip; The base electrode of the fifth triode is connected with the first main control MCU through the thirty-first resistor, the emitting electrode of the fifth triode is grounded, the collecting electrode of the fifth triode is connected with the first battery through the twenty-eighth resistor, the collecting electrode of the fifth triode is also respectively connected with the grid electrode of the sixth MOS tube and the grid electrode of the seventh MOS tube, the source electrode of the sixth MOS tube is connected with the first battery, and the drain electrode of the sixth MOS tube is connected with the power supply input end of the second conversion chip and the power supply input end of the third conversion chip; The source electrode of the seventh MOS tube is connected with the power supply output end of the first conversion chip, the drain electrode of the seventh MOS tube is connected with the first FPGA module, the power supply input end of the first conversion chip is connected with the first battery, the power supply output end of the second conversion chip is connected with the transmitting circuit, and the power supply output end of the third conversion chip is connected with the first FPGA module.
7. The device of claim 1, wherein the receiving circuit comprises a first stage amplifying circuit, a second stage amplifying circuit, a first stage filtering circuit, a second stage filtering circuit, a third stage amplifying circuit and a shaping circuit; The first-stage amplifying circuit, the second-stage amplifying circuit, the first-stage filtering circuit, the second-stage filtering circuit, the third-stage amplifying circuit and the shaping circuit are sequentially connected between the receiving coil and the receiving main control module; The first-stage amplifying circuit is used for carrying out inverse amplification on the induction signals output by the receiving coil; the second-stage amplifying circuit is used for carrying out secondary amplification on the signal subjected to the inverse amplification by the first-stage amplifying circuit; the first stage filter circuit is used for performing low-pass filtering; the second stage filter circuit is used for performing high-pass filtering; the third-stage amplifying circuit is used for amplifying the signal filtered by the second-stage filtering circuit; The shaping circuit is used for shaping the signal amplified by the third-stage amplifying circuit to obtain the sampling signal.
8. The offshore downhole high-frequency wireless communication device according to claim 1, wherein the receiving main control module comprises a receiving main control unit and a receiving power supply management module, wherein the receiving power supply management module is respectively connected with the receiving main control unit, the receiving circuit and a second battery; the receiving main control unit is used for demodulating and processing the sampling signals to obtain wireless receiving signals; The receiving power supply management module is used for providing electric energy or cutting off power supply according to the control of the receiving main control unit.
9. The offshore downhole high-frequency wireless communication device according to claim 8, wherein the receiving main control unit comprises a second main control MCU and a second FPGA module, and the receiving power management module comprises a receiving power switch circuit, a first receiving switch circuit, a second receiving switch circuit and a third receiving switch circuit; The second main control MCU is connected with the second FPGA module, the receiving power supply switch circuit is respectively connected with the second main control MCU, the second receiving switch circuit, the third receiving switch circuit and the second battery, the first receiving switch circuit is respectively connected with the second battery and the second main control MCU, the second receiving switch circuit is connected with the second main control MCU, and the receiving power supply switch circuit and the third receiving switch circuit are respectively connected with the second FPGA module; The second main control MCU is used for controlling the on-off state of the receiving power switch circuit, analyzing the samples and then transmitting the samples to the second FPGA module, and the second FPGA module is used for demodulating and processing the sampled signals transmitted by the second main control MCU and then outputting the wireless receiving signals; The receiving power supply switch circuit is used for controlling the power supply on-off of the second receiving switch circuit and the third receiving switch circuit according to the control signal of the second main control MCU and supplying power to the second FPGA module, the first receiving switch circuit is used for supplying power to the second main control MCU, the second receiving switch circuit is used for supplying power to an operational amplifier in the second main control MCU, and the third receiving switch circuit is used for supplying power to the second FPGA module.
10. The offshore downhole high-frequency wireless communication device according to claim 9, wherein the receiving power switch circuit comprises a twenty-seventh resistor, an eighth triode, a ninth MOS tube and a tenth MOS tube, the first receiving switch circuit comprises a fourth conversion chip, the second receiving switch circuit comprises a fifth conversion chip, and the third receiving switch circuit comprises a sixth conversion chip; The base electrode of the eighth triode is connected with the second main control MCU through the twenty-seventh resistor, the emitting electrode of the eighth triode is grounded, the collecting electrode of the eighth triode is connected with the second battery through the thirty-second resistor, the collecting electrode of the eighth triode is also respectively connected with the grid electrode of the ninth MOS tube and the grid electrode of the tenth MOS tube, the source electrode of the ninth MOS tube is connected with the second battery, and the drain electrode of the ninth MOS tube is connected with the power supply input end of the fifth conversion chip and the power supply input end of the sixth conversion chip; The source electrode of the tenth MOS tube is connected with the power supply output end of the fourth conversion chip, the drain electrode of the tenth MOS tube is connected with the second FPGA module, the power supply input end of the fourth conversion chip is connected with the second battery, the power supply output end of the fifth conversion chip is connected with the second main control MCU, and the power supply output end of the sixth conversion chip is connected with the second FPGA module.

Description

Offshore underground high-frequency wireless communication device Technical Field The invention relates to the technical field of offshore exploration, in particular to an offshore underground high-frequency wireless communication device. Background In the offshore exploration well operation process, various downhole parameters such as pressure, temperature and the like need to be acquired in real time, and data are reliably transmitted to a wellhead system. In some cases, due to environmental constraints, complex mechanical structures or some construction processes. The data acquisition tool and the data transmission tool cannot be directly interconnected. Under such conditions, it is desirable to accomplish data transfer between different tool downhole by wireless transmission. Currently, wireless communication commonly used underground has two modes, namely a low-frequency carrier and a high-frequency carrier. The low-frequency mode is long in transmission distance, high in power consumption and suitable for long-distance low-data-volume application. The high-frequency communication method is short in communication distance, low in power consumption and suitable for application of short-distance large data volume, therefore, comprehensive reliability and endurance time are achieved, mature technology is not applied in the aspect of underground data transmission in the process of offshore exploratory well stratum testing operation, for example, for data transmission between a measuring nipple and a communication nipple, the traditional scheme is that data transmission between the two nipples can be achieved through integral manufacturing or mutual communication, and in addition, for underground circuits, the circuit operation endurance time is short under the condition of battery power supply, and reliable transmission of underground data cannot be guaranteed. Disclosure of Invention The invention aims to solve the technical problem of the prior art and provides an offshore underground high-frequency wireless communication device. The technical scheme adopted by the invention for solving the technical problems is that an offshore downhole high-frequency wireless communication device is constructed and comprises a transmitting unit and a receiving unit, wherein the transmitting unit comprises a transmitting main control module, a transmitting circuit and a transmitting coil; the transmitting main control module, the transmitting circuit and the transmitting coil are sequentially connected; the receiving coil, the receiving circuit and the receiving main control module are sequentially connected; The transmitting main control module is used for controlling the transmitting circuit to start and stop according to the need, wake up at fixed time and read data of an external sensor, and outputting a coded modulation signal to the transmitting circuit based on the data of the external sensor; the receiving coil is used for sensing signals of the alternating magnetic field and outputting corresponding sensing signals to the receiving circuit, the receiving circuit is used for amplifying, filtering and shaping the sensing signals and then outputting sampling signals to the receiving main control module, and the receiving main control module is used for demodulating and processing the sampling signals to obtain wireless receiving signals. In the offshore downhole high-frequency wireless communication device, the transmitting circuit comprises a push-pull driving circuit, a signal transformer and a resonant circuit; The push-pull driving circuit, the signal transformer and the resonant circuit are sequentially connected, the input end of the push-pull driving circuit is connected with the transmitting main control module, and the output end of the resonant circuit is connected with the transmitting coil; The push-pull driving circuit is used for amplifying the voltage of the coded modulation signal and outputting a high-current alternating signal to the signal transformer, and a secondary side winding of the signal transformer, the resonant circuit and the transmitting coil form an LC resonant circuit so as to generate the alternating magnetic block according to a set working frequency. The push-pull driving circuit comprises a first blocking capacitor, a second blocking capacitor, a first current limiting resistor, a second current limiting resistor, a first driving transistor, a second driving transistor, a first output MOS tube and a second output MOS tube, wherein the resonant circuit comprises a first capacitor, a second capacitor, a third capacitor and a fourth capacitor; The base electrode of the first driving transistor is connected with the first output end of the emission main control module sequentially through the first current limiting resistor and the first blocking capacitor, the base electrode of the second driving transistor is connected with the second output end of the emission main control module