CN111622742B - Fluid self-power generation parameter detection and communication system - Google Patents
Fluid self-power generation parameter detection and communication system Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
- E21B41/0085—Adaptations of electric power generating means for use in boreholes
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- E—FIXED CONSTRUCTIONS
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/14—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling using acoustic waves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
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- F05B2220/00—Application
- F05B2220/70—Application in combination with
- F05B2220/706—Application in combination with an electrical generator
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a fluid self-power generation parameter detection and communication system, which comprises an underground power generation and detection device and an underground data receiving device. The underground power generation and detection device is arranged at the bottom of the oil well pump and used for detecting parameters of underground fluid and realizing self power supply, and comprises a mechanical part and a hardware circuit part. The data receiving device comprises a hardware part and an algorithm part. The method specifically comprises the following steps: in the upstroke of the oil-well pump, electric energy is generated through the power generation and detection device, and is directly supplied to components on the circuit board after being processed by the power supply module, and the components are charged and stored. In the downstroke of the oil pump, the energy storage module supplies power to components on the circuit board, so that continuous electric energy supply is ensured. The detection module and the communication module on the circuit board collect, process and convert the underground flow, pressure and temperature information into sound waves for transmission under the control of the singlechip, and the sound waves carrying the underground information are transmitted to the underground receiving device along the oil pipe for data receiving and analyzing.
Description
Technical Field
The invention relates to the technical field of underground detection of oil fields, in particular to a fluid self-power generation parameter detection and communication system.
Background
With the rapid development of petroleum resource exploration and exploitation in China, the dynamic monitoring of a production well is particularly important. In the exploitation of a production well, the system can provide sufficient electric quantity supply for underground measuring instruments and control tools, and can accurately and timely master important parameters such as underground temperature, pressure and the like. However, the existing underground measuring instrument is usually powered by a battery with limited capacity, and the current underground measuring instrument is easy to be influenced by environment and has small battery capacity, so that the requirement of the measuring instrument on long-term work cannot be met. Frequent battery replacement or charging also severely affects the operating efficiency and adds additional cost. And the downhole maximum temperature of part of the oil well reaches 240 ℃, the temperature also increases along with the increase of the depth of the oil well, the temperature of the oil well exceeds the maximum temperature resistance of the battery, and a great number of accident risks are brought in the use process. Therefore, in the prior art, the slurry generator is adopted for power supply, but the slurry generator has the defects that the output electric energy is not stable enough, the voltage output by the generator is regulated by utilizing the voltage stabilizing module, the whole power supply system can stop working due to the damage of components in the module, and the underground power generation system is very complex and has high maintenance difficulty. In addition, in the aspect of data real-time monitoring, a cable is mainly adopted, but the cable is frequently broken, so that underground data measurement fails, and the problems of poor universality and overhigh cost are solved. The mud pulse transmission is adopted to carry out detection data transmission, but when the drilling circulation fluid medium is changed into gas or gas-liquid two-phase fluid, the drilling fluid pulse can not carry out data transmission, and has certain limitation; or electromagnetic wave transmission is adopted, but is easily influenced by electrical equipment at well sites and formation resistivity, and great difficulty is brought to transmission and reception of downhole data.
Aiming at the prior art problems and problems, the invention provides a fluid self-power generation parameter detection and communication system based on the research of the prior downhole generator, thereby solving the technical problems of downhole power supply and real-time monitoring of data, having certain reference value for the research of downhole generator and downhole data real-time detection dynamically monitored in a production well in China, making up the gap of the research to a certain extent, being beneficial to breaking the monopoly of the technology in the field outside the country in the morning in China and realizing the autonomy in technology.
Disclosure of Invention
The invention provides a fluid self-power generation parameter detection and communication system, which aims to solve the problems of various defects in the prior art. The method comprises the following steps:
a fluid self-generating parameter detection and communication system, the system comprising:
the underground power generation and detection device is arranged at the bottom of the oil well pump; and
an uphole data receiving device installed at the wellhead of the well;
wherein the downhole power generation and detection apparatus comprises:
a screen for filtering crude oil;
a turbine flowmeter connected to the end of the screen pipe for measuring the flow rate of crude oil flowing through the turbine flowmeter;
a drive gear fixedly connected with the shaft of the turbine flowmeter;
the rotor shaft of the generator is fixedly connected with the output shaft of the transmission gear, the generator is driven by the transmission gear to rotate for generating electricity, and the generator is arranged in a motor sheath;
a circuit sheath connected with the motor sheath; and
a circuit portion disposed within a circuit jacket, comprising:
the power supply circuit is electrically connected with the electric energy output end of the generator and is used for supplying power to the circuit part;
the detection module is used for at least collecting downhole flow, pressure and temperature information;
the sound wave communication module is used for converting the data needing to be output into sound waves and transmitting the sound waves to the uphole data receiving device through the oil pipe; and
the control module is used for controlling the power module, the energy storage module, the detection module and the acoustic wave communication module to work, processing information output by the detection module and the turbine flowmeter and outputting data to be output through the acoustic wave communication module;
the above-well data receiving device is used for analyzing and outputting the received sound waves.
The screen pipe is long cylinder, including inside circular barrel form stainless steel pipe, and outside filter screen.
The Hall sensor is arranged on the inner side of the motor sheath and is close to the rotor shaft of the generator; a magnet is arranged on a rotor shaft of the generator; the Hall sensor is electrically connected with the control module.
The circuit part also comprises a serial port communication module; the fluid self-power generation parameter detection and communication system can be connected with the PC end through the serial port communication module.
The power supply circuit includes:
the power module is used for receiving and processing the electric energy output by the generator and supplying power to other parts of the circuit part which need electric energy in the upstroke of the oil well pump;
and the energy storage module is used for storing the electric energy output by the power supply module and supplying power to other parts of the circuit part which need electric energy in the downstroke of the oil well pump.
Preferably, during the upstroke of the oil-well pump, the crude oil in the well flows upwards to enter the underground power generation and detection device, sand particles doped in the crude oil are filtered through the sieve tube, the crude oil continuously flows upwards through the turbine flowmeter, so that the turbine flowmeter shaft is driven to rotate, the generator rotor is driven to rotate through gear transmission, voltage is generated, and the voltage is transferred into the secondary voltage stabilization through the primary voltage stabilization circuit, and the voltage is stored. And in the downstroke of the oil pump, the voltage energy storage is used as a load power supply.
Preferably, the calculation formula of the wall thickness of the motor sheath and the circuit sheath is as follows:
Further, the fluid parameters include: flow, temperature and pressure information downhole, the detection module comprising:
flow detection circuit: the device comprises a Hall element, a voltage comparator and a counter, wherein the Hall element acquires Hall voltage and is shaped into square waves through the voltage comparator, and the counter counts pulse signals of the square waves;
pressure detection circuit: the voltage value obtained by the pressure sensor is amplified by the operational amplifier, and the obtained output voltage is filtered and then sent to the main control unit;
temperature detection circuit: the temperature sensor comprises a temperature sensor and an operational amplifier, and a resistance bridge temperature measuring circuit formed by the temperature sensor; and the voltage difference value in the resistance bridge temperature measuring circuit is transmitted to the main control unit after being subjected to operational amplifier and filtering.
Further, the control module is further provided with an operation program for controlling the system, including: a CPU main program, a timer interrupt program, a signal detection program, preferably, the CPU main program: the system comprises a PC end, a data acquisition processing program, a downhole acoustic communication program and a data processing program, wherein the data acquisition processing program is used for acquiring fluid parameters detected by the data acquisition processing program and transmitting the fluid parameters to the PC end through the downhole acoustic communication program;
the data acquisition processing program comprises the following steps: collecting and processing downhole fluid parameters through the detection module;
the downhole acoustic communication program: the system comprises a sound wave transmitting module, a PC end, a sound wave receiving module and a communication module, wherein the sound wave transmitting module is used for transmitting the acquired downhole fluid parameters to the PC end;
a timed interrupt program: the system comprises a data acquisition processing program, a downhole acoustic communication program and a control program, wherein the data acquisition processing program is used for controlling the execution frequency of the data acquisition processing program and the downhole acoustic communication program;
serial port communication program: and the data of the circuit part is sent to the PC side serial port assistant in the debugging process of the system program.
Further, the executing step of the running program includes:
s1: initializing setting and starting a timing interrupt program of a system;
s2: judging whether program debugging is needed, if so, sending debugging data to a PC (personal computer) side serial port assistant by the CPU main program through the serial port communication circuit, and manually judging whether the main control unit is in a normal running state or not until the debugging is successful, and then switching to S3; if not, directly switching to S3;
s3: waiting for the arrival of a timed interrupt; when the timed interrupt arrives, executing a timed interrupt service function in a timed interrupt program, and sequentially executing a data acquisition processing program and a downhole acoustic wave communication program in the timed interrupt service function to acquire, process and send downhole flow, pressure and temperature; and after the program is run, jumping out of the timing interrupt service function, waiting for the arrival of the next timing interrupt, and executing circularly according to the sequence.
The calculation formula of the temperature is as follows:
the calculation formula of the pressure is as follows:
wherein KT is the relationship between temperature and voltage, KP is the relationship between pressure and voltage, K is the voltage amplification factor, vref is the reference voltage, N is the AD conversion precision, and V is the value stored in a conversion storage register after AD acquisition;
the flow calculation formula is as follows:
Further, the above-well data receiving device includes:
an acceleration sensor for converting a received acoustic wave signal into an electrical signal;
a signal conditioner for amplifying the electrical signal;
the data acquisition card is used for converting the analog signals output by the signal conditioner into digital signals;
a processor having an acoustic signal extraction algorithm for denoising and demodulating the digital signal; the denoising is used for filtering noise and extracting useful sound wave signals; demodulation is used to resolve the information contained in the acoustic signal.
The circuit part of the hardware circuit part of the underground device comprises a CPU main control circuit, a serial port communication circuit, a signal detection circuit, an acoustic wave transmitting circuit and a power supply circuit. The CPU main control circuit controls the serial port circuit, the signal detection and the sound wave emission circuit, so that the serial port circuit, the signal detection and the sound wave emission circuit can be safely and orderly executed. The serial communication circuit is used for enabling the circuit to communicate with the PC upper computer, and comprises program downloading and serial communication. The signal detection circuit is responsible for collecting the flow, temperature and pressure in the pit. The sound wave transmitting circuit is used for transmitting the collected underground data through sound waves. The power supply circuit is used for storing and converting the electric energy generated by the motor and providing electric energy for the whole circuit.
The algorithm part of the above-well receiving device is mainly characterized in that: the algorithm can screen out the acoustic wave signals with noise from the received acoustic wave signals in a preset frequency domain range, and after the acoustic wave signals are amplified and abnormal signals are removed, targeted filtering and denoising processing is carried out on the acoustic wave according to the underground noise environment, and finally effective acoustic wave signals are filtered out, so that the acoustic wave signal information is displayed on a PC end through demodulation processing. The demodulation of the signal not only recovers the message from the modulated acoustic signal carrying the information, but also recovers the message transmitted by the underground acoustic signal by the demodulation algorithm and utilizes the message, finally realizes the display of the data on the PC end and judges various parameters of the current site.
In summary, the invention provides a fluid self-generating parameter detection and communication system, which is provided with a generating part for providing stable and continuous electric energy supply for underground instruments in complex environments such as underground designated depth, temperature, high pressure, corrosion and the like, and a circuit part for detecting underground flow, temperature and pressure information and transmitting the information to a ground receiving end by utilizing sound waves so as to realize real-time monitoring of underground data. Therefore, the problem of power supply and the detection difficulty in the prior art are solved, sustainable power supply is realized, and in combination with the up-and-down stroke of an oil pump, when the up-stroke is effectively utilized, crude oil in the pit flows through a pushing power generation structure from the inside of the device to convert kinetic energy of the crude oil into electric energy, the kinetic energy is used for supplying power to components on a circuit board and storing energy through an energy storage module, and when the down-stroke is performed, the power supply is completed through the energy storage module, so that stable and continuous power supply is ensured, and the cost and various defects of a storage battery are greatly saved.
Drawings
FIG. 1 is a schematic diagram of an example fluid self-generating parameter detection and communication system.
FIG. 2 is a schematic diagram of an example downhole power generation and detection apparatus.
FIG. 3 is a flow chart of an example fluid self-generating parameter detection and communication system.
Detailed Description
A fluid self-generating parameter detection and communication system according to the present invention will be described in further detail with reference to the following embodiments and the accompanying drawings.
As shown in fig. 1, the fluid self-power generation parameter detection and communication device is installed underground when working normally, and the installation position is at the bottom of the oil pump. On the upstroke of the oil pump, the crude oil in the well flows through the pushing power generation part from the inside of the device to convert the kinetic energy of the crude oil into electric energy. The generated electric energy is processed by a power module of a circuit board arranged in the device and then directly supplies power to components on the circuit board, and meanwhile, the electric energy is charged and stored. In the downstroke of the oil-well pump, crude oil can not push the device to generate power, and the energy storage module continues to supply power for components on the circuit board, so that continuous electric energy supply is ensured. Meanwhile, the detection module and the communication module on the circuit board collect, process and convert the underground flow, pressure and temperature information into sound waves for transmission under the control of the singlechip, the sound waves carrying the underground information are transmitted to an uphole receiving end along an oil pipe, and the receiving end receives and analyzes data. The other end of the oil pump is connected with the ground engine through a sleeve and an oil pipe. The working process of the fluid self-power generation parameter detection and communication system further comprises the following steps: the power generated by the generator can be used for supplying power and storing energy through the modulation module and the energy converter, and is transmitted to the energy converter at the PC end through oil pipe sound waves, and then the sound wave signal extraction algorithm module screens out sound wave signals in a preset frequency domain range from the received sound wave signals with noise, abnormal signals are removed after amplification, filtering and denoising processing is carried out on the sound waves according to the underground noise environment, effective sound wave signals are obtained, and then through demodulation processing, sound wave signal information is displayed on the PC end. One end of the oil pump is connected with the fluid self-generating parameter detection and communication device, and the other end of the oil pump is connected with an uphole device through an oil pipe and a sleeve.
FIG. 2 is a schematic diagram of an example downhole device of a fluid self-generating parameter sensing and communication system, wherein a 1-screen; 2-turbine flowmeter; 3-a transmission gear; a 4-hall sensor; a 5-generator; 6-a motor sheath; 7-circuit sheath. The device is arranged at the bottom of the oil well pump and comprises a power generation part and a circuit part, wherein the power generation part comprises a sieve tube, a turbine flowmeter, a transmission gear, a Hall sensor and a generator; the periphery of the generator is provided with a motor sheath, and a sealing space is formed between the motor sheath and the circuit sheath at the periphery of the circuit part; the Hall sensor is arranged on the inner side surface of the motor sheath and close to the rotor shaft of the generator; the circuit part is used for detecting fluid parameters, one end of the circuit part is connected with the generator, the other end of the circuit part is connected with the PC end through a serial communication circuit, and the circuit part also comprises a main control unit, a detection module, an acoustic wave emission module and a power supply module, wherein the detection module, the acoustic wave emission module and the power supply module are electrically connected with the main control unit; the power generation part generates electric energy to supply power to the circuit part during the upward stroke of the oil pump, and simultaneously stores energy through the power module, and the energy stored in the power module supplies power to the circuit part during the downward stroke of the oil pump.
Wherein, the device top is provided with the pipe screw thread for install in the oil-well pump bottom.
Because the underground crude oil contains a large amount of sand grains, if the sand grains enter the device, the sand grains can directly cause the flow meter to stop rotating, so that the whole device stops working, the invention adopts the screen pipe, which is preferably designed into a long cylindrical shape, thereby meeting the space limitation of the device and ensuring sufficient filtering area, and also comprises an internal circular barrel-shaped stainless steel pipe and an external filter screen. The stainless steel tube can effectively support the filter screen to improve the mechanical strength of the screen pipe, and can bear the underground high-pressure environment. The screen density is designed to be 50 mesh, depending on the maximum sand that the flowmeter will allow to pass through, to ensure adequate filtering of the sand downhole. The filter screen material is preferably 304 stainless steel mesh to ensure the corrosion resistance of the filter screen and prolong the service life of the screen pipe.
In addition, because the device needs to bear a certain high-pressure environment when working underground, the circuit sheath and the motor sheath together enclose a sealed space, and are mainly used for placing circuit parts such as a motor, a circuit board and some detection components, thereby providing good environment and space for the normal operation of each electronic component, being isolated from the external environment, ensuring that various electronic components are not corroded, prolonging the service life of the electronic components and the effectiveness of data detection of the electronic components. Preferably, the sealing space is set to bear the pressure of at least 30MPa, and the sealing performance is good, and the thicknesses of the motor sheath and the circuit sheath tube wall can be determined by the following formula:
in the method, in the process of the invention,
is the thickness of the wall of the motor sheath and the circuit sheath, P is the internal and external pressure difference of 30MPa of the wall of the sheath, D is the diameter of the sheath, S is the pressure coefficient of the steel pipe, and when the pressure P is>At 17.5MPa, the pressure coefficient S is 4,
the steel pipe is preferably made of 304 stainless steel, and the tensile strength is 520. Obtained by calculation
6.9, to ensure that the mechanism has enough mechanical strengthThe invention designs the pipe wall thickness of the motor sheath and the circuit sheath to 7.5mm, and the thickness of other steel pipes in the structure should be at least designed to be more than 5mm under the condition of sufficient environment space.
Preferably, the generator rotor is sealed by adopting a rotary sealing ring, the joint of the motor sheath and the circuit sheath is sealed, the two sheaths are connected through threads, and two sealing rings are designed at the tail end positions of the threads for ensuring the sealing. The sealing ring is a fluororubber O-shaped ring, the high temperature resistance is better than that of silicon rubber, and the preferable use temperature range is-20-250 ℃. In order to further ensure the tightness, 706 silicon rubber is used for sealing and packaging at the thread, and meanwhile, the anti-vibration function can be achieved.
Referring to fig. 3, a flow chart of a fluid self-generating parameter detection and communication system is shown, wherein a main program of a CPU is a core part of software, and the main function is to control the whole program and schedule tasks, so as to ensure safe, orderly and normal operation of the whole software system. The main function of the data acquisition and processing program is to acquire and primarily process the information of underground flow, temperature and pressure. The main function of the downhole acoustic communication program is to assemble downhole flow, temperature and pressure information into frames according to a certain communication protocol and transmit the information through acoustic waves. The main function of the timer interrupt routine is to determine the execution frequency of the data acquisition and processing routine and the downhole acoustic communication routine. The main function of the serial communication program is to send some data to the serial assistant of the upper computer through the serial port in the debugging process of the circuit board and the system program so as to be convenient for debugging the circuit board and the system program.
Preferably, the operation steps of the CPU main control program are as follows: the initialization setting of the system is performed on the program first, including setting of related variables and hardware drivers, and then the timer interrupt of the system is started. In the debugging stage of the program, if the program needs to be debugged, the main program executes the serial communication program to send related data to the upper computer serial assistant and waits for the arrival of the timed interrupt. When the timed interrupt arrives, the program executes the timed interrupt service function, and sequentially executes the data acquisition and processing program and the underground sound wave communication program in the interrupt service function to complete acquisition, processing and sending of underground flow, pressure and temperature. And after the program is run, jumping out of the timing interrupt service function, waiting for the arrival of the next timing interrupt, and executing circularly according to the sequence.
Preferably, the data acquisition and processing program is mainly responsible for completing the measurement and preliminary processing of the downhole flow, temperature and pressure. The underground temperature and pressure are collected through an AD module of the singlechip, and the underground flow is collected through 8-bit parallel GPIO pins of the singlechip.
Preferably, the detection module includes:
flow detection circuit: the device comprises a Hall element, a voltage comparator and a counter, wherein the Hall element acquires Hall voltage and is shaped into square waves through the voltage comparator, and the counter counts pulse signals of the square waves;
pressure detection circuit: the voltage value obtained by the pressure sensor is amplified by the operational amplifier, and the obtained output voltage is filtered and then sent to the main control unit;
temperature detection circuit: the temperature sensor comprises a temperature sensor and an operational amplifier, and a resistance bridge temperature measuring circuit formed by the temperature sensor; and the voltage difference value in the resistance bridge temperature measuring circuit is transmitted to the main control unit after being subjected to operational amplifier and filtering.
Further, the system operation steps specifically include:
s1: initializing setting and starting a timing interrupt program of a system;
s2: judging whether program debugging is needed, if so, sending debugging data to a PC (personal computer) side serial port assistant by the CPU main program through the serial port communication circuit, and manually judging whether the main control unit is in a normal running state or not until the debugging is successful, and then switching to S3; if not, directly switching to S3;
s3: waiting for the arrival of a timed interrupt; when the timed interrupt arrives, executing a timed interrupt service function in a timed interrupt program, and sequentially executing a data acquisition processing program and a downhole acoustic wave communication program in the timed interrupt service function to acquire, process and send downhole flow, pressure and temperature; and after the program is run, jumping out of the timing interrupt service function, waiting for the arrival of the next timing interrupt, and executing circularly according to the sequence.
Wherein, the calculation formula of the temperature is:
the calculation formula of the pressure is as follows:
wherein K is T Is the relation between temperature and voltage, K P Is the relation between pressure and voltage, K is the voltage amplification factor, V ref Is the reference voltage, N is the AD conversion precision, and V is the value stored in the conversion storage register after AD acquisition.
The flow calculation formula is as follows:
In summary, the fluid self-power generation parameter detection and communication system provided by the invention is arranged at the bottom of an oil pump and used for detecting parameters of underground fluid, and comprises a power generation part and a circuit part, wherein the power generation part generates electric energy to supply power to the circuit part when the oil pump is in an up stroke, and simultaneously stores energy through the power supply module, and the energy stored in the power supply module supplies power to the circuit part when the oil pump is in a down stroke. The problems of unstable power supply, high cost and the like in the prior art are solved, the self-generating and self-powered effect is realized by utilizing the self-motion of the oil pump, the power supply problem is effectively solved, the traditional power supply mode is replaced, and the operation cost is reduced. And combining with the requirement of the underground operation environment, a motor sheath and a circuit sheath meeting the requirements of high pressure resistance and strong sealing property are arranged on a hardware part of the device, so that the protection is provided for the normal use of an internal circuit and electronic components thereof, the normal operation of the circuit part is ensured, the parameters such as temperature, pressure, flow and the like within the error range meeting the requirement of the process design are provided, the accuracy and reliability of fluid parameters are ensured, and the technical level of underground operation is greatly improved.
While the invention has been described in conjunction with the specific embodiments above, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, all such alternatives, modifications, and variations are included within the spirit and scope of the following claims.
Claims (9)
1. A fluid self-generating parameter detection and communication system, the system comprising:
the underground power generation and detection device is arranged at the bottom of the oil well pump; and
an uphole data receiving device installed at the wellhead of the well;
the downhole power generation and detection apparatus includes:
a screen for filtering crude oil;
a turbine flowmeter connected to the end of the screen pipe for measuring the flow rate of crude oil flowing through the turbine flowmeter;
a drive gear fixedly connected with the shaft of the turbine flowmeter;
the rotor shaft of the generator is fixedly connected with the output shaft of the transmission gear, the transmission gear drives the rotor shaft to rotate to generate electricity, and the generator is arranged in a motor sheath;
a circuit sheath connected with the motor sheath; and
a circuit portion disposed within a circuit jacket, comprising:
the power supply circuit is electrically connected with the electric energy output end of the generator and is used for supplying power to the circuit part; the power supply circuit includes:
the power module is used for receiving and processing the electric energy output by the generator and supplying power to other parts of the circuit part which need electric energy in the upstroke of the oil well pump; the energy storage module is used for storing the electric energy output by the power supply module and supplying power to other parts of the circuit part which need electric energy in the downstroke of the oil pump;
the detection module is used for at least collecting downhole flow, pressure and temperature information;
the sound wave communication module is used for converting the data needing to be output into sound waves and transmitting the sound waves to the uphole data receiving device through the oil pipe; the method comprises the steps of,
the control module is used for controlling the power module, the energy storage module, the detection module and the acoustic wave communication module to work, processing information output by the detection module and the turbine flowmeter and outputting data to be output through the acoustic wave communication module;
the above-well data receiving device is used for analyzing and outputting the received sound waves.
2. The fluid self-generating parameter sensing and communication system of claim 1, wherein the screen is long cylindrical, comprising an inner circular barrel-shaped stainless steel tube, and an outer filter screen.
3. The fluid self-generating parameter detection and communication system of claim 1, further comprising a hall sensor disposed inside the motor jacket and proximate to a generator rotor shaft; a magnet is arranged on a rotor shaft of the generator; the Hall sensor is electrically connected with the control module.
4. The fluid self-generating parameter detection and communication system of claim 1, wherein the circuit portion further comprises a serial port communication module; the fluid self-power generation parameter detection and communication system can be connected with the PC end through the serial port communication module.
5. The fluid self-generating parameter detection and communication system according to claim 1, wherein the wall thickness calculation formula of the motor sheath and the circuit sheath is:
6. The fluid self-generating parameter detection and communication system of claim 1, wherein the detection module comprises:
flow detection circuit: the device comprises a Hall sensor, a voltage comparator and a counter, wherein the Hall sensor acquires Hall voltage and is shaped into square waves through the voltage comparator, and the counter counts pulse signals of the square waves;
pressure detection circuit: the voltage value obtained by the pressure sensor is amplified by the operational amplifier, and the obtained output voltage is filtered and then sent to the control module;
temperature detection circuit: the temperature sensor comprises a temperature sensor and an operational amplifier, and a resistance bridge temperature measuring circuit formed by the temperature sensor; and the voltage difference value in the resistance bridge temperature measuring circuit is transmitted to the control module after being subjected to operational amplifier and filtering.
7. The fluid self-generating parameter detection and communication system of claim 4, wherein the control module further includes an operating program for controlling the system, comprising: the CPU main program, the timing interrupt program and the signal detection program, and the execution steps of the running program comprise:
s1: initializing setting and starting a timing interrupt program of a system;
s2: judging whether program debugging is needed, if so, sending debugging data to a PC (personal computer) side serial port assistant by the CPU main program through the serial port communication module, and manually judging whether the control module is in a normal running state or not until the debugging is successful, and then switching to S3; if not, directly switching to S3;
s3: waiting for the arrival of a timed interrupt; when the timed interrupt arrives, executing a timed interrupt service function in a timed interrupt program, and sequentially executing a data acquisition processing program and a downhole acoustic wave communication program in the timed interrupt service function to acquire, process and send downhole flow, pressure and temperature; and after the program is run, jumping out of the timing interrupt service function, waiting for the arrival of the next timing interrupt, and executing circularly according to the sequence.
8. The fluid self-generating parameter detection and communication system of claim 6, wherein,
the calculation formula of the temperature is as follows:
the calculation formula of the pressure is as follows:
wherein K is T Is the relation between temperature and voltage, K P Is the relation between pressure and voltage, K is the voltage amplification factor, vref is the reference voltage, N is the AD conversion precision, and V is the value stored in a conversion storage register after AD acquisition;
the flow calculation formula is as follows:
9. The fluid self-generating parameter detection and communication system of claim 1, wherein the uphole data receiving device comprises:
an acceleration sensor for converting a received acoustic wave signal into an electrical signal;
a signal conditioner for amplifying the electrical signal;
the data acquisition card is used for converting the analog signals output by the signal conditioner into digital signals;
a processor having an acoustic signal extraction algorithm for denoising and demodulating the digital signal; the denoising is used for filtering noise and extracting useful sound wave signals; demodulation is used to resolve the information contained in the acoustic signal.
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| CN112127841B (en) * | 2020-10-23 | 2023-03-10 | 陕西昆鹏能源科技有限公司 | Intelligent power generation device for pressure difference in oil-gas well |
| CN112412401A (en) * | 2020-12-04 | 2021-02-26 | 中国石油天然气股份有限公司 | Wireless measurement-based pumping unit intermittent pumping control system and method thereof |
| CN113464125B (en) * | 2021-07-29 | 2023-03-21 | 河北中清永晟石油科技有限公司 | Wireless communication oil extraction device and wireless communication method |
| CN114142947A (en) * | 2021-11-16 | 2022-03-04 | 中国农业大学 | Self-powered underground information detection and transmission system and method based on acoustic communication |
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