Deep well sonar cavity measuring device

Abstract

The invention discloses a deep well sonar cavity measuring device, and relates to the technical field of sonar cavity measuring, the deep well sonar cavity measuring device comprises a guide head, a tilt angle sensor, a sound transmission cover, an underwater acoustic transducer, a support, a zero position monitoring sensor, a motor, a motor control module, a motor cabin joint, a control panel, a battery, a communication module, a shell, a double male joint, a watertight connector, a sealing member, a bearing, an oil seal and a screw. Based on the device provided by the invention, the deep well can be accurately and efficiently measured.

Description

Technical Field

[0001] The present application relates to the technical field of sonar cavity measurement, and in particular to a deep well sonar cavity measurement device. Background Art

[0002] In response to the demand for storage improvement in multi-branch production-increasing wells during hydrate production trials, the development of a sonar monitoring instrument for the rear jet chamber of a rotary jet was carried out to provide equipment and instrument support for the measurable and controllable production-increasing wellbore. The basic functions of the sonar monitoring instrument are direction finding and distance finding, and the target identification function is usually completed by technicians by identifying the target radiation noise. After the development of this instrument, it will be used in the wellbore storage improvement process in the hydrate layer of the hydrate production trial wells. The application depth exceeds 2000m, and the specific gravity of the measured medium drilling fluid exceeds 1.10g / cm 3 Complex working conditions such as high temperature, high pressure, and strong creep bring huge technical challenges to the measurement cavity operation. In addition to the technical condition of the sonar itself, the factors that affect the working performance of the sonar are also affected by external environmental factors such as the propagation medium, propagation attenuation, multipath effect, reverberation interference, environmental noise, self-noise, target reflection characteristics, or radiation noise intensity. For example, during the propagation of sound waves, they are affected and restricted by the uneven distribution of water / drilling fluid media, which will cause refraction, scattering, reflection, and interference, sound line bending, signal fluctuations and distortion, resulting in changes in the propagation path, and the appearance of acoustic shadow areas, which seriously affect the sonar's working distance and measurement accuracy. Therefore, there is an urgent need for a measurement device with high measurement accuracy. Summary of the invention

[0003] The purpose of this application is to provide a deep well sonar cavity measurement device, which uses sonar measurement technology to timely and effectively detect the shape and volume of the reservoir transformation cavity, and can accurately calculate the cavity shape and volume.

[0004] To achieve the above objectives, this application provides the following solutions:

[0005] In a first aspect, the present application provides a deep well sonar cavity measuring device, comprising:

[0006] Guide head, inclination sensor, sound-transmitting cover, hydroacoustic transducer, bracket, zero-position monitoring sensor, motor, motor control module, motor compartment connector, control board, battery, communication module, housing, double male connector, watertight connector, seal, bearing, oil seal and screws;

[0007] The guide head is connected to the sound-transmitting cover by bolts; an inclination sensor is installed at the bottom of the sound-transmitting cover; the two ends of the motor compartment joint are respectively connected to the sound-transmitting cover and the shell by bolts; the upper end of the shell is connected to the double male joint by bolts; the motor control module is integrated on the motor; the motor is installed in the motor compartment by screws; the bottom of the motor compartment is equipped with a bearing for straightening the motor shaft and an oil seal for dividing the sound-transmitting cover cavity and the shell cavity; the upper end of the bracket is fixed to the motor shaft by screws; the lower end of the bracket is connected to the underwater acoustic transducer; the control board, battery, and communication module are respectively installed in the shell; the watertight connector is connected to the double male joint by threads; the underwater acoustic transducer is fixed to the bracket by screws; the motor is used to drive the underwater acoustic transducer to rotate continuously; the zero position monitoring sensor is installed on the sound-transmitting cover, and is used to calibrate the zero position and rotation direction of the underwater acoustic transducer.

[0008] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0009] The present application provides a deep well sonar cavity measuring device, including a guide head, a tilt sensor, a sound-transmitting cover, an underwater acoustic transducer, a bracket, a zero-position monitoring sensor, a motor, a motor control module, a motor compartment connector, a control board, a battery, a communication module, a shell, a double male connector, a watertight connector, a seal, a bearing, an oil seal and a screw. The guide head is connected to the sound-transmitting cover by bolts; the bottom of the sound-transmitting cover is provided with an inclination sensor; the two ends of the motor compartment joint are respectively connected to the sound-transmitting cover and the shell by bolts; the upper end of the shell is connected to the double male joint by bolts; the motor control module is integrated on the motor; the motor is installed in the motor compartment by screws; the bottom of the motor compartment is provided with a bearing for straightening the motor shaft and an oil seal for dividing the sound-transmitting cover cavity and the shell cavity; the upper end of the bracket is fixed to the motor shaft by screws; the lower end of the bracket is connected to the hydroacoustic transducer; the control board, the battery, and the communication module are respectively installed in the shell; the watertight connector is connected to the double male joint by threads; the hydroacoustic transducer is fixed to the bracket by screws; the motor is used to drive the hydroacoustic transducer to rotate continuously; the zero position monitoring sensor is installed on the sound-transmitting cover, and is used to calibrate the zero position and rotation direction of the hydroacoustic transducer. The present invention adopts sonar measurement technology to timely and effectively detect the shape and volume of the reservoir transformation cavity, and can accurately calculate the shape and volume of the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1A schematic diagram of the structure of a deep well sonar cavity measuring device provided in one embodiment of the present application;

[0012] Figure 2 A flow chart of the cavity measurement principle provided in one embodiment of the present application;

[0013] Figure 3 A circuit flow chart is provided for an embodiment of the present application. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0015] In order to overcome the adverse effects of underwater acoustic propagation conditions and improve the sonar detection distance, it is necessary to appropriately select the working depth and pitch angle of the array according to the propagation conditions in which the sound speed in the drilling fluid changes with depth. By utilizing different sound wave propagation pathways such as direct sound, reflected sound, convergence zone and deep sea sound channel, the detection distance can be effectively improved.

[0016] The application of sonar measurement technology in reservoir reconstruction can timely and effectively detect the shape and volume of the cavity, so as to accurately calculate these parameters and provide the necessary basic data for reservoir reconstruction. This technology has broad development and application prospects. For example, sonar technology has been used in the detection of underground gas storage in salt caverns or near-surface pipeline detection.

[0017] Sonar detection of underground gas storage in salt caverns is a special field. Currently, there is a lack of independently developed sonar measurement equipment, so it mainly relies on imports.

[0018] Using the salt well cavity in the salt basin as a gas storage is a fast and economical method. In order to optimize the construction design and storage space of the salt cavern, special sonar measurement equipment is needed. These devices can measure the cavity morphology, conduct preliminary selection, and stability evaluation, and formulate technical plans for wellbore repair and reconstruction, determine gas injection and brine removal parameters, and on-site construction technical plans. At the same time, sonar measurement technology can timely and effectively detect the shape and volume changes of the gas storage cavity.

[0019] However, there are some problems with current measuring sonar instruments. They usually have two control ends: tilt measurement and horizontal rotation. This makes the tilt measurement section in a single direction a challenge to the design of the instrument stabilization system when the well is stable, and prolongs the measurement time. In addition, the transducer on the measuring instrument has only one direction and needs to be rotated continuously to complete cavity detection. There is currently a lack of sonar devices suitable for deep wells (greater than 2000m) and high-density drilling fluids. The current research status at home and abroad shows that cavity measuring sonar instruments are still imperfect, and problems such as low detection efficiency and complex stabilization system need to be solved in instrument design.

[0020] The purpose of this application is to provide a deep well sonar cavity measurement device, which uses sonar measurement technology to timely and effectively detect the shape and volume of the reservoir transformation cavity, and can accurately calculate the cavity shape and volume.

[0021] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0022] like Figure 1 As shown, this embodiment provides a deep well sonar cavity measuring device, including: a guide head, a tilt sensor, a sound-transmitting cover, an underwater acoustic transducer, a bracket, a zero position monitoring sensor, a motor, a motor control module, a motor compartment connector, a control board, a battery, a communication module, a housing, a double male connector, a watertight connector, a seal, a bearing, an oil seal and a screw;

[0023] The guide head is connected to the sound-transmitting cover by bolts; an inclination sensor is installed at the bottom of the sound-transmitting cover; the two ends of the motor compartment joint are respectively connected to the sound-transmitting cover and the shell by bolts; the upper end of the shell is connected to the double male joint by bolts; the motor control module is integrated on the motor; the motor is installed in the motor compartment by screws; the bottom of the motor compartment is equipped with a bearing for straightening the motor shaft and an oil seal for dividing the sound-transmitting cover cavity and the shell cavity; the upper end of the bracket is fixed to the motor shaft by screws; the lower end of the bracket is connected to the underwater acoustic transducer; the control board, battery, and communication module are respectively installed in the shell; the watertight connector is connected to the double male joint by threads; the underwater acoustic transducer is fixed to the bracket by screws; the motor is used to drive the underwater acoustic transducer to rotate continuously; the zero position monitoring sensor is installed on the sound-transmitting cover, and is used to calibrate the zero position and rotation direction of the underwater acoustic transducer.

[0024] Among them, Figure 1 As shown, the deep well sonar cavity measuring device, such as Figure 1As shown, the guide head is connected to the sound-transmitting cover by bolts, and a seal is installed between the two. An inclination sensor is installed at the bottom of the sound-transmitting cover. The two ends of the motor compartment joint are connected to the sound-transmitting cover and the shell by bolts respectively, and the upper end of the shell is connected to the double male joint by bolts. The motor control module is integrated on the motor, and the motor is installed in the motor compartment with screws. The bottom of the motor compartment is equipped with a bearing for straightening the motor shaft and an oil seal for dividing the sound-transmitting cover cavity and the shell cavity. The upper end of the bracket is fixed to the motor shaft with screws, and the lower end is connected to the hydroacoustic transducer. The control board, battery, and communication module are installed in the shell respectively. The watertight connector is connected to the double male joint through threads.

[0025] Specifically, deep well sonar cavity measurement devices such as Figure 1 As shown, the underwater acoustic transducer is fixed to the bracket by screws. The transducer is inside the sound-transmitting cover, and the motor drives the bracket to rotate circumferentially, thereby transmitting and receiving sound wave data to measure the shape of the cavity. The motor can drive the underwater acoustic transducer to rotate continuously from 0 to 360 degrees, ensuring that the acoustic transducer can cover the entire circumferential space of the measurement position of the cavity where it is located. Two zero-position monitoring sensors are arranged in the sound-transmitting cover at an interval of 90 degrees, and a zero-position sensor is also installed at the corresponding position of the bracket. During the rotation of the motor, Figure 1 The first zero position sensor 6-1 and the second zero position sensor 6-2 are used to calibrate the zero position and rotation direction of the underwater acoustic transducer. The bottom of the sound-transmitting cover is equipped with sensors for measuring the top angle and azimuth inclination of the sonar cavity measuring device, which are used to determine the direction of the cavity and the orientation of the monitoring device. The motor can be selected from stepper motors, servo motors, torque motors, switched reluctance motors or DC brushless motors. In this embodiment, in order to achieve precise control of the rotation angle of the underwater acoustic transducer, stepper motors are particularly preferred.

[0026] The function of the sound-permeable cover is to seal, transmit sound and balance the internal and external pressures of the downhole housing. The sound-permeable cover is made of polyurethane or other materials with equivalent performance.

[0027] In a specific embodiment, an acoustic signal generation and collection circuit and a communication circuit are installed on the control board, and these circuits are used in conjunction with the acoustic transducer to control the acoustic transducer to collect and measure acoustic data. The acoustic signal generation and collection circuit and the communication circuit are located above the control board to reduce electromechanical noise interference during the collection process.

[0028] Among them, Figure 2As shown in the figure, the transmitter module is responsible for transmitting a pulse signal of a specific frequency and power to the underwater acoustic transducer to ensure that the signal can be effectively transmitted underwater. At the same time, the receiver module performs a series of complex signal processing steps on the echo signal received by the underwater acoustic transducer. First, the signal conditioning link performs preliminary optimization of the echo signal to ensure that the signal quality meets the requirements of subsequent processing. Then, the sound wave acquisition link converts the analog signal into a digital signal for more sophisticated processing. The AD conversion link converts the analog signal into a digital signal for more sophisticated processing. The filtering link removes noise and interference from the signal to ensure the purity of the signal. The signal amplification link appropriately amplifies the signal so that the main control unit FPGA can process the signal more accurately.

[0029] The processed analog signal is then sent to the main control unit FPGA, or field programmable gate array. The main control unit FPGA uses its powerful parallel processing capabilities to perform complex underwater acoustic algorithm processing on the received signal. These algorithms include but are not limited to signal denoising, signal enhancement, signal recognition, etc., to ensure that the final signal has high accuracy and high reliability. After processing, the main control unit FPGA sends the processed signal to the host computer through the optical fiber communication module. After receiving the signal, the host computer performs further data processing and analysis, and finally displays the results of the cavity expansion detection to the user in an intuitive way. In this way, the user can clearly understand the specific situation of the underwater environment and make corresponding decisions and operations.

[0030] exist Figure 3 In the circuit flow chart shown, the data collected by the dual-axis acceleration sensor and the temperature sensor are introduced into the field programmable gate array (FPGA) through their respective amplifiers and dual-trigger buffer circuits. After the FPGA performs the corresponding calculations, the vertex angle, azimuth angle and temperature value of the measurement point can be obtained. In addition, the data collected by the transducer first undergoes a first-level analog-to-digital conversion, then passes through an operational amplifier, and then undergoes a second-level analog-to-digital conversion, and finally connects to the FPGA through a bus transceiver. The FPGA calculates the distance of the measurement point based on these data. The pulse signal and direction control signal sent by the FPGA are transmitted to the drive motor through a dual Schmitt trigger buffer and a motor speed / direction controller. The drive motor drives the transducer to send and collect axial data based on these control signals. Finally, the total power supply provides a stable power input for the FPGA through a filtering circuit and a voltage stabilization circuit.

[0031] In summary, this application has the following technical effects:

[0032] 1) This device uses a low-frequency hydroacoustic transducer. In deep well cavity measurement, there is no need to adjust the drilling fluid parameters and direct measurement can be performed.

[0033] 2) The small diameter structure can be put into the cavity measurement position from the inside of the drill pipe without pulling out all the drilling tools, thus saving cavity measurement time.

[0034] 3) The device is equipped with an inclination sensor, which measures the axial orientation and top angle of the cavity in real time to reconstruct the cavity shape in detail, truly and accurately.

[0035] 4) The downhole instrument and the ground machine in this device are transmitted by optical fiber, which has the advantages of fast transmission speed, small signal loss and high safety.

[0036] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A deep well sonar cavity measuring device, characterized in that: include: Guide head, inclination sensor, sound-transmitting cover, hydroacoustic transducer, bracket, zero-position monitoring sensor, motor, motor control module, motor compartment connector, control board, battery, communication module, housing, double male connector, watertight connector, seal, bearing, oil seal and screws; The guide head is connected to the sound-transmitting cover by bolts; an inclination sensor is installed at the bottom of the sound-transmitting cover; the two ends of the motor compartment joint are respectively connected to the sound-transmitting cover and the shell by bolts; the upper end of the shell is connected to the double male joint by bolts; the motor control module is integrated on the motor; the motor is installed in the motor compartment by screws; the bottom of the motor compartment is equipped with a bearing for straightening the motor shaft and an oil seal for dividing the sound-transmitting cover cavity and the shell cavity; the upper end of the bracket is fixed to the motor shaft by screws; the lower end of the bracket is connected to the underwater acoustic transducer; the control board, battery, and communication module are respectively installed in the shell; the watertight connector is connected to the double male joint by threads; the underwater acoustic transducer is fixed to the bracket by screws; the motor is used to drive the underwater acoustic transducer to rotate continuously; the zero position monitoring sensor is installed on the sound-transmitting cover, and is used to calibrate the zero position and rotation direction of the underwater acoustic transducer.

2. A deep well sonar cavity measuring device according to claim 1, characterized in that: The motor is used to drive the hydroacoustic transducer to perform continuous rotation from 0° to 360°.

3. A deep well sonar cavity measuring device according to claim 1, characterized in that: The zero position monitoring sensor specifically includes: a first zero position monitoring sensor and a second zero position monitoring sensor; the first zero position monitoring sensor and the second zero position monitoring sensor are spaced 90° apart and are used to calibrate the zero position and rotation direction of the underwater acoustic transducer, respectively.

4. A deep well sonar cavity measuring device according to claim 1, characterized in that: The bottom of the sound-transmitting cover is provided with sensors for measuring the top angle and azimuth tilt of a sonar cavity measuring device. The top angle of the sonar cavity measuring device and the azimuth tilt sensors are used to measure the direction of the cavity and the orientation of the monitoring device.

5. A deep well sonar cavity measuring device according to claim 1, characterized in that: The motor may be one of a stepper motor, a servo motor, a torque motor, a switched reluctance motor and a brushless DC motor.

6. A deep well sonar cavity measuring device according to claim 1, characterized in that: The material of the sound-transmitting cover is polyurethane.

7. A deep well sonar cavity measuring device according to claim 1, characterized in that: The control panel is equipped with an acoustic signal generating circuit, a collection circuit and a communication circuit; the acoustic signal generating circuit, the collection circuit and the communication circuit are used to combine with the acoustic transducer and control the acoustic transducer to perform acoustic data collection and measurement.

8. A deep well sonar cavity measuring device according to claim 7, characterized in that: The control panel also includes a transmitter module for transmitting a pulse signal of specific frequency and power to the hydroacoustic transducer.

9. A deep well sonar cavity measuring device according to claim 7, characterized in that: The control board also includes a receiver module for performing signal conditioning, sound wave collection, AD conversion, filtering and signal amplification processing on the echo signal received by the underwater acoustic transducer.

10. A deep well sonar cavity measuring device according to claim 7, characterized in that: The control panel also includes an optical fiber communication module for sending the cavity expansion detection result to the host computer.

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