A drilling slurry backfill compactness detection device

Abstract

The utility model discloses a kind of well drilling raw pulp backfill compactness detection device, belong to geotechnical engineering detection technical field.The device includes acoustic impedance probe, intelligent cable and handheld analysis terminal.Acoustic impedance probe integrates double-frequency sound source and annular hydrophone array, supports 360 ° signal acquisition;Intelligent cable synchronously transmits temperature and depth data;Handheld terminal is built-in temperature compensation algorithm and compactness model, real-time calculation and output result.The utility model detects depth to 50m, single well time consumption does not exceed 20 minutes, with high precision, high efficiency, easy operation and the like Advantages, suitable for geothermal well, pile foundation hole and the like engineering raw pulp backfill compactness rapid detection and repair guidance.

Description

Technical Field

[0001] This utility model belongs to the field of geotechnical engineering testing technology, specifically relating to a device for testing the compaction of drilling slurry backfill. Background Technology

[0002] In geotechnical engineering and drilling operations, the compaction degree of slurry backfill is a key indicator affecting well stability and engineering safety. Current detection methods in this field generally suffer from shallow depth, low accuracy, and poor environmental adaptability. Traditional ring cutter methods are only suitable for shallow areas up to 0.3 meters below the surface, and sand-filling methods are limited to a depth of 1.5 meters, failing to meet the needs of deep well detection. While sonic CT can achieve full-depth well detection, it requires pre-installing multiple probes, with deployment times exceeding two hours, resulting in low efficiency and failing to meet the requirements of rapid on-site detection. Furthermore, existing technologies have poor adaptability to environmental factors; the sonic velocity method does not account for errors caused by water cut fluctuations, and nuclear density meters lack temperature compensation mechanisms in high-temperature formations, leading to detection deviations often exceeding 8%, severely impacting data reliability and engineering judgment.

[0003] Existing patented technologies also have functional limitations. For example, CN112729733A uses fiber optic strain sensing, which can only qualitatively determine the density trend and cannot provide quantitative data; CN115949075B relies on vibration response spectrum analysis, which does not solve the signal distortion problem caused by temperature drift, resulting in insufficient accuracy in deep-layer detection. In summary, the current technology system is insufficient to meet the demands of modern drilling engineering for high-quality, high-efficiency, and intelligent backfill quality evaluation in terms of detection depth coverage, environmental adaptability, quantitative analysis capabilities, and field operability. Therefore, there is an urgent need to develop a new detection device that combines deep-layer detection capabilities, strong anti-interference ability, rapid response, and support for quantitative output. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned defects in the existing technology and provide a compact, convenient, and highly adaptable drilling slurry backfill compaction detection device. By integrating acoustic sensing, temperature-depth synchronous acquisition and intelligent algorithm processing modules, it can achieve high-precision, real-time online detection of backfill compaction throughout the entire well section, thereby improving the quality control level of geotechnical engineering.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A drilling slurry backfill compaction testing device includes an acoustic impedance probe, a smart cable, and a handheld analysis terminal. The acoustic impedance probe is connected to the handheld analysis terminal via the smart cable. The acoustic impedance probe is used to transmit and receive acoustic signals. The smart cable integrates a high-precision temperature sensor and a depth encoder for synchronously transmitting formation temperature and probe depth information. The handheld analysis terminal has a built-in temperature compensation algorithm module, a compaction calculation model, and a data visualization module for real-time data processing and output of test results.

[0006] Furthermore, the acoustic impedance probe has a diameter of 50mm and integrates a piezoelectric ceramic dual-frequency sound source and an 8-channel ring hydrophone array. The piezoelectric ceramic dual-frequency sound source supports frequency switching between 20kHz and 100kHz to adapt to the sound wave propagation requirements of media at different depths. The 8-channel ring hydrophone array supports 360° reception of reflected sound wave signals without dead angles, improving the comprehensiveness and accuracy of data acquisition.

[0007] Furthermore, the temperature sensor in the smart cable has a measurement range of -10℃ to 50℃ and an accuracy of ±0.1℃, while the depth encoder has a resolution of ±1cm, ensuring accurate positioning of the probe within the well and synchronous transmission of temperature-depth signals.

[0008] Furthermore, the handheld analysis terminal is equipped with a 7-inch industrial-grade waterproof touchscreen and a built-in temperature compensation algorithm, which uses a dynamic compensation formula: β cal = β means × [1+0.015(T-25)], where β means is the measured sound attenuation coefficient (dB / m), T is the real-time temperature of the formation (°C), and 0.015 is the temperature compensation coefficient, used to eliminate sound signal distortion under high-temperature conditions.

[0009] Furthermore, the compactness calculation model built into the handheld analysis terminal is constructed based on the correlation between acoustic impedance characteristics and depth, and its expression is: β cal = K × e -b×D + c, where K is the medium characteristic constant, D is the backfill compaction (%), and b and c are soil-related constants used to quantitatively calculate the backfill compaction.

[0010] Furthermore, the handheld analysis terminal is equipped with a void intelligent judgment and repair guidance mechanism. When the backfill compaction is detected to be less than 50%, a void alarm is automatically triggered with a positioning accuracy of ±5cm.

[0011] Furthermore, the maximum detection depth can reach 50 m, no sensors need to be pre-embedded, and the entire set of equipment can be installed and debugged within 20 minutes.

[0012] Beneficial effects: This utility model combines an acoustic impedance probe with a smart cable, demonstrating significant advantages in terms of detection depth range, temperature adaptability, single-well detection time, data output format, and equipment deployment complexity, providing a brand-new solution for the field of geotechnical engineering testing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the cross-sectional structure of the smart cable in an embodiment of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Acoustic impedance probe; 101. Piezoelectric ceramic dual-frequency sound source; 102. 8-channel ring hydrophone array; 2. Intelligent cable; 201. Power and signal transmission line; 202. High-precision temperature sensor; 203. Depth encoder; 204. Outer protective sleeve; 3. Handheld analysis terminal; 301. 7-inch industrial-grade waterproof touchscreen; 302. Temperature compensation algorithm module; 303. Density calculation model; 304. Data visualization module. Detailed Implementation

[0015] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of this application and are therefore intended to limit the scope of protection of this application.

[0016] Please refer to Figure 1 and Figure 2 This embodiment provides a drilling slurry backfill compaction testing device, including an acoustic impedance probe 1, a smart cable 2, and a handheld analysis terminal 3. The acoustic impedance probe 1 is connected to the handheld analysis terminal 3 via the smart cable 2. The acoustic impedance probe 1 adopts a miniaturized design with a diameter of 50mm and integrates key functional modules: a piezoelectric ceramic dual-frequency sound source 101, supporting 20kHz / 100kHz switching to adapt to different depth media; and an 8-channel ring hydrophone array 102 supporting 360° omnidirectional acquisition of reflected signals. The piezoelectric ceramic dual-frequency sound source 101 can automatically switch its operating frequency according to different geological conditions. 20kHz is suitable for deep low-frequency signal propagation, while 100kHz is used for shallow high-frequency signal detection, ensuring signal penetration and resolution in media of different depths. The 8-channel ring hydrophone array 102 can capture sound wave reflection signals from all directions, avoiding signal loss due to probe directionality, thereby ensuring the integrity and accuracy of the test data.

[0017] In the above embodiment, the intelligent cable 2 is a key component connecting the acoustic impedance probe 1 and the handheld analysis terminal 3, integrating a high-precision temperature sensor 202 and a depth encoder 203. The high-precision temperature sensor 203 has a measurement range of -10℃ to 50℃ and an accuracy of ±0.1℃, enabling real-time monitoring of formation temperature changes and synchronous transmission of data to the analysis terminal. The depth encoder 203 has a resolution of ±1cm, ensuring accurate positioning of the probe within the well and providing a reliable spatial reference for subsequent data processing and analysis. The design of the intelligent cable 2 not only achieves synchronous transmission of temperature and depth signals but also possesses excellent anti-interference capabilities and mechanical strength, enabling stable operation in complex underground environments.

[0018] In the above embodiment, the handheld analysis terminal 3 is the "brain" of the entire system, equipped with a 7-inch industrial-grade waterproof touchscreen 301, and includes a built-in temperature compensation algorithm module 302, a density calculation model 303, and a data visualization module 304. The temperature compensation algorithm module 302 is based on the dynamic compensation formula: β cal = β means × [1+0.015(T-25)], where β means β represents the measured acoustic attenuation coefficient (dB / m), T represents the real-time formation temperature (°C), and 0.015 represents the temperature compensation coefficient. This formula, based on the NB / T10350-2019 standard and field verification by the Hebei Geophysical Exploration Institute, has an error controlled within 0.5%, effectively solving the problem of acoustic signal distortion under high-temperature environments. The compaction calculation model 303, based on the correlation between acoustic impedance characteristics and depth, constructs a quantitative calculation model: β cal = K × e -b×D + c, where K is the medium characteristic constant, D is the backfill compaction degree (%), and b and c are soil-related constants. This model, by fitting experimental data, can accurately reflect the variation law of the sound attenuation coefficient under different compaction conditions, thereby achieving precise quantification of backfill compaction degree.

[0019] In the above embodiments, the handheld analysis terminal also includes a cavity intelligent judgment and repair guidance mechanism. When the backfill compaction degree is detected to be less than 50%, the system automatically triggers a cavity alarm with a positioning accuracy of ±5cm. It can calculate the required grouting volume based on the specific parameters of the cavity, providing a scientific basis for subsequent repair work. The handheld analysis terminal supports real-time on-site analysis and report output. Users can intuitively view the detection results, cavity locations, and repair suggestions through a touch screen interface, greatly improving detection efficiency and user experience.

[0020] This utility model provides a drilling slurry backfill compaction testing device that combines an acoustic impedance probe with a smart cable to achieve full well depth testing up to 50m without the need for pre-embedded probes, solving the problem of limited deep-layer testing in traditional methods. It features a built-in high-precision temperature sensor and depth encoder to dynamically eliminate temperature interference. The integrated design allows for single-well deployment testing in no more than 20 minutes, significantly improving efficiency. It can output quantitative compaction data for the entire well depth, cavity coordinates, and grouting volume recommendations, providing accurate data for engineering repairs. It can adapt to complex drilling environments, is highly durable, and its engineering practicality far surpasses existing similar devices.

[0021] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A device for detecting the compaction of drilling slurry backfill, characterized in that: It includes an acoustic impedance probe (1), a smart cable (2), and a handheld analysis terminal (3); the acoustic impedance probe (1) is connected to the handheld analysis terminal (3) via the smart cable (2), and the smart cable (2) integrates a high-precision temperature sensor (202) and a depth encoder (203); the handheld analysis terminal (3) has a built-in temperature compensation algorithm module (302), a density calculation model (303), and a data visualization module.

2. The drilling slurry backfill compaction testing device according to claim 1, characterized in that: The acoustic impedance probe (1) has a diameter of 50 mm and integrates a piezoelectric ceramic dual-frequency sound source (101) and an 8-channel ring hydrophone array (102).

3. The drilling slurry backfill compaction testing device according to claim 2, characterized in that: The piezoelectric ceramic dual-frequency sound source (101) supports frequency switching between 20kHz and 100kHz, adapting to the sound wave propagation requirements of media at different depths.

4. The drilling slurry backfill compaction testing device according to claim 2, characterized in that: The 8-channel ring hydrophone array (102) supports 360° reception of reflected sound wave signals without dead angles.

5. The drilling slurry backfill compaction testing device according to claim 1, characterized in that: The high-precision temperature sensor (202) in the smart cable has a measurement range of -10℃ to 50℃ and an accuracy of ±0.1℃, and the depth encoder (203) has a resolution of ±1cm.

6. The drilling slurry backfill compaction testing device according to claim 1, characterized in that: The handheld analysis terminal (3) is equipped with a 7-inch industrial-grade waterproof touchscreen (301) and a built-in temperature compensation algorithm (302). The algorithm uses a dynamic compensation formula: β cal = β means × [1+0.015(T-25)], where β means is the measured sound attenuation coefficient (dB / m), T is the real-time formation temperature (°C), and 0.015 is the temperature compensation coefficient.

7. The drilling slurry backfill compaction testing device according to claim 1, characterized in that: The compactness calculation model (303) built into the handheld analysis terminal (3) is constructed based on the correlation between acoustic impedance characteristics and depth, and the expression is: β cal = K × e -b×D + c, where K is the medium characteristic constant, D is the backfill compaction degree (%), and b and c are soil-related constants.

8. The drilling slurry backfill compaction testing device according to claim 1, characterized in that: The handheld analysis terminal (3) is equipped with a void intelligent judgment and repair guidance mechanism. When the backfill compaction is detected to be less than 50%, a void alarm is automatically triggered with a positioning accuracy of ±5cm.

9. A drilling slurry backfill compaction testing device according to any one of claims 1-8, characterized in that: The maximum detection depth can reach 50 m, no sensors need to be pre-embedded, and the entire set of equipment can be installed and debugged within 20 minutes.

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