CN110985106B - Ultrasonic detection system and detection method for hole sealing quality of underground gas extraction drill hole - Google Patents
Ultrasonic detection system and detection method for hole sealing quality of underground gas extraction drill hole Download PDFInfo
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- 238000007789 sealing Methods 0.000 title claims abstract description 52
- 238000001514 detection method Methods 0.000 title claims abstract description 31
- 238000000605 extraction Methods 0.000 title claims abstract description 30
- 239000010985 leather Substances 0.000 claims abstract description 41
- 238000002347 injection Methods 0.000 claims description 82
- 239000007924 injection Substances 0.000 claims description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 71
- 229920001971 elastomer Polymers 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 10
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 9
- 239000003063 flame retardant Substances 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000005065 mining Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 239000012945 sealing adhesive Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
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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
- E21B47/10—Locating fluid leaks, intrusions or movements
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- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention belongs to the technical field of borehole sealing quality detection, and particularly relates to an ultrasonic detection system and a detection method for borehole sealing quality of underground gas extraction. Comprises an RSM-SY7 ultrasonic detector, an inflation system, a down-hole injector, a plugging leather plug and a bracket. The system can truly reflect the sealing condition of the hole sealing section of the underground gas extraction drill hole, can effectively measure the sealing quality of the pre-extraction drill hole, can effectively guide the hole sealing operation of the extraction drill hole, improves the extraction efficiency, realizes the effective extraction of coal bed gas from the drill hole, ensures the safe and efficient production of a deep mine, and has strong practicability and convenient popularization and use.
Description
Technical Field
The invention belongs to the technical field of borehole sealing quality detection, and particularly relates to an ultrasonic detection system and a detection method for borehole sealing quality of underground gas extraction.
Background
Coal seam gas extraction is one of main technical measures for preventing and treating coal and gas outburst, is widely applied to domestic and foreign mines, and the gas extraction process comprises three steps of drilling, hole sealing and extraction, so that the quality of hole sealing in the process of influencing the extraction effect has an important influence on the gas extraction process. The existing hole sealing method mainly comprises the following steps: sealing with cement mortar, sealing with yellow mud, sealing with polyurethane and sealing with traditional hole sealing devices. However, it is difficult to ensure the sealing quality completely in each method. If the hole sealing quality is not good, the production progress and the economic benefit of coal enterprises can be influenced, and the threat to safe production can be generated.
Chinese invention patent No. 9/19/2012 discloses a method and equipment for testing the sealing quality of a gas extraction drill hole, with publication No. CN102680187A, which proposes that underground compressed air of a coal mine is filled into the drill hole, the leak tightness of the drill hole is detected by artificially observing the pressure change, however, the gas leakage index only depends on the pressure, and the flow of the drill hole is not considered; the invention patent No. 2013, No. 01 and No. 30 in China discloses a method for detecting the sealing quality and the gas leakage position of a coal seam gas extraction drill hole, which is published with the number CN102900428A, and proposes that a detection pipe is extended into the drill hole, the sealing quality of the drill hole is judged through the gas concentration, the extraction negative pressure and the like at different positions in the drill hole, the method is complex to operate, and the detection is required under the condition of the drill hole negative pressure extraction, so that the detection is passive; meanwhile, both the gas leakage and the gas leakage are lack of reasonable intelligent gas leakage judging models, and the gas leakage situation of the whole extraction period (especially the initial extraction period and the later extraction period) of the drill hole cannot be scientifically and pertinently judged.
According to the prior art, the hole sealing effect is difficult to judge after hole sealing; the hole sealing effect is not ideal, and the leakage point is difficult to find for secondary hole sealing.
Disclosure of Invention
In order to overcome the problems, the invention provides the ultrasonic detection system and the detection method for the hole sealing quality of the underground gas extraction drill hole, which have the advantages of simple structure, convenience in assembly, convenience in use and operation and capability of truly reflecting the hole sealing quality.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a gas drainage drilling hole sealing quality ultrasonic testing system in pit which characterized in that: comprises an RSM-SY7 ultrasonic detector, an inflation system, an underground water injector, a plugging leather plug and a bracket;
the RSM-SY7 ultrasonic detector comprises an ultrasonic data display screen, an acoustic wave sensor and a power supply, wherein the acoustic wave sensor is connected with the acoustic wave data display screen through three waterproof data lines, the acoustic wave sensor comprises an acoustic wave receiver and an acoustic wave transmitter inside, and the acoustic wave sensor must be completely immersed in water when transmitting and receiving acoustic waves;
the inflation system comprises an inflation pipe connected with an inflation rubber plug, the inflation pipe is connected with the pedal type gas injection cylinder, a first tee joint is arranged between the inflation pipe and the pedal type gas injection cylinder, the other end of the first tee joint is connected with a pressure gauge, and a ball valve is arranged between the first tee joint and the pedal type gas injection cylinder;
the underground water injector comprises a water injection valve connected with a water injection pipe, and a pressure gauge is connected between the water injection pipe and the water injection valve through a second tee joint;
the blocking leather plug comprises an inflatable leather plug at the front end of a blocking hole and a rubber leather plug at the rear end of the blocking hole, and the rubber leather plug is provided with a hole passing through a gas injection pipe, a hole passing through a water injection pipe and a slit capable of being clamped into three waterproof data lines;
the bracket is connected to the inflatable leather plug and the acoustic sensor;
the power supply is a 16V explosion-proof battery outer-wrapping explosion-proof box.
The rubber plug is made of flame-retardant rubber materials, and the upper surface of the inflatable rubber plug has friction.
The sound wave sensor, the sound wave receiver and the sound wave transmitter are all waterproof, and the sound wave sensor is externally connected with a exquisite rope.
The bracket is made of aluminum alloy or stainless steel.
A field test method of an ultrasonic detection system for the hole sealing quality of an underground gas extraction drill hole is characterized by comprising the following steps:
step one, building a test device, and the specific process is as follows:
step 101, connecting an inflatable leather plug with a small end of a support, and then connecting the inflatable leather plug with a gas injection pipe;
102, connecting the other end of the bracket with an acoustic wave sensor;
103, enabling the other end of the gas injection pipe connected with the inflation leather plug to penetrate through a gas injection hole of the flame-retardant rubber leather plug, respectively connecting a pressure gauge and a ball valve through a first tee joint, and connecting a pedal inflator;
104, clamping three waterproof data lines of the acoustic wave sensor into a leather plug reserved channel, wherein the data lines are connected to an ultrasonic data display screen;
105, enabling a water outlet of a water injection pipe to penetrate through a water injection pipe hole of the flame-retardant rubber plug, and enabling the other end of the water injection pipe to be connected with a pressure gauge and a water injection valve through a first tee joint;
and step 106, connecting an explosion-proof power supply.
Step two, the specific process of detecting the air tightness of the device is as follows:
step 201, coating and sealing the tee joint, the water injection ball valve, the gas injection pipe and the joint of the inflation rubber plug with silicon rubber, then winding tightly with a sealing adhesive tape, and coating the outer edge with the silicon rubber again;
step 202, opening a gas injection pipe ball valve, stepping an inflator by feet to inject gas for a certain time, and closing the gas injection ball valve after the gas injection is finished;
step 203, observing the reading of the pressure gauge, detecting the air tightness of the air injection device through the change of the reading, and opening the ball valve to deflate after the detection is finished;
step three, injecting water, and the concrete process is as follows:
step 301, connecting a water outlet of a water injection pump with a water injection channel;
step 302, opening a water injection valve, injecting water for a certain time, observing the reading of a water injection pressure gauge, and judging whether the reaction channel is filled with water or not by reading;
step 303, closing a water injection valve;
and step four, opening the ultrasonic data display screen for data acquisition.
And after the data are acquired, dismounting the device according to the reverse sequence of the set-up test device, and analyzing the data to evaluate the hole sealing quality.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the prior equipment, the equipment has small volume and simple and quick installation and movement;
2. the operation is more convenient and faster, and the data acquisition work is more non-professional;
3. compared with the traditional detection mode, the ultrasonic wave is more sensitive to the detection of the crack;
4. the ultrasonic wave has the characteristics of needing water as a medium, and is optimized so that the field measurement can be carried out.
Drawings
FIG. 1 is a schematic diagram of an ultrasonic inspection system according to the present invention;
FIG. 2 is a schematic view of a stent according to the present invention;
in the figure, 1 — an inflated plug; 2-an acoustic wave sensor; 3, inflating a pipe; 4-rubber leather plug; 5, a water injection pipe; 6-a second pressure gauge; 7-a first pressure gauge; 8-ball valve; 9-a pedal type inflator; 10-water injection valve; 11-ultrasonic data display screen; 12-a mining power supply; 13-a first tee; 14-a second tee; 15-a support; 16-waterproof data line; 17-a first circular ring; 18-a first screw; 19-a second ring; 20-a second screw; 21-spring button.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined object, the following detailed description of the embodiments, structures, features and effects according to the present invention will be given with reference to the accompanying drawings and preferred embodiments.
The first embodiment is as follows:
the utility model provides a gas drainage drilling hole sealing quality ultrasonic testing system in pit which characterized in that: comprises an RSM-SY7 ultrasonic detector, an inflation system, a down-hole injector, a plugging leather plug and a bracket (15);
the RSM-SY7 ultrasonic detector comprises an ultrasonic data display screen (11), an acoustic wave sensor (2) and a mining power supply (12), wherein the acoustic wave sensor (2) is connected with the ultrasonic data display screen (11) through three waterproof data lines (16), the acoustic wave sensor (2) comprises an acoustic wave receiver and an acoustic wave transmitter, and the acoustic wave sensor (2) must completely invade into water when transmitting and receiving acoustic waves;
the inflation system comprises an inflation tube (3) connected with an inflation rubber plug (1), the inflation tube (3) is connected with a pedal type air injection tube (9), a first tee joint (13) is arranged between the inflation tube and the pedal type air injection tube, the other end of the first tee joint (13) is connected with a first pressure gauge (7), and a ball valve (8) is arranged between the first tee joint (13) and the pedal type air injection tube (9);
the underground water injector comprises a water injection valve (10) connected with a water injection pipe (5), and a second pressure gauge (6) is connected between the water injection pipe (5) and the water injection valve (10) through a second tee joint;
the blocking leather plug comprises an inflatable leather plug (1) at the front end of a blocking hole and a rubber leather plug (4) at the rear end of the blocking hole, wherein a hole passing through an inflation pipe (3), a hole passing through a water injection pipe (5) and a slit capable of being clamped into three waterproof data lines (16) are formed in the rubber leather plug (4);
the bracket (15) is connected to the inflatable leather plug (1) and the acoustic sensor (2); the power supply (12) is a 16V explosion-proof battery externally-wrapped explosion-proof box.
The rubber plug (4) is made of flame-retardant rubber materials, and the surface of the inflatable rubber plug has good friction.
The sound wave sensor (2), the sound wave receiver and the sound wave transmitter are all waterproof, and the sound wave sensor (2) is externally connected with a exquisite rope.
The bracket (15) is made of aluminum alloy or stainless steel.
Further, the inflation system inflates the inflatable leather plug (1) through the pedal type air injection cylinder (9) to enable the inflatable leather plug (1) to be rapidly plugged, and after the experiment is finished, the inflation system is taken out after rapid deflation.
As shown in figure 2, a first circular ring (17) and a second circular ring (19) of the bracket respectively connect the ultrasonic sensor (2) and the pipeline plugging leather plug (1) and are fixed on a straight line, and the distance between the ultrasonic sensor (2) and the pipeline plugging leather plug (1) can be adjusted through a spring button (21).
Example two
An ultrasonic detection system and a detection method for hole sealing quality of an underground gas extraction drill hole are characterized by comprising the following steps:
step one, building a test device, and the specific process is as follows:
step 101, connecting an inflatable leather plug with a small end of a support, and then connecting the inflatable leather plug with a gas injection pipe;
102, connecting the other end of the bracket with an acoustic wave sensor;
103, enabling the other end of the gas injection pipe connected with the inflation leather plug to penetrate through a gas injection hole of the flame-retardant rubber leather plug, respectively connecting a pressure gauge and a ball valve through a tee joint, and connecting a pedal inflator;
104, clamping three waterproof data lines of the acoustic wave sensor into a leather plug reserved channel, wherein the data lines are connected to an ultrasonic data display screen;
105, enabling a water outlet of a water injection pipe to penetrate through a water injection pipe hole of the flame-retardant rubber plug, and connecting the other end of the water injection pipe with a pressure gauge and a water injection valve through a tee joint;
and step 106, connecting an explosion-proof power supply.
Step two, the specific process of detecting the air tightness of the device is as follows:
step 201, coating and sealing the first tee joint, the water injection ball valve, the gas injection pipe and the inflatable leather plug joint by using silicon rubber, then winding tightly by using a sealing adhesive tape, and coating the outer edge by using the silicon rubber again;
step 202, opening a gas injection pipe ball valve, stepping an inflator by feet to inject gas for a certain time, and closing the gas injection ball valve after the gas injection is finished;
step 203, observing the reading of the pressure gauge, detecting the air tightness of the air injection device through the change of the reading, and opening the ball valve to deflate after the detection is finished;
step three, injecting water, and the concrete process is as follows:
step 301, connecting a water outlet of a water injection pump with a water injection channel;
step 302, opening a water injection valve, injecting water for a certain time, observing the reading of a water injection pressure gauge, and judging whether the reaction channel is filled with water or not by reading;
step 303, closing a water injection valve;
and step four, opening the ultrasonic data display screen for data acquisition.
And after the data are acquired, dismounting the device according to the reverse sequence of the set-up test device, and analyzing the data to evaluate the hole sealing quality.
Further, the transducer continuously emits ultrasonic waves into the bore, which propagate in the water along the bore diameter to the pipe wall and cause vibration of the pipe wall. Since the ultrasonic wave is a longitudinal wave, and the vibration direction of the longitudinal wave coincides with the propagation direction, the tube vibrates up and down and emits a reflected wave. The reflected wave then propagates to the sensor receiving end and is recorded. At this time, according to the sealing situation, two typical vibration modes are divided. When the hole sealing condition is not good, cracks exist between the pipe and the coal body, when the hole sealing effect is good, the cracks do not exist between the pipe and the coal body, and the amplitude of vibration generated by the pipe wall is smaller than that of the hole sealing condition due to the constraint of the grouting material. A signal of smaller amplitude will be received when the reflected wave is received by the sensor. Therefore, the hole sealing condition can be preliminarily judged by comparing the difference between the signals, and in addition, the hole sealing fracture condition can be further analyzed according to waveform analysis.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (7)
1. The utility model provides a gas drainage drilling hole sealing quality ultrasonic testing system in pit which characterized in that: comprises an RSM-SY7 ultrasonic detector, an inflation system, a down-hole injector, a plugging leather plug and a bracket (15);
the RSM-SY7 ultrasonic detector comprises an ultrasonic data display screen (11), an acoustic wave sensor (2) and a mining power supply (12), wherein the acoustic wave sensor (2) is connected with the ultrasonic data display screen (11) through three waterproof data lines (16), the acoustic wave sensor (2) comprises an acoustic wave receiver and an acoustic wave transmitter, and the acoustic wave sensor (2) must completely invade into water when transmitting and receiving acoustic waves;
the inflation system comprises an inflation tube (3) connected with an inflation rubber plug (1), the inflation tube (3) is connected with a pedal type air injection tube (9), a first tee joint (13) is arranged between the inflation tube and the pedal type air injection tube, the other end of the first tee joint (13) is connected with a first pressure gauge (7), and a ball valve (8) is arranged between the first tee joint (13) and the pedal type air injection tube (9);
the underground water injector comprises a water injection valve (10) connected with a water injection pipe (5), and a second pressure gauge (6) is connected between the water injection pipe (5) and the water injection valve (10) through a second tee joint;
the blocking leather plug comprises an inflatable leather plug (1) at the front end of a blocking hole and a rubber leather plug (4) at the rear end of the blocking hole, wherein a hole passing through an inflation pipe (3), a hole passing through a water injection pipe (5) and a slit capable of being clamped into three waterproof data lines (16) are formed in the rubber leather plug (4);
the bracket (15) is connected to the inflatable leather plug (1) and the acoustic sensor (2).
2. The ultrasonic detection system for the hole sealing quality of the underground gas extraction drill hole according to claim 1, characterized in that: the mining power supply (12) is an explosion-proof box wrapped by an explosion-proof battery of 16V.
3. The ultrasonic detection system for the hole sealing quality of the underground gas extraction drill hole according to claim 1, characterized in that: the rubber plug (4) is made of flame-retardant rubber materials, and the surface of the inflatable rubber plug (1) has good friction.
4. The ultrasonic detection system for the hole sealing quality of the underground gas extraction drill hole according to claim 1, characterized in that: the sound wave sensor (2), the sound wave receiver and the sound wave transmitter are all waterproof, and the sound wave sensor (2) is externally connected with a exquisite rope.
5. The ultrasonic detection system for the hole sealing quality of the underground gas extraction drill hole according to claim 1, characterized in that: the bracket (15) is made of aluminum alloy or stainless steel.
6. The detection method of the ultrasonic detection system for the sealing quality of the underground gas extraction borehole according to claim 1, characterized by comprising the following steps:
step one, building a test device, and the specific process is as follows:
step 101, connecting an inflatable leather plug with a small end of a support, and then connecting the inflatable leather plug with a gas injection pipe;
102, connecting the other end of the bracket with an acoustic wave sensor;
103, enabling the other end of the gas injection pipe connected with the inflation leather plug to penetrate through a gas injection hole of the flame-retardant rubber leather plug, respectively connecting a pressure gauge and a ball valve through a tee joint, and connecting a pedal inflator;
104, clamping three waterproof data lines of the acoustic wave sensor into a leather plug reserved channel, wherein the data lines are connected to an ultrasonic data display screen;
105, enabling a water outlet of a water injection pipe to penetrate through a water injection pipe hole of the flame-retardant rubber plug, and connecting the other end of the water injection pipe with a pressure gauge and a water injection valve through a tee joint;
step 106, connecting an explosion-proof power supply;
step two, the specific process of detecting the air tightness of the device is as follows:
step 201, coating and sealing the first tee joint (13), the water injection ball valve (8), the gas injection pipe and the inflatable leather plug joint by using silicon rubber, then winding tightly by using a sealing adhesive tape, and coating and processing the outer edge by using the silicon rubber again;
step 202, opening a gas injection pipe ball valve, stepping an inflator by feet to inject gas for a certain time, and closing the gas injection ball valve after the gas injection is finished;
step 203, observing the reading of the first pressure gauge (7), detecting the air tightness of the air injection device through the change of the reading, and opening the ball valve to deflate after the detection is finished;
step three, injecting water, and the concrete process is as follows:
step 301, connecting a water outlet of a water injection pump with a water injection channel;
step 302, opening a water injection valve (10), injecting water for a certain time, observing the reading of a second water injection pressure gauge (6), and reading to determine whether the reaction channel is filled with water or not;
step 303, closing a water injection valve;
and step four, opening the ultrasonic data display screen for data acquisition.
7. The detection method of the ultrasonic detection system for the hole sealing quality of the underground gas extraction borehole according to claim 6, further comprising, after the data acquisition is completed, dismantling the devices according to a reverse order of the set-up test device, and analyzing the data to evaluate the hole sealing quality.
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| CN112813953B (en) * | 2020-12-29 | 2022-04-15 | 南京工业大学 | Device for reinforcing foundation by microorganism ultrasonic grouting and construction method thereof |
| CN113107466B (en) * | 2021-04-08 | 2022-04-08 | 煤炭科学研究总院有限公司 | Gas extraction drilling and hole sealing quality detection device and using method thereof |
| CN113323643A (en) * | 2021-06-07 | 2021-08-31 | 华能云南滇东能源有限责任公司 | Low-permeability coal body sustainable ultrasonic permeability increasing equipment and process |
| CN114893145B (en) * | 2022-06-24 | 2024-04-16 | 渭南陕煤启辰科技有限公司 | Water plugging device for drilling, stratum fracture crushing condition detection equipment and detection method |
| CN117127967B (en) * | 2023-09-27 | 2024-08-13 | 平顶山天安煤业股份有限公司勘探工程处 | System and method for detecting coal seam drilling gas extraction leakage point |
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