CN110608029B - Medium coupling device and method for testing liquid nitrogen fracturing coal seam fracture through drilling - Google Patents
Medium coupling device and method for testing liquid nitrogen fracturing coal seam fracture through drilling Download PDFInfo
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- CN110608029B CN110608029B CN201911001393.7A CN201911001393A CN110608029B CN 110608029 B CN110608029 B CN 110608029B CN 201911001393 A CN201911001393 A CN 201911001393A CN 110608029 B CN110608029 B CN 110608029B
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- coal seam
- rubber ring
- sealing rubber
- coupling
- liquid nitrogen
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 239000003245 coal Substances 0.000 title claims abstract description 52
- 238000010168 coupling process Methods 0.000 title claims abstract description 52
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 51
- 230000008878 coupling Effects 0.000 title claims abstract description 50
- 238000005553 drilling Methods 0.000 title claims abstract description 33
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 239000007788 liquid Substances 0.000 title claims abstract description 30
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 230000008859 change Effects 0.000 claims abstract description 12
- 238000011161 development Methods 0.000 claims abstract description 7
- 239000007822 coupling agent Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000035699 permeability Effects 0.000 claims description 6
- 238000010257 thawing Methods 0.000 abstract description 5
- 206010017076 Fracture Diseases 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 4
- 208000010392 Bone Fractures Diseases 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- -1 vaseline Substances 0.000 description 1
Images
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention belongs to the field of coal seam crack testing, and particularly relates to a medium coupling device and method for testing liquid nitrogen fracturing coal seam cracks through drilling. The invention relates to a medium coupling device for testing liquid nitrogen fracturing coal seam cracks by drilling, which comprises an ultrasonic sensor and a temperature sensor, and is characterized in that: the coupling medium cavity is arranged in the coupling medium cavity, the lower portion of the coupling medium cavity is connected with one end of an ultrasonic sensor, the other end of the ultrasonic sensor is connected with the second sealing rubber ring, the guide rod is arranged on the lower portion of the second sealing rubber ring, the first sealing rubber ring is sleeved outside the coupling medium cavity and close to the bottom surface of the coupling medium cavity, and the temperature sensor is fixed in the guide rod. The device can effectively measure the fracture development change and the temperature change of the coal bed under the action of freeze thawing and cracking of liquid nitrogen in real time.
Description
Technical Field
The invention belongs to the field of coal seam crack testing, and particularly relates to a medium coupling device and method for testing liquid nitrogen fracturing coal seam cracks through drilling.
Background
At present, methods such as hydraulic fracturing, hydraulic slotting, presplitting blasting, low-temperature medium freeze thawing and the like are mostly adopted in China to increase permeability of coal beds, and the method is particularly important for improving gas extraction efficiency and monitoring the on-site coal bed fracturing effect in real time. Currently, effective means for monitoring the coal seam fracture development include a direct current method instrument, an ultrasonic detection analyzer and the like.
The ultrasonic detection analyzer transmits ultrasonic waves in a measured object, when the thickness of the measured object is integral multiple of half wavelength of the ultrasonic waves, resonance is caused, the instrument displays resonance frequency, if defects exist in the measured object, the resonance frequency changes, and the internal state of the measured object is judged by using the difference of the resonance frequency. In order to reduce measurement errors, coupling agents are needed between the ultrasonic sensor probe and the measured object and between the temperature sensor probe and the measured object, the probes can be coupled on the measured object, but in field drilling application, a medium coupling device is lacked in a testing instrument, a coupling medium filling device in a drill hole is needed, and therefore rapid and efficient testing of an engineering field is achieved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a medium coupling device and a medium coupling method for testing liquid nitrogen induced cracking coal seam cracks by drilling, which can dynamically monitor the crack development change and temperature change of a coal seam under the action of freeze thawing and induced cracking of liquid nitrogen.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a medium coupling device of drilling test liquid nitrogen fracturing coal seam crack, includes ultrasonic sensor, temperature sensor, its characterized in that: the coupling medium cavity is arranged in the coupling medium cavity, the lower portion of the coupling medium cavity is connected with one end of an ultrasonic sensor, the other end of the ultrasonic sensor is connected with the second sealing rubber ring, the guide rod is arranged below the second sealing rubber ring, the first sealing rubber ring is sleeved outside the coupling medium cavity and close to the bottom of the coupling medium cavity, and the temperature sensor is fixed in the guide rod.
And a glue outlet hole is formed in the side surface of the coupling medium cavity and is positioned below the first sealing rubber ring.
And the first sealing rubber ring and the second sealing rubber ring are provided with wire passing holes.
The temperature sensor is connected with the digital display thermometer through a temperature data transmission line, and the ultrasonic sensor is connected with the ultrasonic data acquisition instrument through an ultrasonic data transmission line.
The guide rod is reverse L type, but the guide rod is telescopic link, the L type port of guide rod and the vertical parallel and level in edge of first sealed rubber ring, the sealed rubber ring of second.
A method for drilling a medium coupling device for testing liquid nitrogen fracturing coal seam cracks is characterized by comprising the following steps:
a. constructing a main drilling hole in an air inlet roadway or an air return roadway of the coal seam, injecting liquid nitrogen into the main drilling hole, and infiltrating the liquid nitrogen into the coal seam through the branch drilling holes to crack;
b. and symmetrically constructing two testing holes on two sides of the main drilling hole, wherein the region between the two testing holes is a liquid nitrogen fracturing coal seam permeability increasing region.
c. And medium coupling devices for testing cracks and temperature are arranged in the two testing holes, a piston rod is pushed, a couplant in the coupling medium cavity is extruded out from the glue outlet hole, the couplant is filled in sealing gaps formed between the first sealing rubber ring and the second sealing rubber ring and between the ultrasonic sensor and the wall surface of the coal bed, the couplant is coupled on the ultrasonic sensor, and the crack development change of the coal bed can be detected through an ultrasonic data acquisition instrument.
d. The temperature sensor in the guide bar is directly contacted with the wall surface of the coal bed, and the temperature change condition in the coal bed is displayed through a digital display type thermometer.
Has the advantages that: the temperature sensor is arranged in the guide rod and is in contact with the wall surface of the coal bed, and the ultrasonic sensor is in contact with the coal bed through the coupling medium, so that the crack development change and the temperature change of the coal bed under the action of freeze thawing and cracking of liquid nitrogen can be effectively measured in real time.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of a medium coupling device for drilling and testing liquid nitrogen fractured coal seam cracks according to the invention;
FIG. 2 is a schematic diagram of directional drilling and liquid nitrogen circulating freeze-thawing permeability increase of a coal seam according to the invention;
in the figure, 1-branch drilling, 2-low temperature resistant steel pipe, 3-main drilling, 4-test hole, 4-1-guide rod, 4-2-temperature sensor, 4-3-first sealing rubber ring, 4-second sealing rubber ring, 4-5-temperature data transmission line, 4-6-coupling medium cavity, 4-7-ultrasonic data transmission line, 4-8-coal bed, 4-9-ultrasonic sensor, 4-10-glue outlet hole, 4-11-piston rod, 4-12-digital thermometer, 4-13-ultrasonic data acquisition instrument, 5-air inlet lane or air return lane.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The first embodiment is as follows:
a medium coupling device for drilling and testing a liquid nitrogen fracturing coal seam crack, as shown in figure 1, comprises an ultrasonic sensor 4-9 and a temperature sensor 4-2, and is characterized in that: the temperature sensor is characterized by further comprising a coupling medium cavity 4-6, a piston rod 4-11, a first sealing rubber ring 4-3, a second sealing rubber ring 4-4 and a guide rod 4-1, wherein the piston rod 4-11 is arranged in the coupling medium cavity 4-6, the lower portion of the coupling medium cavity 4-6 is connected with one end of an ultrasonic sensor 4-9, the other end of the ultrasonic sensor 4-9 is connected with the second sealing rubber ring 4-4, the guide rod 4-1 is arranged below the second sealing rubber ring 4-4, the first sealing rubber ring 4-3 is sleeved outside the coupling medium cavity 4-6 and close to the bottom of the coupling medium cavity 4-6, and the temperature sensor 4-2 is fixed in the guide rod 4-1.
The side face of the coupling medium cavity is provided with a glue outlet 4-10, and the glue outlet 4-10 is positioned below the first sealing rubber ring 4-3.
And the first sealing rubber ring 4-3 and the second sealing rubber ring 4-4 are provided with wire passing holes.
The temperature sensor 4-2 is connected with the digital display thermometer 4-12 through a temperature data transmission line 4-5, and the ultrasonic sensor 4-9 is connected with the ultrasonic data acquisition instrument 4-13 through an ultrasonic data transmission line 4-7.
The guide rod 4-1 is reverse L-shaped, the guide rod is a telescopic rod, and an L-shaped port of the guide rod 4-1 is vertically flush with the edges of the first sealing rubber ring 4-3 and the second sealing rubber ring 4-4.
Temperature data of different regional positions of coal seam can be monitored dynamically through the scalable of guide bar.
Example two
As shown in fig. 2, a schematic diagram of directional drilling of a coal seam and liquid nitrogen circulation freeze-thaw permeability increase, and a method for drilling a medium coupling device for testing liquid nitrogen fracturing coal seam fractures comprises the following steps:
a. constructing a main drilling hole 3 in an air inlet tunnel or an air return tunnel 5 of the coal bed, injecting liquid nitrogen into the main drilling hole, and enabling the liquid nitrogen to penetrate into the coal bed through the branch drilling holes 1 to crack;
b. two testing holes 4 are symmetrically constructed on two sides of the main drilling hole 3, and the area between the two testing holes 4 is the liquid nitrogen fracturing coal seam permeability increasing area.
c. And medium coupling devices for testing cracks and temperature are arranged in the two testing holes 4, a piston rod 4-11 is pushed, a coupling agent in a coupling medium cavity 4-6 is extruded out from a glue outlet hole 4-10, the coupling agent is filled in a sealing gap formed between the first sealing rubber ring 4-3 and the second sealing rubber ring 4-4 and the ultrasonic sensor 4-9 and the coal seam wall surface 4-8, the coupling agent is coupled on the ultrasonic sensor 4-9, and the crack development change of the coal seam can be detected through an ultrasonic data acquisition instrument 4-13.
d. The temperature sensor 4-2 in the guide rod 4-1 is directly contacted with the wall surface 4-8 of the coal seam, and the temperature change condition in the coal seam is displayed through a digital display type thermometer 4-12.
And a pressure measuring port is arranged on the low temperature resistant steel pipe 2, and the pressure measuring port is connected with a high-pressure gauge.
The coupling medium comprises coupling agent such as vaseline, epoxy resin, etc. The ultrasonic sensors 4-9 are communicated with the coal bed through the coupling agent, so that the measurement error is effectively reduced.
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.
It should be noted that the descriptions relating to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the case of no conflict, a person skilled in the art may combine the related technical features in the above examples according to actual situations to achieve corresponding technical effects, and details of various combining situations are not described herein.
While the preferred embodiments of the present invention have been described above, it should be understood that they are not intended to limit the invention in any way, but rather, they are intended to cover all modifications, equivalents and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. An operation method of a medium coupling device for testing liquid nitrogen fracturing coal seam cracks in a drilling hole comprises an ultrasonic sensor (4-9), a temperature sensor (4-2), a coupling medium cavity (4-6), a piston rod (4-11), a first sealing rubber ring (4-3), a second sealing rubber ring (4-4) and a guide rod (4-1), wherein the piston rod (4-11) is arranged in the coupling medium cavity (4-6), the lower part of the coupling medium cavity (4-6) is connected with one end of the ultrasonic sensor (4-9), the other end of the ultrasonic sensor (4-9) is connected with the second sealing rubber ring (4-4), the guide rod (4-1) is arranged below the second sealing rubber ring (4-4), the first sealing rubber ring (4-3) is sleeved outside the coupling medium cavity (4-6) and close to the bottom surface of the coupling medium cavity (4-6), the temperature sensor (4-2) is fixed in the guide rod (4-1), and the operation method is characterized by comprising the following steps:
a. constructing a main drilling hole (3) in an air inlet roadway or an air return roadway (5) of the coal seam, injecting liquid nitrogen into the main drilling hole, and infiltrating the liquid nitrogen into the coal seam through the branch drilling holes (1) to crack;
b. two testing holes (4) are symmetrically constructed on two sides of the main drilling hole (3), and the area between the two testing holes (4) is a liquid nitrogen fracturing coal seam permeability increasing area;
c. installing medium coupling devices for testing cracks and temperature in the two testing holes (4), pushing a piston rod (4-11), extruding a coupling agent in a coupling medium cavity (4-6) from a glue outlet hole (4-10), filling the coupling agent in a sealing gap formed between the first sealing rubber ring (4-3) and the second sealing rubber ring (4-4) and the ultrasonic sensor (4-9) and the coal seam wall surface (4-8), coupling the coupling agent on the ultrasonic sensor (4-9), and detecting the crack development change of the coal seam through an ultrasonic data acquisition instrument (4-13);
d. the temperature sensor (4-2) in the guide rod (4-1) is directly contacted with the wall surface (4-8) of the coal seam, and the temperature change condition in the coal seam is displayed through a digital display type thermometer (4-12).
2. The operation method of the medium coupling device for drilling and testing the liquid nitrogen fractured coal seam crack according to the claim 1 is characterized in that a glue outlet (4-10) is arranged on the side surface of the coupling medium cavity (4-6), and the glue outlet (4-10) is positioned below the first sealing rubber ring (4-3).
3. The operation method of the medium coupling device for drilling and testing the liquid nitrogen fractured coal seam crack according to the claim 1, wherein the first sealing rubber ring (4-3) and the second sealing rubber ring (4-4) are provided with wire through holes.
4. The operation method of the medium coupling device for drilling and testing the liquid nitrogen fractured coal seam crack according to the claim 1 is characterized in that the temperature sensor (4-2) is connected with a digital display type thermometer (4-12) through a temperature data transmission line (4-5), and the ultrasonic sensor (4-9) is connected with an ultrasonic data acquisition instrument (4-13) through an ultrasonic data transmission line (4-7).
5. The operation method of the medium coupling device for drilling and testing the liquid nitrogen fractured coal seam crack according to the claim 1 is characterized in that the guide rod (4-1) is in an inverted L shape, the guide rod (4-1) is a telescopic rod, and an L-shaped port of the guide rod (4-1) is vertically flush with the edges of the first sealing rubber ring (4-3) and the second sealing rubber ring (4-4).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001393.7A CN110608029B (en) | 2019-10-21 | 2019-10-21 | Medium coupling device and method for testing liquid nitrogen fracturing coal seam fracture through drilling |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911001393.7A CN110608029B (en) | 2019-10-21 | 2019-10-21 | Medium coupling device and method for testing liquid nitrogen fracturing coal seam fracture through drilling |
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| Publication Number | Publication Date |
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| CN110608029A CN110608029A (en) | 2019-12-24 |
| CN110608029B true CN110608029B (en) | 2021-08-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113175317B (en) * | 2021-04-08 | 2024-04-26 | 中化地质矿山总局地质研究院 | Sensor directional installation device and installation method |
| CN114113318B (en) * | 2021-11-04 | 2023-05-23 | 北京强度环境研究所 | Ultrasonic welding seam quality detection device for low-temperature environment |
| CN114575813B (en) * | 2022-03-05 | 2023-04-21 | 中国矿业大学 | Liquid nitrogen fracturing device, construction method and fracturing system with fracturing device |
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| CN104963682A (en) * | 2015-06-26 | 2015-10-07 | 华北理工大学 | Dual-mode glue extruding type dynamic pressure testing strainmeter |
| WO2016137511A1 (en) * | 2015-02-27 | 2016-09-01 | Halliburton Energy Services, Inc. | Ultrasound color flow imaging for oil field applications |
| CN108661621A (en) * | 2018-04-28 | 2018-10-16 | 黑龙江工业学院 | A kind of Mine-used I. S multiparameter recorder |
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- 2019-10-21 CN CN201911001393.7A patent/CN110608029B/en active Active
Patent Citations (5)
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|---|---|---|---|---|
| CN103026219A (en) * | 2010-05-27 | 2013-04-03 | 田纳科汽车营运公司 | Ultrasonic acoustic emissions to detect substrate fracture |
| CN102798669A (en) * | 2011-05-26 | 2012-11-28 | Pii有限公司 | Apparatus for pipeline inspection |
| WO2016137511A1 (en) * | 2015-02-27 | 2016-09-01 | Halliburton Energy Services, Inc. | Ultrasound color flow imaging for oil field applications |
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| CN108661621A (en) * | 2018-04-28 | 2018-10-16 | 黑龙江工业学院 | A kind of Mine-used I. S multiparameter recorder |
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