CN113107466B - Gas extraction drilling and hole sealing quality detection device and using method thereof - Google Patents
Gas extraction drilling and hole sealing quality detection device and using method thereof Download PDFInfo
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- CN113107466B CN113107466B CN202110378607.3A CN202110378607A CN113107466B CN 113107466 B CN113107466 B CN 113107466B CN 202110378607 A CN202110378607 A CN 202110378607A CN 113107466 B CN113107466 B CN 113107466B
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- 238000007789 sealing Methods 0.000 title claims abstract description 85
- 238000000605 extraction Methods 0.000 title claims abstract description 78
- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 238000005553 drilling Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 5
- 239000004814 polyurethane Substances 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 description 6
- 238000005065 mining Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/006—Production of coal-bed methane
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Abstract
The invention discloses a gas extraction drilling hole sealing quality detection device and a using method thereof, wherein the detection device comprises a plugging piece, a first hole section, an air inlet pipe, an exhaust pipe, a gas concentration sensor, a tracer gas concentration sensor and a portable tracer gas detector, the plugging piece is positioned in a drill hole to seal a hole opening of the drill hole, the hole sealing section for sealing the drill hole is arranged in the drill hole, the first hole section is a part between the plugging piece and the plugging section, the air inlet pipe is used for injecting tracer gas into the first hole section, the air inlet pipe is provided with an air inlet pipe valve, the exhaust pipe extends into the first hole section, the exhaust pipe is provided with an exhaust pipe valve, and the gas concentration sensor and the tracer gas concentration sensor are both arranged on an extraction pipe. According to the detection of the hole sealing quality detection device for the gas extraction drill hole, the result is accurate, the operation process is simple, and the detection efficiency of the hole sealing quality of the drill hole is greatly improved.
Description
Technical Field
The invention relates to the technical field of gas extraction, in particular to a gas extraction drilling and sealing quality detection device and a use method thereof.
Background
Along with the continuous improvement of coal mining technology, the mining intensity and the mining depth are increased, and the problem of gas disaster also occurs. The gas disaster not only seriously causes personal safety and property loss, but also restricts the safe production of the mine. Especially, coal mining gradually enters deep parts in recent years, the coal mining faces the technical problem of 'three high and one low', and the threat of gas disaster to mine safety production is more serious. The gas extraction is an important means for reducing the gas disaster problem, and the quality of drilling and hole sealing restricts the drilling extraction effect. Therefore, the detection of the sealing quality of the drilled hole is very important.
According to the current gas extraction process commonly used at home and abroad, gas leakage channels exist in coal bodies inside and around the extracted drill hole, and the gas leakage channels existing in the gas extraction process generally exist in the loosening ring gas leakage of the coal bodies around the external drill hole and the gas leakage of an internal extraction pipeline. This will lead to a decrease in gas concentration, affecting the gas extraction rate, and even extending the gas extraction cycle. The key point of the method is that most hole sealing devices and hole sealing quality in the gas extraction process are not detected in the extraction process, so that serious gas leakage occurs in the extraction process, and the production work of a coal mine is seriously influenced. In view of this, the current quality detector for hole sealing and drilling needs manual operation and data collection, and the instrument is complex and complicated to operate, needs a large amount of manpower and material resources, and cannot meet the requirements of safety production of the current mine.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the invention provides a gas extraction drilling and sealing quality detection device and a use method thereof.
The hole sealing quality detection device for the gas extraction drill hole comprises a plugging piece, a first hole section, an air inlet pipe, an exhaust pipe, a gas concentration sensor, a tracer gas concentration sensor and a portable tracer gas detector, wherein the plugging piece is positioned in the drill hole to seal an orifice of the drill hole, the drill hole is internally provided with a hole sealing section for sealing the drill hole, the hole sealing section and the plugging piece are arranged at intervals, the first hole section is a part between the plugging piece and the hole sealing section, the air inlet pipe penetrates through the plugging piece and extends into the first hole section to inject tracer gas into the first hole section, the air inlet pipe is provided with an air inlet pipe valve, the exhaust pipe penetrates through the plugging piece and extends into the first hole section, the exhaust pipe is provided with an exhaust pipe valve, the drill hole is internally provided with an extraction pipe, and the extraction pipe penetrates through the plugging piece and the hole sealing section, the gas concentration sensor and the trace gas concentration sensor are arranged on the extraction pipe and located outside the drill hole, and the portable trace gas detector is arranged at the pipe orifice of one end of the exhaust pipe located at the outer side of the drill hole.
According to the hole sealing quality detection device for the gas extraction drill hole, whether trace gas exists in the extraction pipe or not is detected through the trace gas concentration sensor, and whether a gas leakage channel exists in the drill hole or not is judged.
In some embodiments, the hole sealing quality detection device further comprises a control valve, the control valve is arranged on the extraction pipe and is located on one side, away from the drill hole, of the trace gas concentration sensor, and the control valve is used for controlling the connection and disconnection of the extraction pipe.
In some embodiments, the hole sealing quality detection device further comprises a data line integrator, and the gas concentration sensor and the trace gas concentration sensor are both connected with the data line integrator.
In some embodiments, the drilling hole is an upward hole, a distance between one end of the air inlet pipe extending into the first hole section and the plugging piece is 5cm, and a distance between one end of the air outlet pipe extending into the first hole section and the plugging section is 5 cm.
In some embodiments, the drilled hole is a horizontal hole or a downward hole, a distance between one end of the air inlet pipe extending into the first hole section and the hole sealing section is 5cm, and a distance between one end of the air outlet pipe extending into the first hole section and the plugging piece is 5 cm.
In some embodiments, the material of the closure is polyurethane.
The use method of the hole sealing quality detection device according to another embodiment of the invention comprises the following steps: detecting the gas concentration in the extraction pipe by using a gas concentration sensor, if the gas concentration in the extraction pipe is not within a threshold value, closing the control valve, and plugging the orifice of the gas extraction drill hole by using a plugging piece; respectively inserting an air inlet pipe and an exhaust pipe on the plugging piece, opening an air inlet pipe valve and an exhaust pipe valve, injecting tracer gas into the first hole section of the drilled hole through the air inlet pipe until the portable tracer gas detector detects that the exhaust pipe discharges the tracer gas, and closing the air inlet pipe valve and the exhaust pipe valve; opening a control valve, performing gas extraction by using an extraction pipe, detecting the extracted gas by using a trace gas concentration sensor, judging that the hole sealing quality of the drilled hole is in a problem if the trace gas is detected and the concentration of the trace gas is within a threshold value, and judging that the hole sealing quality of the drilled hole is not in a problem if the trace gas is not detected.
In some embodiments, if the hole sealing quality of the drilled hole is judged to be in problem, closing a control valve on the extraction pipe, and stopping gas extraction; and if the hole sealing quality of the drilled hole is judged to be not in a problem, continuing extraction, and carrying out key monitoring on the drilled hole so as to implement the next measure on the drilled hole.
In some embodiments, the gas concentration not being within the threshold value is that the gas concentration continuously decreases to below 50% within 10 days and after 10 days the gas concentration does not increase and tends to decrease.
In some embodiments, the trace gas concentration sensor is capable of continuously detecting the trace gas for a period of time within 60 hours after the control valve is opened within a threshold value, and the concentration of the trace gas is not less than 300 ppm.
Drawings
Fig. 1 is a schematic diagram of a gas extraction borehole sealing quality detection device according to an embodiment of the invention;
fig. 2 is a partial schematic view of a pore sealing quality detection device according to an embodiment of the present invention.
Reference numerals:
the gas extraction device comprises a drill hole 1, a first hole section 11, a second hole section 12, an extraction pipe 2, a hole sealing section 3, a plugging piece 4, an air inlet pipe 5, an air inlet pipe valve 51, an exhaust pipe 6, an exhaust pipe valve 61, a trace gas concentration sensor 7, a control valve 8, a data line integrator 9 and a gas concentration sensor 10.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
As shown in fig. 1 and 2, the gas extraction drilling and sealing quality detection device according to the embodiment of the invention comprises a sealing piece 4, a first hole section 11, an air inlet pipe 5, an air outlet pipe 6, a gas concentration sensor 10, a trace gas concentration sensor 7 and a portable trace gas detector.
The gas extraction drill hole 1 is internally provided with an extraction pipe 2 and a hole sealing section 3, the extraction pipe 2 is used for extracting gas in the drill hole 1, the hole sealing section 3 is arranged in the gas extraction drill hole, the hole sealing section 3 is used for sealing the drill hole 1, a sealing piece 4 is arranged at the hole opening of the drill hole 1 to seal the hole opening of the drill hole 1, the hole section between the sealing piece 4 and the hole sealing section 3 is a first hole section 11, one side, far away from the first hole section 11, of the hole sealing section 3 is a second hole section 12, and the extraction pipe 2 penetrates through the sealing piece 4 and the hole sealing section 3 to stretch into the second hole section 12 located on the inner side of the hole sealing section 3 and extracts gas from the second hole section 12.
Intake pipe 5 passes in shutoff piece 4 stretches into first hole section 11 between shutoff piece 4 and the hole sealing section 3 to inject tracer gas in first hole section 11, exhaust pipe 6 passes shutoff piece 4 and stretches into first hole section 11, when intake pipe 5 injects tracer gas in to first hole section 11, 6 outside discharges of air accessible blast pipe in the first hole section 11, be equipped with intake pipe valve 51 in the intake pipe 5, be equipped with blast pipe valve 61 on the blast pipe 6.
The position of the inlet pipe 5 and the outlet pipe 6 extending into the first bore section 11 can be adjusted depending on the orientation of the borehole 1. Specifically, when the drill hole 1 is a horizontal hole and a down hole, the distance between one end of the air inlet pipe 5 extending into the first hole section 11 and the hole sealing section 3 is 5cm, and the distance between one end of the air outlet pipe 6 extending into the first hole section 11 and the plugging piece 4 is 5 cm; when the drilling hole 1 is an upward hole, the distance between one end of the air inlet pipe 5 extending into the first hole section 11 and the plugging piece 4 is 5cm, and the distance between one end of the air outlet pipe 6 extending into the first hole section 11 and the hole sealing section 3 is 5 cm.
The density of tracer gas is generally all greater than air density, and tracer gas is sent into to intake pipe 5, can make the air all be displaced out from 11 bottoms in first hole section, when waiting to appear the tracer gas in the blast pipe 6, can prove to be full of tracer gas in the first hole section 11 completely.
Portable tracer gas detector establishes and is located the mouth of pipe department of 1 outside one end in drilling at blast pipe 6, when portable tracer gas detector detected that blast pipe 6 has the tracer gas to discharge, then shows that first hole section 11 is interior to have been full of tracer gas, at this moment, can stop to aerify, and portable tracer gas detector can be at will take, and the testing result is accurate.
The gas concentration sensor 10 and the trace gas concentration sensor 7 are both arranged on the extraction pipe 2 and located outside the drill hole 1, when the hole sealing quality detection device is used for detecting the hole sealing quality, the gas concentration sensor 10 is firstly used for detecting the gas in the extraction pipe 2, if the gas concentration is not within a threshold value, the hole sealing quality of the drill hole 1 is indicated to be possibly problematic, then the trace gas is injected into the first hole section 11 through the gas inlet pipe 5 until the trace gas is discharged to the outside through the gas outlet pipe 6, the first hole section 11 is indicated to be filled with the trace gas, at the moment, the control valve 8 is opened, the gas is extracted through the extraction pipe 2, if the trace gas concentration sensor 7 detects that the trace gas exists in the gas extracted from the extraction pipe 2, the hole sealing quality of the drill hole 1 is indicated to be problematic, gas leakage channels exist around the drill hole 1, at the moment, extraction is stopped, and the drill hole 1 is sealed for the second time or the drill hole 1 is directly closed, if the trace gas concentration sensor 7 does not detect the trace gas from the gas extracted by the extraction pipe 2, the gas can be continuously extracted, and other indexes of the gas extraction in the borehole 1 need to be monitored in a focused manner so as to implement the next measure for the borehole 1.
According to the gas extraction drilling and hole sealing quality detection device provided by the embodiment of the invention, whether a gas leakage channel exists in the drill hole 1 is detected through the trace gas concentration sensor 7, compared with manual detection, the result is more accurate, the structure and the operation flow of the hole sealing quality detection device are simple, and the detection efficiency of the hole sealing quality of the drill hole 1 is greatly improved.
In some embodiments, the hole sealing quality detection device further comprises a control valve 8, the control valve 8 is arranged on the extraction pipe 2, the control valve 8 is located on one side, away from the borehole 1, of the trace gas concentration sensor 7, and the control valve 8 is used for controlling the connection and disconnection of the extraction pipe 2.
When detecting the hole sealing quality of a gas extraction drill hole, the control valve 8 is closed firstly, then tracer gas is injected into the first hole section 11 through the gas inlet pipe 5, after the tracer gas is filled in the first hole section 11, the control valve 8 is opened, an extraction pump is used for extracting gas, if the hole sealing quality is in a problem, the control valve 8 is closed immediately, the gas extraction is stopped, and secondary hole sealing is carried out on the drill hole 1 again or the drill hole is directly closed.
In some embodiments, the hole sealing quality detection device further comprises a data line integrator 9, the tracer gas concentration sensor 7 and the gas concentration sensor 10 are connected with the data line integrator 9, signals detected by the tracer gas concentration sensor 7 and the gas concentration sensor 10 are transmitted to the outside through the data line integrator 9, data are more visual, a worker judges whether the gas extraction quality and the hole sealing quality of the drill hole 1 are qualified according to the uploaded data, and the judgment result is more accurate.
In some embodiments, the material of the closure 4 is polyurethane.
The invention also provides a use method of the hole sealing quality detection device, which comprises the following steps:
1) detecting the gas concentration in the extraction pipe by using a gas concentration sensor, and if the gas concentration in the extraction pipe is not within a threshold value, detecting the hole sealing quality of the drill hole 1;
2) closing the control valve 8, and using a polyurethane material as the plugging piece 4 to plug the orifice of the gas extraction drill hole;
3) after the polyurethane material is micro-hardened, inserting the air inlet pipe 5 and the exhaust pipe 6, opening the air inlet pipe valve 51 and the exhaust pipe valve 61, adjusting the distance between the air inlet pipe 5 and the exhaust pipe 6 entering the plugging piece 4 according to the direction of the drilled hole, injecting tracer gas to the outer side of the hole sealing section 3 of the drilled hole 1 through the air inlet pipe 5 until the tracer gas is exhausted from the exhaust pipe 6, and closing the air inlet pipe valve 51 and the exhaust pipe valve 61;
4) opening the control valve 8, performing gas extraction by using the extraction pipe 2, detecting the extracted gas by using the tracer gas concentration sensor 7, judging that the hole sealing quality of the drill hole 1 is in a problem if the tracer gas is detected and the concentration of the tracer gas is within a threshold value, judging that the hole sealing quality of the drill hole 1 is not in a problem if the tracer gas is not detected, and opening the control valve 8 to continue gas extraction on the drill hole.
Wherein, the gas concentration is not within the threshold value, which means that the gas concentration continuously decreases to below 50% within 10 days, and the gas concentration does not increase and continuously decreases after 10 days.
The concentration of the tracer gas is within 60 hours after the control valve 8 is opened within the threshold value, the tracer gas concentration sensor can continuously detect the tracer gas within a period of time, and the concentration of the tracer gas is not less than 300 ppm.
If the hole sealing quality is judged to be in problem, closing the control valve 8, and stopping gas extraction so as to perform secondary plugging on the drill hole 1 or directly close the drill hole 1; if the hole sealing quality is judged to be not in a problem, the extraction can be continued, but the hole sealing quality of the drill hole 1 needs to be monitored mainly, and the next measure is implemented on the drill hole 1 by monitoring other indexes of the gas extraction in the drill hole 1.
According to the use method of the hole sealing quality detection device provided by the embodiment of the invention, the detection process is simple, the detection efficiency is high, manpower and material resources can be saved, the detection result is more accurate by detecting through the tracer gas concentration sensor 7, and the condition that the gas extraction efficiency is adversely affected due to misjudgment can be avoided to the greatest extent.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used 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 description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides a gas drainage drilling hole sealing quality detection device which characterized in that includes:
a closure piece located within a borehole to close off an orifice of the borehole;
the first hole section is arranged in the drill hole and used for plugging the drill hole, the hole plugging section and the plugging piece are arranged at intervals, and the first hole section is a part between the plugging piece and the hole plugging section;
the air inlet pipe penetrates through the plugging piece and extends into the first hole section so as to inject tracer gas into the first hole section, and an air inlet pipe valve is arranged on the air inlet pipe;
the exhaust pipe penetrates through the plugging piece and extends into the first hole section, and an exhaust pipe valve is arranged on the exhaust pipe;
the gas concentration sensor and the trace gas concentration sensor are arranged on the extraction pipe and are positioned outside the drill hole;
and the portable tracer gas detector is arranged at the position of the exhaust pipe at one end outside the drill hole.
2. The hole sealing quality detection device according to claim 1, further comprising a control valve, wherein the control valve is arranged on the extraction pipe and located on one side, away from the drill hole, of the trace gas concentration sensor, and the control valve is used for controlling the connection and disconnection of the extraction pipe.
3. The hole sealing quality detection device according to claim 1, further comprising a data line integrator, wherein the gas concentration sensor and the trace gas concentration sensor are both connected to the data line integrator.
4. The sealing quality detection apparatus according to claim 1,
the drilling is the ascending hole, the intake pipe stretch into the one end of first hole section with the distance between the shutoff piece is 5cm, the blast pipe stretch into the one end of first hole section with the distance between the shutoff piece is 5 cm.
5. The sealing quality detection apparatus according to claim 1,
the drilling is horizontal hole or down hole, the intake pipe stretch into the one end of first hole section with the distance between the shutoff hole section is 5cm, the blast pipe stretch into the one end of first hole section with the distance between the shutoff piece is 5 cm.
6. The sealing quality detection device according to claim 1, wherein the material of the sealing member is polyurethane.
7. The use method of the gas extraction drilling and sealing quality detection device is characterized by comprising the following steps:
detecting the gas concentration in the extraction pipe by using a gas concentration sensor, and closing the control valve if the gas concentration in the extraction pipe is not within a threshold value;
plugging the orifice of the gas extraction drill hole by using a plugging piece;
respectively inserting an air inlet pipe and an exhaust pipe on the plugging piece, opening an air inlet pipe valve and an exhaust valve, injecting tracer gas into the first hole section of the drilled hole through the air inlet pipe until the portable tracer gas detector detects that the exhaust pipe discharges the tracer gas, and closing the air inlet pipe valve and the exhaust pipe valve;
opening a control valve, performing gas extraction on the drill hole, detecting the extracted gas by using a trace gas concentration sensor, judging that the hole sealing quality of the drill hole has a problem if the trace gas is detected and the concentration of the trace gas is within a threshold value, and judging that the hole sealing quality of the drill hole has no problem if the trace gas is not detected.
8. The use method of the hole sealing quality detection device according to claim 7, wherein if it is determined that the hole sealing quality of the drilled hole is in problem, the control valve on the extraction pipe is closed, and gas extraction is stopped; and if the hole sealing quality of the drilled hole is judged to be not in a problem, continuing extraction, and carrying out key monitoring on the drilled hole so as to implement the next measure on the drilled hole.
9. The method of using the pore sealing quality detection apparatus according to claim 7, wherein the gas concentration is not within the threshold value is that the gas concentration continuously decreases to less than 50% within 10 days and after 10 days, the gas concentration does not increase and tends to decrease.
10. The use method of the hole sealing quality detection device according to claim 7, wherein the concentration of the trace gas is within 60 hours after the control valve is opened within the threshold value, the trace gas concentration sensor can continuously detect the trace gas within a period of time, and the concentration of the trace gas is not less than 300 ppm.
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| CN202110378607.3A CN113107466B (en) | 2021-04-08 | 2021-04-08 | Gas extraction drilling and hole sealing quality detection device and using method thereof |
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