CN113294142B - Device and method for measuring drilling gas flow of water-rich and high-gas-pressure coal seam - Google Patents
Device and method for measuring drilling gas flow of water-rich and high-gas-pressure coal seam Download PDFInfo
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- CN113294142B CN113294142B CN202110784695.7A CN202110784695A CN113294142B CN 113294142 B CN113294142 B CN 113294142B CN 202110784695 A CN202110784695 A CN 202110784695A CN 113294142 B CN113294142 B CN 113294142B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 99
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 238000005553 drilling Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 14
- 239000010865 sewage Substances 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims 4
- 238000004904 shortening Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 9
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction 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
- E21B47/00—Survey of boreholes or wells
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- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Geophysics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Measuring Volume Flow (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention belongs to the field of coal seam drilling gas flow measuring devices, and relates to a drilling gas flow measuring device and method for a coal seam rich in water and high gas pressure, wherein the drilling gas flow measuring device comprises a gas collection buffer device communicated with a drilling hole, a water collector arranged outside the gas collection buffer device and a flow measuring instrument meter communicated with the gas collection buffer device; a drain hole communicated with the water collector is arranged on the outer wall above the water storage chamber, and a liquid metering instrument is arranged on the drain hole. The device can effectively prevent accumulated water in the drill hole from instantly releasing to wash out the flow measuring instrument meter, plays a role in protecting the flow measuring instrument meter, and eliminates the influence of the accumulated water in the drill hole on the flow measuring instrument meter when the gas flow in the drill hole is measured by the device, thereby achieving accurate and continuous measurement of the gas flow in the drill hole, shortening the measurement time, improving the measurement accuracy of coal mine gas parameters and reducing the gas control cost of a mine.
Description
Technical Field
The invention belongs to the field of coal seam drilling gas flow measuring devices, and relates to a drilling gas flow measuring device and method for a coal seam rich in water and high in gas pressure.
Background
At present, a method for directly connecting a pressure measuring drill hole with a flow measuring instrument meter is mostly adopted for measuring the gas flow of a coal seam drill hole, the main defects are that the coal seam drill hole rich in water and high in gas pressure is encountered, a large amount of water exists in the pressure measuring drill hole and coal rock mass around the pressure measuring drill hole, when the gas flow of the drill hole is measured, the coal seam gas is sprayed out by wrapping the drill hole with the gas, the impact is large, and the direct connection with the flow measuring instrument meter is easy to cause water inflow or impact damage of the instrument under the conditions, so that the flow measuring instrument meter cannot normally work or cannot continuously measure the gas flow of the coal seam.
Disclosure of Invention
In view of this, the present invention aims to provide a device and a method for measuring a drilling gas flow in a coal seam with rich water and high gas pressure, so as to solve the problem that the flow measuring instrument cannot work normally due to water inflow and impact damage of the flow measuring instrument during the measurement of the drilling gas flow in the coal seam.
In order to achieve the purpose, the invention provides the following technical scheme: the drilling gas flow measuring device for the coal bed rich in water and high in gas pressure comprises a gas collection buffer device communicated with a drilling hole, a water collector arranged outside the gas collection buffer device and a flow measuring instrument communicated with the gas collection buffer device;
the gas collection buffer device comprises a water storage chamber arranged in the water collector and a gas collection chamber arranged on the water storage chamber, a drain hole communicated with the water collector is arranged on the outer wall above the water storage chamber, and a liquid metering instrument is arranged on the drain hole.
Optionally, the water storage chamber is internally provided with cleaning water, and the horizontal liquid level of the cleaning water is higher than the bottom of the air collection chamber and does not exceed the height of the drain hole.
Optionally, a first air inlet connecting pipe and a first air outlet connecting pipe which are respectively communicated with the inside of the air collection chamber are arranged at the top of the air collection chamber;
the first air inlet connecting pipe is communicated with the measuring drill hole through a rubber hose, and the first air outlet connecting pipe is communicated with the flow measuring instrument through the rubber hose.
Optionally, a second air inlet connecting pipe and a second air outlet connecting pipe are arranged on the flow measuring instrument, and the second air inlet connecting pipe is communicated with the air collection buffer device through a rubber hose.
Optionally, the bottom of the water storage chamber is also provided with a drain communicated with the water collector, and a rubber plug is arranged on the drain.
Optionally, a pressure measuring pipe is arranged in the drill hole and is communicated with the gas collection buffer device through a rubber hose; the pressure measuring pipe is internally provided with a ball valve.
Optionally, the inner diameter of the water storage chamber is larger than that of the air collection chamber.
Optionally, the outer wall of the water collector is provided with scales, the volume of the water collector is larger than that of the gas collection buffer device, and the water collector is matched with the liquid meter for use.
The drilling gas flow measuring method of the coal bed rich in water and high gas pressure is applied to the drilling gas flow measuring device of the coal bed rich in water and high gas pressure, and comprises the following steps of:
s1, injecting clean water into the water storage chamber, connecting one end of the clean water to a pressure measuring pipe through a rubber hose, and connecting the other end of the clean water to a first air inlet connecting pipe on the air collection chamber; meanwhile, one end of the rubber hose is connected with a first air outlet connecting pipe, and the other end of the rubber hose is connected to a second air inlet connecting pipe of the flow measuring instrument;
s2, opening a ball valve of the pressure measuring pipe to measure the gas flow after all the rubber hoses are connected; opening a ball valve of the pressure measuring pipe, and simultaneously recording an initial value of the liquid measuring instrument and an initial value of a flow measuring instrument meter;
s3, after the steps are completed and the record is carried out for 30 minutes, the dial value of the liquid meter is recorded, and the gas flow is obtained through the calculation; and after the gas flow measurement work of the drilling hole is finished, opening the rubber plug of the sewage outlet to discharge sewage, and after the gas flow measurement of one drilling hole is finished, carrying out the gas flow measurement of the next drilling hole according to the operation.
The invention has the beneficial effects that: the device and the method for measuring the gas flow of the drilled hole of the coal seam rich in water and high gas pressure can effectively prevent accumulated water in the drilled hole from instantly releasing to wash out a flow measuring instrument meter, and play a role in protecting the flow measuring instrument meter.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic diagram of the overall structure of the borehole gas flow measuring device for a water-rich, high gas pressure coal seam according to the present invention;
FIG. 2 is a top view of a borehole gas flow measurement apparatus for a water-rich, high gas pressure coal seam of the present invention.
Reference numerals: the device comprises a water collector 1, a gas collection buffer device 2, a gas collection chamber 3, a first air inlet connecting pipe 4, a first air outlet connecting pipe 5, a second air inlet connecting pipe 6, a second air outlet connecting pipe 7, a water discharge hole 8, cleaning water 9, a liquid metering instrument 10, a sewage discharge outlet 11, a rubber hose 12, a drill hole 13 and a flow measuring instrument meter 14.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1-2, a borehole gas flow measuring device for a water-rich and high gas pressure coal seam includes a gas collection buffer device 2 communicated with a borehole 13, a water collector 1 disposed outside the gas collection buffer device 2, and a flow measuring instrument 14 communicated with the gas collection buffer device 2; the gas collection buffer device 2 comprises a water storage chamber arranged in the water collector 1 and a gas collection chamber 3 arranged on the water storage chamber, a water drainage hole 8 communicated with the water collector 1 is formed in the outer wall above the water storage chamber, a liquid metering instrument 10 is installed on the water drainage hole 8, and the liquid metering instrument 10 provides data support for correcting the gas pressure of a drill hole 13. The water storage chamber is internally provided with cleaning water 9, the horizontal liquid level of the cleaning water 9 is higher than the bottom of the gas collection chamber 3 and does not exceed the height of the water discharge hole 8, and the top of the gas collection chamber 3 is provided with a first air inlet connecting pipe 4 and a first air outlet connecting pipe 5 which are respectively communicated with the inside of the gas collection chamber 3; first air inlet connecting pipe 4 is communicated with measuring drill hole 13 through flexible rubber hose 12, first air outlet connecting pipe 5 is communicated with flow measuring instrument meter 14 through flexible rubber hose 12, flow measuring instrument meter 14 is provided with second air inlet connecting pipe 6 and second air outlet connecting pipe 7, second air inlet connecting pipe 6 is communicated with gas collection buffer 2 through flexible rubber hose 12, the bottom of the water storage chamber is also provided with drain 11 communicated with water collector 1, be provided with the rubber buffer on this drain 11, be provided with the pressure measuring pipe in the drill hole 13, this pressure measuring pipe is communicated with gas collection buffer 2 through flexible rubber hose 12, the water storage chamber internal diameter is greater than the 3 internal diameters of gas collection chamber, have the scale on the outer wall of water collector 1, the volume is greater than gas collection buffer 2, and use with liquid measuring instrument 10 cooperation.
In the present embodiment, the flow measuring instrument meter 14 is a flow meter or a gas meter.
In this embodiment, the first inlet connecting pipe 4, the first outlet connecting pipe 5, the second inlet connecting pipe 6 and the second outlet connecting pipe 7 are square steel pipes.
In this embodiment, the reservoir and the water collection chamber are integrally formed, that is, the reservoir is internally tangent to the water collection chamber; or the bottom of the water storage chamber is provided with a circle of connecting rod, the connecting rod is connected with the bottom of the water collection chamber, and the connection is fixed or detachable, so that the measurement and the storage are convenient.
The drilling gas flow measuring method of the water-rich and high-gas-pressure coal seam is applied to the drilling gas flow measuring device of the water-rich and high-gas-pressure coal seam, and comprises the following steps of:
s1, injecting cleaning water 9 into the water storage chamber, connecting one end of the cleaning water to a pressure measuring pipe through a rubber hose 12, and connecting the other end of the cleaning water to a first air inlet connecting pipe 4 on the air collection chamber 3; meanwhile, one end of the rubber hose 12 is connected with the first air outlet connecting pipe 5, and the other end of the rubber hose is connected with the second air inlet connecting pipe 6 of the flow measuring instrument 14;
s2, opening a ball valve of the pressure measuring pipe to measure the gas flow after all the rubber hoses 12 are connected; opening a ball valve of the pressure measuring pipe, and simultaneously recording an initial value of the liquid measuring instrument 10 and an initial value of the flow measuring instrument 14;
s3, after the steps are completed and the record is carried out for 30 minutes, the dial value of the liquid meter 10 is recorded, and the gas flow is obtained through calculation; and after the measurement of the gas flow of the drilling hole 13 is finished, opening the rubber plug of the sewage outlet 11 to discharge sewage, and after the measurement of the gas flow of one drilling hole 13 is finished, measuring the gas flow of the next drilling hole 13 according to the operation.
In this embodiment, the initial level of the cleaning water 9 is just at the drainage position of the drain hole 8, i.e. water flows into the reservoir, rises and drains through the drain hole 8.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (4)
1. Drilling gas flow measuring device in rich water, high gas pressure coal seam, its characterized in that: the device comprises a gas collection buffering device communicated with a drill hole, a water collector arranged outside the gas collection buffering device and a flow measuring instrument communicated with the gas collection buffering device; the gas collection buffer device comprises a water storage chamber arranged in the water collector and a gas collection chamber arranged on the water storage chamber, a water discharge hole communicated with the water collector is arranged on the outer wall above the water storage chamber, and a liquid metering instrument is arranged on the water discharge hole; the top of the gas collection chamber is provided with a first gas inlet connecting pipe and a first gas outlet connecting pipe which are respectively communicated with the inside of the gas collection chamber; the first air inlet connecting pipe is communicated with the measuring drill hole through a rubber hose, and the first air outlet connecting pipe is communicated with the flow measuring instrument through the rubber hose; a second air inlet connecting pipe and a second air outlet connecting pipe are arranged on the flow measuring instrument, and the second air inlet connecting pipe is communicated with the gas collection buffering device through a rubber hose; clean water is arranged in the water storage chamber, the horizontal liquid level of the clean water is higher than the bottom of the gas collection chamber and does not exceed the height of the water discharge hole, and the inner diameter of the water storage chamber is larger than that of the gas collection chamber; a piezometer tube is arranged in the drill hole, and a ball valve is arranged in the piezometer tube; the pressure measuring pipe is communicated with the gas collection buffer device through a rubber hose.
2. The apparatus of claim 1, wherein the flow meter is configured to measure the flow of gas through a borehole in a water-rich, high gas pressure coal seam: the bottom of the water storage chamber is also provided with a drain outlet communicated with the water collector, and a rubber plug is arranged on the drain outlet.
3. A borehole gas flow measurement device for a water-rich, high gas pressure coal seam according to claim 1, wherein: the outer wall of the water collector is provided with scales, the volume of the water collector is larger than that of the gas collection buffer device, and the water collector is matched with a liquid meter for use.
4. The method for measuring the borehole gas flow of the water-rich high-gas-pressure coal seam is applied to the device for measuring the borehole gas flow of the water-rich high-gas-pressure coal seam according to any one of claims 1 to 3, and is characterized by comprising the following steps of:
s1, injecting clean water into the water storage chamber, connecting one end of the clean water to a pressure measuring pipe through a rubber hose, and connecting the other end of the clean water to a first air inlet connecting pipe on the air collection chamber; meanwhile, one end of the rubber hose is connected with a first air outlet connecting pipe, and the other end of the rubber hose is connected to a second air inlet connecting pipe of a flow measuring instrument;
s2, opening a ball valve of the pressure measuring pipe to measure the gas flow after all the rubber hoses are connected; opening a ball valve of the pressure measuring pipe, and simultaneously recording an initial value of the liquid measuring instrument and an initial value of the flow measuring instrument;
s3, after the steps are completed and the record is carried out for 30 minutes, the dial value of the liquid meter is recorded, and the gas flow is obtained through the calculation; and after the gas flow measurement work of the drilling hole is finished, opening the rubber plug of the sewage outlet to discharge sewage, and after the gas flow measurement of one drilling hole is finished, measuring the gas flow of the next drilling hole according to the steps.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110784695.7A CN113294142B (en) | 2021-07-12 | 2021-07-12 | Device and method for measuring drilling gas flow of water-rich and high-gas-pressure coal seam |
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| CN202110784695.7A CN113294142B (en) | 2021-07-12 | 2021-07-12 | Device and method for measuring drilling gas flow of water-rich and high-gas-pressure coal seam |
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| CN113294142B true CN113294142B (en) | 2022-07-15 |
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