CN111677495A - Coal mine underground directional drilling gas measurement while drilling device, drilling tool and measurement method - Google Patents
Coal mine underground directional drilling gas measurement while drilling device, drilling tool and measurement method Download PDFInfo
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- CN111677495A CN111677495A CN202010382243.1A CN202010382243A CN111677495A CN 111677495 A CN111677495 A CN 111677495A CN 202010382243 A CN202010382243 A CN 202010382243A CN 111677495 A CN111677495 A CN 111677495A
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- 238000005553 drilling Methods 0.000 title claims abstract description 112
- 238000005259 measurement Methods 0.000 title claims abstract description 45
- 239000003245 coal Substances 0.000 title claims abstract description 25
- 238000000691 measurement method Methods 0.000 title abstract description 4
- 239000000523 sample Substances 0.000 claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 28
- 238000012856 packing Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 23
- 238000010276 construction Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 claims description 2
- 238000005538 encapsulation Methods 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004047 hole gas Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000005641 tunneling Effects 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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- 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
- E21B33/126—Packers; Plugs with fluid-pressure-operated elastic cup or skirt
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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
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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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
- E21B47/06—Measuring temperature or pressure
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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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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- Geochemistry & Mineralogy (AREA)
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Abstract
The invention discloses a measurement device, a drilling tool and a measurement method for directional drilling gas while drilling in an underground coal mine, wherein the measurement device for the gas while drilling comprises a gas measurement unit and a packing unit for sealing a gap between the gas measurement unit and the wall of a drilling hole; the gas measuring unit comprises a first outer pipe and a probe pipe arranged in the first outer pipe, and a gap for high-pressure medium to flow is formed between the probe pipe and the first outer pipe; a section of sealed cavity for storing gas is arranged between the outer wall of the probe tube and the inner wall of the first outer tube, an air inlet hole communicated with the sealed cavity is arranged on the wall of the first outer tube, and a first control valve is arranged in the air inlet hole; and a gas pressure sensor, a gas concentration sensor and an exhaust fan are arranged in the sealing cavity. The device and the drilling tool extend into the drilling hole together, so that the gas parameter can be measured in real time, the timeliness is realized, and the accuracy and the reliability of the measured data are ensured.
Description
Technical Field
The invention belongs to the technical field of drilling, and relates to a device, a drilling tool and a method for measuring gas while drilling in coal mine underground directional drilling.
Background
The existing underground coal mine directional drilling technology is widely applied, and comprises a hydraulic directional drilling technology and a pneumatic directional drilling technology, directional drilling can be carried out to a preset area due to the advantage of controllable track, and the drilling depth is large and reaches hundreds of meters or even thousands of meters; particularly, in the gas treatment of the bedding directional hole of the working face, the gas pre-pumping of the bedding drilling of the tunneling strip or the gas pre-pumping of the comb-shaped hole of the top plate and the bottom plate, the condition that the gas of the stratum needs to be measured in real time in the directional drilling construction or after the construction often occurs or meets.
The coal seam gas pressure is generally measured by adopting a hole sealing balance test method, a certain amount of gas is injected after the hole sealing is lifted, the process is complex, time and labor are wasted, and the actual operation of deep holes is difficult; for the measurement of parameters such as gas content and the like, which relate to deep hole sampling, the sampling effect and the test result are not ideal; and especially for deep holes, actual measurement data is not accurate after pressure relief and gas dissipation after construction, and the real condition of gas in an original coal seam cannot be reflected.
Disclosure of Invention
In order to solve the problems, the invention provides a device, a drilling tool and a method for measuring gas while drilling in underground directional drilling of a coal mine, and solves the problems that the existing gas measuring process is complex in process, time-consuming and labor-consuming, and inaccurate in measured data.
In order to solve the technical problems, the invention adopts the following technical scheme:
the coal mine underground directional drilling gas measurement while drilling device comprises a gas measurement unit and a packing unit for sealing a gap between the gas measurement unit and the wall of a drill hole;
the gas measurement unit comprises a first outer pipe and a probe pipe arranged in the first outer pipe, and a gap for high-pressure medium to flow is formed between the probe pipe and the first outer pipe;
a section of sealed cavity for storing gas is arranged between the outer wall of the probe tube and the inner wall of the first outer tube, an air inlet hole communicated with the sealed cavity is arranged on the wall of the first outer tube, and a first control valve is arranged in the air inlet hole; and a gas pressure sensor, a gas concentration sensor and an exhaust fan are arranged in the sealing cavity.
Specifically, the probe tube comprises a main body section and a flange section, and a gap for flowing the high-pressure medium is arranged between the outer wall of the main body section and the inner wall of the first outer tube; the outer diameter of the flange section is matched with the inner diameter of the first outer pipe, a groove is formed in the side face of the flange section, the groove and the inner wall of the first outer pipe form the sealing cavity, and a first through hole which is communicated along the flowing direction of a high-pressure medium is formed in the flange section.
Furthermore, a support body for supporting the probe tube is arranged in the first outer tube.
Specifically, the packing unit comprises a second outer pipe, a rubber cylinder capable of expanding under the extrusion of a high-pressure medium, a second control valve and a third control valve for controlling the high-pressure medium in the second outer pipe to flow to the first outer pipe;
the second outer pipe is communicated with the first outer pipe; the rubber cylinder is sleeved on the outer wall of the second outer pipe, a second through hole is formed in the pipe wall of the second outer pipe, where the rubber cylinder is arranged, and a second control valve is arranged in the second through hole.
Further, a controller is arranged in the second outer pipe and used for controlling the opening and closing of the first control valve, the second control valve and the third control valve and the operation and stop of the exhaust fan; and a gap for passing high-pressure medium is arranged between the controller and the inner wall of the second outer pipe.
Specifically, the controller is rod-shaped as a whole, the controller is connected with the probe tube, the second control valve is connected to the middle of the controller, and the third control valve is connected to one end of the controller connected with the probe tube.
The invention also discloses a coal mine underground directional drilling tool which comprises a drill bit, a screw drill, the gas measuring device, a track measuring instrument and a cable-through drill rod which are sequentially connected, wherein the gas measuring device is connected between the screw drill and the track measuring instrument, the gas measuring unit is connected with the screw drill, and the packing unit is connected with the track measuring instrument.
The invention also discloses a method for measuring gas while drilling in coal mine underground directional drilling, which adopts the directional drilling tool to carry out drilling and gas measurement, and the method specifically comprises the following steps:
step 1, when a drilling tool drills in a hole, a packing unit does not operate, high-pressure medium flows into a screw drilling tool through a gap between a probe pipe and a first outer pipe in a gas measurement unit, the screw drilling tool is driven to operate to carry out directional drilling construction, drilling track data are measured through a track measuring instrument and sent to an orifice monitor, and track control is carried out on the constructed directional drilling hole;
and 6, after the gas measurement work is finished, continuing directional drilling according to the step 1, and if the gas at the bottom of the hole needs to be measured, measuring the gas parameters according to the steps 2 to 5.
Specifically, the specific method for sealing the gap between the gas measurement unit and the hole wall of the drill hole by the sealing unit in the step 2 is as follows: closing the third control valve and opening the second control valve; inputting a high-pressure medium again, wherein the high-pressure medium enters the rubber cylinder through the second through hole, extruding the rubber cylinder to expand, and when the expansion pressure reaches a certain value, the outer wall of the rubber cylinder is in close contact with the wall of the drilled hole to realize sealing;
the deblocking method of the blocking unit in the step 4 comprises the following steps: and (4) releasing the pressure in the drilling tool, wherein the expanded rubber sleeve is released through a second control valve until the rubber sleeve is contracted and returns to a normal state.
Compared with the prior art, the invention has the beneficial effects that:
(1) the gas measuring device is connected to the drilling tool and extends into the drilling tool together with the drilling tool, gas parameters are measured at a preset position in real time according to requirements in directional long drilling construction, and the occurrence gas condition of a coal bed can be calculated and analyzed according to the parameter change condition, so that the gas measuring device has timeliness and ensures the accuracy and reliability of measured data.
(2) For deep hole gas measurement, the gas measurement device can avoid complex procedures such as lifting and drilling, and simultaneously reduce the implementation operation difficulty.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
Fig. 1 is a schematic structural view of a gas measurement while drilling apparatus according to embodiment 1 of the present invention.
Fig. 2 is a sectional view taken along line a-a in fig. 1.
Fig. 3 is a schematic view of a directional drilling tool according to embodiment 2 of the present invention.
Fig. 4 is a flowchart of a measurement method described in embodiment 3 of the present invention.
The reference numerals in the figures denote:
1-drill bit, 2-screw drill, 3-gas measuring device, 4-track measuring instrument, 5-cable drill rod, 6-water or air feeder, 7-orifice monitor, 8-drill hole wall;
31-a gas measuring unit, 32-a packing unit and 33-a controller;
311-a first outer pipe, 312-a probe, 313-a sealed cavity, 314-a first control valve, 315-a gas pressure sensor, 316-a gas concentration sensor, 317-an exhaust fan, 318-a support body;
3121-main section, 3122-flange section, 3123-first through hole;
321-second outer tube, 322-rubber cylinder, 323-second control valve, 324-third control valve.
The details of the present invention are explained in further detail below with reference to the drawings and the detailed description.
Detailed Description
The high-pressure medium in the invention refers to high-pressure water or high-pressure gas.
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all equivalent changes based on the technical solutions of the present invention are within the protection scope of the present invention.
In the present invention, unless otherwise specified, the use of the terms of orientation such as "upper, lower, left, and right" generally means defined with reference to the drawing plane of the corresponding drawing, and "inner and outer" means defined with reference to the outline of the corresponding drawing.
Example 1
The embodiment discloses a gas measurement device while drilling for directional drilling in an underground coal mine, which comprises a gas measurement unit 31 and a packing unit 32 for sealing a gap between the gas measurement unit 31 and a borehole wall 8, as shown in fig. 1;
the gas measurement unit 31 includes a first outer tube 311 and a probe tube 312 disposed in the first outer tube 311, and a gap through which a high-pressure medium flows is provided between the probe tube 312 and the first outer tube 311.
In this embodiment, the probe 312 is a section of copper rod, and is a structure of a known probe in the market, and a transmission wire and a data processing chip are disposed in the copper pipe. The first outer tube 311 is made of non-magnetic steel.
A section of sealed cavity 313 for storing gas is arranged between the outer wall of the probe tube 312 and the inner wall of the first outer tube 311. Specifically, the probe tube 312 of the present embodiment includes a main body segment 3121 and a flange segment 3122, and a gap for flowing a high-pressure medium is provided between an outer wall of the main body segment 3121 and an inner wall of the first outer tube 311. The outer diameter of the flange section 3122 matches the inner diameter of the first outer tube 311, so that the outer wall of the flange section 3122 is in tight sealing contact with the inner wall of the first outer tube 311, and the side surface of the flange section 3122 is provided with a groove which forms a sealing cavity 313 with the inner wall of the first outer tube 311. And a first through hole 3123 penetrating in the high pressure medium flow direction is provided on the flange section 3122 for the circulation of the high pressure medium.
Specifically, as shown in fig. 2, the first through holes 3123 are groove-shaped, and the first through holes 3123 are uniformly provided in plurality along the circumferential direction of the flange section 3122. And the first through hole 3123 is offset from the groove on the flange section 3122.
A gas pressure sensor 315, a gas concentration sensor 316 and an exhaust fan 317 are arranged in the sealed cavity 313 and are connected with a transmission lead in the probe 312.
In order to increase the stability of the probe tube 312, a support body 318 for supporting the probe tube 312 is disposed in the first outer tube 311, and the support body 318 is specifically an annular support fixed on the inner wall of the first outer tube 311.
The packing unit 32 of the present invention can seal the hole bottom by using the existing sealing structure and method, and then measure the gas in the sealed hole bottom by using the gas measuring unit. However, the present invention preferably adopts the following configuration of the packing unit 2.
The packing unit 32 in this embodiment includes a second outer tube 321, a rubber tube 322 that can expand under the pressure of the high-pressure medium, a second control valve 323, and a third control valve 324 for controlling the high-pressure medium in the second outer tube 321 to flow to the first outer tube 311.
The second outer tube 321 is in butt joint with the first outer tube 311, the rubber tube 322 is sleeved on the outer wall of the second outer tube 321, specifically, a section of groove is arranged on the outer wall of the second outer tube 321, and the depth of the groove is the same as the thickness of the rubber tube 322 when the groove is not deformed. The rubber sleeve 322 in this embodiment is made of elastic rubber with good elongation and good shear resistance.
A second through hole (not shown) is formed in the pipe wall of the second outer pipe 321 where the rubber cylinder 322 is disposed, the second through hole is communicated to the rubber cylinder 322, and a second control valve 323 is disposed in the second through hole. When the second control valve 323 is opened, the high-pressure medium enters the interior of the rubber cylinder 322 through the second through hole, so that the rubber cylinder 322 expands, and when the expansion pressure reaches a certain value, the rubber cylinder 322 generates enough expansion amount to tightly contact with the hole wall 8 of the drilled hole to realize sealing.
Furthermore, in order to increase the wear resistance of the rubber sleeve 322, a protective layer is designed outside the rubber sleeve 322, the protective layer can deform along with the rubber sleeve 322, and the protective layer outside the rubber sleeve 322 is made of elastic rubber with good wear resistance.
In order to facilitate the control of the valves, a controller 33 is disposed in the second outer tube 321, functional modules such as a communication interface, a control CPU module, and a data storage module are disposed in the controller 33, and the controller 33 is configured to control the first control valve 314, the second control valve 323, and the third control valve 324 to open and close and the exhaust fan 317 to operate and stop. And a gap through which the high pressure medium passes is provided between the controller 33 and the inner wall of the second outer tube 321.
Specifically, the first control valve 314, the second control valve 323, and the third control valve 324 in the present embodiment are all commercially available solenoid valves.
Specifically, the controller 33 is a rod-shaped structure, the controller 33 is connected to the probe 312, the second control valve 323 is connected to an intermediate position of the controller 33, and the third control valve 324 is connected to one end of the controller 33 connected to the probe 312.
The controller 33 of the present embodiment may be connected to the orifice monitor 7 through a cable, and receive the command signal sent by the orifice monitor 7 to control each valve and the exhaust fan to implement a corresponding command operation.
Example 2
The embodiment discloses a directional drilling tool for underground coal mines, and as shown in fig. 3, the directional drilling tool comprises a drill bit 1, a screw drilling tool 2, a gas measuring device 3, a track measuring instrument 4 and a cable drill rod 5 which are sequentially connected, wherein the gas measuring device 3 is described in the embodiment 1.
Wherein, the first outer tube 311 of the gas measurement unit 31 is connected with the screw drill 2, and the second outer tube 321 of the packing unit 32 is connected with the outer tube of the trajectory measuring instrument 5.
The gas measuring device of the embodiment is connected to a drilling tool, extends into a drilling hole together with the drilling tool, and measures gas parameters in real time at a preset position according to requirements in directional long drilling construction.
This embodiment realizes power supply and signal transmission through wired cable mode, can provide reliable work energy source for downthehole instrument, and signal transmission is stable.
In addition, a water or air feeder 6 may be connected to the top of the drill rod 5 for feeding high pressure water or gas into the drill.
Example 3
The embodiment discloses a method for measuring gas while drilling in coal mine underground directional drilling, which adopts a directional drilling tool recorded in embodiment 2 to perform drilling and gas measurement, and a flow chart is shown in figure 4, and the method specifically comprises the following steps:
step 1, when the drilling tool drills in the hole, the packing unit 32 does not operate (that is, the second control valve 323 in this embodiment is closed, the second through hole is in a non-conducting state), the third control valve 324 is in an open state, the high-pressure medium flows into the screw drilling tool 2 through the gap between the probe 312 and the first outer tube 311 in the gas measurement unit 31, the screw drilling tool 2 is driven to operate to perform directional drilling construction, the drilling trajectory data is measured by the trajectory measurement instrument 4 and sent to the orifice monitor 7, and trajectory control is performed on the constructed directional drilling.
And 2, stopping drilling when the drilling reaches a preset depth or position, relieving pressure in the drilling tool (namely, not introducing high-pressure medium), and sealing the gap between the gas measurement unit and the hole wall 8 of the drilled hole by using a packing unit 32. The specific method for sealing the gap between the gas measurement unit 31 and the borehole wall 8 by the packing unit 32 in this embodiment is as follows:
the operation orifice monitor 7 sends a 'setting' command, and the controller 33 receives the command and controls the third control valve 324 to close and opens the second control valve 323; then, high-pressure medium is input again through the orifice, the high-pressure medium enters the rubber cylinder 322 through the second through hole, the rubber cylinder 322 is extruded to expand, and when the expansion pressure reaches a certain value, the outer wall of the rubber cylinder 322 is in close contact with the hole wall 8 of the drilled hole to realize sealing.
and (3) releasing pressure in the drilling tool, wherein the expanded rubber sleeve 322 is also released through the second control valve 323, and the rubber sleeve 322 is gradually separated from the wall 8 of the drilled hole until the rubber sleeve 322 is contracted and returns to the normal state.
In step 5, the operation port monitor 7 issues an "exhaust" command, the exhaust fan 317 is started to operate, and the first control valve 314 is closed after the gas in the sealed chamber 313 is exhausted. And the running time is determined according to the size of the sealing cavity and the actual working condition.
And 6, after the gas measurement work is finished, continuing the directional drilling according to the step 1, and during the drilling process, if the gas at the bottom of the hole needs to be measured, measuring the gas parameters according to the steps 2 to 5.
The device and the method can realize real-time measurement of the gas parameters at the preset position according to requirements in directional long drilling construction, can calculate and analyze the occurrence gas condition of the coal bed according to the parameter change condition, have timeliness, and ensure the accuracy and reliability of the measured data. Meanwhile, complex procedures such as lifting and lowering the drill can be avoided, and the implementation operation difficulty is reduced.
In the above description, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be understood broadly, and may be, for example, fixedly connected or detachably connected or integrated; either a direct connection or an indirect connection, and the like. The specific meaning of the above terms in the present technical solution can be understood by those of ordinary skill in the art according to specific situations.
The respective specific technical features described in the above-described embodiments may be combined in any suitable manner without contradiction as long as they do not depart from the gist of the present invention, and should also be regarded as being disclosed in the present invention.
Claims (9)
1. The coal mine underground directional drilling gas measurement while drilling device is characterized by comprising a gas measurement unit (31) and a packing unit (32) for sealing a gap between the gas measurement unit (31) and a drill hole wall (8);
the gas measurement unit (31) comprises a first outer pipe (311) and a probe pipe (312) arranged in the first outer pipe (311), and a gap for high-pressure medium to flow through is arranged between the probe pipe (312) and the first outer pipe (311);
a section of sealed cavity (313) used for storing gas is arranged between the outer wall of the probe tube (312) and the inner wall of the first outer tube (311), a gas inlet hole communicated with the sealed cavity (313) is arranged on the tube wall of the first outer tube (311), and a first control valve (314) is arranged in the gas inlet hole; and a gas pressure sensor (315), a gas concentration sensor (316) and an exhaust fan (317) are arranged in the sealed cavity (313).
2. The gas measurement while drilling device for directional drilling in the underground coal mine according to claim 1, wherein the probe tube (312) comprises a main body section (3121) and a flange section (3122), and a gap for flowing the high-pressure medium is arranged between the outer wall of the main body section (3121) and the inner wall of the first outer tube (311); the outer diameter of the flange section (3122) is matched with the inner diameter of the first outer pipe (311), the side surface of the flange section (3122) is provided with a groove, the groove and the inner wall of the first outer pipe (311) form the sealing cavity (313), and the flange section (3122) is provided with a first through hole (3123) which is through along the flowing direction of the high-pressure medium.
3. The gas measurement device while drilling for directional drilling in the underground coal mine according to claim 1 or 2, characterized in that a support body (318) for supporting the probe (312) is arranged in the first outer pipe (311).
4. The gas measurement while drilling device for directional drilling in the underground coal mine according to claim 1, wherein the packing unit (32) comprises a second outer pipe (321), a rubber cylinder (322) capable of expanding under the extrusion of a high-pressure medium, a second control valve (323) and a third control valve (324) for controlling the high-pressure medium in the second outer pipe (321) to flow to the first outer pipe (311);
the second outer pipe (321) is communicated with the first outer pipe (311); the rubber cylinder (322) is sleeved on the outer wall of the second outer pipe (321), a second through hole is formed in the pipe wall of the second outer pipe (321) where the rubber cylinder (322) is arranged, and a second control valve (323) is arranged in the second through hole.
5. The gas measurement while drilling device for directional drilling in the underground coal mine according to claim 4, wherein a controller (33) is arranged in the second outer pipe (321), and the controller (33) is used for controlling the opening and closing of the first control valve (314), the second control valve (323) and the third control valve (324) and the operation and the stop of the exhaust fan (317); and a gap for high-pressure medium to pass through is arranged between the controller (33) and the inner wall of the second outer pipe (321).
6. The gas measurement device while drilling for directional drilling in the underground coal mine according to claim 5, wherein the controller (33) is rod-shaped as a whole, the controller (33) is connected with the probe (312), the second control valve (323) is connected to the middle position of the controller (33), and the third control valve (324) is connected to one end of the controller (33) connected with the probe (312).
7. Coal mine underground directional drilling tool, including drill bit (1), screw rod drilling tool (2), orbit measuring apparatu (4), logical cable drilling rod (5) that connect gradually, its characterized in that still includes gas measuring device (3) of any one of claims 1 to 6, gas measuring device (3) connect between screw rod drilling tool (2) and orbit measuring apparatu (4), wherein, gas measuring unit (31) are connected with screw rod drilling tool (2), seal and separate unit (32) and be connected with orbit measuring apparatu (5).
8. The method for measuring gas while drilling in coal mine underground directional drilling is characterized in that the directional drilling tool as claimed in claim 7 is adopted for drilling and gas measurement, and the method specifically comprises the following steps:
step 1, when a drilling tool drills in a hole, a packing unit (32) does not operate, high-pressure medium flows into a screw drilling tool (2) through a gap between a probe pipe (312) and a first outer pipe (311) in a gas measuring unit (31), the screw drilling tool (2) is driven to operate to carry out directional drilling construction, drilling track data are measured through a track measuring instrument (4) and sent to an orifice monitor (7), and track control is carried out on the constructed directional drilling;
step 2, when drilling to a preset depth or position, stopping drilling, releasing pressure in the drilling tool, and sealing a gap between the gas measurement unit and the wall (8) of the drilled hole by using a packing unit (32);
step 3, opening a first control valve (314), enabling gas at the bottom of a sealed hole to enter a sealed cavity (313), measuring data of a gas pressure sensor (315) and a gas concentration sensor (316) and transmitting the data to an orifice monitor (7) in real time, and calculating and analyzing gas emission quantity and emission speed according to the change situation of the measuring data along with time;
step 4, after the test is finished, the gas pressure sensor (315) and the gas concentration sensor (316) stop measuring and sending data, and the packing unit (32) unpacks;
step 5, starting an exhaust fan (317) to operate, and closing a first control valve (314) after gas in a sealed cavity (313) is exhausted;
and 6, after the gas measurement work is finished, continuing directional drilling according to the step 1, and if the gas at the bottom of the hole needs to be measured, measuring the gas parameters according to the steps 2 to 5.
9. The method for measuring gas while drilling in underground directional drilling of coal mine according to claim 8, wherein the specific method for sealing the gap between the gas measuring unit (31) and the wall (8) of the borehole by the sealing unit (32) in the step 2 is as follows: closing the third control valve (324), opening the second control valve (323); inputting high-pressure medium again, wherein the high-pressure medium enters the rubber cylinder (322) through the second through hole, extruding the rubber cylinder (322) to expand, and when the expansion pressure reaches a certain value, the outer wall of the rubber cylinder (322) is tightly contacted with the wall (8) of the drilled hole to realize sealing;
the unsealing method of the encapsulation unit (32) in the step 4 comprises the following steps: and (4) releasing pressure in the drilling tool, wherein the expanded rubber sleeve (322) is also released through a second control valve (323) until the rubber sleeve (322) is contracted to recover the normal state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382243.1A CN111677495B (en) | 2020-05-08 | 2020-05-08 | Coal mine underground directional drilling while-drilling gas measuring device, drilling tool and measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010382243.1A CN111677495B (en) | 2020-05-08 | 2020-05-08 | Coal mine underground directional drilling while-drilling gas measuring device, drilling tool and measuring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111677495A true CN111677495A (en) | 2020-09-18 |
| CN111677495B CN111677495B (en) | 2023-08-15 |
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| CN112253094A (en) * | 2020-11-10 | 2021-01-22 | 北京合康科技发展有限责任公司 | Coal mine underground explosion-proof drilling track measurement and gas detection system and use method thereof |
| CN112523707A (en) * | 2020-12-03 | 2021-03-19 | 中煤科工集团重庆研究院有限公司 | Coal and gas outburst danger prediction while drilling device and prediction method thereof |
| CN113266347A (en) * | 2021-07-05 | 2021-08-17 | 中煤科工集团重庆研究院有限公司 | Near-bit coal seam gas parameter while-drilling comprehensive measurement device and method |
| CN114215507A (en) * | 2021-05-21 | 2022-03-22 | 华北科技学院(中国煤矿安全技术培训中心) | Gas pressure measuring device and method based on directional drilling machine |
| CN114233202A (en) * | 2021-11-22 | 2022-03-25 | 煤炭科学技术研究院有限公司 | Drill rod with cabin capable of automatically adjusting opening and closing state along with wind pressure |
| CN114251087A (en) * | 2021-11-22 | 2022-03-29 | 煤炭科学技术研究院有限公司 | Method and device for testing coal bed gas pressure based on borehole gas flow inversion |
| CN114251084A (en) * | 2021-11-22 | 2022-03-29 | 煤炭科学技术研究院有限公司 | Device and method for rapidly and continuously measuring gas flow of drilled hole while drilling |
| CN115059449A (en) * | 2022-06-22 | 2022-09-16 | 中煤科工集团西安研究院有限公司 | Underground coal mine self-identification multi-parameter near-bit measurement while drilling device and method |
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| CN113266347A (en) * | 2021-07-05 | 2021-08-17 | 中煤科工集团重庆研究院有限公司 | Near-bit coal seam gas parameter while-drilling comprehensive measurement device and method |
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| CN114251084B (en) * | 2021-11-22 | 2023-09-15 | 煤炭科学技术研究院有限公司 | Device and method for quickly and continuously measuring drilling gas flow while drilling |
| CN114233202B (en) * | 2021-11-22 | 2023-09-26 | 煤炭科学技术研究院有限公司 | Drill rod with cabin capable of automatically adjusting opening and closing states along with wind pressure |
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| CN115059449A (en) * | 2022-06-22 | 2022-09-16 | 中煤科工集团西安研究院有限公司 | Underground coal mine self-identification multi-parameter near-bit measurement while drilling device and method |
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