CN106401533B - Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination apparatus and method - Google Patents
Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination apparatus and method Download PDFInfo
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- CN106401533B CN106401533B CN201611054327.2A CN201611054327A CN106401533B CN 106401533 B CN106401533 B CN 106401533B CN 201611054327 A CN201611054327 A CN 201611054327A CN 106401533 B CN106401533 B CN 106401533B
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 244
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 122
- 238000005553 drilling Methods 0.000 title claims abstract description 114
- 238000002347 injection Methods 0.000 title claims abstract description 57
- 239000007924 injection Substances 0.000 title claims abstract description 57
- 239000012530 fluid Substances 0.000 title claims abstract description 54
- 239000003245 coal Substances 0.000 title claims abstract description 29
- 230000008030 elimination Effects 0.000 title claims abstract description 14
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims description 13
- 239000007788 liquid Substances 0.000 claims abstract description 88
- 239000007789 gas Substances 0.000 claims abstract description 41
- 238000004321 preservation Methods 0.000 claims description 3
- 230000037452 priming Effects 0.000 claims description 3
- 238000000605 extraction Methods 0.000 abstract description 12
- 238000003795 desorption Methods 0.000 abstract description 5
- 238000005065 mining Methods 0.000 abstract description 4
- 239000003034 coal gas Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 230000008033 biological extinction Effects 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling or insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
- E21B36/001—Cooling arrangements
-
- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Earth Drilling (AREA)
Abstract
Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device, including liquid nitrogen machine processed, liquid nitrogen storage tank, fluid injection nitrogen machine, temperature indicator and the first concordant drilling set gradually from left to right along regional verifying coal seam not up to standard, the drilling of the second concordant, the drilling of third concordant, the drilling of the 4th concordant, the 5th concordant drills and the drilling of the 6th concordant, and the bottom of liquid nitrogen storage tank is equipped with wheel；It is not up to standard that the present invention is suitable for the every propulsion 10-50m regionality verifying of stope, the case where there are extraction blank tapes using concordant hole pumping and mining gas, pass through the concordant drilling fluid injection nitrogen constructed, coal body is rapidly frozen using the low-temperature characteristics of liquid nitrogen (- 196 DEG C), build low temperature (0 DEG C or less) environment, inhibit coal gas desorption, reduce the release speed of gas and the desorption quantity of gas, realize rapid outburst elimination, extraction blank tape present in effective solution coal bed gas extraction, the extraction time is long, project amount and the big problem of cost, and improve the efficiency of coal mining activity.
Description
Technical field
The invention belongs to technical field of mine safety, and in particular to secondary use concordant drilling fluid injection chilled nitrogen coal body is quick
Extinction apparatus and method.
Background technique
China is big coal country in the world, and the demand of all kinds of heavy industry, light industry to coal is more and more, while China
It is the country that coal mine gas disaster is particularly acute, Gas Disaster accident brings huge property loss and human casualty accident.
According to " prevention and treatment coal and gas prominent regulation " every propulsion 10-50m of stope it is necessary to using working face predicted method
Regional verifying no less than twice is carried out, any of them one-time authentication is when having outburst danger, which, which should change, divides protrusion into
Danger zone (region is that regional verifying does not reach target area, and wherein inspection target has: gas pressure and gas bearing capacity, when
Gas bearing capacity >=Or gas pressure >=When, it is that verifying is not up to standard), therefore stopping is taken to promote, it carries out
The main reason for coal-bed gas extinction, region property verifies not phenomenon up to standard is: there are extraction blank tapes for coal-bed gas.At present
Verifying taken extinction measure not up to standard for regionality has the extraction of concordant drilling gas and stope advance exhaust to bore
The measures such as hole, shallow bore hole take out in advance, standing, but concordant drilling gas extracting result is bad, because having been influenced in extraction
Region, methane pressure gradient has been reduced to minimum, is difficult to extract gas out again in a short time；Stope advance exhaust bores
Extinctions measure, these measures such as hole, shallow bore hole take out in advance, standing increase construction volume, cost amount, run before to exhaust to drill a hole and shallow bore hole
Pre- take out takes a long time, and standing is easy induction and protrudes.
Summary of the invention
The present invention provides a kind of by fluid injection nitrogen fast freezing coal body, suppression to solve shortcoming in the prior art
Coal gas desorption, the release speed of reduction gas and the desorption quantity of gas processed, to realize rapid outburst elimination, to solve coal-bed gas
The secondary use concordant drilling fluid injection of extraction blank tape present in extraction, the problem that the extraction time is long, project amount and cost are big
Chilled nitrogen coal body rapid outburst elimination apparatus and method.
In order to solve the above technical problems, the fluid injection chilled nitrogen the present invention adopts the following technical scheme: secondary use concordant drills
Coal body rapid outburst elimination device, including liquid nitrogen machine processed, liquid nitrogen storage tank, fluid injection nitrogen machine, temperature indicator and along regionality verify
It is the first concordant drilling for being set gradually from left to right in coal seam not up to standard, the drilling of the second concordant, the drilling of third concordant, the 4th suitable
Layer drilling, the drilling of the 5th concordant and the drilling of the 6th concordant；
Liquid nitrogen machine, liquid nitrogen storage tank and fluid injection nitrogen motor spindle processed are equipped with wheel, liquid nitrogen machine, liquid nitrogen storage tank and fluid injection processed
Nitrogen machine is rolled on the track being connected in tunnel by wheel, and liquid nitrogen storage tank is externally provided with one layer of heat preservation layer, liquid nitrogen storage tank
Top be equipped with liquid inlet joint, the left bottom of liquid nitrogen storage tank is equipped with liquid outlet connector, and liquid nitrogen machine processed passes through first pipe and liquid
The liquid inlet joint of nitrogen storage tank connects, and first pipe is equipped with the first valve, and liquid inlet joint is equipped with the second valve, liquid outlet connector
It is equipped with third valve, liquid outlet connector is connect by second pipe with the inlet of fluid injection nitrogen machine, and second pipe is equipped with the 4th
Valve；
The drilling of first concordant, the drilling of the second concordant, the drilling of third concordant, the drilling of the 4th concordant, the 5th concordant drilling and the
Gas drainage pipe is equipped in the drilling of six concordants, the gas drainage pipe in the drilling of the first concordant is connected with first by third pipeline
Four-way, third pipeline are equipped with the 5th valve, and the second interface of the first four-way passes through the liquid outlet of the 4th pipeline and fluid injection nitrogen machine
Connection, the 4th pipeline are equipped with the 6th valve, and the third interface of the first four-way is connected with the 5th pipeline, and the 5th pipeline is equipped with the
Seven valves；The bottom hole of second concordant drilling is equipped with the first temperature sensor；
Gas drainage pipe in the drilling of third concordant is connected with the second four-way by the 6th pipeline, and the 6th pipeline is equipped with the
Eight valves, the second interface of the second four-way are connected with the 7th pipeline, and the 7th pipeline is equipped with the 9th valve, the third of the second four-way
Interface is connect by the 8th pipeline with the 4th interface of the first four-way；The bottom hole of 4th concordant drilling is sensed equipped with second temperature
Device；
Gas drainage pipe in the drilling of 5th concordant is connected with third four-way by the 9th pipeline, and the 9th pipeline is equipped with the
Ten valves, the second interface of third four-way are connected with the tenth pipeline, and the tenth pipeline is equipped with the 11st valve, and the of third four-way
Three interfaces are connect by the 11st pipeline with the 4th interface of the second four-way, and the 4th interface of third four-way is connected with the 12nd pipe
Road, the 12nd pipeline are equipped with the 12nd valve；The bottom hole of 6th concordant drilling is equipped with third temperature sensor；
Temperature indicator by data signal line respectively with the first temperature sensor, second temperature sensor and third temperature
Sensor connection.
It is tightly connected between first pipe and liquid inlet joint by the first variable diameter crossover sub, liquid outlet connector and second pipe
Between by the second variable diameter crossover sub be tightly connected.
The application method of secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device, comprising the following steps:
(1) fluid injection nitrogen time t is calculated；
(2) all pipelines and valve are not connected up to target area in regionality verifying, and detects the leakproofness of pipeline；
(3) it carries out note nitrogen operation: after closing all valves, opening the first valve and the second valve, then start liquid nitrogen processed
Machine touches liquid outlet connector with hand, when liquid outlet connector cools off, successively opens third valve, the 4th valve, the 6th valve, the 5th
Valve, the 8th valve and the tenth valve, priming nitrogen machine open simultaneously temperature indicator, observe showing on temperature indicator
Number；
(4) it is drilled by fluid injection nitrogen machine to the first concordant, liquid nitrogen, injection are injected in the drilling of third concordant and the drilling of the 5th concordant
After time is t, the 6th valve, the 5th valve, the 8th valve, the tenth valve and fluid injection nitrogen machine are closed, the first valve is then turned off
Door, the second valve, third valve, the 4th valve and liquid nitrogen machine processed；Then the registration on temperature indicator is observed, temperature display is worked as
Show that the temperature registration in the drilling of the second concordant, the drilling of the 4th concordant and the drilling of the 6th concordant is all down to 0 DEG C hereinafter, unloading on device
First concordant drilling in gas drainage pipe and third pipeline connection, third concordant drilling in gas drainage Guan Yu six manage
The connection in road and the 5th concordant drilling in nine pipeline of gas drainage Guan Yu connection, then by the first temperature sensor,
Second temperature sensor and third temperature sensor take out；When shown on temperature indicator the second concordant drilling, the 4th concordant bore
There is a temperature to be located at 0 DEG C or more in temperature registration in hole and the drilling of the 6th concordant, to the registration variation on temperature indicator
After slowly stopping, the 5th valve, the 7th valve, the 8th valve, the 9th valve, the tenth valve and the 11st valve are successively opened,
By concordant drill in gaseous nitrogen all be discharged, after nitrogen all discharge after, be again switched off the 5th valve, the 7th valve,
8th valve, the 9th valve, the tenth valve and the 11st valve, then repeatedly step (3)-(4), until on temperature indicator
Until registration is 0 DEG C or less.
The method of fluid injection nitrogen time t is calculated in step (1) are as follows: the fluid injection nitrogen rate V of fluid injection nitrogen machine, the section of the 4th pipeline
Product S, concordant drillable length are L, and concordant bore diameter is d, calculate the required time of each concordant drilling:, then take wherein minimum value be fluid injection nitrogen time t.
By adopting the above technical scheme, the invention has the following advantages: the present invention utilizes the nitrogen in air containing 71%
Resource produces liquid nitrogen, and by already present concordant drilling fluid injection nitrogen, the drilling of secondary use concordant utilizes the low of liquid nitrogen (- 196 DEG C)
Temperature characteristics are rapidly frozen coal body, build low temperature (0 DEG C or less) environment, inhibit coal gas desorption, can accomplish rapid outburst elimination, into
And safety and high efficiency, effective solution extraction blank tape, the problem that the extraction time is long, project amount is big and cost is big, and mention
The high efficiency of coal mining activity；When being also required to carry out note liquid nitrogen extinction in the other regions in tunnel, by liquid outlet connector and second
Pipeline is dismantled, mini train pull tank along the track in tunnel be moved to where, can be used in this way a tank be many places
Carry out note liquid nitrogen operation, save the cost, strong flexibility.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is the top view in coal seam and concordant drilling.
Specific embodiment
The fluid injection chilled nitrogen coal body rapid outburst elimination device as shown in Figure 1, secondary use concordant of the invention drills, including liquid processed
Nitrogen machine 1, liquid nitrogen storage tank 2, fluid injection nitrogen machine 3, temperature indicator 4 and 5 are verified along coal seam not up to standard from left-hand along regional
The first concordant that the right side is set gradually the 6, second concordant drilling 7, third concordant the 8, the 4th concordant that drills that drills drills the 9, the 5th concordant
Drilling 10 and the 6th concordant drilling 11,
Liquid nitrogen machine 1, liquid nitrogen storage tank 2 and 3 bottom of fluid injection nitrogen machine processed are equipped with wheel 12, liquid nitrogen machine 1 processed, liquid nitrogen storage tank
2 and fluid injection nitrogen machine 3 rolled on the track that is connected in tunnel by wheel 12 (for convenience of mobile liquid nitrogen machine 1 processed, liquid nitrogen storage
Tank 2 and fluid injection nitrogen machine 3 can pull these devices on track by the mini train in tunnel), liquid nitrogen storage tank 2 is externally provided with
One layer of heat preservation layer 14, the top of liquid nitrogen storage tank 2 are equipped with liquid inlet joint 15, and the left bottom of liquid nitrogen storage tank 2 is equipped with liquid and connects
First 16, liquid nitrogen machine 1 processed is connect by first pipe 17 with the liquid inlet joint 15 of liquid nitrogen storage tank 2, and first pipe 17 is equipped with the
One valve 18, liquid inlet joint 15 are equipped with the second valve 19, and liquid outlet connector 16 is equipped with third valve 20, and liquid outlet connector 16 passes through
Second pipe 21 is connect with the inlet of fluid injection nitrogen machine 3, and second pipe 21 is equipped with the 4th valve 22；
First concordant the 6, second concordant of drilling drilling 7, drilling the 8, the 4th concordant drilling the 9, the 5th concordant drilling of third concordant
10 and the 6th are equipped with gas drainage pipe in concordant drilling 11, and the gas drainage pipe in the first concordant drilling 6 passes through third pipeline
23 are connected with the first four-way 24, and third pipeline 23 is equipped with the 5th valve 25, and the second interface of the first four-way 24 passes through the 4th pipe
Road 26 is connect with the liquid outlet of fluid injection nitrogen machine 3, and the 4th pipeline 26 is equipped with the 6th valve 27, and the third interface of the first four-way 24 connects
It is connected to the 5th pipeline 28, the 5th pipeline 28 is equipped with the 7th valve 29；The bottom hole of second concordant drilling 7 is equipped with the first temperature sensing
Device；
Gas drainage pipe in third concordant drilling 8 is connected with the second four-way 31, the 6th pipeline 30 by the 6th pipeline 30
It is equipped with the 8th valve 32, the second interface of the second four-way 31 is connected with the 7th pipeline 33, and the 7th pipeline 33 is equipped with the 9th valve
The third interface of door 34, the second four-way 31 is connect by the 8th pipeline 35 with the 4th interface of the first four-way 24；4th concordant is bored
The bottom hole in hole 9 is equipped with second temperature sensor；
Gas drainage pipe in 5th concordant drilling 10 is connected with third four-way 37, the 9th pipeline 36 by the 9th pipeline 36
It is equipped with the tenth valve 38, the second interface of third four-way 37 is connected with the tenth pipeline 39, and the tenth pipeline 39 is equipped with the 11st
The third interface of valve 40, third four-way 37 is connect by the 11st pipeline 41 with the 4th interface of the second four-way 31, and the three or four
Logical 37 the 4th interface is connected with the 12nd pipeline 42, and the 12nd pipeline 42 is equipped with the 12nd valve 43；The drilling of 6th concordant
11 bottom hole is equipped with third temperature sensor；
Temperature indicator 4 by data signal line respectively with the first temperature sensor, second temperature sensor and third temperature
Spend sensor connection.
As shown in Fig. 2, label 44 is tunnel, 45 be goaf, and 46 be coal working face, and 47 drill for concordant, arrow institute
Show that direction is coal mining direction of propulsion, the present invention is located in tunnel, and the subterranean zone not up to standard to regional verifying is quickly disappeared
It is prominent；
The application method of secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device, comprising the following steps:
(1) it calculates needed for injecting liquid nitrogen in the first concordant drilling 6, the drilling 8 of third concordant and the 5th concordant drilling 10
Time；Fluid injection nitrogen rate V, the sectional area S of the 4th pipeline 26, drillable length L, the bore diameter d of fluid injection nitrogen machine 3, meter
Calculate the required time of each concordant drilling:, the first concordant drilling 6,8 and of third concordant drilling
The diameter d of 5th concordant drilling 10 is identical, and length L is different, so calculating separately out each concordant drilling needs the fluid injection nitrogen time,
Then take wherein minimum value be fluid injection nitrogen time t because the fluid injection nitrogen time required for each concordant drills is different, if taken most
Big value just will appear when the drilling of longest concordant fills liquid nitrogen, and shortest concordant drilling fills excessive liquid nitrogen already, excessive
Liquid nitrogen pipeline may be made to burst apart, cause safety accident, thus take wherein the smallest time as fluid injection nitrogen time t；
(2) after closing all valves, the first valve 18 and the second valve 19 are opened, then starts liquid nitrogen machine 1 processed, is touched with hand
Liquid outlet connector 16 is touched, when liquid outlet connector 16 cools off, successively opens third valve 20, the 4th valve 22, the 6th valve the 27, the 5th
Valve 25, the 8th valve 32 and the tenth valve 38, priming nitrogen machine 3 open simultaneously temperature indicator 4, observe temperature indicator
Registration on 4；
(3) liquid is injected to the first concordant drilling 6, the drilling 8 of third concordant and the 5th concordant drilling 10 by fluid injection nitrogen machine 3
Nitrogen closes the 6th valve 27, the 5th valve 25, the 8th valve 32, the tenth valve 38 and fluid injection nitrogen machine 3 after injection length is t,
Then the first valve 18, the second valve 19, third valve 20, the 4th valve 22 and liquid nitrogen machine 1 processed are turned off；Then temperature is observed
Registration on display 4, when shown on temperature indicator 4 second concordant drill the 7, the 4th concordant drilling 9 and the 6th concordant drilling
Temperature registration in 11 is all down to 0 DEG C hereinafter, unloading the company of the gas drainage pipe and third pipeline 23 in the first concordant drilling 6
Connect, third concordant drilling 8 in six pipeline 30 of gas drainage Guan Yu connection and the 5th concordant drilling 10 in gas take out
The connection of nine pipeline 36 of Guan Yu is adopted, then takes the first temperature sensor, second temperature sensor and third temperature sensor
Out；When the temperature registration for showing that the second concordant drills in the drilling 9 of the 7, the 4th concordant and the 6th concordant drilling 11 on temperature indicator 4
In have a temperature be located at 0 DEG C or more, after on temperature indicator 4 registration variation slowly stop after, successively open the 5th valve
25, the 7th valve 29, the 8th valve 32, the 9th valve 34, the tenth valve 38 and the 11st valve 40, by concordant drill in gas
The nitrogen of state is all discharged, and after nitrogen all discharge, is again switched off the 5th valve 25, the 7th valve 29, the 8th valve 32, the
Nine valves 34, the tenth valve 38 and the 11st valve 40, then repeatedly step (1)-(3), until the registration on temperature indicator 4
Until 0 DEG C or less.
The present embodiment not makes any form of restriction shape of the invention, material, structure etc., all according to this hair
Bright technical spirit any simple modification, equivalent change and modification to the above embodiments, belong to the technology of the present invention side
The protection scope of case.
Claims (2)
1. the application method of secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device, it is characterised in that:
The described secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device include liquid nitrogen machine processed, liquid nitrogen storage tank,
Fluid injection nitrogen machine, temperature indicator and the first concordant set gradually from left to right along regional verifying coal seam not up to standard are bored
Hole, the drilling of the second concordant, the drilling of third concordant, the drilling of the 4th concordant, the drilling of the 5th concordant and the drilling of the 6th concordant；
Liquid nitrogen machine, liquid nitrogen storage tank and fluid injection nitrogen motor spindle processed are equipped with wheel, liquid nitrogen machine, liquid nitrogen storage tank and fluid injection nitrogen machine processed
It is rolled on the track being connected in tunnel by wheel, liquid nitrogen storage tank is externally provided with one layer of heat preservation layer, the top of liquid nitrogen storage tank
Portion is equipped with liquid inlet joint, and the left bottom of liquid nitrogen storage tank is equipped with liquid outlet connector, and liquid nitrogen machine processed is deposited by first pipe and liquid nitrogen
The liquid inlet joint of storage tank connects, and first pipe is equipped with the first valve, and liquid inlet joint is equipped with the second valve, sets in liquid outlet connector
There is third valve, liquid outlet connector is connect by second pipe with the inlet of fluid injection nitrogen machine, and second pipe is equipped with the 4th valve；
The drilling of first concordant, the drilling of the second concordant, the drilling of third concordant, the drilling of the 4th concordant, the drilling of the 5th concordant and the 6th are suitable
Gas drainage pipe is equipped in layer drilling, the gas drainage pipe in the drilling of the first concordant is connected with the one or four by third pipeline
Logical, third pipeline is equipped with the 5th valve, and the second interface of the first four-way is connected by the liquid outlet of the 4th pipeline and fluid injection nitrogen machine
It connects, the 4th pipeline is equipped with the 6th valve, and the third interface of the first four-way is connected with the 5th pipeline, and the 5th pipeline is equipped with the 7th
Valve；The bottom hole of second concordant drilling is equipped with the first temperature sensor；
Gas drainage pipe in the drilling of third concordant is connected with the second four-way by the 6th pipeline, and the 6th pipeline is equipped with the 8th valve
Door, the second interface of the second four-way are connected with the 7th pipeline, and the 7th pipeline is equipped with the 9th valve, the third interface of the second four-way
It is connect by the 8th pipeline with the 4th interface of the first four-way；The bottom hole of 4th concordant drilling is equipped with second temperature sensor；
Gas drainage pipe in the drilling of 5th concordant is connected with third four-way by the 9th pipeline, and the 9th pipeline is equipped with the tenth valve
Door, the second interface of third four-way are connected with the tenth pipeline, and the tenth pipeline is equipped with the 11st valve, and the third of third four-way connects
Mouth is connect by the 11st pipeline with the 4th interface of the second four-way, and the 4th interface of third four-way is connected with the 12nd pipeline,
12nd pipeline is equipped with the 12nd valve；The bottom hole of 6th concordant drilling is equipped with third temperature sensor；
Temperature indicator by data signal line respectively with the first temperature sensor, second temperature sensor and third temperature sensing
Device connection；
It is tightly connected between first pipe and liquid inlet joint by the first variable diameter crossover sub, between liquid outlet connector and second pipe
It is tightly connected by the second variable diameter crossover sub；
The application method the following steps are included:
(1) fluid injection nitrogen time t is calculated；
(2) all pipelines and valve are not connected up to target area in regionality verifying, and detects the leakproofness of pipeline；
(3) it carries out note nitrogen operation: after closing all valves, opening the first valve and the second valve, then start liquid nitrogen machine processed, use
Hand touch liquid outlet connector, when liquid outlet connector cools off, successively open third valve, the 4th valve, the 6th valve, the 5th valve,
8th valve and the tenth valve, priming nitrogen machine open simultaneously temperature indicator, observe the registration on temperature indicator；
(4) it is drilled by fluid injection nitrogen machine to the first concordant, liquid nitrogen, injection length are injected in the drilling of third concordant and the drilling of the 5th concordant
After t, the 6th valve, the 5th valve, the 8th valve, the tenth valve and fluid injection nitrogen machine are closed, then turns off the first valve, the
Two valves, third valve, the 4th valve and liquid nitrogen machine processed；Then the registration on temperature indicator is observed, when on temperature indicator
Show that the temperature registration in the drilling of the second concordant, the drilling of the 4th concordant and the drilling of the 6th concordant is all down to 0 DEG C hereinafter, unloading first
Gas drainage Guan Yu six pipeline in the connection of gas drainage pipe and third pipeline in concordant drilling, the drilling of third concordant
Connection and the connection of nine pipeline of gas drainage Guan Yu in the drilling of the 5th concordant, then by the first temperature sensor, second
Temperature sensor and third temperature sensor take out；When shown on temperature indicator the second concordant drilling, the 4th concordant drilling and
There is a temperature to be located at 0 DEG C or more in temperature registration in the drilling of 6th concordant, it is slow to the registration variation on temperature indicator
After stopping, the 5th valve, the 7th valve, the 8th valve, the 9th valve, the tenth valve and the 11st valve are successively opened, it will be suitable
Gaseous nitrogen in layer drilling is all discharged, and after nitrogen all discharge, is again switched off the 5th valve, the 7th valve, the 8th
Valve, the 9th valve, the tenth valve and the 11st valve, then repeatedly step (3)-(4), until the registration on temperature indicator
Until 0 DEG C or less.
2. the user of secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device according to claim 1
Method, it is characterised in that: the method for fluid injection nitrogen time t is calculated in step (1) are as follows: the fluid injection nitrogen rate V of fluid injection nitrogen machine, the 4th pipeline
Sectional area S, concordant drillable length is L, and concordant bore diameter is d, calculates the required time of each concordant drilling: (3
лd2L)/(4SV), then take wherein minimum value be fluid injection nitrogen time t.
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| CN201611054327.2A CN106401533B (en) | 2016-11-25 | 2016-11-25 | Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination apparatus and method |
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| CN201611054327.2A CN106401533B (en) | 2016-11-25 | 2016-11-25 | Secondary use concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination apparatus and method |
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| CN106401533B true CN106401533B (en) | 2019-05-10 |
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| CN101105138A (en) * | 2007-08-15 | 2008-01-16 | 湖南科技大学 | Method for suppressing coal and gas outburst |
| CN104632271A (en) * | 2015-01-12 | 2015-05-20 | 中国矿业大学 | Method for increasing permeability in drilling holes in cold expansion and heat driving mode |
| WO2016112759A1 (en) * | 2015-01-12 | 2016-07-21 | 中国矿业大学 | Method for thermal-displacement-type strengthened extraction in drill hole |
| CN104963674A (en) * | 2015-07-17 | 2015-10-07 | 煤炭科学技术研究院有限公司 | Low permeability coal bed liquid nitrogen freeze thawing cracking permeability increasing method |
| CN205677660U (en) * | 2016-06-12 | 2016-11-09 | 河南理工大学 | System that a kind of hypotonic coal seam supercritical carbon dioxide is anti-reflection |
| CN206256898U (en) * | 2016-11-25 | 2017-06-16 | 河南理工大学 | Secondary utilization concordant drilling fluid injection chilled nitrogen coal body rapid outburst elimination device |
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