CN205089303U - Ground detonation coal layer fracture ware - Google Patents
Ground detonation coal layer fracture ware Download PDFInfo
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- CN205089303U CN205089303U CN201520914208.4U CN201520914208U CN205089303U CN 205089303 U CN205089303 U CN 205089303U CN 201520914208 U CN201520914208 U CN 201520914208U CN 205089303 U CN205089303 U CN 205089303U
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Abstract
The utility mode relates to a ground detonation coal layer fracture ware, exist when having solved current fracturing ware and using need the secondary filling, pressure energy is not enough, the fracturing time is short, cycle length and polluted stratum's problem. Combustion cylinder lid center is provided with the spark plug, and combustion cylinder body upper portion is provided with the combustion chamber, and combustion cylinder body lower part is provided with the gas passageway of impressing, and gas is impressed and is provided with piston and array output in the passageway, is provided with recoiling spring between array output and the piston, and is fixed with spacing annular diaphragm on the piston, has all opened gaseous drainage hole on spacing annular diaphragm and the array output, fuel supply system and liquid carbon dioxide feed system are fed through through the conveyer pipe by storage tank, booster pump, normally -closed solenoid valves, flowmeter to form in proper order, and fuel supply system's conveyer pipe end connection has an atomizer, the conveyer pipe tip and the gas of the liquid carbon dioxide feed system passageway intercommunication of impressing. The utility model discloses the effect that the realization was made seam, fracture extension and was filled the proppant the coal bed gas.
Description
Technical field
The utility model relates to coal-bed gas exploitation fracturing device, is specially a kind of ground detonation coal bed fracturing device.
Background technology
In coal-bed gas exploitation process, the method of main use is gas injecting mining method, gas injecting mining is exactly nitrogen injection in grey association cluster, the noninflammable nontoxic desorption gas of carbon dioxide geometric ratio coal bed gas high adsorption capacity, carrys out exploiting coal bed methane by the permeability in the pressure in increase coal seam and change coal seam.Continual injecting gas makes the gas pressure of mining area increase, and the barometric gradient of coal-bed methane seepage also increases thereupon, and thus the seepage flow speed in coal seam also increases.Seepage flow speed increases and causes coal bed gas dividing potential drop fall off rate quickening in hole, thus causes the coal bed gas desorb being adsorbed in coal seam more.
Tradition fracturing equipment in use, external device (ED) point of ignition gunpowder, the high-temperature gas that ignition charge produces makes liquid carbon dioxide gasify rapidly, carbon dioxide after gasification makes pressure in fracturing equipment tube wall sharply rise, diaphragm breaks through by higher pressure, gases at high pressure flow in operation vertical shaft, thus complete a pressure break; Following defect is there is: single uses, and before reusing, all needs to pour into liquid carbon dioxide in advance at every turn during use, it is high that single fracturing equipment produces pressure peak, pulse width, and total energy is less, transient state destructive power is large, continues pressure break energy shortage, is all many fracturing equipment series connection usually in use; After fracturing equipment is finished using, the high pressure gas cognition produced due to blast makes fracturing equipment vertical tube buried in coal seam, and need manually take out, this is also the engineering taken time and effort.
Summary of the invention
The utility model needs re-filling, pressure energy deficiency to exist when solving the use of existing fracturing equipment, the pressure break time is short, the cycle long and the problem on pollution stratum, provides a kind of ground detonation coal bed fracturing device.
The utility model adopts following technical scheme to realize: ground detonation coal bed fracturing device, comprises three groups of fuel feed systems, one group of liquid carbon dioxide feed system and combustion system, combustion system comprises the burning cylinder body be connected with coal bed gas vertical shaft, burning cylinder cover has burning cylinder cap, burning cylinder cap center is provided with spark plug, burning cylinder body top is provided with combustion chamber, burning inferior part of the cylinder block is provided with the gas be communicated with coal bed gas vertical shaft with combustion chamber and is pressed into passage, be provided with piston in gas press-in passage and be positioned at below it and be pressed into gas the supporting baffle that passage fixes, the tensioner spring be connected with both is provided with between supporting baffle with piston, and piston is fixed with the spacing toroidal membrane being pressed into vias inner walls with gas and being close to, spacing toroidal membrane and supporting baffle all have gas conduction hole corresponding to some upper-lower positions, fuel supply system liquid carbon dioxide feed system of unifying is all to be communicated with successively by carrier pipe by storage tank, booster pump, normally closed solenoid valve, flow meter to form, be connected with atomizer between the carrier pipe end of fuel feed system and combustion chamber, the gas below the carrier pipe end of liquid carbon dioxide feed system and supporting baffle is pressed into channel connection.
During operation, be placed with ammonium nitrate, G & W respectively in the storage tank of fuel feed system, first the measuring pump of liquid towards carbon dioxide feed system pressurizes, after pressure reaches certain value, open its normally closed solenoid valve, the liquid carbon dioxide after pressurization is pressed in vertical shaft, then the ammonium nitrate booster pump in control fuel feed system and glycerine booster pump give ammonium nitrate and glycerine pressurization simultaneously respectively, two kinds of liquid are respectively when flowing through atomizer, be injected in combustion chamber because of pipe inner high voltage rapid atomization, two kinds of gases are mixed to form combustion mixture in combustion chamber, along with the continuous firing of its booster pump, combustion mixture in combustion chamber is compressed, pressure and temperature rise thereupon, be increased to certain pressure in combustion chamber after, after the water booster pump of fuel feed system is filled with the mixing of the water after atomization in combustion chamber, plug ignition, ammonium nitrate and glycerine gaseous mixture vigorous combustion, burning interior temperature, pressure sharply rises, the pressure that gases at high pressure produce acts on piston, piston press tensioner spring is produced rapidly to bottom offset, gases at high pressure flow into rapidly in coal bed gas vertical shaft from combustion chamber and piston clearance, gases at high pressure in press-in coal bed gas force the liquid carbon dioxide in vertical shaft to enter in coal seam and produce pressure break to it, and after gases at high pressure enter into vertical shaft, the pressure produced can produce to lifting force piston, final piston resets completely, fracturing process completes, overcome existence when existing fracturing equipment uses and need re-filling, pressure energy is not enough, the pressure break time is short, cycle is grown and pollutes the problem on stratum.
The utility model reasonable in design is reliable, continue to inject by supercharging uninterrupted in lithosphere vertical shaft and liquid carbon dioxide, realize the effect of coal bed gas being made to seam, fracture extension and filling proppant, and filling without the need to repeating, while ensureing pressure break quality, improve operating efficiency.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the schematic top plan view of spacing toroidal membrane in Fig. 1.
In figure: 1-burns cylinder body, 2-burns cylinder cap, 3-spark plug, 4-combustion chamber, 5-gas press-in passage, 6-piston, 7-supporting baffle, 8-tensioner spring, the spacing toroidal membrane of 9-, 10-gas conduction hole, 11-storage tank, 12-booster pump, 13-normally closed solenoid valve, 14-flow meter, 15-carrier pipe, 16-atomizer.
Detailed description of the invention
Ground detonation coal bed fracturing device, comprises three groups of fuel feed systems, one group of liquid carbon dioxide feed system and combustion system, combustion system comprises the burning cylinder body 1 be connected with coal bed gas vertical shaft, burning cylinder body 1 is stamped deflagrating jar lid 2, burning cylinder cap 2 center is provided with spark plug 3, burning cylinder body 1 top is provided with combustion chamber 4, burning cylinder body 1 bottom is provided with the gas be communicated with coal bed gas vertical shaft with combustion chamber 4 and is pressed into passage 5, be provided with piston 6 in gas press-in passage 5 and be positioned at below it and be pressed into gas the supporting baffle 7 that passage 5 fixes, the tensioner spring 8 be connected with both is provided with between supporting baffle 7 with piston 6, and piston 6 is fixed with the spacing toroidal membrane 9 being pressed into passage 5 inwall with gas and being close to, spacing toroidal membrane 9 and supporting baffle 7 all have gas conduction hole 10 corresponding to some upper-lower positions, fuel supply system liquid carbon dioxide feed system of unifying is all to be communicated with successively by carrier pipe 15 by storage tank 11, booster pump 12, normally closed solenoid valve 13, flow meter 14 to form, be connected with atomizer 16 between carrier pipe 15 end of fuel feed system and combustion chamber 4, carrier pipe 15 end of liquid carbon dioxide feed system is pressed into passage 5 with the gas below supporting baffle 7 and is communicated with.
In specific implementation process, piston 6 for top be the piston of cone structure; Spark plug 3, flow meter 14, normally closed solenoid valve 13, booster pump 12 all control by control system, realize pressure stabilizing equipment fuel and automatically supply.
Claims (1)
1. a ground detonation coal bed fracturing device, is characterized in that: comprise three groups of fuel feed systems, one group of liquid carbon dioxide feed system and combustion system, combustion system comprises the burning cylinder body (1) be connected with coal bed gas vertical shaft, deflagrating jar lid (2) is stamped in burning cylinder body (1), burning cylinder cap (2) center is provided with spark plug (3), burning cylinder body (1) top is provided with combustion chamber (4), burning cylinder body (1) bottom is provided with the gas be communicated with coal bed gas vertical shaft with combustion chamber (4) and is pressed into passage (5), be provided with piston (6) in gas press-in passage (5) and be positioned at below it and be pressed into gas the supporting baffle (7) that passage (5) fixes, the tensioner spring (8) be connected with both is provided with between supporting baffle (7) with piston (6), and piston (6) is fixed with the spacing toroidal membrane (9) being pressed into passage (5) inwall with gas and being close to, spacing toroidal membrane (9) and supporting baffle (7) all have gas conduction hole (10) corresponding to some upper-lower positions, fuel supply system liquid carbon dioxide feed system of unifying is all to be communicated with successively by carrier pipe (15) by storage tank (11), booster pump (12), normally closed solenoid valve (13), flow meter (14) to form, be connected with atomizer (16) between carrier pipe (15) end of fuel feed system and combustion chamber (4), carrier pipe (15) end of liquid carbon dioxide feed system is pressed into passage (5) with the gas of supporting baffle (7) below and is communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520914208.4U CN205089303U (en) | 2015-11-17 | 2015-11-17 | Ground detonation coal layer fracture ware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520914208.4U CN205089303U (en) | 2015-11-17 | 2015-11-17 | Ground detonation coal layer fracture ware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205089303U true CN205089303U (en) | 2016-03-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520914208.4U Expired - Fee Related CN205089303U (en) | 2015-11-17 | 2015-11-17 | Ground detonation coal layer fracture ware |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205089303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025938A (en) * | 2018-06-22 | 2018-12-18 | 中国矿业大学 | A kind of underground coal mine multistage combustion shock wave fracturing coal body reinforcing gas pumping method |
-
2015
- 2015-11-17 CN CN201520914208.4U patent/CN205089303U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109025938A (en) * | 2018-06-22 | 2018-12-18 | 中国矿业大学 | A kind of underground coal mine multistage combustion shock wave fracturing coal body reinforcing gas pumping method |
| CN109025938B (en) * | 2018-06-22 | 2020-07-24 | 中国矿业大学 | Method for reinforcing gas extraction of coal body fractured by multistage combustion shock wave under coal mine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160316 Termination date: 20161117 |