CN103075180B - Gas-liquid two-phase jet slotting system and method - Google Patents
Gas-liquid two-phase jet slotting system and method Download PDFInfo
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- CN103075180B CN103075180B CN201310013864.2A CN201310013864A CN103075180B CN 103075180 B CN103075180 B CN 103075180B CN 201310013864 A CN201310013864 A CN 201310013864A CN 103075180 B CN103075180 B CN 103075180B
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Abstract
The invention discloses a gas-liquid two-phase jet slotting system and a gas-liquid two-phase jet slotting method. An ejector is used for realizing an ejection function for high-pressure air delivered by a high-pressure air source, high-pressure water and the high-pressure air are mixed in a pressure-proof sleeve to form gas-liquid two-phase jet flow, and the gas-liquid two-phase jet flow is delivered to a slotting drill bit by a high-pressure water swivel to slot a coal body. By the gas-liquid two-phase jet flow, the jet cutting capability can be effectively improved, the air permeability of a coal bed can be improved under the condition of reducing the working pressure of the system, and a favorable condition can be created for the gas drainage and extraction of the coal bed; and the system and the method are high in practicability.
Description
Technical field
The present invention relates to a kind of jet slotting system and method, especially a kind of down-hole bubble-liquid two-phase jet slotting system and method for being applicable to.
Background technology
In the coal mining industry of China, along with the increase of mining depth, geostatic stress raises, gas pressure increases, and Gas Disaster is on the rise, and the regional gas control method of taking out in advance coal-bed gas has obtained application more and more widely.Conventional way be to coal seam hole and jetting type slot to improve gas permeability of coal seam and extracting result.At present, common pure water jets slot application is comparatively extensive, and pure water jets slot exists easy plug-hole in application process at the scene, suppresses hole phenomenon, and need during pure water jets slot larger pump station pressure just can reach desirable cutting effect, cause in slot process and exist potential safety hazard.
Summary of the invention
Technical problem: the object of the invention is to overcome the weak point in prior art, a kind of simple in structure, easy to operate, bubble-liquid two-phase jet slotting system with stronger cutting power is provided.
Technical scheme: bubble-liquid two-phase jet slotting system of the present invention, comprise high-pressure water, rig, drilling rod, seam cutting drill bit, on described drilling rod, be provided with water under high pressure pigtail, water under high pressure pigtail is connected with high-pressure water by the road, the pipeline of high-pressure water is provided with reducing valve, on the pipeline of reducing valve front portion, through threeway, be connected with injector, described injector comprises withstand voltage sleeve, be located at the High pressure water jet nozzle at withstand voltage sleeve top, the sidewall of withstand voltage sleeve is provided with the pressure-air ejector being connected with high-pressure air source, High pressure water jet nozzle entrance and relative the meeting at right angles of pressure-air ejector entrance, the injector outlet of injector is connected with water under high pressure pigtail by the road.
Described pressure-air ejector and high-pressure air source connecting line are provided with one way valve.
Bubble-liquid two-phase jet slot method of the present invention, comprises the steps:
A, control high-pressure water, water under high pressure enters respectively reducing valve and injector through threeway;
B, the water under high pressure that enters reducing valve enter water under high pressure pigtail after reducing valve decompression;
C, the water under high pressure entering in injector spray through High pressure water jet nozzle, produce negative pressure, and the pressure-air being provided by high-pressure air source is produced to ejector action, and pressure-air enters injector from pressure-air ejector;
After mixing in the withstand voltage sleeve of injector with pressure-air, d, water under high pressure form bubble-liquid two-phase jet, through injector outlet, enter water under high pressure pigtail, after again mixing with the water under high pressure that enters water under high pressure pigtail through reducing valve, enter the drilling rod being fixed on rig, by drill pipe bore, enter seam cutting drill bit injection coal body is carried out to slot.
Beneficial effect: compared with the prior art, major advantage has in the present invention:
The two-phase mixing jet of the water and air of a, formation, carries out cavitation erosion and pulsating water hammering blow to coal body, can effectively improve jet cutting power, can increase gas permeability of coal seam, for coal bed gas drainage and extraction provide advantage.
B, guaranteeing, under the prerequisite of slot effect, can effectively to reduce the pressure of system works, improve safety;
C, guaranteeing under the prerequisite of slot effect, by introducing air, can effectively reduce water supply volume, reducing the generation of suppressing hole, spray orifice phenomenon, improving the safety in operation process simultaneously, thering is practicality widely.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is ejector structure schematic diagram of the present invention.
In figure: high-pressure water-1, reducing valve-2, injector-3, water under high pressure pigtail-4, high-pressure air source-5, threeway-6, one way valve-7, rig-8, drilling rod-9, seam cutting drill bit-10, High pressure water jet nozzle-11, withstand voltage sleeve-12, pressure-air ejector-13.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
As shown in Figure 1, bubble-liquid two-phase jet slotting system of the present invention, mainly by high-pressure water 1, injector 3, water under high pressure pigtail 4, high-pressure air source 5, rig 8, drilling rod 9, seam cutting drill bit 10, High pressure water jet nozzle 11, withstand voltage sleeve 12, pressure-air ejector 13, formed, on described drilling rod 9, be provided with water under high pressure pigtail 4, water under high pressure pigtail 4 is connected with drilling rod 9, water under high pressure pigtail 4 is arranged on rig 8 with drilling rod 9, and seam cutting drill bit 10 is arranged on drilling rod 9.Water under high pressure pigtail 4 is connected with high-pressure water 1 by the road, the pipeline of high-pressure water 1 is provided with threeway 6, two other outlet of threeway 6 is connected with the High pressure water jet nozzle 11 of reducing valve 2 and injector 3 respectively, described injector 3 comprises withstand voltage sleeve 12, be located at the High pressure water jet nozzle 11 at withstand voltage sleeve 12 tops, the sidewall of withstand voltage sleeve 12 is provided with the pressure-air ejector 13 being connected with high-pressure air source 5, described pressure-air ejector 13 is provided with one way valve 7 with high-pressure air source 5 connecting lines, described High pressure water jet nozzle 11 entrances and relative the meeting at right angles of pressure-air ejector 13 entrances, the outlet of injector 3 is connected with water under high pressure pigtail 4 by the road.The outlet of reducing valve 2 is connected with water under high pressure pigtail 4, and the pressure-air ejector 13 of injector 3 is connected with high-pressure air source 5.Described injector 3 is by High pressure water jet nozzle 11, withstand voltage sleeve 12, pressure-air ejector 13 forms, the high-pressure spray that the water under high pressure that the outlet that threeway 6 is connected with injector 3 is flowed out forms through High pressure water jet nozzle 11 forms ejector action to the pressure-air in pressure-air ejector 13, and mixes at the interior gas-liquid two-phase of realizing of withstand voltage sleeve 12.
As shown in Figure 2, injector 3 is mainly comprised of High pressure water jet nozzle 11, withstand voltage sleeve 12 and pressure-air ejector 13, the media outlet close proximity of High pressure water jet nozzle 11 and pressure-air ejector 13, High pressure water jet nozzle 11 is all fixed on withstand voltage sleeve 12 with pressure-air ejector 13.
Bubble-liquid two-phase jet slot method of the present invention:
A, control high-pressure water 1, the water under high pressure of high-pressure water 1 flows to threeway 6, and enters respectively reducing valve 2 and injector 3 from threeway 6 two other outlets;
B, the water under high pressure that enters reducing valve 2 enter water under high pressure pigtail 4 after reducing valve 2 decompressions;
C, the water under high pressure entering in injector 3 spray through High pressure water jet nozzle 11, produce negative pressure, and the pressure-air being provided by high-pressure air source 5 is produced to ejector action, and pressure-air enters injector (3) from pressure-air ejector 13; Water under high pressure flows into from High pressure water jet nozzle 11, form high-pressure spray and spurt into withstand voltage sleeve 12, the pressure-air that the negative pressure that the high-pressure spray that utilizes High pressure water jet nozzle 11 to form causes provides the high-pressure air source 5 in pressure-air ejector 13 forms ejector action makes pressure-air flow into withstand voltage sleeve 12 from the media outlet of pressure-air ejector 13, described in prevent the backflow of pressure-air ejector 13 inner high voltage air.Water under high pressure flows out in interior mixing by the outlet of injector 3 of withstand voltage sleeve 12 with pressure-air;
D, water under high pressure form bubble-liquid two-phase jet at the withstand voltage sleeve 12 of injector 3 after interior mixing with pressure-air, outlet through injector 3 enters water under high pressure pigtail 4, after again mixing with the water under high pressure that enters water under high pressure pigtail 4 through reducing valve 2, enter the drilling rod 9 being fixed on rig 8, by drilling rod 9 endoporus, enter seam cutting drill bit 10 injections coal body is carried out to slot.The high-pressure spray that the water under high pressure that the outlet that threeway 6 is connected with injector 3 is flowed out forms through High pressure water jet nozzle 11, forms ejector action to the pressure-air in pressure-air ejector 13, and mixes at the interior gas-liquid two-phase of realizing of withstand voltage sleeve 12.
Claims (3)
1. a bubble-liquid two-phase jet slotting system, comprise high-pressure water (1), rig (8), drilling rod (9), seam cutting drill bit (10), it is characterized in that: on described drilling rod (9), be provided with water under high pressure pigtail (4), water under high pressure pigtail (4) is connected with high-pressure water (1) by the road, the pipeline of high-pressure water (1) is provided with reducing valve (2), on the pipeline of reducing valve (2) front portion, through threeway (6), be connected with injector (3), described injector (3) comprises withstand voltage sleeve (12), be located at the High pressure water jet nozzle (11) at withstand voltage sleeve (12) top, the sidewall of withstand voltage sleeve (12) is provided with the pressure-air ejector (13) being connected with high-pressure air source (5), High pressure water jet nozzle (11) entrance and relative the meeting at right angles of pressure-air ejector (13) entrance, the outlet of injector (3) is connected with water under high pressure pigtail (4) by the road.
2. a kind of bubble-liquid two-phase jet slotting system according to claim 1, is characterized in that: described pressure-air ejector (13) is provided with one way valve (7) with high-pressure air source (5) connecting line.
3. a bubble-liquid two-phase jet slot method for system as claimed in claim 1 or 2, is characterized in that comprising the steps:
A, control high-pressure water (1), water under high pressure enters respectively reducing valve (2) and injector (3) through threeway (6);
B, the water under high pressure that enters reducing valve (2) enter water under high pressure pigtail (4) after reducing valve (2) decompression;
C, the water under high pressure entering in injector (3) spray through High pressure water jet nozzle (11), produce negative pressure, and the pressure-air being provided by high-pressure air source (5) is produced to ejector action, and pressure-air enters injector (3) from pressure-air ejector (13);
After mixing in the withstand voltage sleeve (12) of injector (3) with pressure-air, d, water under high pressure form bubble-liquid two-phase jet, outlet through injector (3) enters water under high pressure pigtail (4), after again mixing with the water under high pressure that enters water under high pressure pigtail (4) through reducing valve (2), enter the drilling rod (9) being fixed on rig (8), by drilling rod (9) endoporus, enter seam cutting drill bit (10) injection coal body is carried out to slot.
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| CN103397900B (en) * | 2013-07-15 | 2015-06-10 | 中国矿业大学 | Porous collaborative fracturing and extracting integrated gas extraction method |
| CN103510936A (en) * | 2013-10-08 | 2014-01-15 | 中国矿业大学 | Double-ejector type three-phase jet flow slotting system and method |
| CN103541710B (en) * | 2013-10-16 | 2016-01-20 | 中国矿业大学 | Underground coal mine gas-liquid two-phase alternately drives pressure break coal body strengthening gas pumping method mutually |
| CN106735592A (en) * | 2017-01-17 | 2017-05-31 | 宜兴市科兴合金材料有限公司 | A kind of surface cutting apparatus for Mo wafer processing |
| CN109877714B (en) * | 2019-03-31 | 2023-09-12 | 吉林大学 | Multi-field auxiliary ultramicro jet processing device |
| CN111877995A (en) * | 2020-07-20 | 2020-11-03 | 南京集优智库信息技术有限公司 | Water outlet type trenching device distributed at center of main shaft of cutter head |
| CN114607336B (en) * | 2022-03-08 | 2023-10-27 | 煤炭科学技术研究院有限公司 | Colliery underground high-pressure gas-liquid two-phase jet impact pressure relief and reflection increasing method |
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| US4826087A (en) * | 1985-02-12 | 1989-05-02 | David Chinery | Manipulative device |
| CN102080525A (en) * | 2010-12-20 | 2011-06-01 | 郑州大学 | High-pressure gas injection hole-drilling pressure-releasing outburst prevention method |
| CN201884049U (en) * | 2010-11-15 | 2011-06-29 | 湖南汉寿中煤科技有限公司 | Gas drainage and outburst prevention system for high-pressure water jet cutting and drilling interlocking coal seams with ultra-long drilled holes |
| CN203067016U (en) * | 2013-01-15 | 2013-07-17 | 中国矿业大学 | Gas-liquid two-phase jet flow slotting system |
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- 2013-01-15 CN CN201310013864.2A patent/CN103075180B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4826087A (en) * | 1985-02-12 | 1989-05-02 | David Chinery | Manipulative device |
| CN201884049U (en) * | 2010-11-15 | 2011-06-29 | 湖南汉寿中煤科技有限公司 | Gas drainage and outburst prevention system for high-pressure water jet cutting and drilling interlocking coal seams with ultra-long drilled holes |
| CN102080525A (en) * | 2010-12-20 | 2011-06-01 | 郑州大学 | High-pressure gas injection hole-drilling pressure-releasing outburst prevention method |
| CN203067016U (en) * | 2013-01-15 | 2013-07-17 | 中国矿业大学 | Gas-liquid two-phase jet flow slotting system |
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