CN103899349B - A kind of pre-pumping method of coal-bed gas and drainage holes radial direction creep into guiding device - Google Patents
A kind of pre-pumping method of coal-bed gas and drainage holes radial direction creep into guiding device Download PDFInfo
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- CN103899349B CN103899349B CN201410165740.0A CN201410165740A CN103899349B CN 103899349 B CN103899349 B CN 103899349B CN 201410165740 A CN201410165740 A CN 201410165740A CN 103899349 B CN103899349 B CN 103899349B
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Abstract
The invention discloses the pre-pumping method of a kind of coal-bed gas and drainage holes radial direction creeps into guiding device, the method comprises creeps into drainage holes from crossdrift tunnel along bearing; The radial direction installing fluid power boring in drainage holes creeps into guiding device; Adjustment radial direction creeps into guiding device; Hydraulic jet shower nozzle and flexible medium pipeline are inserted guiding device, and makes the fluid jet nozzle axially axial deflection in 60 ~ 90 ° of angles with drainage holes by guiding device; Jetting creeps into branched hole to set depth backed off after random shower nozzle; Repeat adjustment and creep into branched hole etc., until branched hole has all sprayed; Carry out pressure break sealing of hole; Fracturing and gas pumping are carried out until up to standard to coal seam.This device is used for drilling direction and the position control of branched hole.The invention has the beneficial effects as follows, pumping method effectively can reduce tunnelling preparation amount, shortens time, improves coal mining efficiency; Apparatus structure is simple, easy to operate, can conveniently in drainage holes radial direction creep into multiple branched hole.
Description
Technical field
The present invention relates to a kind of coal-bed gas gas pumping method, the pre-pumping method of especially a kind of coal-bed gas and drainage holes radial direction creep into guiding device.
Background technology
Coal-bed gas is a kind of clear energy sources, but for coal production a kind of disaster source especially.The coal hosting geological condition of China is complicated, and mainly rely on underground mining, along with the increase of mining depth, coal seam gas-bearing capacity increases gradually, and coal-bed gas pressure increases, and outstanding danger increases, and protrusion-dispelling difficulty is increasing.Coal mining gas pre-drainage is to needing the region of digging laneway to carry out the pre-extraction of strip-type before coal roadway tunneling.Existing extraction way is in seat earth or top board, tunnel a Di Chou Xiang Huodingchou lane, holes in Di Chou Xiang Huodingchou lane to strip coal layer region.Because this extraction way needs to tunnel Di Chou Xiang Huodingchou lane, its workload is large, and tunnelling time is long, and drivage efficiency is low.For this reason, need to take out mode in advance to existing coal-bed gas and device improves.
Summary of the invention
The first object of the present invention is the deficiency for existing drainage from coal seam technology, there is provided a kind of coal-bed gas pre-pumping method, extraction lane is substituted by creeping into drainage holes in seat earth or top board, to cancel Di Chou Xiang Huodingchou lane, reduce the engineering quantity of coal cutting roadway driving preparation, shorten time of mining, improve coal mining efficiency.
For realizing the first object, the present invention adopts following technical scheme:
The pre-pumping method of a kind of coal-bed gas, comprises the following steps:
A, in seat earth or top board, creep into drainage holes from crossdrift tunnel along bearing, this drainage holes extends along bearing;
B, in drainage holes, install the fluid power hole diameter that is made up of fixed disk and activity-oriented parts to creeping into guiding device, and fixed disk is fixedly connected with the aperture place crag of drainage holes;
C, by intending boring the direction initialization that creeps into of branched hole and the radial activity-oriented parts creeping into guiding device of position adjustment;
D, by the fluid jet nozzle of jetting rig, and the flexible medium pipeline be connected with fluid jet nozzle is inserted in activity-oriented parts, and by activity-oriented member forward end make fluid jet nozzle axially with the deflection of drainage holes axially in 60 ~ 90 ° of angles;
E, utilize jetting rig to creep into branched hole to set depth after, exit flexible medium pipeline and fluid jet nozzle;
F, repetition step c ~ e, until the branched hole in setting regions has all sprayed;
Guiding device and jetting rig are crept in g, dismounting, pressure break screen casing is inserted drainage holes, and carries out sealing of hole to drainage holes by pressure break requirement;
H, pressure break screen casing to be connected with fracturing pump group, to utilize fracturing pump group to carry out the anti-reflection process of fracturing to pre-stripping band control area, coal seam;
The connecting tube of i, dismounting pressure break screen casing and fracturing pump group, is connected pressure break screen casing with coal mine gas extraction system, carries out coal bed gas extraction, until the gas bearing capacity in pre-stripping band control area, coal seam meets tunnel safety driving standard.
Adopt the present invention of technique scheme, the drainage holes extended along bearing is crept in crossdrift position between underworkings in the rock stratum of seat earth or top board, hydrojet boring shower nozzle and flexible medium pipeline is installed by arranging radial direction creep into guiding device and creep in guiding device in radial direction in this drainage holes, realization take drainage holes as multiple branched holes in trunk hole, and by carrying out the pre-extraction of band coal bed gas after hydraulic fracturing anti-reflection, thus realize band gas pre-drainage in the mode that drainage holes substitutes Di Chou Xiang Huodingchou lane and adopt, no longer need to tunnel Di Chou Xiang Huodingchou lane, effectively can reduce band gas pre-drainage to adopt and the preparation of coal roadway tunneling, shorten time of mining, improve coal mining efficiency.
The second object of the present invention is to provide the pre-drainage holes radial direction of a kind of coal-bed gas and creeps into guiding device, realize turning round of hydrojet boring by this device to turn to, realize strip coal layer gas pre-drainage adopt to form multiple branched hole on extraction trunk hole, reach the object substituting Di Chou Xiang Huodingchou lane with trunk hole.
For realizing the second object, the present invention adopts following scheme.
The pre-drainage holes radial direction of a kind of coal-bed gas creeps into guiding device, and comprise fixed disk and activity-oriented parts, fixed disk is provided with the installing hole be fixedly connected with for crag, and the outer card of fixed disk is formed with angle index; Described activity-oriented parts comprise transition disc, transition disc is coaxially connected in the outer card of described fixed disk by screw, the curved gain shape of the screw connecting hole that transition disc is provided with, transition disc outer cylinder surface is provided with groove groove, the bore area of transition disc is formed with gear tongue; Transition disc is sliding combined with guide pipe by endoporus, the outer cylinder surface of guide pipe is formed with the gathering sill coordinated with gear tongue room; Guide pipe is by bend pipe and straight tube and form, and the exit axis of this bend pipe and straight tube axis are the deflection of 60 ~ 90 ° of angles.
Adopt the present invention of technique scheme, during use, activity-oriented parts are arranged in the extraction trunk hole of seat earth or top board formation, and be fixed on the aperture crag in trunk hole by fixed disk, the radial direction that activity-oriented parts are used for branched hole creeps into guiding, with the branched hole that formation and trunk hole are 60 ~ 90 ° of angles, by the distance between mobile straight tube adjustment bend pipe to fixed disk, to form the multiple branched holes along the distribution of trunk axially bored line, simultaneously, by rotating transition disc, bend pipe is turned an angle, multiple branched hole is formed with the same depth location in trunk hole, the object that hole is taken out on hole or top is taken out to realize substituting the end by trunk drainage holes.
Preferably, described transition disc is fixedly connected with handle.Be convenient to implement indexing operation to transition disc.
Preferably, described straight tube is made up of multiple straight length, the straight length adjacent with described bend pipe is welded on bend pipe, adjacent two straight lengths form the syndeton of convex-concave complementation by the end-tooth of 3 ~ 6 circumference uniform distributions and the end face groove that coordinates with this end-tooth, at the end-tooth of adjacent two straight lengths with in the section of cooperation of end face groove, be provided with the axle elastic collar axially connected for the two by collar groove; Described gathering sill is located on straight length.The distance between the quantity adjustment bend pipe of straight length and fixed disk can be increased and decreased easily, thus realize the setting of branched hole axial different distance in trunk hole.End-tooth is set to more than three and can effectively prevents adjacent straight pipeline section from mutual transposition occurring, to make the guiding of bend pipe be effectively controlled, concrete quantity is comprehensively determined according to straight length diameter and length, with 6 for the upper limit.
Further preferred, the pipeline section that described straight length is positioned at transition disc is clamped with and embraces pincers.Structure is simple, easy to operate, can effectively prevent guiding parts to slippage in hole.
The present invention's beneficial effect is compared with prior art, pumping method effectively can reduce tunnelling preparation amount, shortens time, improves coal mining efficiency; Apparatus structure is simple, easy to operate, can conveniently in drainage holes radial direction creep into multiple branched hole.
Accompanying drawing explanation
Fig. 1 is the position relationship schematic diagram of the application drainage holes 1 that creeps into of the inventive method and branched hole 11.
Fig. 2 is the application drainage holes 1 that creeps into of the inventive method and the axial cut-away illustration of branched hole 11.
Fig. 3 is that application the inventive method carries out the structural representation after sealing of hole to the drainage holes 1 crept into.
Fig. 4 is the structural representation of guiding device of the present invention.
Fig. 5 is the top view of Fig. 4 of the present invention.
Fig. 6 is straight length 92 structural representation in guiding device of the present invention.
Fig. 7 is the upward view of Fig. 6 of the present invention.
Fig. 8 is the top view of Fig. 6 of the present invention.
Fig. 9 is the syndeton schematic diagram of bend pipe 91 and adjacent straight pipeline section 92 in guiding device of the present invention.
Figure 10 is the structural representation embracing pincers 12 in guiding device of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further illustrated, but therefore do not limit the present invention among described practical range.
Embodiment 1 is see Fig. 1, Fig. 2, Fig. 3, and the pre-pumping method of a kind of coal-bed gas, comprises the following steps:
A, in seat earth or top board, creep into drainage holes 1 from crossdrift tunnel along bearing, this drainage holes 1 extends along bearing;
B, in drainage holes 1, install the fluid power hole diameter that is made up of fixed disk 2 and activity-oriented parts 3 to creeping into guiding device, and be fixedly connected with the aperture place crag of drainage holes 1 by fixed disk 2;
C, by intending boring the direction initialization that creeps into of branched hole 11 and the radial activity-oriented parts 3 creeping into guiding device of position adjustment;
D, by the fluid jet nozzle 4 of jetting rig, and the flexible medium pipeline 5 to be connected with fluid jet nozzle 4 is inserted in activity-oriented parts 3, and by activity-oriented parts 3 front end make fluid jet nozzle 4 axially with the deflection of drainage holes 1 axially in 60 ~ 90 ° of angles;
E, utilize jetting rig to creep into branched hole 11 to set depth after, exit flexible medium pipeline 5 and fluid jet nozzle 4;
F, repetition step c ~ e, until the branched hole 11 in setting regions has all sprayed;
Guiding device and jetting rig are crept in g, dismounting, pressure break screen casing 6 is inserted drainage holes 1, and carries out sealing of hole to drainage holes 1 by pressure break requirement;
H, pressure break screen casing 6 to be connected with fracturing pump group, to utilize fracturing pump group to carry out the anti-reflection process of fracturing to pre-stripping band control area, coal seam;
The connecting tube of i, dismounting pressure break screen casing and fracturing pump group, is connected pressure break screen casing with coal mine gas extraction system, carries out coal bed gas extraction, until the gas bearing capacity in pre-stripping band control area, coal seam meets tunnel safety driving standard.
Embodiment 2 is see Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Figure 10, the pre-drainage holes radial direction of a kind of coal-bed gas creeps into guiding device, comprise fixed disk 2 and activity-oriented parts, fixed disk 2 is provided with the installing hole 21 be fixedly connected with for crag, the outer card of fixed disk 2 is formed with angle index 22, transition disc 7 is fixedly connected with handle 10; Described activity-oriented parts comprise transition disc 7, transition disc 7 is coaxially connected in the outer card of described fixed disk 2 by screw 8, the curved gain shape of the screw connecting hole that transition disc 7 is provided with, transition disc 7 outer cylinder surface is provided with groove groove 71, the bore area of transition disc 7 is formed with gear tongue 72; Transition disc 7 is sliding combined with guide pipe by endoporus, the outer cylinder surface of guide pipe is formed with the gathering sill with gear tongue 72 matched in clearance; Guide pipe is by bend pipe 91 and straight tube and form, and the exit axis of this bend pipe 91 and straight tube axis are the deflection of 60 ~ 90 ° of angles.Described straight tube is made up of multiple straight length 92, the straight length 92 adjacent with described bend pipe 91 is welded on bend pipe 91, the end-tooth 92a that adjacent two straight lengths 92 pass through four circumference uniform distributions and the end face groove 92b coordinated with this end-tooth 92a forms the syndeton of convex-concave complementation, at the end-tooth 92a of adjacent two straight lengths 92 with in the section of cooperation of end face groove 92b, be provided with the axle elastic collar 93 axially connected for the two by collar groove 92c; Described gathering sill is located on straight length 92.The pipeline section that described straight length 92 is positioned at transition disc 7 is clamped with and embraces pincers 12.This armful of pincers 12 comprise the hinged two semicircular in one end and embrace folder 12a, and the free end that semicircle embraces folder 12a is connected with two parallel handles, and two handles are fixedly connected with nut by bolt 12b.
In the present embodiment, end-tooth 92a also can be three, five or six.
Carry out in drilling operation process at the branched hole utilizing this device to carry out extraction, when branched hole axis and radial position are crept in needs adjustment, first by the flexible medium pipeline of waterpower rig and fluid jet nozzle 4 exit from the straight-tube portion of guiding device, then by transition disc 7 rotational angle or by increase and decrease straight length 92 convert axial location.
Although combine above and drawings describe embodiments of the present invention, but those of ordinary skill in the art also can recognize in the scope to claims and makes various change or amendment, these modifications and variations are interpreted as within scope of the present invention and intention.
Claims (6)
1. the pre-pumping method of coal-bed gas, is characterized in that, comprise the following steps:
A, in seat earth or top board, creep into drainage holes (1) from crossdrift tunnel along bearing, this drainage holes (1) extends along bearing;
B, in drainage holes (1), install the fluid power hole diameter that is made up of fixed disk (2) and activity-oriented parts (3) to creeping into guiding device, and be fixedly connected with the aperture place crag of drainage holes (1) by fixed disk (2);
C, by intending boring branched hole (11) direction initialization that creeps into and the radial activity-oriented parts (3) creeping into guiding device of position adjustment;
D, by the fluid jet nozzle (4) of jetting rig, and the flexible medium pipeline (5) to be connected with fluid jet nozzle (4) is inserted in activity-oriented parts (3), and by activity-oriented parts (3) front end make fluid jet nozzle (4) axially with the deflection of drainage holes (1) axially in 60 ~ 90 ° of angles;
E, utilize jetting rig to creep into branched hole (11) to set depth after, exit flexible medium pipeline (5) and fluid jet nozzle (4);
F, repetition step c ~ e, until the branched hole (11) in setting regions has all sprayed;
Guiding device and jetting rig are crept in g, dismounting, pressure break screen casing (6) is inserted drainage holes (1), and carries out sealing of hole to drainage holes (1) by pressure break requirement;
H, pressure break screen casing (6) to be connected with fracturing pump group, to utilize fracturing pump group to carry out the anti-reflection process of fracturing to pre-stripping band control area, coal seam;
The connecting tube of i, dismounting pressure break screen casing and fracturing pump group, is connected pressure break screen casing with coal mine gas extraction system, carries out coal bed gas extraction, until the gas bearing capacity in pre-stripping band control area, coal seam meets tunnel safety driving standard.
2. the pre-drainage holes radial direction of coal-bed gas creeps into guiding device, it is characterized in that, comprise fixed disk (2) and activity-oriented parts, fixed disk (2) is provided with the installing hole (21) be fixedly connected with for crag, the outer card of fixed disk (2) is formed with angle index (22); Described activity-oriented parts comprise transition disc (7), transition disc (7) is coaxially connected in the outer card of described fixed disk (2) by screw (8), the curved gain shape of the screw connecting hole that transition disc (7) is provided with, transition disc (7) outer cylinder surface is provided with groove groove (71), the bore area of transition disc (7) is formed with gear tongue (72); Transition disc (7) is sliding combined with guide pipe by endoporus, the outer cylinder surface of guide pipe is formed with the gathering sill with gear tongue (72) matched in clearance; Guide pipe is made up of bend pipe (91) and straight tube, and the exit axis of this bend pipe (91) and straight tube axis are the deflection of 60 ~ 90 ° of angles.
3. the pre-drainage holes radial direction of coal-bed gas according to claim 2 creeps into guiding device, it is characterized in that, described transition disc (7) is fixedly connected with handle (10).
4. the pre-drainage holes radial direction of the coal-bed gas according to Claims 2 or 3 creeps into guiding device, it is characterized in that, described straight tube is made up of multiple straight length (92), the straight length (92) adjacent with described bend pipe (91) is welded on bend pipe (91), adjacent two straight lengths (92) form the syndeton of convex-concave complementation by the end-tooth (92a) of 3 ~ 6 circumference uniform distributions and the end face groove (92b) that coordinates with this end-tooth (92a), at the end-tooth (92a) of adjacent two straight lengths (92) with in the section of cooperation of end face groove (92b), the axle elastic collar (93) axially connected for the two is provided with by collar groove (92c), described gathering sill is located on straight length (92).
5. the pre-drainage holes radial direction of coal-bed gas according to claim 4 creeps into guiding device, it is characterized in that, the pipeline section that described straight length (92) is positioned at transition disc (7) is clamped with and embraces pincers (12).
6. the pre-drainage holes radial direction of coal-bed gas according to claim 5 creeps into guiding device, it is characterized in that, described armful of pincers (12) comprises the hinged two semicircular in one end and embraces folder (12a), the free end that semicircle embraces folder (12a) is connected with two parallel handles, and two handles are fixedly connected with nut by bolt (12b).
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| CN201410165740.0A CN103899349B (en) | 2014-04-23 | 2014-04-23 | A kind of pre-pumping method of coal-bed gas and drainage holes radial direction creep into guiding device |
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| CN201410165740.0A CN103899349B (en) | 2014-04-23 | 2014-04-23 | A kind of pre-pumping method of coal-bed gas and drainage holes radial direction creep into guiding device |
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| CN104389559B (en) * | 2014-09-30 | 2017-04-26 | 河南理工大学 | Method and device for preventing and controlling gas transfinite in thick-coal-seam mining process |
| CN104696003B (en) * | 2015-01-06 | 2017-04-05 | 中国矿业大学 | A kind of cutting integrated drillingization and vibration heat injection cooperative reinforcing coal bed gas extraction method |
| CN104747230B (en) * | 2015-03-02 | 2016-10-19 | 陈宝宝 | A kind of coal mine methane drawing device and using method thereof |
| CN106761652A (en) * | 2016-12-26 | 2017-05-31 | 大庆井泰石油工程技术股份有限公司 | Orientation windowing horizontal drilling, coring and matching method |
| CN106907175B (en) * | 2017-05-02 | 2019-06-04 | 中国矿业大学 | The efficient extraction coal roadway stripe gas of bottom plate concordant long drilled holes staged fracturing and region outburst elimination method |
| CN107575164B (en) * | 2017-10-25 | 2019-03-19 | 中煤科工集团重庆研究院有限公司 | A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill |
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| CN112682090B (en) * | 2020-12-30 | 2022-06-03 | 山东科技大学 | Coal seam drilling interconnection method and system based on impact process and gas extraction method |
| CN113417636B (en) * | 2021-05-31 | 2022-07-15 | 中煤科工集团重庆研究院有限公司 | Comb-shaped through-layer directional long-drilling-hole branch-hole coal seam section accurate hydraulic fracturing process |
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| CN101936153A (en) * | 2010-09-14 | 2011-01-05 | 中矿瑞杰(北京)科技有限公司 | Method for exploiting coal bed gas by water power spray drilling for releasing pressure |
| CN102747999A (en) * | 2011-04-18 | 2012-10-24 | 中联煤层气有限责任公司 | Method for developing coal bed gas by deeply penetrating radial horizontal well by hydraulic power |
| CN202325239U (en) * | 2011-11-10 | 2012-07-11 | 中国石油天然气股份有限公司 | Hydraulic jetting radial drilling device |
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| CN103615226A (en) * | 2013-11-08 | 2014-03-05 | 中国石油天然气股份有限公司 | Drilling and fracturing method by hydraulic jetting |
| CN203822360U (en) * | 2014-04-23 | 2014-09-10 | 重庆市能源投资集团科技有限责任公司 | Radialdrilling guide device for coal seam gas preliminary extraction hole |
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