CN107575164B - A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill - Google Patents
A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill Download PDFInfo
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- CN107575164B CN107575164B CN201711014002.6A CN201711014002A CN107575164B CN 107575164 B CN107575164 B CN 107575164B CN 201711014002 A CN201711014002 A CN 201711014002A CN 107575164 B CN107575164 B CN 107575164B
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Abstract
The present invention relates to a kind of high-pressure hydraulics under the conditions of brill radially to creep into guiding device and method, is related to coal bed gas extraction technical field.It specifically includes the following steps: firstly, mash gas pumping drilling of constructing in coal seam, the self-advancing type spray head for being connected with high-pressure rubber pipe is mounted in guiding device；Then, guiding device and self-advancing type spray head are integrally placed into drilling rod, start high-pressure hydraulic pump, the limit that self-advancing type spray head pushes guiding device to enter drilling rod bottom can be opened and closed in drill bit；Then, increase the discharge pressure of high-pressure hydraulic pump, so that self-advancing type spray head pushes guiding device to break through the baffle that limit can be opened and closed the center bit of drill bit and install into device, so that self-advancing type spray head exports from guide pipe and carries out radial drilling operation to coal seam；Finally, guiding device is carried out drilling operation repeatedly using drill control and adjustment.The configuration of the present invention is simple, it is widely applicable, and the extracting result in coal seam can be significantly improved.
Description
Technical field
The present invention relates to coal bed gas extraction technical fields, and in particular to a kind of high-pressure hydraulic radial direction brill under the conditions of brill
Into guiding device and method.
Background technique
Coal mine gas extraction is one of prevention and treatment most basic, most direct, most common means of coal mine gas disaster, however
The gas permeability in China coal seam is poor, and permeability is generally less than 1 × 10-3μm2, generally belong to hyposmosis coal seam reservoirs, gas is difficult to take out
It adopts.Especially with the increase of China's coal-mine mining depth, high methane and coal and gas outburst mine gradually increase, deep fractures
Under " three high " (i.e. High-geotemperature, high-ground stress, high reservoir pressure) geological environment, permeability is more reduced, and seriously affects
Gas pumping effect.Therefore, increase gas permeability of coal seam and have become coal mine gas extraction key technical problem urgently to be resolved.
Currently, high-pressure hydraulic technology and equipment have become the important channel for improving coal seam permeability.Such technology and dress
It is standby mainly to convert the water to high-pressure fluid using high-pressure pump, coal seam is pressed by drilling, presses off in coal seam and is closed crack simultaneously
Extension occurs, extends, is passed through so that connection occurs between each other, forms the perforation Fracture Networks being interweaved；Or pass through high pressure water
Jet stream cuts coal body, expands bore diameter, increases coal seam exposed area and the radial relief range that drills, reaches raising coal
The purpose of layer permeability.However, there are still certain limitations for current waterpower technology and equipment, such as hydraulic fracturing technology
Pressure break coverage is uncontrollable, unobvious to weak seam fracturing effect, and is generally only applicable to strata penetration hole, and concordant hole is possible to
Danger outstanding is induced, be easy to cause stress to concentrate after pressure break and subsequent exploitation is impacted；Hydraulic slotted liner technique, hydraulic flushing in hole,
Hydraulic flushing in hole etc. is affected by high pressure pump capacity and technique, and coverage is relatively small, generally 1.5-2.5m.
High-pressure hydraulic radial direction drilling technology is a kind of novel anti-reflection technology in coal seam.The technology is constructed extraction borehole in advance,
Guider is installed after moving back brill and is transferred to coal seam predetermined position, pressure duct and self-advancing type spray head are then passed through into Drill-pipe conveyed extremely
Guider, finally, self-advancing type spray head, using high pressure water as power, drilling forms radial slim hole in coal bed drilling, from
And reaching makes the antireflective effect in coal seam.The great advantage of the technology is controllable drainage from coal seam radius, and coverage is larger,
Realize the uniform anti-reflection of low-permeability coal seam.But the construction technology of the technology is relatively complicated at present, low efficiency, limits it
It promotes and applies.As Chinese patent literature CN103899349 B authorize " a kind of pre- pumping method of coal-bed gas and drainage holes are radial
Creep into guiding device ", it is constructed after extraction borehole first in coal seam, then driller's skill is moved back in implementation, then guiding device is installed band
In drilling and then carry out implementing radial drilling process；" underground coal mine waterpower spray disclosed in Chinese patent literature CN105089499 A
Penetrate tree-shaped drilling guide device and guidance method ", female hole of constructing first in coal (rock) layer is then log out drilling rod, then will guiding
Device is installed to the junction of drilling rod and drilling, and drilling tool is sent into drilling predetermined position again and carries out radial operation.In conclusion mesh
The preceding method in relation to radially creeping into requires to implement to move back driller's skill, significantly increases the radial drilling operation time, while also increasing
Worker's operation intensity is added.In view of this, need to improve drainage from coal seam drilling the guiding device that radially creeps into of high-pressure hydraulic and
Construction technology.
Summary of the invention
The purpose of the present invention is to provide a kind of high-pressure hydraulics under the conditions of brill radially to creep into guiding device and technique, real
After existing mash gas pumping drilling construction, radial bore operation is realized under the conditions of not moving back and boring, and is improved minor diameter radial bore and is applied
Work efficiency rate.
In order to achieve the above objectives, the invention provides the following technical scheme:
A kind of high-pressure hydraulic radial direction drilling guiding device under the conditions of brill, including limit can be opened and closed drill bit 8 and guiding fills
Set 6；
The limit can be opened and closed the outer drill bit 81 and center bit 82 that drill bit 8 includes hollow columnar, and the limit can be opened and closed
Drill bit 8 is used cooperatively with the guiding device 6, and the outer drill bit 81 is provided with limiting slot 87 far from the hollow space at cutter head end,
The limiting slot 87 is used to limit the axial movement of the guiding device 6；
The guiding device 6 includes bottom baffle 61, and one end of bottom baffle 61 is equipped with guide pipe 63, bottom baffle 61
Identical with the straight hole section diameter of both guide pipes 63, the bottom baffle 61 and 63 junction of guide pipe are provided with baffle 62, institute
Baffle 62 is stated for stopping the drilling forward of self-advancing type spray head 3, the axis and bottom baffle 61 of 63 radially outlet of guide pipe
Axis between have 0~90 ° of angle, for changing the drilling direction of the self-advancing type spray head.
Further, the bottom baffle 61 is connected through a screw thread with guide pipe 63, and the bottom baffle 61 is described in tapered
The geometry of limiting slot 87 matches with the bottom baffle 61.
Further, the geometric dimension of the mounting groove 83 is more than or equal to the corresponding geometric dimension of the center bit 82, institute
The height for stating overlap joint slot 84 must not interfere center bit 82 to rotate, and the center bit 82 overcomes anticreep under responsive to axial force
The restraining force of device is that shaft rotation is placed in the mounting groove 83 with pin shaft 85.
Further, the outer diameter bottom baffle 61 of the baffle 62 is identical with the diameter of 63 linkage section of guide pipe, baffle 62
The strength of materials guarantees to drive guiding device 6 to advance inside drilling rod under the flux driving effect of self-advancing type spray head 3 and is pierced by limit
Position can be opened and closed the center bit 82 of drill bit 8, while self-advancing type spray head 3 can smash baffle 62 after improving hydraulic pressure, thus make from into
Formula spray head 3 stretches out outside guide pipe 63.
Further, the radial section product of the limiting slot 87 is greater than the radial section product of the guide pipe.
A method of it is radially crept into, is included the following steps:
S1: mash gas pumping drilling of constructing in coal seam；
S2: the self-advancing type spray head for being connected with high-pressure rubber pipe is mounted in guiding device, the other end of high-pressure rubber pipe and company
Connect high-pressure hydraulic pump connection；
S3: guiding device and self-advancing type spray head are integrally placed into drilling rod；
S4: starting high-pressure hydraulic pump, the limit that self-advancing type spray head pushes guiding device to enter drilling rod bottom can be opened and closed in drill bit；
S5: increasing the discharge pressure of high-pressure hydraulic pump, so that self-advancing type spray head, which pushes guiding device to break through limit, can be opened and closed brill
The center bit of head, so that making guiding device be at least partially exposed to limit can be opened and closed outside drill bit；
S6: continuing growing the discharge pressure of high-pressure hydraulic pump, so that self-advancing type spray head smashes the baffle installed in guiding device,
It is exported from guide pipe to self-advancing type spray head, is exposed in drilling, radial drilling operation repeatedly carried out to coal seam, row is at putting
Penetrate the small bore of the radial branching of shape.
The beneficial effects of the present invention are: in the use of the present invention, the self-advancing type spray head of high-pressure rubber pipe will be connected with first
It is placed into guiding device, and then entirety is put into drilling rod again；Secondly, opening high-pressure hydraulic pump, starting self-advancing type spray head drive is led
To device by drilling rod enter drilling rod bottom can open and close type drill bit internal；Again, the output power of high-pressure hydraulic pump is increased, is increased
Self-advancing type spray head onward impulse is exposed to extraction so that the guide pipe of guiding device opens the obstruction of drill end center bit
In drilling, due to by guide bottom baffle with can open and close type drill bit internal limited block constraint, it is thus ensured that guiding
Device can only be at least partially exposed in drilling；Finally, further increasing the output power of high-pressure hydraulic pump, increases self-advancing type spray head and advance
Power and damage capability are stretched out so that it smashes baffle in guiding device from guiding device, and then carry out radial drilling to coal seam
Operation forms a series of " radial " radial branching slim hole, improves drainage from coal seam effect.
Detailed description of the invention
In order to keep the purpose of the present invention, technical scheme and beneficial effects clearer, the present invention provides following attached drawing and carries out
Illustrate:
Fig. 1 is principle schematic diagram of the present invention, and wherein a is present invention construction radial bore work in concordant mash gas pumping drilling
Skill schematic illustration；B is present invention construction radial bore technological principle schematic diagram in wearing layer mash gas pumping drilling；
Fig. 2 is construction flow chart of the present invention；
Fig. 3 is guiding device structural schematic diagram of the invention；
Fig. 4 is that limit can be opened and closed drill bit structure schematic diagram in the present invention, and wherein a is that limit can be opened and closed drill bit structure signal
Figure, b are the A-A sectional view of a；
Fig. 5 is guiding device and the hinged combination diagram of open and close type drill bit of the invention；
Fig. 6 is the radial slim hole schematic diagram of " radial ".
Specific embodiment
Below in conjunction with attached drawing, a preferred embodiment of the present invention will be described in detail.
As shown in figure 3, the present invention provides a kind of high-pressure hydraulic radial direction drilling guiding device under the conditions of brill, guiding dress
Set 6 azimuth when being mainly used for controlling the radial drilling operation of self-advancing type spray head 3.The bottom of guiding device 6 is tapered equipped with one
Bottom baffle 61 disposes guide pipe 63 on bottom baffle 61, and bottom baffle 61 is connected through a screw thread with guide pipe 63, the two straight hole
Section diameter is identical；There is 0~90 ° of angle between the axis of guide pipe 63 and the axis for being oriented to coupling tube, it can be according to specific work
The guide pipe that journey chooses different angle is installed；Baffle 62 is installed in bottom baffle 61 and 63 junction of guide pipe, baffle 62
Outer diameter is identical as the diameter of 63 linkage section of bottom baffle 61 and guide pipe, and the strength of materials of baffle 62 should ensure that sprays in self-advancing type
First 3 flux driving acts on lower drive guiding device 6 and advances inside drilling rod and open, is pierced by limit and can be opened and closed drill bit 8, simultaneously
Guarantee that self-advancing type spray head 3 can be smashed after improving hydraulic pressure, to stretch out outside guide pipe 63.
As shown in figure 4, Fig. 4 a is that limit can be opened and closed drill bit structure schematic diagram, Fig. 4 b is the A-A sectional view in Fig. 4 a.This hair
Bright also to provide a kind of limit and be opened and closed drill bit, limit can be opened and closed drill bit 8 and be mainly used for controlling being pierced by and limiting for guiding device 6.
It includes the outer drill bit 81 and center bit 82 in hollow columnar structures that limit, which can be opened and closed drill bit 8, is opened on the periphery wall of outer drill bit side
Equipped with the mounting groove 83 for accommodating center bit, outer drill bit 81 other side periphery wall opposite with the mounting groove 83 is equipped with and takes
Access slot 84；The fixing end of center bit 82 is hinged on the bottom of mounting groove 83 by pin shaft 85, and the free end of center bit 82 is logical
It crosses anti-drop device to be fixed on 84 in overlap joint slot, 83 geometric dimensions of mounting groove are more than or equal to the corresponding dimensioning of center bit 82
Very little, the height of overlap joint slot 84 must not interfere center bit 82 to rotate, and center bit 82 overcomes anticreep to fill under responsive to axial force
The restraining force set is shaft rotation with pin shaft 85 and can be placed in mounting groove 83 that 82 lower part of center bit is provided with limiting slot 87,
Cutter head 86 is equipped on outer drill bit 81 and center bit 82.
As shown in figure 5, guiding device of the invention and limit can be opened and closed the hinged combination diagram of drill bit.Limit can be opened and closed brill
The sectional area at the top of tapered hole that limiting slot 87 in first 8 is formed should be greater than the planimetric area of guide pipe 63；Limit can
The tapered hole that limiting slot 87 in opening and closing drill bit 8 is formed is matched with tapered bottom baffle 61, and guarantee guide pipe 63 opens
After heart drill bit 82, be smoothly pierced by can open and close type drill bit 8 be exposed to drilling 2 in；It can ensure that guiding device 6 cannot be all detached from simultaneously
Drill bit 8 and be fully exposed to drilling 2 in.It is real by increasing coefficient of friction or locating slot between limiting slot 87 and bottom baffle 61
Both existing synchronous rotation.
Fig. 1 a is present invention construction radial bore technological principle schematic diagram in concordant mash gas pumping drilling；Fig. 1 b is this hair
Bright radial bore technological principle schematic diagram of constructing in wearing layer mash gas pumping drilling；The present invention is in concordant and wears a layer gas drainage brill
Construction method in hole is similar, therefore the implementation case is clearly and completely retouched with the technical solution in Fig. 1 a case
It states.In conjunction with Fig. 2 construction flow chart of the present invention, as shown in Fig. 2, the present embodiment specifically includes the following steps:
Step S1, using underground coal mine essential safety drilling machine in coal seam 1 (initially passing through in 10 coal seam 1 of rock stratum) construct gas
Extraction borehole 2.
Step S2: after to extraction borehole construction, the self-advancing type spray head 3 for being connected with high-pressure rubber pipe 4 is arranged to guiding
In device 6, high-pressure rubber pipe 4 is for connecting high-pressure hydraulic pump 5 and self-advancing type spray head 3.
Step S3: self-advancing type spray head 3 and 6 entirety of guiding device are put into drilling rod 7.
Step S4: starting high-pressure hydraulic pump 5, self-advancing type spray head 3 pushes guiding device 6 to advance in drilling rod 7, until reaching brill
The limit of 7 bottom of bar can be opened and closed in drill bit 8.
Step S5: increasing discharge pressure, and 3 motive force of self-advancing type spray head further enhances, so that guiding device 6 breaks through limit
It can be opened and closed the center bit 83 of drill bit 8, guide pipe 64, which is at least partially exposed to limit, can be opened and closed outside drill bit 8, while also be exposed to gas
In extraction borehole 2.
Step S6: further increasing discharge pressure intensity, and self-advancing type spray head 3 smashes the baffle 63 installed in guiding device 6,
It exports, is exposed in drilling 2 from guide pipe 64；Radial drilling operation is carried out to coal seam 1, a radial branching minor diameter is formed and bores
Hole 9.By the operation repeatedly of different location different angle, " radial " radial branching minor diameter shown in fig. 6 is ultimately formed
Drilling.
It should be noted that preferred embodiment above is only to illustrate the technical solution of invention rather than limits, although passing through
Above preferred embodiment is described in detail the present invention, however, those skilled in the art should understand that, can be in shape
Various changes are made in formula and to it in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of high-pressure hydraulic under the conditions of brill radially creeps into guiding device, it is characterised in that: drill bit can be opened and closed including limit
(8) and guiding device (6)；
The limit can be opened and closed the outer drill bit (81) and center bit (82) that drill bit (8) includes hollow columnar, the outer drill bit
(81) mounting groove (83) for accommodating center bit, the outer drill bit (81) and the mounting groove are offered on the periphery wall of side
(83) opposite other side periphery wall is equipped with overlap joint slot (84)；The fixing end of the center bit (82) is cut with scissors by pin shaft (85)
The bottom in mounting groove (83) is connect, the free end of the center bit (82) is fixed in overlap joint slot (84) by anti-drop device,
Center bit (82) lower part is provided with limiting slot (87), is equipped with cutter head on the outer drill bit (81) and center bit (82)
(86)；The limit can be opened and closed drill bit (8) and be used cooperatively with the guiding device (6), and the outer drill bit (81) is far from cutter head end
Hollow space be provided with limiting slot (87), the limiting slot (87) is used to limit the axial movements of the guiding device (6)；
The guiding device (6) includes bottom baffle (61), and one end of bottom baffle (61) is equipped with guide pipe (63), bottom gear
Plate (61) is identical with the straight hole section diameter of both guide pipes (63), the bottom baffle (61) and the setting of guide pipe (63) junction
Have baffle (62), the baffle (62) is used to stop the drilling forward of self-advancing type spray head (3), guide pipe (63) radially outlet
Axis and bottom baffle (61) axis between have 0~90 ° of angle, for changing the drilling side of the self-advancing type spray head
To.
2. a kind of high-pressure hydraulic under the conditions of brill according to claim 1 radially creeps into guiding device, it is characterised in that:
The bottom baffle (61) is connected through a screw thread with guide pipe (63), and the bottom baffle (61) is in tapered, the limiting slot
(87) geometry matches with the bottom baffle (61).
3. a kind of high-pressure hydraulic under the conditions of brill according to claim 1 radially creeps into guiding device, it is characterised in that:
The geometric dimension of the mounting groove (83) is more than or equal to the center bit (82) corresponding geometric dimension, the overlap joint slot (84)
Height center bit (82) must not be interfered to rotate, and the center bit (82) overcomes anti-drop device under responsive to axial force
Restraining force is that shaft rotation is placed in the mounting groove (83) with pin shaft (85).
4. a kind of high-pressure hydraulic under the conditions of brill according to claim 1 radially creeps into guiding device, it is characterised in that:
The outer diameter bottom baffle (61) of the baffle (62) is identical with the diameter of guide pipe (63) linkage section, the strength of materials of baffle (62)
Guarantee that advance inside drilling rod and be pierced by limit can for drive guiding device (6) under the flux driving effect of self-advancing type spray head (3)
It is opened and closed the center bit (82) of drill bit (8), while self-advancing type spray head (3) can smash baffle (62) after improving hydraulic pressure, to make
Self-advancing type spray head (3) stretches out guide pipe (63) outside.
5. a kind of high-pressure hydraulic under the conditions of brill according to claim 1 radially creeps into guiding device, it is characterised in that:
The radial section product of the limiting slot (87) is greater than the radial section product of the guide pipe.
6. a kind of method that the guiding device using any one of claim 1-5 is radially crept into, it is characterised in that: including such as
Lower step:
S1: mash gas pumping drilling of constructing in coal seam；
S2: the self-advancing type spray head for being connected with high-pressure rubber pipe is mounted in guiding device, the other end of high-pressure rubber pipe with connect height
Water pump connection；
S3: guiding device and self-advancing type spray head are integrally placed into drilling rod；
S4: starting high-pressure hydraulic pump, the limit that self-advancing type spray head pushes guiding device to enter drilling rod bottom can be opened and closed in drill bit；
S5: increasing the discharge pressure of high-pressure hydraulic pump, so that self-advancing type spray head, which pushes guiding device to break through limit, can be opened and closed drill bit
Center bit, so that making guiding device be at least partially exposed to limit can be opened and closed outside drill bit；
S6: continuing growing the discharge pressure of high-pressure hydraulic pump, so that self-advancing type spray head smashes the baffle installed in guiding device, thus
Self-advancing type spray head is exported from guide pipe, is exposed in drilling, carries out radial drilling operation repeatedly to coal seam, row is at radial
Radial branching small bore.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711014002.6A CN107575164B (en) | 2017-10-25 | 2017-10-25 | A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711014002.6A CN107575164B (en) | 2017-10-25 | 2017-10-25 | A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill |
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| Publication Number | Publication Date |
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| CN107575164A CN107575164A (en) | 2018-01-12 |
| CN107575164B true CN107575164B (en) | 2019-03-19 |
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| CN201711014002.6A Active CN107575164B (en) | 2017-10-25 | 2017-10-25 | A kind of high-pressure hydraulic radial direction drilling guiding device and method under the conditions of brill |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677450B (en) * | 2020-05-22 | 2022-03-15 | 中煤科工集团西安研究院有限公司 | Device and method for drilling branch hole of underground directional drilling of coal mine |
| CN111594142B (en) * | 2020-05-24 | 2023-03-28 | 中煤科工集团重庆研究院有限公司 | System and method for measuring drilling track while drilling under coal mine |
| CN116771277B (en) * | 2023-06-08 | 2024-02-23 | 华能云南滇东能源有限责任公司 | Gas extraction directional drilling system and equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203584307U (en) * | 2013-05-20 | 2014-05-07 | 河南理工大学 | Novel underground coal mine overall length drilling gas extraction device |
| CN103899349B (en) * | 2014-04-23 | 2015-12-09 | 重庆市能源投资集团科技有限责任公司 | A kind of pre-pumping method of coal-bed gas and drainage holes radial direction creep into guiding device |
| CN103924925B (en) * | 2014-05-07 | 2016-03-23 | 重庆大学 | A kind of jetting self-propelled drilling increases gas permeability of coal seam method and device |
| CN204609784U (en) * | 2015-04-21 | 2015-09-02 | 李定启 | A kind of soft seam setting of casing locking-type combined drill |
| CN105156085B (en) * | 2015-09-11 | 2018-02-02 | 重庆大学 | The coal mine underground coal bed tree-shaped uniform anti-reflection method of drilling composite fracturing |
| CN205503011U (en) * | 2016-01-11 | 2016-08-24 | 河南理工大学 | Coalbed gas takes out and adopts dowelling jig and protect and take out integrated device |
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