CN103939074A - Drilling rod for directionally expanding coal bed cracking scale and using method thereof - Google Patents
Drilling rod for directionally expanding coal bed cracking scale and using method thereof Download PDFInfo
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- CN103939074A CN103939074A CN201410120394.4A CN201410120394A CN103939074A CN 103939074 A CN103939074 A CN 103939074A CN 201410120394 A CN201410120394 A CN 201410120394A CN 103939074 A CN103939074 A CN 103939074A
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- drilling rod
- water filling
- seam
- coal seam
- handle
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Abstract
The invention discloses a drilling rod for directionally expanding the coal bed cracking scale and a using method thereof. The drilling rod comprises a hollow outer sleeve tube, a handle is arranged on the outer side of the bottom of the outer sleeve tube, and a first water injecting seam is formed in the bottom circumference of the outer sleeve tube. A water outlet hole is formed in the top of the outer sleeve tube, an inner sleeve tube is arranged in the outer sleeve tube, and a flow splitter is arranged on the top of the inner sleeve tube. A second water injecting seam is formed in the bottom circumference of the inner sleeve tube, and a valve is arranged between the first water injecting seam and the second water injecting seam. Through the drilling rod and the using method thereof, cracks generated by cracked coal beds extend in a preset direction on a large scale, the gas permeability of the coal beds is improved, the strength of the coal beds is lowered, and the production efficiency is improved.
Description
Technical field
The present invention relates to the method for colliery industry exploitation, particularly a kind of directed drilling rod and using method thereof that expands coal seam crackle scale.
Background technology
Colliery industry is the support industry of economic development, and how the exploitation colliery of efficient, safety, environmental protection is constantly the technical problem of research.Consider coal seam rock mass rigid strong, density is high, in recovery process, utilize hydrofracturing technology can reduce coal seam rock mass intensity, strengthen gas permeability of coal seam.In prior art, by single borehole device, water filling is carried out in coal seam its fracturing is weakened, the small scale that cracks in coal seam, direction is uncontrollable, cannot make crackle expand by predetermined direction.At present, it is uncontrollable that a difficult problem for this technology maximum is exactly the crack advance that produces of coal seam after fracturing, weak effect.
Summary of the invention
For there being technical problem in prior art, the invention provides a kind of directed drilling rod and using method thereof that expands coal seam crackle scale, crack on a large scale and expand by predetermined direction by the coal seam after this drilling rod and using method fracturing thereof, improve gas permeability of coal seam, reduce coal strength, enhance productivity.
Exist technical problem, the present invention to adopt following technical scheme in order to solve in prior art:
A kind of directed drilling rod that expands coal seam crackle scale, comprise the outer tube of hollow, described outer sleeve bottom arranged outside jug, on described outer sleeve bottom circumference, be provided with the first water filling seam, described outer tube top is provided with weep hole, and described outer tube inside is provided with inner sleeve, and the top of described inner sleeve is provided with current divider, on the circumference of described inner sleeve bottom, be provided with the second water filling seam, between described the first water filling seam and described the second water filling seam, be provided with valve.
Angular range between described handle and described outer sleeve bottom transverse axis is 0～90 °.
Described the first water filling is sewn on position and described the second water filling on described outer tube circumference and is sewn on position consistency on described inner sleeve circumference.
The present invention can also adopt a kind of method that uses the directed drilling rod that expands coal seam crackle scale, and its step is as follows:
The first, in the position for the treatment of working seam work selection prebored hole, and described drilling rod is connected with rig, drill bit respectively;
The second, use hole packer to drilling rod bottom shutoff, and connect high-pressure water pipe;
The 3rd, the handle angle scope of adjusting in described drilling rod makes it to reach pre-provisioning request;
The 4th, rotate described drilling rod and make the angle of its first water filling seam consistent with the predetermined angular of handle in described step 2;
The 5th, open the valve in described drilling rod, make the first water filling seam stitch and overlap with the second water filling, by high-pressure water pipe to water filling in described drilling rod;
The 6th, in described drilling rod, current divider is laterally shunted the water under high pressure in step 4 to be injected into inside, coal seam from weep hole, the inner directed water filling of the linear plane crack that forms, coal seam;
The 7th, when water filling crack in step 5 reaches after requirement, close the valve in described drilling rod, no longer by described drilling rod water filling; Meanwhile, from the described drilling rod of interior extraction of holing;
The 8th, use hole packer to the shutoff again of holing in step 6, from the high-pressure water pipe 7 that leaves to boring in water filling, make cracks in coal seam extend expansion according to set direction, until whole coal seam crack depth reaches exploitation requirement.
In described step 3, handle is adjusted angular range at 0～90 °.
Beneficial effect of the present invention: the first, the present invention enters the angular range of outer tube by adjusting the angle control high pressure water injection of directed handle unlatching, and then controls high pressure water injection flow, flow velocity.The second, the present invention by changeover valve control the first water filling seam, the second water filling seam overlap, every closing, meet and generate fast needs.The 3rd, the present invention is effectively split into lateral current and sprays into coal seam injecting the water under high pressure of inner sleeve by current divider, can make to form linear orientation water filling crack in the coal seam in, and the crackle area that produces is large, the degree of depth is strong, enhance productivity, and saving manpower.The 4th, the present invention is rational in infrastructure, it is ingenious, easy to operate to design, and is suitable for extensive use.
Attached body explanation
Fig. 1 is a kind of directed jackrod structure schematic diagram that expands coal seam crackle scale of the present invention.
Fig. 2 is a kind of directed drilling rod A-A sectional drawing that expands coal seam crackle scale of the present invention.
Fig. 3 uses a kind of directed drilling rod schematic diagram that expands coal seam crackle scale of the present invention.
Reference numeral:
1--outer tube 11--handle 12--first water filling seam 13--weep hole 14--iron hoop 2--inner sleeve 21--second water filling seam 3--current divider 4--valve 5-hole packer 6-drill bit 7-high-pressure water pipe
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in detail:
As Fig. 1, shown in Fig. 2, the invention provides a kind of directed drilling rod that expands coal seam crackle scale, comprise the outer tube 1 of hollow, described outer tube 1 bottom outside is provided with handle 11, and the angular range between described handle 11 and described outer tube 1 bottom transverse axis is 0～90 °.Described handle 11 is inserted in outer sleeve bottom by iron hoop 14, and handle 11 is welded on the circumference of iron hoop 14, and generally handle 11 is 1 or 2.In actual production, according to the hardness in coal seam, adjust the angle of handle 11 and control to the angular range of outer tube 1 high pressure water injection, and then ensure water filling flow velocity, flow.On described outer tube 1 bottom circumference, be provided with the first water filling seam 12, described outer tube top is provided with weep hole 13, described outer tube inside is provided with inner sleeve 2, the top of described inner sleeve is provided with current divider 3, on described inner sleeve 2 bottom circumference, be provided with the second water filling seam 21, between described the first water filling seam 12 and described the second water filling seam 21, be provided with valve 4, described the first water filling seam 12 is position and described the second water filling seam 21 position consistency on inner sleeve 2 circumference on outer tube 1 circumference.Like this, in the time of needs water filling, Open valve 4, the first water filling seams 12 overlap with the second water filling seam 21, complete water filling.Valve-off 4, the first water filling seams 12 and the second water filling seam 21 are also spaced simultaneously, cannot water filling.
As shown in Figure 3, a kind of method that uses the directed drilling rod that expands coal seam crackle scale, adopts following steps: the first, in the position for the treatment of working seam work selection prebored hole, and described drilling rod is connected with rig, drill bit 6 respectively; The second, use the outer tube 1 bottom shutoff of hole packer 5 to drilling rod, and connect high-pressure water pipe 7; The 3rd, handle 11 angular ranges of adjusting in described drilling rod make it to reach pre-provisioning request; Conventionally handle 11 is adjusted angular range at 0～90 °.The 4th, rotate described drilling rod and make the angle of its first water filling seam 12 consistent with the predetermined angular of handle 11 in described step 2; The 5th, open the valve 4 in described drilling rod, make the first water filling seam 11 and the second water filling stitch 21 and overlap, by high-pressure water pipe 7 to water filling in described drilling rod; The 6th, in described drilling rod, current divider 3 is laterally shunted the water under high pressure in step 4 to be injected into inside, coal seam from weep hole 13, the inner directed water filling of the linear plane crack that forms, coal seam; The 7th, when water filling crack in step 5 reaches after requirement, close the valve 4 in described drilling rod, no longer by described drilling rod water filling; Meanwhile, from the described drilling rod of interior extraction of holing; The 8th, use hole packer to the shutoff again of holing in step 6, from the high-pressure water pipe 7 that leaves to boring in water filling, make cracks in coal seam extend expansion according to set direction, until whole coal seam crack depth reaches exploitation requirement.
Real work use procedure of the present invention: first, on coal seam, select the pre-position of digging that drilling rod is put into behind precalculated position, according to the on-the-spot needs of practice of construction, adjust the angular range of handle, the present invention by handle control angle at 30 °, now, being 30 ° from the water of high-voltage tube injection outer tube enters in outer tube.Subsequently, Open valve, makes the first water filling seam overlap with the second water filling seam.Then, open high-pressure hydraulic pump, water after pressurization promptly flows into the current divider inner sleeve from the first water filling seam and the second water filling seam, simultaneously, current divider laterally separates the water under high pressure heading into from bottom fast through delivery port and sprays into inside, coal seam, be subject to the coal seam of high-voltage linear water flow jet, can form linear orientation water filling crack therein, thereby reach the object in directional hydraulic fracturing coal seam.
With reference to drawings and Examples, the present invention is schematically described above, this description does not have restricted.Those of ordinary skill in the art will be understood that in actual applications, and in the present invention, the set-up mode of each parts some all may occur changes, and other staff also may make similar Design under its enlightenment.Only it is pointed out that otherwise depart from the design aim of this type, all apparent changes and similar Design thereof, within being all included in protection scope of the present invention.
Claims (5)
1. a directed drilling rod that expands coal seam crackle scale, comprise the outer tube of hollow, it is characterized in that, described outer sleeve bottom arranged outside jug, is provided with the first water filling seam on described outer sleeve bottom circumference, described outer tube top is provided with weep hole, described outer tube inside is provided with inner sleeve, the top of described inner sleeve is provided with current divider, on the circumference of described inner sleeve bottom, is provided with the second water filling seam, between described the first water filling seam and described the second water filling seam, is provided with valve.
2. the directed drilling rod that expands coal seam crackle scale according to claim 1, is characterized in that, the angular range between described handle and described outer sleeve bottom transverse axis is 0～90 °.
3. the directed drilling rod that expands coal seam crackle scale according to claim 1, is characterized in that, described the first water filling is sewn on position and described the second water filling on described outer tube circumference and is sewn on position consistency on described inner sleeve circumference.
4. a method that uses drilling rod as claimed in claim 1 to expand coal seam crackle scale:
The first, in the position for the treatment of working seam work selection prebored hole, and described drilling rod is connected with rig, drill bit respectively;
The second, use hole packer to drilling rod bottom shutoff, and connect high-pressure water pipe;
The 3rd, the handle angle scope of adjusting in described drilling rod makes it to reach pre-provisioning request;
The 4th, rotate described drilling rod and make the angle of its first water filling seam consistent with the predetermined angular of handle in described step 2;
The 5th, open the valve in described drilling rod, make the first water filling seam stitch and overlap with the second water filling, by high-pressure water pipe to water filling in described drilling rod;
The 6th, in described drilling rod, current divider is laterally shunted the water under high pressure in step 4 to be injected into inside, coal seam from weep hole, the inner directed water filling of the linear plane crack that forms, coal seam;
The 7th, when water filling crack in step 5 reaches after requirement, close the valve in described drilling rod, no longer by described drilling rod water filling; Meanwhile, from the described drilling rod of interior extraction of holing;
The 8th, use hole packer to the shutoff again of holing in step 6, from the high-pressure water pipe 7 that leaves to boring in water filling, make cracks in coal seam extend expansion according to set direction, until whole coal seam crack depth reaches exploitation requirement.
5. use according to claim 4 the directed drilling rod method that expands coal seam crackle scale, it is characterized in that, in described step 3, handle is adjusted angular range at 0～90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120394.4A CN103939074B (en) | 2014-03-27 | 2014-03-27 | A kind of drilling rod orienting expansion coal seam crackle scale and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410120394.4A CN103939074B (en) | 2014-03-27 | 2014-03-27 | A kind of drilling rod orienting expansion coal seam crackle scale and using method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103939074A true CN103939074A (en) | 2014-07-23 |
| CN103939074B CN103939074B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410120394.4A Expired - Fee Related CN103939074B (en) | 2014-03-27 | 2014-03-27 | A kind of drilling rod orienting expansion coal seam crackle scale and using method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4089374A (en) * | 1976-12-16 | 1978-05-16 | In Situ Technology, Inc. | Producing methane from coal in situ |
| SU1701896A1 (en) * | 1989-02-01 | 1991-12-30 | Криворожский горнорудный институт | Method of improvement of permeability of rocks in place of their occurrence and equipment for its realization |
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN103133028A (en) * | 2013-03-12 | 2013-06-05 | 河南理工大学 | Underground coal seam hydrofracture crack oriented developing method |
| CN103306657A (en) * | 2013-06-28 | 2013-09-18 | 陕西煤业化工技术研究院有限责任公司 | Coal-seam slotting pressure-relief anti-reflection and slit groove retaining device and method |
| CN203879393U (en) * | 2014-03-27 | 2014-10-15 | 中国人民武装警察部队后勤学院 | Drill pipe for directionally expanding coal bed crack scales |
-
2014
- 2014-03-27 CN CN201410120394.4A patent/CN103939074B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4089374A (en) * | 1976-12-16 | 1978-05-16 | In Situ Technology, Inc. | Producing methane from coal in situ |
| SU1701896A1 (en) * | 1989-02-01 | 1991-12-30 | Криворожский горнорудный институт | Method of improvement of permeability of rocks in place of their occurrence and equipment for its realization |
| CN102071921A (en) * | 2010-12-30 | 2011-05-25 | 河南理工大学 | Underground drilling and fracturing-integrated staged fracturing device and gas drainage process |
| CN103133028A (en) * | 2013-03-12 | 2013-06-05 | 河南理工大学 | Underground coal seam hydrofracture crack oriented developing method |
| CN103306657A (en) * | 2013-06-28 | 2013-09-18 | 陕西煤业化工技术研究院有限责任公司 | Coal-seam slotting pressure-relief anti-reflection and slit groove retaining device and method |
| CN203879393U (en) * | 2014-03-27 | 2014-10-15 | 中国人民武装警察部队后勤学院 | Drill pipe for directionally expanding coal bed crack scales |
Non-Patent Citations (2)
| Title |
|---|
| 孙守山等: "《波兰煤矿坚硬顶板定向水力压裂技术》", 《煤炭科学技术》 * |
| 富向等: "《穿煤层钻孔定向水压致裂的数值仿真》", 《东北大学学报（自然科学版）》 * |
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| CN103939074B (en) | 2016-08-17 |
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