CN102587828B - Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process - Google Patents
Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process Download PDFInfo
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- CN102587828B CN102587828B CN2012100565224A CN201210056522A CN102587828B CN 102587828 B CN102587828 B CN 102587828B CN 2012100565224 A CN2012100565224 A CN 2012100565224A CN 201210056522 A CN201210056522 A CN 201210056522A CN 102587828 B CN102587828 B CN 102587828B
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Abstract
A gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process belong to soft coal seam cooperative drilling and protecting systems and process. The gas extraction and drilling cooperative drilling and protecting integrated system mainly consists of a control table, a hydraulic pump station, an air compressor, a feeding device, a drill stem, a hole protecting tube, a drill bit and the like. The hole protecting tube is located in the drill stem, and the hole protecting tube and the drill stem are synchronously connected and drill cooperatively. The depth of a drilled hole is equal to the length of the hole protecting tube. Finally, the hole protecting tube penetrates through the drill bit, and the drill stem is withdrawn while the hole protecting tube is remained in the hole to realize functions of supporting a hole wall and extracting gas. The system and the process are convenient in operation, the hole protecting tube and the drill stem realize cooperative drilling and protecting, the hole protecting tube is easy to be remained in the drilled hole, problems that the hole collapses and the hole protecting tube is difficult to be fed to the drilled hole can be resolved, the hole protecting depth is high, the hole wall can be supported more effectively, deformation and collapse are prevented, accordingly high gas extraction concentration and flow of the soft coal seams are guaranteed, and the gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and the process are particularly applicable to quite soft coal seams with the value of the firmness factor f smaller than 0,3.
Description
Technical field
The present invention relates to a kind of weak seam cooperating type and bore protecting system and technique, particularly a kind of weak seam mash gas pumping drilling bores and protects integral system and technique.
Technical background
China has 52% mine to belong to highly gassy mine, and gas control is the prerequisite that ensures the mine safety High-efficient Production.Yet China's weak seam ratio is very high, that mining area master's mining coal seams such as table mountain, Huainan, the Huaibei, Guizhou, Sichuan all belong to is soft, low thoroughly, high gas layer, and a lot of mine has coal and Gas Outburst danger.It is the effective means of administering gas that construction drill is taken out coal-bed gas in advance in advance, is also the measure that current China's coal-mine is generally taked.But at the coal seam solid coefficient
fValue is less than in 0.3 dead-soft coal seam, can deform after 90% above gas pumping hole drill, long distance collapses or even closed, thereby block Gas and mobile passage, has had a strong impact on the gas pumping effect.And mine is in order effectively to administer gas, and the drainage holes quantity of construction is a lot, and the input of manpower, fund and time is very large, and the single hole cost is very high, this has just caused gas pumping effect and gas control to drop into serious not mating.
Chinese patent, the patent No. is that CN101446178A discloses the soft projecting coal bed Wind pressure air drilling technique in a kind of down-hole, when drill bit gets into whole Kong Houxian from aperture, does not pull out of hole, and by drill pipe bore, sends into the guard aperture screen casing, pulls out of hole afterwards.Therefore, but be subject to coal (rock) soft or hard layering and drilling tool gravity effect, certainly lead to hole deviation while drilling, cause drilling track to be similar to parabola, long distance is sent in guard aperture pipe process, and hole wall is large to guard aperture pipe frictional resistance, disposable to send into overlength guard aperture pipe difficulty large; Document " firedamp taking-out discharging drilling guard aperture Discussion on Technology " test shows that make propulsion plant with high-power rig send frequent jam in the pipe process in boring, sends at most 20 m.Usually the mash gas pumping drilling hole depth, more than hundred meters, adopts this technique to send into guard aperture pipe performance difficulty in this case.
Summary of the invention
The objective of the invention is to provide a kind of weak seam mash gas pumping drilling cooperating type to bore and protect integral system and technique, solve weak seam guard aperture pipe and send into difficult problem.
The object of the present invention is achieved like this: the coal bed gas extraction hole cooperating type brill for weak seam protects integral system, and this system comprises: console, hydraulic power unit, air compressor, apparatus for feeding, drilling rod, guard aperture pipe, polyurethane foam circle and drill bit; Hydraulic power unit is connected with console by high-pressure rubber pipe, and apparatus for feeding is positioned on the guide groove of frame top, with console, by high-pressure rubber pipe, is connected; Described guard aperture pipe is positioned at drilling rod inside, is provided with some polyurethane foam circles between guard aperture pipe and drilling rod; Drilling rod is positioned at the apparatus for feeding middle part, and drill bit is installed on the drilling rod top, and the drilling rod afterbody is connected with air compressor by high-pressure rubber pipe.
Described guard aperture Guan Youshi pipe and floral tube alternately connect to form, and real pipe, floral tube and drilling rod three are isometric, and guard aperture pipe external diameter is less than drilling rod internal diameter 20mm～30mm.It is the circular eyelet of 0.5mm that the floral tube outer wall is provided with diameter, and circular eyelet spacing is not less than 80mm.
Described polyurethane foam circle length is 0.1m～0.2m, and adjacent polyurethane foam circle spacing is 5m～20m.
Weak seam gas pumping hole drill protects integral process, comprises drilling process and trip-out technique, and the drilling process concrete steps are as follows:
A. the real pipe of first segment is sent in the first segment drilling rod, real pipe pierces in coal seam with drilling rod;
B. connect a joint floral tube at real pipe end, the second section drilling rod is enclosed within outside floral tube and is connected with the first segment drilling rod, floral tube pierces in coal seam with the second section drilling rod;
C. connect joint pipe in fact at the floral tube end, the 3rd joint drilling rod is enclosed within outside real pipe and is connected with the second section drilling rod, real Guan Suidi tri-joint drilling rods pierce in coal seam together;
D. repeating step b and c, until creep into to projected depth;
Trip-out technique concrete steps are as follows:
A. rotate the guard aperture pipe, make the fragmentation of polyurethane foam circle;
B. the final section drilling rod is exited to boring together with inner reality pipe, and unload the final section drilling rod, the real pipe in the final section drilling rod is pushed in last joint drilling rod;
C. circulation step b, until exit all drilling rods.
Owing to having adopted such scheme, the present invention has following effect:
(1) the guard aperture pipe synchronously is connected with drilling rod, collaborative creeping into, and boring has many dark guard aperture pipes how long just to have.With respect to the disposable overlength guard aperture pipe of sending into, there do not is the problem that will overcome the pipe friction resistance while sending into.
(2) while pulling out of hole, drilling rod exits section by section, and the guard aperture pipe pushes section by section, and the displacement of guard aperture pipe is little, and the integrally bending distortion is little, can realize Safe withdrawing.
(3) install the polyurethane foam circle between guard aperture pipe and drilling rod, effectively fixing guard aperture pipe can ensure that guard aperture pipe and drilling rod are collaborative to creep into that guard aperture Guan Buhui is subject to the effect of drilling rod moment of torsion and destroys.
(4) the drill bit inner core is subject to guard aperture pipe thrust to impel the linkage release, and inner core moves and separates with drill bit, and during convenient the trip-out, the guard aperture pipe passes drill bit.
(5) guard aperture Guan Shiguan alternately is connected with floral tube, has ensured the intensity of guard aperture pipe on the basis that meets the mash gas extraction requirement, and effectively opposing boring distortion is collapsed.
Solve weak seam guard aperture pipe and sent into difficult problem.Reached purpose of the present invention.
Advantage: this system and technological operation are convenient, collaborative the boring of guard aperture pipe and drilling rod protected, the guard aperture pipe is easily stayed boring, can overcome serious collapse hole guard aperture pipe difficulty and send into the problem of boring, and the guard aperture degree of depth is long, more effectively the supporting hole wall, prevent distortion, cave in, thereby guarantee that the weak seam gas extraction concentration is large, flow is high, is particularly useful for solid coefficient
fThe dead-soft coal seam that value is less than 0.3.
The accompanying drawing explanation
Fig. 1 is structure chart of the present invention.
Fig. 2 is floral tube structure chart of the present invention.
Fig. 3 is real duct ligation composition of the present invention.
In figure: 1, hydraulic power unit; 2, console; 3, high-pressure rubber pipe; 4, air compressor; 5, pallet; 6, apparatus for feeding; 7, drilling rod; 8, guard aperture pipe; 8-1, floral tube; 8-2, real pipe; 9, clamper; 10, frame; 11, drill bit; 12, boring; 13, coal seam; 14, polyurethane foam circle; 15, presbyopia; 16, internal thread; 17, external screw thread.
The specific embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Embodiment 1: the coal bed gas extraction hole cooperating type brill for weak seam protects integral system,
This system comprises: console 2, hydraulic power unit 1, air compressor 4, apparatus for feeding 6, drilling rod 7, guard aperture pipe 8, polyurethane foam circle 14 and drill bit 11; Hydraulic power unit 1 is connected with console 2 by high-pressure rubber pipe 3, and apparatus for feeding 6 is positioned on the guide groove of frame 10 tops, with console 2, by high-pressure rubber pipe 3, is connected; Described guard aperture pipe 8 is positioned at drilling rod 7 inside, be provided with some polyurethane foam circles 14 between guard aperture pipe 8 and drilling rod 7, drilling rod 7 is positioned at apparatus for feeding 6 middle parts, and drill bit 11 is installed on drilling rod 7 tops, drilling rod 7 afterbodys are provided with pallet 5, and pallet 5 is connected with air compressor 4 by high-pressure rubber pipe 3.
Described guard aperture pipe 8 is comprised of floral tube 8-1 and real pipe 8-2, and real pipe 8-2, floral tube 8-1 and drilling rod 7 threes are isometric, and guard aperture pipe 8 external diameters are less than drilling rod 7 internal diameter 20mm～30mm.It is the circular eyelet of 0.5mm that floral tube 8-1 outer wall is provided with diameter, and circular eyelet spacing is not less than 80mm.
Described polyurethane foam circle length is 0.1m～0.2m, and adjacent polyurethane foam circle spacing is 5m～20m.
Weak seam gas pumping hole drill protects integral process, comprises drilling process and trip-out technique, and the drilling process concrete steps are as follows:
A. the real pipe of first segment is sent in the first segment drilling rod, real pipe pierces in coal seam with drilling rod;
B. connect a joint floral tube at real pipe end, the second section drilling rod is enclosed within outside floral tube and is connected with the first segment drilling rod, floral tube pierces in coal seam with the second section drilling rod;
C. connect joint pipe in fact at the floral tube end, the 3rd joint drilling rod is enclosed within outside real pipe and is connected with the second section drilling rod, real Guan Suidi tri-joint drilling rods pierce in coal seam together;
D. repeating step b and c, until creep into to projected depth;
Trip-out technique concrete steps are as follows:
A. rotate the guard aperture pipe, make the fragmentation of polyurethane foam circle;
B. the final section drilling rod is exited to boring together with inner reality pipe, and unload the final section drilling rod, the real pipe in the final section drilling rod is pushed in last joint drilling rod;
C. circulation step b, until exit all drilling rods.
In Fig. 1, this system is by installation compositions such as hydraulic power unit 1, console 2, air compressor 4, apparatus for feeding 6, drilling rod 7, guard aperture pipe 8, clamper 9 and drill bits 1.Wherein console 2 one ends are connected with hydraulic power unit 1, and the other end is connected with apparatus for feeding 6; Apparatus for feeding 6 is positioned at frame 10 tops; Guard aperture pipe 8 is positioned at drilling rod 7 inside.Be provided with some polyurethane foam circles 14 between guard aperture pipe 8 and drilling rod 7.Drilling rod 7, through apparatus for feeding 6 and clamper 9, enters in boring 12, and drill bit 11 is installed on its top, and it is fixing that afterbody is provided with pallet 5; Air compressor 4 is connected with pallet 5 by high-pressure rubber pipe 3.
In Fig. 2, guard aperture pipe 8 comprises floral tube 8-1 and real pipe 8-2, and the two two ends is provided with internal thread 16 and external screw thread 17.Wherein floral tube 8-2 is provided with presbyopia 15.
Implementation step: each parts of first connected system, drilling rod 7 and drill bit 13 are installed, debug system.Then start to creep into, the real pipe of first segment 8-2 is sent in first segment drilling rod 7, the real pipe of first segment 8-2 periphery installs a polyurethane foam circle 14 additional, guarantees the rotation together with first segment drilling rod 7 that the real pipe of first segment 8-2 can be stable.Start afterwards apparatus for feeding 6, real pipe 8-2 pierces in coal seam 13 with first segment drilling rod 7; At first continued access floral tube 8-1, clamper 9 pins first segment drilling rods 7, at real pipe 8-2 end, connects a joint floral tube 8-1, second section drilling rod 7 is enclosed within to floral tube 8-1 outer and be connected with first segment drilling rod 7.Clamper 9 releases, start apparatus for feeding 6, and floral tube 8-1 pierces in coal seam 13 with first segment drilling rod 7.And then the real pipe of continued access 8-2, clamper 9 pins second section drilling rods 7, at floral tube 8-1 end, connects the real pipe of joint 8-2, the 3rd joint drilling rod 7 is enclosed within to real pipe 8-2 outer and be connected with second section drilling rod 7.Clamper 9 releases, start apparatus for feeding 6, and real pipe 8-2 pierces in coal seam 13 with second section drilling rod 7.Floral tube 8-1 and real pipe 8-2 are crept in circulation so successively, while guaranteeing often to creep into 10m ~ 20m, install a polyurethane foam circle 14, until creep into to projected depth.Then rotate guard aperture pipe 8, make 14 fragmentations of polyurethane foam circle, be convenient to guard aperture pipe 8 and separate with drilling rod 7.Promote guard aperture pipe 8 and drill bit 11 inner cores are moved and separate with drill bit 11, guard aperture pipe 9 passes 0.5m from drill bit 11 inside.Then carry brill, first final section drilling rod 7 is exited to boring together with inner real pipe 8-2, and unload final section drilling rod 7, the real pipe 8-2 in final section drilling rod 7 is pushed in last joint drilling rod, circulation successively, until exit all drilling rods.Last guard aperture pipe not only can guard aperture but also can be used as gas pumping pipe mash gas extraction.
Claims (2)
1. a weak seam gas pumping hole cooperating type bores and protects integral system, and it is characterized in that: this system comprises: console, hydraulic power unit, air compressor, apparatus for feeding, drilling rod, guard aperture pipe, polyurethane foam circle and drill bit; Hydraulic power unit is connected with console, and apparatus for feeding is positioned at the frame top and is connected with console; Be provided with some polyurethane foam circles between guard aperture pipe and drilling rod; Drilling rod is positioned at the apparatus for feeding middle part, and drill bit is installed on the drilling rod top, and the drilling rod afterbody is connected with air compressor;
Described guard aperture Guan Youshi pipe and floral tube alternately connect to form, and real pipe, floral tube and drilling rod three are isometric, and guard aperture pipe external diameter is less than drilling rod internal diameter 20mm～30mm;
Described polyurethane foam circle length is 0.1m～0.2m, and adjacent polyurethane foam circle spacing is 5m～20m.
2. a weak seam gas pumping hole cooperating type bores and protects integral process, and it is characterized in that: weak seam gas pumping hole drill protects integral process, comprises drilling process and trip-out technique, and the drilling process concrete steps are as follows:
A. the real pipe of first segment is sent in the first segment drilling rod, real pipe pierces in coal seam with drilling rod;
B. connect a joint floral tube at real pipe end, the second section drilling rod is enclosed within outside floral tube and is connected with the first segment drilling rod, floral tube pierces in coal seam with the second section drilling rod;
C. connect joint pipe in fact at the floral tube end, the 3rd joint drilling rod is enclosed within outside real pipe and is connected with the second section drilling rod, real Guan Suidi tri-joint drilling rods pierce in coal seam together;
D. repeating step b and c, until creep into to projected depth;
Trip-out technique concrete steps are as follows:
A. rotate the guard aperture pipe, make the fragmentation of polyurethane foam circle;
B. the final section drilling rod is exited to boring together with inner reality pipe, and unload the final section drilling rod, the real pipe in the final section drilling rod is pushed in last joint drilling rod;
C. circulation step b, until exit all drilling rods.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100565224A CN102587828B (en) | 2012-03-06 | 2012-03-06 | Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100565224A CN102587828B (en) | 2012-03-06 | 2012-03-06 | Gas extraction and drilling cooperative drilling and protecting integrated system for soft coal seams and process |
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| CN102587828A CN102587828A (en) | 2012-07-18 |
| CN102587828B true CN102587828B (en) | 2013-12-04 |
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