CN101413380B - Multifunctional self-oscillation flow jet flow drill - Google Patents
Multifunctional self-oscillation flow jet flow drill Download PDFInfo
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- CN101413380B CN101413380B CN2008102330833A CN200810233083A CN101413380B CN 101413380 B CN101413380 B CN 101413380B CN 2008102330833 A CN2008102330833 A CN 2008102330833A CN 200810233083 A CN200810233083 A CN 200810233083A CN 101413380 B CN101413380 B CN 101413380B
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- spool
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- oscillation
- cutting head
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Abstract
The invention relates to a multifunctional self-oscillation jet drill bit. The prior similar product not only has shallow drilling depth and complex structure but also has large resistance loss and short service life of a drill bit, can not repeatedly switch drilling and groove cutting during the drilling process, and limits the application scope. A crushing blade and a valve body are arranged inside a cutting head body of the drill bit; a first offsetting spring in the valve body is matched with a valve core A in the form of sliding; a valve core B is matched with a second offsetting spring for operation under the action of a lined ring, a washer and the valve body together; and the valve core and a limber hole of the valve body are matched for use with a self-oscillation nozzle. The multifunctional self-oscillation jet drill bit adopts high-pressure water as power to realize repeated switching between drilling and groove cutting of coal seam and terrane, not only has a simple structure and is flexible to switch but also can promote development of coal seam fissure through oscillation jet generated by the nozzle, strengthens the permeability of the coal seam, improves the gas extraction rate, particularly has obvious effect on low-permeability coal seam, and widely promotes and applies the fluid technology of the high-pressure water in the fields of drilling and gas extraction of the low-permeability coal seam.
Description
Technical field:
The present invention relates to the flow jet flow drill technology, be specifically related to be used for the boring in various rock stratum and coal seam, the flow jet flow drill of grooving, be specially adapted to the boring and the grooving operation in the various apertures of low-air-permeability coal-bed gas extraction, coal seam.
Background technology:
High pressure water jet is a new technology that grows up, and the water under high pressure that it is concentrated by energy height is implemented fragmentation and grooving to coal, rock stratum, to improve the permeability of coal rock layer.At present, adopt high pressure water jet waterpower drill bit operating type more single, after drilling rod advances boring, can not carry out the grooving operation continuously.China Patent No. is the waterpower drill bit of 03122735 remote controlled boring, slot and correction, though can realize water jet boring and two kinds of operations of grooving, the drill bit conversion of operation state must provide the power of pressure oil as switching in addition to it.In addition, China Patent No. is 200510048133 punched hole capable of water pressure switch, the high-pressure water jet drill bit device of slot, though possess the function of switching repeatedly, but its operating pressure is big, complex structure, and drag losses is big, be only applicable to the large aperture and creep into, and be not suitable in the soft seam.Because the limitation of above-mentioned waterpower drill bit makes high pressure water jet be difficult to promote better creeping in the field of low-air-permeability coal-bed gas extraction.
Summary of the invention:
The objective of the invention is at the similar products operating efficiency lowlyer, drilling depth is shallow, complex structure, and shortcoming such as drag losses is big, and application life is short provides a kind of multifunctional self-oscillation flow jet flow drill that integrates boring, grooving function.
The present invention is achieved through the following technical solutions its goal of the invention:
This multifunctional self-oscillation flow jet flow drill comprises the front end drill bit that has axial nozzle and has the cutting head of radial nozzles.Cutting head is the hollow structure that front and back connect, and valve body is equipped with at the cutting head middle part, and the rear portion is the press water interface.Valve body is the front and back communicating structure, limbers is radially arranged on the terminal sidewall, be communicated with the radial nozzles on the cavity, spool A and spool B are housed in the valve body, anterior spool A is front end sealing and the hollow tubular structure that radial hole is arranged, spool A front end face greater than its over against the outlet pass of valve body front end, leave the water flowing gap between the periphery of spool A and the valve body, there is a flange at the middle part of spool A, be with first back-moving spring and second back-moving spring before and after the flange respectively, the first back-moving spring front end is against the end in the valve body front end, and the rear end of second back-moving spring is against the front end face of spool B; Spool B is enclosed within the tail end of spool A, and end leaves a limbers less than spool A internal diameter, and A is communicated with spool; Spool B is in the position of the radially limbers on the blocking-up valve body when hydraulic pressure does not reach opening, multifunctional self-oscillation flow jet flow drill is the boring duty; Spool B opens the radially limbers on the valve body when hydraulic pressure reaches opening, multifunctional self-oscillation flow jet flow drill is the joint-cutting duty, and described cutting head front portion is provided with the pressurize nonreturn valve core.
The radially limbers of described spool A front end has 1-4, and diameter is 0.5～8mm.
The two ends of described cavity are provided with front end filter and rear end filter, cinder enters drill bit internal around preventing in the course of work multifunctional self-oscillation flow jet flow drill, the front portion is provided with the pressurize nonreturn valve core, prevents that the press water that is sprayed by axial nozzle in the course of work from passing back into cutting head.The valve body end is provided with the front end back-up ring, and the cutting head afterbody is provided with the rear end back-up ring, can not move backward when guaranteeing the valve body action.
The present invention compared with prior art has the following advantages and beneficial effect:
1, this drill bit is owing to adopt first back-moving spring to cooperate slip with spool A in valve body, under grommet, packing ring and valve body acting in conjunction, the spool B and the second back-moving spring coordinating operation, simple in structure, switch flexibly, the loss resistance is little, drilling depth is long, and can in drilling process, carry out waterpower boring and grooving operation, the oscillating jet that produces can promote the development of cracks in coal seam, strengthened the permeability in coal seam, be applicable to the bore operation in the various apertures of soft, hard coal seam, be specially adapted to the gas pumping operation of soft seam;
2, in high gas low air permeability coal seam in the boring/joint-cutting process, because radial nozzles and axial nozzle adopt the self-oscillation nozzle, produce oscillating jet, its impact force improves 2.5 times than common jet, thereby improves the rock breaking capacity of jet, and then the degree of depth of boring is increased greatly, oscillating jet can promote the development of cracks in coal seam in addition, strengthen the permeability in coal seam, be beneficial to the discharge of gas, improved the extraction rate of gas;
3, when grooving was carried out in the unlatching of radial oscillation nozzle, part water can cool off drill bit effectively from axially via spool A limbers, prolongs the application life of drill bit, and the top cinder is discharged smoothly, improves into porosity;
4, the broken blade that is provided with of cutting head tail of cavity body can effective broken large volume hard sillar or coal cinder, guarantees that the coal petrography powder discharges smoothly, thereby reduces the generation of bit freezing phenomenon;
5, be provided with the pressurize nonreturn valve core in the axial oscillation nozzle head cavity, guaranteed the quasi static pressure of oscillating jet in boring,, realized the effect of solid hole to support hole wall; Each when increasing run of steel, the pressurize one way valve also can unidirectional locking, prevents that gas and cinder from discharging along the drilling rod inner chamber, avoids the release hole of collapsing;
As seen, with the obvious advantage, make high pressure water jet obtain more extensive popularization in the field of creeping into of low-air-permeability coal-bed gas extraction.
Description of drawings:
Fig. 1 is the multifunctional self-oscillation flow jet flow drill axial section;
Fig. 2 is a leading portion drill bit axial section;
Fig. 3 is the cutting head axial section;
Fig. 4 is the left view of Fig. 3;
Fig. 5 is the elevation of front end filter;
Fig. 6 is a pressurize nonreturn valve core outside drawing;
Fig. 7 is the valve body axial section;
Fig. 8 is a spool A axial section;
Fig. 9 is the left view of Fig. 8;
Figure 10 is a spool B axial section;
Figure 11 is the elevation of rear end filter;
Figure 12 is a self-excited oscillation pulse nozzle axial section.
In Fig. 1 to Figure 11:
1--front end drill bit; The 2--cutting head; 1-1--three wings cutter;
The axial nozzle of 1-2--; 2-1--front end filter; 2-2--pressurize one way valve;
The 2-3--valve body; 2-4--first back-moving spring; 2-5--spool A;
2-6--front end back-up ring; 2-7--second back-moving spring; The 2-8--radial nozzles;
The broken blade of 2-9--; 2-10--rear end back-up ring; 2-11--rear end filter;
2-12--spool B.
The specific embodiment:
In conjunction with Fig. 1 to Figure 12, existing embodiment to this multifunctional self-oscillation flow jet flow drill describes:
This multifunctional self-oscillation flow jet flow drill comprises front end drill bit 1 that has axial nozzle 1-1 and the cutting head 2 that has radial nozzles 2-8.
In conjunction with Fig. 3 and Fig. 4 as seen, cutting head 2 is the hollow structure that front and back connect, and the afterbody periphery of cutting head has broken blade 2-9.The two ends of cavity are provided with front end filter 2-1 and rear end filter 2-11, see Fig. 5 and Figure 11, cinder enters drill bit internal around preventing in the course of work multifunctional self-oscillation flow jet flow drill, the front portion is provided with pressurize nonreturn valve core 2-2, see Fig. 6, prevent that the press water that is sprayed by axial nozzle 1-1 in the course of work from passing back into cutting head.
Valve body 2-3 is equipped with at cutting head 2 middle parts, and the rear portion is the press water interface.Referring to Fig. 7, valve body 2-3 is the front and back communicating structure, and limbers is radially arranged on the terminal sidewall, is communicated with the radial nozzles 2-8 on the cavity.Spool A2-5 and spool B2-12 are housed in the valve body, referring to Fig. 8 and Fig. 9, anterior spool A2-5 is front end sealing and the hollow tubular structure that radial hole is arranged, the radially limbers of spool A2-5 front end has 1-4, diameter is 0.5～8mm, spool A2-5 front end face greater than its over against the outlet pass of valve body front end, leave the water flowing gap between the periphery of spool A2-5 and the valve body, there is a flange at the middle part of spool A2-5, be with the first back-moving spring 2-4 and the second back-moving spring 2-7 before and after the flange respectively, the first back-moving spring 2-4 front end is against the end in the valve body front end, and the rear end of the second back-moving spring 2-7 is against the front end face of spool B2-12.Referring to Figure 10, spool B2-12 is enclosed within the tail end of spool A2-5, and end leaves a limbers less than spool A2-5 internal diameter, and A2-5 is communicated with spool; Spool B2-12 is in the position of the radially limbers on the blocking-up valve body when hydraulic pressure does not reach opening, multifunctional self-oscillation flow jet flow drill is the boring duty; Spool B2-12 opens the radially limbers on the valve body when hydraulic pressure reaches opening, multifunctional self-oscillation flow jet flow drill is the joint-cutting duty.The valve body end is provided with front end back-up ring 2-6, and the cutting head afterbody is provided with rear end back-up ring 2-10, can not move backward when guaranteeing the valve body action.In this valve body, the first back-moving spring 2-4 cooperates slip with spool A2-5, under front end back-up ring 2-6, rear end back-up ring 2-10 and valve body 2-3 acting in conjunction, and the spool B2-12 and the second back-moving spring 2-7 coordinating operation.
When this drill bit was used for the boring of high gas low air permeability coal seam/joint-cutting, axially nozzle 1-1 and radial nozzles 2-8 adopted the self-oscillation nozzle, and number is respectively 1-4, referring to Fig. 1.
When this drill bit was used for the boring in high gas and the better coal seam of gas permeability/joint-cutting, axially nozzle 1-1 and radial nozzles 2-8 also can adopt common conical nozzle, and number also is preferably 1-4.
Claims (6)
1. a multifunctional self-oscillation flow jet flow drill comprises front end drill bit (1) that has axial nozzle (1-1) and the cutting head (2) that has radial nozzles (2-8); It is characterized in that: the hollow structure that described cutting head (2) connects for front and back, valve body (2-3) is equipped with at cutting head (2) middle part, and the rear portion is the press water interface; Valve body (2-3) is the front and back communicating structure, and limbers is radially arranged on the terminal sidewall, is communicated with the radial nozzles (2-8) on the cavity; Spool A (2-5) and spool B (2-12) are housed in the valve body, anterior spool A (2-5) seals and has the hollow tubular structure of radial hole for front end, spool A (2-5) front end face greater than its over against the outlet pass of valve body front end, leave the water flowing gap between the periphery of spool A (2-5) and the valve body, there is a flange at the middle part of spool A (2-5), be with first back-moving spring (2-4) and second back-moving spring (2-7) before and after the flange respectively, first back-moving spring (2-4) front end is against the end in the valve body front end, and the rear end of second back-moving spring (2-7) is against the front end face of spool B (2-12); Spool B (2-12) is enclosed within the tail end of spool A (2-5), and end leaves a limbers less than spool A (2-5) internal diameter, is communicated with spool A (2-5); Spool B (2-12) is in the position of the radially limbers on the blocking-up valve body when hydraulic pressure does not reach opening, be the boring duty; Spool B (2-12) opens the radially limbers on the valve body when hydraulic pressure reaches opening, be the joint-cutting duty; Described cutting head (2) front portion is provided with pressurize nonreturn valve core (2-2).
2. multifunctional self-oscillation flow jet flow drill according to claim 1 is characterized in that: the afterbody periphery of described cutting head (2) has broken blade (2-9).
3. multifunctional self-oscillation flow jet flow drill according to claim 1 and 2 is characterized in that: described axial nozzle (1-1) and radial nozzles (2-8) are self-oscillation nozzle or common conical nozzle, and number is respectively 1-4.
4. multifunctional self-oscillation flow jet flow drill according to claim 1 and 2 is characterized in that: the cavity two ends of described cutting head (2) are provided with front end filter (2-1) and rear end filter (2-11).
5. multifunctional self-oscillation flow jet flow drill according to claim 1 and 2 is characterized in that: the radially limbers of described spool A (2-5) front end has 1-4, and diameter is 0.5～8mm.
6. multifunctional self-oscillation flow jet flow drill according to claim 1 and 2 is characterized in that: described valve body end is provided with front end back-up ring (2-6), and the cutting head afterbody is provided with rear end back-up ring (2-10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102330833A CN101413380B (en) | 2008-11-20 | 2008-11-20 | Multifunctional self-oscillation flow jet flow drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102330833A CN101413380B (en) | 2008-11-20 | 2008-11-20 | Multifunctional self-oscillation flow jet flow drill |
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| Publication Number | Publication Date |
|---|---|
| CN101413380A CN101413380A (en) | 2009-04-22 |
| CN101413380B true CN101413380B (en) | 2010-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102330833A Expired - Fee Related CN101413380B (en) | 2008-11-20 | 2008-11-20 | Multifunctional self-oscillation flow jet flow drill |
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| CN101975023B (en) * | 2010-10-20 | 2013-02-20 | 重庆大学 | Method and device for drilling deep and long gas drainage hole in soft coal seam along layers |
| CN102133562B (en) * | 2011-01-28 | 2012-09-26 | 重庆大学 | Multifunctional self-excited oscillation abrasive water jet generating device |
| AU2012220352B2 (en) * | 2011-02-25 | 2016-10-13 | Cmte Development Limited | Fluid drilling head with sliding gauging ring |
| CN103334723B (en) * | 2013-07-09 | 2015-10-14 | 重庆大学 | A kind of underground coal mine waterpower slot self-suction abrasive jet flow generating means and method |
| CN103527189A (en) * | 2013-10-22 | 2014-01-22 | 张晓银 | High-pressure water drilling and cutting integrated machine |
| CN103993834B (en) * | 2014-06-09 | 2015-12-02 | 平顶山市安泰华矿用安全设备制造有限公司 | A kind of hydraulic reaming system |
| CN104563871B (en) * | 2015-01-15 | 2016-09-21 | 河南理工大学 | A kind of hydraulic flushing in hole, desilting and deslagging integrated apparatus and method |
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| CN106320985B (en) * | 2016-09-18 | 2017-10-31 | 重庆大学 | Coal seam high-pressure water jet drill, which expands, cuts integrated permeability improvement device and its method |
| CN111425138B (en) * | 2020-04-03 | 2024-04-30 | 重庆大学 | Long-drilled hole forming system and method for soft protruding coal seam |
| CN111636854B (en) * | 2020-04-17 | 2022-05-27 | 河南理工大学 | Coal rock stratum drilling fixed point hydraulic fracturing balance sealing device |
| CN112922531B (en) * | 2021-02-24 | 2022-06-24 | 中煤科工集团西安研究院有限公司 | Anti-backflow directional drill bit with back flushing function and construction method thereof |
| CN113323591B (en) * | 2021-05-27 | 2024-01-26 | 中煤科工集团沈阳研究院有限公司 | Ultrahigh-pressure fluid pressure conversion device |
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| US4437525A (en) * | 1981-07-06 | 1984-03-20 | Flow Industries, Inc. | Hand held water drilling apparatus |
| US4979577A (en) * | 1983-07-08 | 1990-12-25 | Intech International, Inc. | Flow pulsing apparatus and method for down-hole drilling equipment |
| CN1451839A (en) * | 2003-04-18 | 2003-10-29 | 太原理工大学 | Hydraulic drill bit capable of remote controlling drilling, slotting and deflection correction |
| CN2685527Y (en) * | 2004-03-09 | 2005-03-16 | 中国石化集团胜利石油管理局钻井工艺研究院 | Leaf valve hydraulic pulse drill bit short section |
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| CN200989162Y (en) * | 2006-07-12 | 2007-12-12 | 中国石油大学(北京) | Hydraulic pulse cavitation jet-flow well drilling device and drill bit |
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2008
- 2008-11-20 CN CN2008102330833A patent/CN101413380B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4437525A (en) * | 1981-07-06 | 1984-03-20 | Flow Industries, Inc. | Hand held water drilling apparatus |
| US4979577A (en) * | 1983-07-08 | 1990-12-25 | Intech International, Inc. | Flow pulsing apparatus and method for down-hole drilling equipment |
| CN1451839A (en) * | 2003-04-18 | 2003-10-29 | 太原理工大学 | Hydraulic drill bit capable of remote controlling drilling, slotting and deflection correction |
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| Publication number | Publication date |
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| CN101413380A (en) | 2009-04-22 |
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