CN101463708A - Annular hydraulic jet drilling bit and anchor bar hole hydraulic jet construction method for bad ground - Google Patents
Annular hydraulic jet drilling bit and anchor bar hole hydraulic jet construction method for bad ground Download PDFInfo
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- CN101463708A CN101463708A CNA2009100664181A CN200910066418A CN101463708A CN 101463708 A CN101463708 A CN 101463708A CN A2009100664181 A CNA2009100664181 A CN A2009100664181A CN 200910066418 A CN200910066418 A CN 200910066418A CN 101463708 A CN101463708 A CN 101463708A
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Abstract
The invention relates to an annular hydraulic jet bit and a construction method for the bolthole hydraulic jet of complicated strata. The bottom end of the annular hydraulic jet bit is provided with two or more than two jet injection holes, high-speed water flows from the jet injection holes cut and flush the strata, a power head drives an externally flat double-wall drill rod and the annular hydraulic jet bit to rotate to mix oval gravel, sand and water, and the mixture under the action of the jet injection holes is led to the ground surface by a central passage; an anchor wire is led into the bottom of a drilling hole by the central passage, a drilling tool is lifted out from the drilling hole, and finally, the operation of descending the anchor wire is completed. The hydraulic jet drilling operation is adopted for reinforcing the flushing of the bottom of the hole, thereby avoiding the disadvantage of easy abrasion of the drill bit; and the reverse circulation deslagging of the central passage for the drilling machine and the guard wall of the externally flat double-wall drill rod avoid the problems of drilling hole destabilization and drill clipping and burying caused by the easy collapse and the block falling of the wall of the hole, thereby solving the problems that the hole formation of the complicated strata is difficult and the anchor wire is hard to descend. The annular hydraulic jet bit and the construction method are proved to greatly increase the drilling efficiency of the complicated strata and greatly reduce the drilling cost.
Description
Technical field:
The present invention relates to a kind of drilling tools and job practices, especially anti-job practices and the essential jetting drill bit of this method of realization of circulating of bad ground bolthole hole jetting.
Background technology:
Ovum gravel stratum is a kind of typical unstable stratum common in the drilling project, gravel in the stratum is many based on quartzite, granite, that its essential characteristic is exactly is loose, broken, leakage and anchor cable are difficult for being lowered to, in the time of the gyration of drill bit tactite masonry, have the ovum gravel of certain degree of freedom also can produce irregular motion, this motion causes drill string vibration and turns round not steady.Drilling tool is subjected to irregular torsion in the hole, also easily the generation screw thread comes off, drilling rod fractures accident.The rig running part is subjected to unsettled shock loading, the component rapid wear.Because drill bit is worked in loose gravel layer, rock is pushed, extracts, clashes into crushing, cause the drill hole wall irregular, fall piece in the hole, cave in, block underground drilling accident and take place often, the time that is consumed is to creep into several times even tens times of other rock stratum of same thickness.Cause when creeping into drilling efficiency low, probing cost of production height.Therefore, in order to improve drilling efficiency, reduce production costs, select rational drilling technology, it is particularly important that advanced drilling technique shows.
Because the complexity on ovum gravel stratum, people have done many effective explorations and research, have designed multiple drill bit and drilling operation method.Existing ovum gravel ground anchor hole construction method adopts more: one, take out a drilling construction technology, the disadvantage of this method is exactly that footage per round trip is short, creeps into slowly inefficiency.Two, common diamond-carbide drill drilling construction technology.The shortcoming of this drilling technology is that drill bit can not withstand shocks, the easy avalanche of diamond, and carbide button is avalanche easily also, causes bit wear serious, very fast inefficacy, drilling efficiency is low when causing creeping into, probing cost of production height.Three, rock bit construction drilling technology.The shortcoming of this drilling technology is that moment of torsion is very big when creeping into, and required rig power is very big, yet creeps into slowly, and drilling efficiency is low when creeping into, probing cost of production height.
Summary of the invention:
Purpose of the present invention just is at above-mentioned the deficiencies in the prior art, and a kind of ring-type jetting drill bit and bad ground bolthole jetting job practices are provided.
The objective of the invention is to be achieved through the following technical solutions:
Ring-type jetting drill bit 6 upper ends are connected with outer flat double-wall drill pipe 5 by screw thread, are provided with in the ring-type jetting drill bit 6 bottom sluicing grooves to spray perforation 7 more than two or two.
Bad ground bolthole jetting job practices comprises following order and step:
A, with rig 1, unit head 2, swan-neck bent tube 3, water pump 4, outer flat double-wall drill pipe 5, ring-type jetting drill bit 6 is transported to the job site and installs;
B, start rig after installing, when unit head 2 drove outer flat double-wall drill pipe 5 and ring-type jetting drill bit 6 and creeps into, water pump 4 pumped into the annular clearance of outer flat double-wall drill pipe 5 with clear water, and delivers to ring-type jetting drill bit 6;
C, clear water cut, wash away the stratum through the high-velocity flow that the injection perforation 7 of ring-type jetting drill bit 6 comes out, unit head 2 drives outer flat double- wall drill pipe 5 and 6 rotations of ring-type jetting drill bit simultaneously, the stratum is formed stirring, ovum gravel, sand and water are mixed;
D, mixed ovum gravel, sand and water form negative pressure and injection under the effect of spraying perforation 7, be displaced into the face of land through the central passage of the central passage of ring-type jetting drill bit 6, outer flat double-wall drill pipe 5 and the central passage of swan-neck bent tube 3;
E, when boring arrives projected depth, stop to supply water, finish the probing task;
F, with anchor cable by outer flat double-wall drill pipe 5 central passage and the central passage of ring-type jetting drill bit 6 be lowered into the boring end, again boring is proposed drilling tool, finish anchor cable and be lowered to construction.
Purpose of the present invention can also be achieved through the following technical solutions:
The set injection perforation 7 in ring-type jetting drill bit 6 bottoms is that the center with ring-type jetting drill bit 6 is that center of circle equal angles distributes.The Center Gap that sprays perforation 7 is 90 °-180 °, sprays the diameter 7-10mm of perforation (7).
Beneficial effect: solve the difficult problem that bad ground pore-forming difficulty and anchor cable are difficult for being lowered to.The employing jetting is crept into, strengthened the souring at the bottom of the hole, avoided conventional bit shortcoming easy to wear, anti-deslagging and the outer flat double-wall drill pipe retaining wall of circulating of drilling tool central passage avoided the hole wall piece that caves in easily to cause and the shortcoming of boring unstability and bit freezing bury drills be lowered to anchor cable by the drilling tool central passage at last, avoided so fully owing to drilling tool proposes boring that boring the causes accident of subsiding, through test, significantly improve the drilling efficiency of bad ground, greatly reduce drilling cost.
Description of drawings:
Accompanying drawing 1: bad ground bolthole jetting job practices sectional view
Accompanying drawing 2: accompanying drawing 1 ring-type jetting drill bit 6 sectional views
Accompanying drawing 3: accompanying drawing 2 ring-type jetting drill bits 6 upward views
1 rig, 2 unit heads, 3 swan-neck bent tubes, 4 water pumps, 5 outer flat double-wall drill pipes, 6 ring-type jetting drill bits, 7 spray perforation.
Concrete real-time mode:
Be described in further detail below in conjunction with drawings and Examples:
Ring-type jetting drill bit 6 upper ends are connected with outer flat double-wall drill pipe 5 by screw thread, and the bottom is provided with sprays perforation 7 more than two or two.
The anti-job practices that circulates of bad ground bolthole jetting comprises following order and step:
A, with rig 1, unit head 2, swan-neck bent tube 3, water pump 4, outer flat double-wall drill pipe 5, ring-type jetting drill bit 6 is transported to the job site and installs;
B, start rig after installing, when unit head 2 drove outer flat double-wall drill pipe 5 and ring-type jetting drill bit 6 and creeps into, water pump 4 pumped into the annular clearance of outer flat double-wall drill pipe 5 with clear water, and delivers to ring-type jetting drill bit 6;
C, clear water cut, wash away the stratum through the high-velocity flow that the injection perforation 7 of ring-type jetting drill bit 6 comes out, unit head 2 drives outer flat double- wall drill pipe 5 and 6 rotations of ring-type jetting drill bit simultaneously, the stratum is formed stirring, ovum gravel, sand and water are mixed;
D, mixed ovum gravel, sand and water form negative pressure and injection under the effect of spraying perforation 7, be displaced into the face of land through the central passage of the central passage of ring-type jetting drill bit 6, outer flat double-wall drill pipe 5 and the central passage of swan-neck bent tube 3;
E, when boring arrives projected depth, stop to supply water, finish the probing task;
F, with anchor cable by outer flat double-wall drill pipe 5 central passage and the central passage of ring-type jetting drill bit 6 be lowered into the boring end, again boring is proposed drilling tool, finish anchor cable and be lowered to construction.
Purpose of the present invention can also be achieved through the following technical solutions:
The set injection perforation 7 in ring-type jetting drill bit 6 bottoms is that the center with ring-type jetting drill bit 6 is that center of circle equal angles distributes.The Center Gap that sprays perforation 7 is 90 °-180 °, sprays the diameter 7-10mm of perforation (7).
Preparation has two ring-type jetting drill bits 6 that spray perforation 7, in the low end face sluicing groove of the annulus of ring-type jetting drill bit 6, be that 7, two Center Gap that spray perforation 7 of injection perforation that center of circle symmetry is offered Φ=10mm are 180 ° with the center of ring-type jetting drill bit 6.Ring-type jetting drill bit 6 upper ends are provided with screw thread, and two the ring-type jetting drill bits 6 that spray perforation 7 that have that prepare are connected with outer flat double-wall drill pipe 5.With itself and rig 1, unit head 2, swan-neck bent tube 3, water pump 4, outer flat double-wall drill pipe 5, together be transported to job site and installation, install and start rig, unit head 2 drives outer flat double-wall drill pipe 5 and creeps into, the injection perforation 7 of ring-type jetting drill bit 6 delivered to clear water by water pump 4 from the annular clearance of outer flat double-wall drill pipe 5 simultaneously, the high-velocity flow that ejects through injection perforation 7 cuts the stratum, wash away, rig 1 drives outer flat double- wall drill pipe 5 and 6 rotations of ring-type jetting drill bit simultaneously, the stratum is formed stirring, make the ovum gravel, sand and water mix formation and mix three streams, mix three streams and under the effect of spraying perforation 7, form negative pressure and injection, central passage through ring-type jetting drill bit 6, the central passage of outer flat double-wall drill pipe 5 and swan-neck bent tube 3 central passages are discharged the face of land and are formed anti-circulation, in the process of creeping into, the ovum gravel of big particle diameter also has push effect at the bottom of 6 pairs of holes of ring-type jetting drill bit, cause it to move to the sidewall of boring, so just prevented the stifled problem of card, guarantee the formation of complete boring, when boring arrives projected depth, stop to supply water, finish the probing task, at last anchor cable is lowered into the boring end smoothly by the central passage of outer flat double-wall drill pipe 5 and the central passage of ring-type jetting drill bit 6, drilling tool is proposed boring, finish the bad ground anchor cable and be lowered to work, solved the difficult problem that the bad ground anchor cable is difficult for being lowered to.
Preparation has three ring-type jetting drill bits 6 that spray perforation 7, in the low end face sluicing groove of the annulus of ring-type jetting drill bit 6, be that 7, three Center Gap that spray perforation 7 of injection perforation that center of circle equal angles is offered Φ=8mm are 120 ° with the center of ring-type jetting drill bit 6.Ring-type jetting drill bit 6 upper ends are provided with screw thread, and three the ring-type jetting drill bits 6 that spray perforation 7 that have that prepare are connected with outer flat double-wall drill pipe 5.With itself and rig 1, unit head 2, swan-neck bent tube 3, water pump 4, outer flat double-wall drill pipe 5, together be transported to job site and installation, install and start rig, unit head 2 drives outer flat double-wall drill pipe 5 and creeps into, the injection perforation 7 of ring-type jetting drill bit 6 delivered to clear water by water pump 4 from the annular clearance of outer flat double-wall drill pipe 5 simultaneously, the high-velocity flow that ejects through injection perforation 7 cuts the stratum, wash away, rig 1 drives outer flat double- wall drill pipe 5 and 6 rotations of the special-purpose ring-type jetting of bad ground drill bit simultaneously, the stratum is formed stirring, make the ovum gravel, sand and water mix formation and mix three streams, mix three streams and under the effect of spraying perforation 7, form negative pressure and injection, central passage through ring-type jetting drill bit 6, the central passage of outer flat double-wall drill pipe 5 and swan-neck bent tube 3 central passages are discharged the face of land and are formed anti-circulation, in the process of creeping into, the ovum gravel of big particle diameter also has push effect at the bottom of 6 pairs of holes of ring-type jetting drill bit, cause it to move to the sidewall of boring, so just prevented the stifled problem of card, guarantee the formation of complete boring, when boring arrives projected depth, stop to supply water, finish the probing task, at last anchor cable is lowered into the boring end smoothly by the central passage of outer flat double-wall drill pipe 5 and the central passage of ring-type jetting drill bit 6, drilling tool is proposed boring, finish the bad ground anchor cable and be lowered to work, solved the difficult problem that the bad ground anchor cable is difficult for being lowered to.
Preparation has four ring-type jetting drill bits 6 that spray perforation 7, in the low end face sluicing groove of the annulus of ring-type jetting drill bit 6, be that 7, four Center Gap that spray perforation 7 of injection perforation that center of circle symmetry is offered Φ=7mm are 90 ° with the center of ring-type jetting drill bit 6.Ring-type jetting drill bit 6 upper ends are provided with screw thread, and four the ring-type jetting drill bits 6 that spray perforation 7 that have that prepare are connected with outer flat double-wall drill pipe 5.With itself and rig 1, unit head 2, swan-neck bent tube 3, water pump 4, outer flat double-wall drill pipe 5, together be transported to job site and installation, install and start rig, unit head 2 drives outer flat double-wall drill pipe 5 and creeps into, the injection perforation 7 of ring-type jetting drill bit 6 delivered to clear water by water pump 4 from the annular clearance of outer flat double-wall drill pipe simultaneously, the high-velocity flow that ejects through injection perforation 7 cuts the stratum, wash away, rig 1 drives outer flat double- wall drill pipe 5 and 6 rotations of the special-purpose ring-type jetting of bad ground drill bit simultaneously, the stratum is formed stirring, make the ovum gravel, sand and water mix formation and mix three streams, mix the central passage that three streams form negative pressure under the effect of spraying perforation 7 and injection passes through ring-type jetting drill bit 6, the central passage of outer flat double-wall drill pipe 5 and swan-neck bent tube 3 central passages are discharged the face of land and are formed anti-circulation, in the process of creeping into, the ovum gravel of big particle diameter also has push effect at the bottom of 6 pairs of holes of ring-type jetting drill bit, cause it to move to the sidewall of boring, so just prevented the stifled problem of card, guarantee the formation of complete boring, when boring arrives projected depth, stop to supply water, finish the probing task, at last anchor cable is lowered into the boring end smoothly by the central passage of outer flat double-wall drill pipe 5 and the central passage of ring-type jetting drill bit 6, drilling tool is proposed boring, finish the bad ground anchor cable and be lowered to work, solved the difficult problem that the bad ground anchor cable is difficult for being lowered to.
Claims (4)
1, a kind of ring-type jetting drill bit is characterized in that, ring-type jetting drill bit (6) upper end is connected with outer flat double-wall drill pipe (5) by screw thread, is provided with in the bottom sluicing groove and sprays perforation (7) more than two or two.
According to the described jetting drill bit of claim 1, it is characterized in that 2, set injection perforation (7) is that the center with ring-type jetting drill bit (6) is that center of circle equal angles distributes in ring-type jetting drill bit (6) the bottom sluicing groove.
According to claim 1 or 2 described jetting drill bits, it is characterized in that 3, the Center Gap that sprays perforation (7) is 90
0-180
0, the diameter 7-10mm of injection perforation (7).
4, the anti-job practices that circulates of bad ground bolthole jetting comprises rig (1), unit head (2), swan-neck bent tube (3), water pump (4), outer flat double-wall drill pipe (5), and ring-type jetting drill bit (6) is characterized in that, comprises following order and step:
A, with rig (1), unit head (2), swan-neck bent tube (3), water pump (4), outer flat double-wall drill pipe (5), ring-type jetting drill bit (6) is transported to the job site and installs;
B, start rig after installing, unit head (2) drives outer flat double-wall drill pipe (5) and ring-type jetting drill bit (6) when creeping into, and water pump (4) pumps into the annular clearance of flat double-wall drill pipe (5) outward with clear water, and delivers to ring-type jetting drill bit (6);
C, clear water cut, wash away the stratum through the high-velocity flow that the injection perforation (7) of ring-type jetting drill bit (6) comes out, unit head (2) drives outer flat double-wall drill pipe (5) and ring-type jetting drill bit (6) rotation simultaneously, the stratum is formed stirring, ovum gravel, sand and water are mixed;
D, mixed ovum gravel, sand and water form negative pressure and injection under the effect of spraying perforation (7), be displaced into the face of land through the central passage of ring-type jetting drill bit (6), the central passage of outer flat double-wall drill pipe (5) and the central passage of swan-neck bent tube (3);
E, when boring arrives projected depth, stop to supply water, finish the probing task;
F, with anchor cable by outer flat double-wall drill pipe (5) central passage and the central passage of ring-type jetting drill bit (6) be lowered into the boring end, again boring is proposed drilling tool, finish anchor cable and be lowered to construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100664181A CN101463708A (en) | 2009-01-08 | 2009-01-08 | Annular hydraulic jet drilling bit and anchor bar hole hydraulic jet construction method for bad ground |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100664181A CN101463708A (en) | 2009-01-08 | 2009-01-08 | Annular hydraulic jet drilling bit and anchor bar hole hydraulic jet construction method for bad ground |
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| CN101463708A true CN101463708A (en) | 2009-06-24 |
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| CNA2009100664181A Pending CN101463708A (en) | 2009-01-08 | 2009-01-08 | Annular hydraulic jet drilling bit and anchor bar hole hydraulic jet construction method for bad ground |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899950A (en) * | 2010-07-14 | 2010-12-01 | 中国矿业大学 | Method for hydraulically drilling high-stress coal |
| CN102392452A (en) * | 2011-11-29 | 2012-03-28 | 北京建工一建工程建设有限公司 | Construction method for forming holes on soil nail wall by water punching |
| CN102661122A (en) * | 2012-03-20 | 2012-09-12 | 陈月辉 | Coaxial and automatic water feeder for water drill |
| CN102966308A (en) * | 2012-11-23 | 2013-03-13 | 符祥怡 | Hydraulic well drilling, cavity drilling and hole drilling technology |
| CN103016044A (en) * | 2012-11-27 | 2013-04-03 | 河南理工大学 | Comprehensive method of drilling, permeability increasing, repairing and gas-driven displacing of drill hole underground coal mine |
| CN104514487A (en) * | 2013-09-30 | 2015-04-15 | 周升风 | Reverse circulation drilling device and process for soft projecting coal seam |
| CN108193676A (en) * | 2017-12-29 | 2018-06-22 | 姚强 | A kind of anchor rod construction method and its construction equipment |
-
2009
- 2009-01-08 CN CNA2009100664181A patent/CN101463708A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899950A (en) * | 2010-07-14 | 2010-12-01 | 中国矿业大学 | Method for hydraulically drilling high-stress coal |
| CN101899950B (en) * | 2010-07-14 | 2013-02-13 | 中国矿业大学 | Method for hydraulically drilling high-stress coal |
| CN102392452A (en) * | 2011-11-29 | 2012-03-28 | 北京建工一建工程建设有限公司 | Construction method for forming holes on soil nail wall by water punching |
| CN102661122A (en) * | 2012-03-20 | 2012-09-12 | 陈月辉 | Coaxial and automatic water feeder for water drill |
| CN102661122B (en) * | 2012-03-20 | 2014-11-05 | 陈月辉 | Coaxial and automatic water feeder for water drill |
| CN102966308A (en) * | 2012-11-23 | 2013-03-13 | 符祥怡 | Hydraulic well drilling, cavity drilling and hole drilling technology |
| CN103016044A (en) * | 2012-11-27 | 2013-04-03 | 河南理工大学 | Comprehensive method of drilling, permeability increasing, repairing and gas-driven displacing of drill hole underground coal mine |
| CN103016044B (en) * | 2012-11-27 | 2014-12-10 | 河南理工大学 | Comprehensive method of drilling, permeability increasing, repairing and gas-driven displacing of drill hole underground coal mine |
| CN104514487A (en) * | 2013-09-30 | 2015-04-15 | 周升风 | Reverse circulation drilling device and process for soft projecting coal seam |
| CN108193676A (en) * | 2017-12-29 | 2018-06-22 | 姚强 | A kind of anchor rod construction method and its construction equipment |
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Open date: 20090624 |