CN101956525B - Down-the-hole hammer reverse concentric casing drilling tool - Google Patents
Down-the-hole hammer reverse concentric casing drilling tool Download PDFInfo
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- CN101956525B CN101956525B CN 201010275030 CN201010275030A CN101956525B CN 101956525 B CN101956525 B CN 101956525B CN 201010275030 CN201010275030 CN 201010275030 CN 201010275030 A CN201010275030 A CN 201010275030A CN 101956525 B CN101956525 B CN 101956525B
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Abstract
The invention relates to a down-the-hole (DTH) hammer reverse concentric casing drilling tool. A hollow DTH hammer is connected to a guiding drill through a semicircular block and a spline housing, wherein an outer spline which is arranged on the axial direction of the guiding drill is matched with an inner spline of an annular sleeve drill; the guiding drill 3 is designed as a reverse structure; and an annular casing drill is hung on the lower end of the sleeve through a pipe boot. Compared with the prior art, the guiding drill crashes rock in advance and transmits an impact load to the annular casing drill and drives the drill to rotate, in order to realize simultaneously performing three processes of concentrically crashing, wall protection through the casing and reverse slagging. The double air piping can simultaneously cool the spherical gear alloy of the inner and outer drills and prolong the service life of the drill. Reverse slagging can efficiently clean the hole bottom rock debris, avoid repeated crashing and prevent the drill from being blocked by the rock debris. After ending the casing drilling, the reverse drilling can be performed without exchanging the drill. The casing drill tool has simple structure, low processing cost, long service life and high drilling efficiency.
Description
Technical field:
The present invention relates to a kind of geotechnical drilling facility, particularly down-the-hole hammer reverse circulating of drilling for bad ground advances with pipe bit.
Background technology:
The DTH with simultaneous casing technology is for fragmentation, leakage, ovum gravel, the leakage efficient drilling method of troublesome zone drilling pore-forming such as cave in.It utilizes the efficient detritus of down-hole hammer, utilizes and synchronously to follow into the casing protection hole wall, realizes creeping into, retaining wall and three operations of deslagging carry out simultaneously.Existing casing drilling tool mainly is divided into eccentric drilling tool and the large class of concentric simultaneous casing drilling tool two.Facts have proved that existing down-hole hammer eccentric casing drilling tools has certain defective, for example: the boring required torque is large, and the boring concentricity is poor, and eccentric pendulum is large, and bit freezing easily occurs, and causes sleeve pipe easily to destroy greatly with the pipe resistance.
At present, common DTH Hammer Concentric Simultaneous Casing Drilling Tool mainly adopts the direct circulation deslagging.In representative products utilizes as the Symmetrix casing drilling tool of: Finland, drill bit drives outer drill bit rotary drilling, and sleeve pipe does not turn round.The drill bit of the casing drilling tool of U.S.'s Ingersoll-rand adopts the flap valve of two bias or three bias, and when turning round clockwise, the drill bit flap valve opens, and reaches the purpose that bore diameter surpasses the sleeve pipe external diameter.What U.S.'s NUMA casing drilling tool was most characteristic is, casing drilling tool is comprised of bit body, drill bit ala and backing pin, and drill bit reducing principle is to utilize the drill bit ala lower mobile bit diameter that changes in the axial direction.Above drilling system all adopts direct circulation deslagging mode, when the aperture large or complex formation constantly, direct circulation deslagging difficulty, thus cause that drilling efficiency reduces, drill tool life shortens and drilling cost improves; Meet bad ground when boring, in the time of need to obtaining the rock sample ore, be difficult to obtain the required rock sample of mineral exploration; Drilling tool structure is complicated, cost is high, and when carrying brill, flap valve is easily stuck by landwaste, and is next inconvenient to proposing drilling.CN1651711A discloses a kind of bottom hole hammer reverse circulation follow pipe drill, utilizes two flap valve structures to change bore diameter, realize that anti-concentric casing advances, but drill bit structure is complicated, and processing cost is high.Thereby, be necessary to design a kind of to the adaptable down-the-hole hammer reverse circulating concentric simultaneous casing drilling tool in aperture and stratum, and claimed structure is simple, and is reliable and stable.
Summary of the invention:
Purpose of the present invention is exactly for above-mentioned the deficiencies in the prior art, provides a kind of anti-down-hole hammer reverse concentric casing that is applicable to different bores to advance drilling tool.
The objective of the invention is to be achieved through the following technical solutions:
the down-the-hole hammer reverse circulating concentric simultaneous casing drilling tool, to be connected with spline housing by semicircle card 2 by hollow type down-hole hammer 1 to be connected with starter 3, be provided with in the axial direction external splines 16 at starter 3, and match with the internal spline 17 of ring-shaped sleeve drill bit 12, starter 3 is provided with torsion pass groove 14, the hypomere of starter 3 is provided with end spray orifice 9, the lower end of spline housing 5 is provided with driving nozzle 6, the bottom of center slagging channel 4 is provided with diffusion groove 7, the bottom of starter 3 is provided with anti-blocking boss 8, ring-shaped sleeve drill bit 12 is suspended on the lower end of sleeve pipe 10 by shoe 11, drill bit alloy 13 is embedded in the bottom face of ring-shaped sleeve drill bit 12, the upper end of ring-shaped sleeve drill bit 12 is provided with torsion pass boss 15, the hypomere of starter 3 is provided with the first power transmission step 18 and the second power transmission step 19 consists of.
Purpose of the present invention can also be achieved through the following technical solutions:
The torque-transmitting mechanisms of casing drilling tool is that the torsion pass boss 15 by the torsion pass groove 14 in starter 3 outsides and ring-shaped sleeve drill bit 12 inboards consists of, the torsion pass groove 14 of described starter 3 and the 12 torsion pass boss 15 phase interlocks of ring-shaped sleeve drill bit, but transmitting torque when turning clockwise, and both are thrown off when being rotated counterclockwise.
Shoe 11 is that two semicircular ring form, and is connected with sleeve pipe 10 by screw thread.
The impact force of down-hole hammer passes to ring-shaped sleeve drill bit 12 by the first power transmission step 18 and the second power transmission step 19, realize impacting detritus, after advancing to finish with pipe bit, with 60 ° of degree of drilling tool turning anticlockwise, starter 3 and ring-shaped sleeve drill bit 12 occlusal positions are broken away from, at the bottom of can making drilling tool lift from the hole by the external splines 16 on starter 3, also can continue downwards to creep into.
Beneficial effect: the present invention compares with existing like product, can be under the impact loading that down-hole hammer provides, utilize starter 3 to carry out leading fractured rock, and drive revolution when passing on shock loading to ring-shaped sleeve drill bit 12, realize concentric detritus, with manage and protect wall, counter three operations of deslagging that circulate are carried out simultaneously.Adopt anti-circulation deslagging effectively to avoid hole wall to wash away and the flushing liquor leakage, two gas circuit structures are the meshing gold of ball of cooling inside and outside drill bit simultaneously, improves drilling life of bit.Slew gear is not easy by landwaste stuck, has guaranteed the stability of work, implements anti-circulation deslagging effectively at the bottom of lancing door, can guarantee under different pore size, and lancing door bed rock bits, avoid the repetition fragmentation with the raising drilling efficiency effectively.Carry when boring difficult stuck by landwaste.After advancing to finish with pipe bit, need not change drilling tool, utilize inner drilling tool still can continue to implement reverse circulation drilling.This cover drilling tool structure is simple, and processing cost is low, long service life, and drilling efficiency is high.
Description of drawings:
Fig. 1 is the structure chart of down-the-hole hammer reverse circulating concentric simultaneous casing drilling tool
Fig. 2 is the A-A sectional view of Fig. 1
Fig. 3 is the B-B sectional view of Fig. 1
Fig. 4 is the fiting relation figure of starter 3 and ring-shaped sleeve drill bit 12.
Fig. 5 is the shape assumption diagram of starter 3.
Fig. 6 is anti-concentric casing tool assembling relationship figure.
1 hollow type down-hole hammer, 2 semicircle cards, 3 starters, 4 center slagging channels, 5 spline housings, 6 driving nozzles, 7 diffusion grooves, 8 anti-blocking boss, 9 end spray orifices, 10 sleeve pipes, 11 shoes, 12 ring-shaped sleeve drill bits, 13 drill bit alloys, 14 torsion pass grooves, 15 torsion pass boss, 16 external splines, 17 internal splines, 18 first power transmission steps, 19 second power transmission steps, 20 screw threads.
The specific embodiment:
Be described in further detail below in conjunction with drawings and Examples:
the down-the-hole hammer reverse circulating concentric simultaneous casing drilling tool, to be connected with spline housing by semicircle card 2 by hollow type down-hole hammer 1 to be connected with starter 3, be provided with in the axial direction external splines 16 at starter 3, and match with the internal spline 17 of ring-shaped sleeve drill bit 12, starter 3 is provided with torsion pass groove 14, the hypomere of starter 3 is provided with end spray orifice 9, the lower end of spline housing 5 is provided with driving nozzle 6, the bottom of center slagging channel 4 is provided with diffusion groove 7, the bottom of starter 3 is provided with anti-blocking boss 8, ring-shaped sleeve drill bit 12 is suspended on the lower end of sleeve pipe 10 by shoe 11, drill bit alloy 13 is embedded in the bottom face of ring-shaped sleeve drill bit 12, the upper end of ring-shaped sleeve drill bit 12 is provided with torsion pass boss 15, the hypomere of starter 3 is provided with the first power transmission step 18 and the second power transmission step 19 consists of.Starter 3 is designed to anti-loop structure, the Partial shrinkage air produces negative pressure after spraying by spray orifice at the bottom of starter 9, effect compressed air in pressure differential inwardly flows, portion gas directly sprays in central passage obliquely by the driving nozzle 6 on spline housing 5, both acting in conjunction forms anti-circulation, distinguishes simultaneously the alloy 13 on cooled guide drill bit 3 and ring-shaped sleeve drill bit 12.Compressed air after the anti-circulation of formation is 6 Jet with downward flow directions of the driving nozzle on spline housing 5 again, respectively the alloy 13 on cooled guide drill bit and ring-shaped sleeve drill bit 12.The torque-transmitting mechanisms of casing drilling tool is that the torsion pass boss 15 by the torsion pass groove 14 in starter 3 outsides and ring-shaped sleeve drill bit 12 inboards consists of, the torsion pass groove 14 of starter 3 and the 12 torsion pass boss 15 phase interlocks of ring-shaped sleeve drill bit, transmitting torque when turning clockwise, and both are thrown off when being rotated counterclockwise.Starter 3 is offered external splines 16 in the axial direction, and matches with the internal spline 17 of ring-shaped sleeve drill bit 12, can realize that a whole set of drilling tool promotes with the cover pipe assembly, also can after advance to finish with pipe bit, not change drilling tool and continue to implement reverse circulation drilling.Shoe 11 is that two semicircular ring form, and is connected with sleeve pipe 10 by screw thread.The impact force of down-hole hammer passes to ring-shaped sleeve drill bit 12 by the first power transmission step 18 and the second power transmission step 19, realize impacting detritus, after advancing to finish with pipe bit, with 60 ° of degree of drilling tool turning anticlockwise, starter 3 and ring-shaped sleeve drill bit 12 occlusal positions are broken away from, at the bottom of can making drilling tool lift from the hole by the external splines 16 on starter 3, also can continue downwards to creep into.
Down-the-hole hammer reverse circulating advances drilling tool with pipe bit with one heart, is to be made of reverse circulating drilling tool and cover pipe assembly, and reverse circulating drilling tool is comprised of hollow type down-hole hammer 1 and starter 3, and the cover pipe assembly is comprised of sleeve pipe 10, shoe 11 and ring-shaped sleeve drill bit 12.Hollow type down-hole hammer 1 upper end is connected to rig by drilling rod, is connected with spline housing by semicircle card 2 and is connected with starter 3 in the lower end, and ring-shaped sleeve drill bit 12 hangs on sleeve pipe 10 lower ends and can rotate around the axial line of sleeve pipe by shoe 11.Starter 3 is protruding by the mouth of pipe of ring-shaped sleeve drill bit 12, the bottom of ring-shaped sleeve drill bit 12 is higher than starter 3, make starter 3 sections protrude from ring-shaped sleeve drill bit 12 and realize creeping in advance, between is provided with torsion pass groove 14, starter 3 drives ring-shaped sleeve drill bit 12 revolution detritus, by the first power transmission step and the second power transmission step, the shock loading of down-hole hammer is passed to ring-shaped sleeve drill bit 12, realize that impact rotating follows pipe bit to advance, and sleeve pipe does not turn round.Starter 3 is to form reverse circulating critical component, starter 3 adopts anti-loop structure, compressed air is by the driving nozzle 6 on spray orifice 9 at the bottom of starter and spline housing, the inside drill bit internal of acting in conjunction flows and forms anti-circulation, the gas cutting carring is along returning on anti-circulation canal 4, drain into the earth's surface through hollow type down-hole hammer 1 and double-wall drill pipe, distinguish simultaneously the alloy 13 on cooled guide drill bit and ring-shaped sleeve drill bit 12.Starter 3 has anti-blocking boss 8 the bulk landwaste can be smashed at the landwaste entrance, prevents that the sillar blocking is at anti-circulation canal.Distance 50～100mm between ring-shaped sleeve drill bit 12 and starter 3.
Casing drilling tool adopts anti-endless form deslagging, exhaust system is comprised of two parts: one road air-flow is by end spray orifice 9 Jet with downward flow directions of starter 3, and three place's wedge shape diffusion groove 7 interior generation negative pressuren zones bottom drill bit, at the bottom of the outer czermak space of suction injection drilling tool and hole, the air cutting carring is along returning on central passage 4; Another part gas is by driving nozzle 6 Jet with downward flow directions on spline housing 5, air-flow streams along outside formation of drill bit 3, because the drilling tool central passage is low-pressure area, under the pressure differential effect, carry rock dust and enter central passage 4, produce the high-speed gas jet swelling heat absorption, the ball of cooling ring-type pipe bit meshing golden 13 effectively.The acting in conjunction of two parts gas forms anti-circulation.Also can mill into trench structure to replace driving nozzle in the relevant position on spline housing 5.
Starter 3 axially on offer external splines 16 and match with the internal spline 17 of ring-shaped sleeve drill bit 12, can realize a whole set of drilling tool free lifting in overlapping pipe assembly.Advance to turn clockwise in process with pipe bit and drive pipe bit 12 axially revolution simultaneously.And ring-shaped sleeve drill bit 12 is suspended on sleeve pipe 10 lower ends by shoe 11, and sleeve pipe does not turn round.
Existing casing drilling tool mostly need be carried boring after advancing to finish with pipe bit and change drilling tool, the present invention is after advancing to finish with pipe bit, can not carry brill, not change drilling tool, original inner reverse circulating drilling tool utilizes spline to pass through 12 continuation of ring-shaped sleeve drill bit and implements reverse circulation drilling.
When drilling tool turns clockwise, the torsion pass groove 14 on starter 3 and ring-shaped sleeve drill bit 12 torsion pass boss 15 phase interlock transmitting torques; When being rotated counterclockwise 60 °, the torsion pass groove 14 on starter 3 is thrown off automatically with ring-shaped sleeve drill bit 12 torsion pass boss 15.
The hitch of cover pipe assembly makes ring-shaped sleeve drill bit 12 movable hangings in the sleeve pipe lower end and around the revolution of the direction of axis line of sleeve pipe.Hitch is that annular groove and the screw thread 20 by shoe 11, ring-shaped sleeve drill bit 12 outsides consists of.Shoe 11 is that two semicircular ring form, and coordinate installation with ring-shaped sleeve drill bit 12 after, utilizes the screw thread 20 on shoe 11 to be directly connected on sleeve pipe 10.For guaranteeing the intensity of shoe 11, weld at two semicircular ring binding sites.Hitch can also be designed to the structures such as latch, snap ring.
Claims (5)
1. a down-the-hole hammer reverse circulating advances drilling tool with pipe bit with one heart, to be consisted of by reverse circulating drilling tool and cover pipe assembly, reverse circulating drilling tool is comprised of hollow type down-hole hammer (1) and starter (3), and the cover pipe assembly is comprised of sleeve pipe (10), shoe (11) and ring-shaped sleeve drill bit (12), it is characterized in that, hollow type down-hole hammer (1) is connected 5 by semicircle card (2) with spline housing) be connected with starter (3), be provided with external splines (16) on the axial direction of starter (3), and match with the internal spline (17) of ring-shaped sleeve drill bit (12), starter (3) is provided with torsion pass groove (14), the hypomere of starter (3) is provided with end spray orifice (9), the lower end of spline housing (5) is provided with driving nozzle (6), the bottom of center slagging channel (4) is provided with diffusion groove (7), the bottom of starter (3) is provided with anti-blocking boss (8), ring-shaped sleeve drill bit (12) is suspended on the lower end of sleeve pipe (10) by shoe (11), drill bit alloy (13) is embedded in the bottom face of ring-shaped sleeve drill bit (12), the upper end of ring-shaped sleeve drill bit (12) is provided with torsion pass boss (15), the hypomere of starter (3) is provided with the first power transmission step (18) and the second power transmission step (19),
Starter (3) is designed to anti-loop structure, and the Partial shrinkage air produces negative pressure after spraying by spray orifice (9) at the bottom of starter, and is mobile in the center slagging channel (4) in the effect compressed air of pressure differential; The Partial shrinkage air is by driving nozzle (6) Jet with downward flow direction on spline housing (5), and air-flow enters central row slag passage (4) after the outside formation of starter (3) is streamed; Both acting in conjunction forms anti-circulation, and distinguishes the drill bit alloy (13) on cooled guide drill bit (3) and ring-shaped sleeve drill bit (12) simultaneously.
2. advance drilling tool with pipe bit with one heart by down-the-hole hammer reverse circulating claimed in claim 1, it is characterized in that: the torque-transmitting mechanisms of reverse circulating drilling tool is made of torsion pass groove (14) and the inboard torsion pass boss (15) of ring-shaped sleeve drill bit (12) in starter (3) outside, the torsion pass groove (14) of starter (3) and ring-shaped sleeve drill bit (12) torsion pass boss (15) phase interlock, but transmitting torque when turning clockwise, and both are thrown off when being rotated counterclockwise.
3. advance drilling tool with pipe bit with one heart by down-the-hole hammer reverse circulating claimed in claim 1, it is characterized in that: starter (3) is offered external splines (16) in the axial direction, and match with the internal spline (17) of ring-shaped sleeve drill bit (12), can realize that reverse circulating drilling tool promotes in the cover pipe assembly, can after advance to finish with pipe bit, not change reverse circulating drilling tool and continue to implement reverse circulation drilling yet.
4. advance drilling tool with pipe bit with one heart by down-the-hole hammer reverse circulating claimed in claim 1, it is characterized in that: shoe (11) is comprised of two semicircular ring, and is connected with sleeve pipe (10) by screw thread.
5. advance drilling tool with pipe bit with one heart by down-the-hole hammer reverse circulating claimed in claim 1, it is characterized in that: the impact force of down-hole hammer passes to ring-shaped sleeve drill bit (12) by the first power transmission step (18) and the second power transmission step (19), realize impacting detritus, after advancing to finish with pipe bit, with 60 ° of degree of reverse circulating drilling tool turning anticlockwise, starter (3) and ring-shaped sleeve drill bit (12) occlusal position are broken away from, at the bottom of can making reverse circulating drilling tool lift from the hole by the external splines (16) on starter (3), also can continue downwards to creep into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201010275030 CN101956525B (en) | 2010-09-08 | 2010-09-08 | Down-the-hole hammer reverse concentric casing drilling tool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010275030 CN101956525B (en) | 2010-09-08 | 2010-09-08 | Down-the-hole hammer reverse concentric casing drilling tool |
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| CN101956525A CN101956525A (en) | 2011-01-26 |
| CN101956525B true CN101956525B (en) | 2013-05-08 |
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| CN 201010275030 Expired - Fee Related CN101956525B (en) | 2010-09-08 | 2010-09-08 | Down-the-hole hammer reverse concentric casing drilling tool |
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| CN103015408A (en) * | 2012-12-20 | 2013-04-03 | 山东万鑫建设有限公司 | Cast-in-place pile synchronous casing hole-forming constructing method |
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| CN113062693B (en) * | 2021-04-14 | 2022-07-29 | 太原理工大学 | Device and method for extracting gas by drilling complicated stratum through pipe-following protective hole |
| CN114251053B (en) * | 2021-12-14 | 2023-09-26 | 中国地质科学院勘探技术研究所 | Drill bit for casing drilling |
| CN114382410A (en) * | 2022-01-12 | 2022-04-22 | 焦作煤业（集团）新乡能源有限公司 | Downhole broken stratum hole bottom driving rapid pipe following drilling tool and method for coal mine |
| CN115788280B (en) * | 2022-11-18 | 2023-09-26 | 浩洲钻科工程机械(山东)有限公司 | Independent multi-channel full-hole reverse circulation bundling type down-the-hole hammer |
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