CN101956525A - 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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- CN101956525A CN101956525A CN 201010275030 CN201010275030A CN101956525A CN 101956525 A CN101956525 A CN 101956525A CN 201010275030 CN201010275030 CN 201010275030 CN 201010275030 A CN201010275030 A CN 201010275030A CN 101956525 A CN101956525 A CN 101956525A
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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 that bad ground is drilled that are used for, particularly the anti-circulation of down-the-hole hammer is advanced with pipe bit.
Background technology:
Down-the-hole hammer advances technology with pipe bit and is at fragmentation, leakage, ovum gravel, misses the efficient drilling method of troublesome zone drilling pore-formings such as caving in.It utilizes down-the-hole to hammer efficient detritus into shape, utilize and to follow synchronously 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 casing drilling tool and concentric simultaneous casing drilling tool two big classes.Facts have proved that existing down-the-hole hammers eccentric casing drilling tool into shape and have certain defective, for example: the boring required torque is big, and the boring concentricity is poor, and eccentric pendulum is big, and bit freezing easily takes place, and is big and cause sleeve pipe to destroy easily with the pipe resistance.
At present, common down-the-hole hammer concentric simultaneous casing drilling tool mainly adopts the direct circulation deslagging.Drill bit drove outer drill bit rotary drilling in representative products utilized as the Symmetrix casing drilling tool of: Finland, 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 off-centre or three off-centre, and when turning round clockwise, the drill bit flap valve opens, and reaches the purpose that bore diameter surpasses the cover external diameter of pipe.What U.S.'s NUMA casing drilling tool was most characteristic is, casing drilling tool is made up of bit body, drill bit ala and backing pin, and drill bit reducing principle is to utilize the drill bit ala to move down in the axial direction to change bit diameter.Above drilling system all adopts direct circulation deslagging mode, when the aperture big 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 obtaining the rock sample ore, be difficult to obtain the required rock sample of mineral exploration; Drilling tool structure complexity, cost height, flap valve is easily stuck by landwaste when carrying brill, gives and proposes the next inconvenience of drilling.CN1651711A discloses a kind of bottom hole hammer reverse circulation follow pipe drill, utilizes two flap valve structures to change bore diameter, realizes that the concentric pipe bit of following of anti-circulation advances, but the drill bit structure complexity, the processing cost height.Thereby, be necessary to design and a kind of anti-circulation concentric simultaneous casing drilling tool hammered into shape in aperture and the strong down-the-hole of stratum adaptive capacity, and claimed structure is simple, reliable and stable.
Summary of the invention:
Purpose of the present invention is exactly at above-mentioned the deficiencies in the prior art, provides a kind of concentric pipe bit of following of the anti-circulation of antisubmarine drift of different bores that is applicable to advance drilling tool.
The objective of the invention is to be achieved through the following technical solutions:
Down-the-hole is hammered anti-circulation concentric simultaneous casing drilling tool into shape, be to be connected with starter 3 with spline housing 5 by semicircle card 2 by hollow type down-the-hole hammer 1, be provided with external splines 16 in the axial direction 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, and the hypomere of starter 3 is provided with the first power transmission step 18 and the second power transmission step 19 constitutes.
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 constitutes, the torsion pass groove 14 of described starter 3 and 12 torsion pass boss 15 interlocks mutually of ring-shaped sleeve drill bit, but transfer torque when turning clockwise, and both are thrown off when being rotated counterclockwise.
The impact force of down-the-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 following pipe bit to advance to finish, 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 on the starter 3 16, also can continue downwards to creep into.
Beneficial effect: the present invention compares with existing like product, can be under the impact loading that the down-the-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 to avoid hole wall to wash away and the flushing liquor leakage effectively, two gas circuit structures can cool off the meshing gold of ball of inside and outside drill bit simultaneously, improve 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 the lancing door, can guarantee that under different apertures lancing door bed rock bits avoid the repetition fragmentation to improve drilling efficiency effectively.Carry when boring difficult stuck by landwaste.After following pipe bit to advance to finish, 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, drilling efficiency height.
Description of drawings:
Fig. 1 is the structure chart that down-the-hole is hammered anti-circulation concentric simultaneous casing drilling tool into shape
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 the anti-concentric simultaneous casing drilling tool assembling relationship figure that circulates.
1 hollow type down-the-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:
Down-the-hole is hammered anti-circulation concentric simultaneous casing drilling tool into shape, be to be connected with starter 3 with spline housing 5 by semicircle card 2 by hollow type down-the-hole hammer 1, be provided with external splines 16 in the axial direction 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, and the hypomere of starter 3 is provided with the first power transmission step 18 and the second power transmission step 19 constitutes.Starter 3 is designed to anti-loop structure, part compressed air sprays the back by spray orifice at the bottom of the starter 9 and produces negative pressure, inwardly flow in the action of pressure compressed air, portion gas directly sprays in central passage obliquely by the driving nozzle 6 on the spline housing 5, the two acting in conjunction forms anti-circulation, distinguishes the alloy 13 on cooled guide drill bit 3 and the ring-shaped sleeve drill bit 12 simultaneously.Compressed air after the anti-circulation of the formation driving nozzle on spline housing 56 again sprays downwards, respectively the alloy 13 on cooled guide drill bit and the 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 constitutes, the torsion pass groove 14 of starter 3 and 12 torsion pass boss 15 interlocks mutually of ring-shaped sleeve drill bit, transfer 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 not change drilling tool and continue to implement reverse circulation drilling after advance to finish with pipe bit.Shoe 11 is that two semicircular ring are formed, and is connected with sleeve pipe 10 by screw thread.The impact force of down-the-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 following pipe bit to advance to finish, 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 on the starter 3 16, also can continue downwards to creep into.
The anti-circulation of down-the-hole hammer is advanced 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 made up of hollow type down-the-hole hammer 1 and starter 3, and the cover pipe assembly is made up of sleeve pipe 10, shoe 11 and ring-shaped sleeve drill bit 12.The hollow type down-the-hole is hammered 1 upper end into shape and is connected to rig by drilling rod, and the lower end then is connected with starter 3 with spline housing 5 by semicircle card 2, and ring-shaped sleeve drill bit 12 hangs on sleeve pipe 10 lower ends by shoe 11 and can rotate around the axial line of sleeve pipe.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, making starter 3 sections protrude from ring-shaped sleeve drill bit 12 also realizes creeping in advance, between is provided with torsion pass groove 14, starter 3 drives ring-shaped sleeve drill bit 12 revolution detritus, the shock loading of down-the-hole being hammered into shape by the first power transmission step and the second power transmission step passes to ring-shaped sleeve drill bit 12, realize that impact rotating advances with pipe bit, 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 the starter and the spline housing, the inside drill bit internal of acting in conjunction flows and forms anti-circulation, the gas-entrained landwaste is along returning on the anti-circulation canal 4, drain into the face of land through hollow type down-the-hole hammer 1 and double-wall drill pipe, distinguish the alloy 13 on cooled guide drill bit and the ring-shaped sleeve drill bit 12 simultaneously.Starter 3 has anti-blocking boss 8 the bulk landwaste can be smashed at the landwaste inlet, prevents that the sillar card from getting lodged in anti-circulation canal.Distance 50～100mm between ring-shaped sleeve drill bit 12 and the starter 3.
Casing drilling tool adopts anti-endless form deslagging, exhaust system is made up of two parts: the end spray orifice 9 that one tunnel air communication is crossed starter 3 sprays downwards, and in three place's wedge shape diffusion grooves 7 of drill bit bottom, producing negative pressuren zone, the air cutting carring is along returning on the central passage 4 at the bottom of outer czermak space of suction injection drilling tool and the hole; Another part gas sprays downwards by the driving nozzle 6 on the spline housing 5, air-flow streams along drill bit 3 outside formation, because the drilling tool central passage is a 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, can cool off the ball meshing golden 13 of ring-type pipe bit effectively.The acting in conjunction of two parts gas forms anti-circulation.Also can mill into trench structure in the relevant position on the spline housing 5 to replace driving nozzle.
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 the 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 need be carried mostly 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 turned clockwise, the torsion pass groove 14 on the starter 3 and ring-shaped sleeve drill bit 12 torsion pass boss 15 are the interlock transfer torque mutually; When being rotated counterclockwise 60 °, the torsion pass groove 14 on the starter 3 is thrown off automatically with ring-shaped sleeve drill bit 12 torsion pass boss 15.
The hitch of cover pipe assembly makes 12 activities of ring-shaped sleeve drill bit be suspended on the sleeve pipe lower end and centers on the direction of axis line revolution of sleeve pipe.Hitch is that annular groove and the screw thread 20 by shoe 11, ring-shaped sleeve drill bit 12 outsides constitutes.Shoe 11 is that two semicircular ring are formed, cooperates installation with ring-shaped sleeve drill bit 12 after, utilize the screw thread 20 on the shoe 11 to be directly connected on the sleeve pipe 10.For guaranteeing the intensity of shoe 11, weld at two semicircular ring binding sites.Hitch can also be designed to structures such as latch, snap ring.
Claims (6)
1. the anti-circulation of down-the-hole hammer is advanced drilling tool with pipe bit with one heart, it is characterized in that, be to be connected with starter (3) with spline housing (5) by semicircle card (2) by hollow type down-the-hole hammer (1), on the axial direction of starter (3), be provided with external splines (16), 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), and the hypomere of starter (3) is provided with the first power transmission step (18) and the second power transmission step (19) constitutes.
2. advance drilling tool with pipe bit with one heart by the anti-circulation of the described down-the-hole hammer of claim 1, it is characterized in that: starter (3) is designed to anti-loop structure, part compressed air sprays the back by spray orifice (9) at the bottom of the starter and produces negative pressure, inwardly flow in the action of pressure compressed air, portion gas directly sprays in central passage obliquely by the driving nozzle (6) on the spline housing (5), the two acting in conjunction forms anti-circulation, distinguishes the alloy (13) on cooled guide drill bit (3) and the ring-shaped sleeve drill bit (12) simultaneously.
3. advance drilling tool with pipe bit with one heart by the anti-circulation of the described down-the-hole hammer of claim 1, it is characterized in that: the torque-transmitting mechanisms of casing drilling tool is made of the 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) interlock mutually, but transfer torque when turning clockwise, and both are thrown off when being rotated counterclockwise.
4. advance drilling tool with pipe bit with one heart by the anti-circulation of the described down-the-hole hammer of 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 a whole set of drilling tool promotes with the cover pipe assembly, can after advance to finish, not change drilling tool and continue to implement reverse circulation drilling with pipe bit yet.
5. advance drilling tool with pipe bit with one heart by the anti-circulation of the described down-the-hole hammer of claim 1, it is characterized in that: shoe (11) is made up of two semicircular ring, and is connected with sleeve pipe (10) by screw thread.
6. advance drilling tool with pipe bit with one heart by the anti-circulation of the described down-the-hole hammer of claim 1, it is characterized in that: the impact force of down-the-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 following pipe bit to advance to finish, with 60 ° of degree of 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 drilling tool lift from the hole by the external splines (16) on the starter (3), also can continue downwards to creep into.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN 201010275030 CN101956525B (en) | 2010-09-08 | 2010-09-08 | Down-the-hole hammer reverse concentric casing drilling tool |
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| CN101956525A true CN101956525A (en) | 2011-01-26 |
| CN101956525B 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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| WO2012106999A1 (en) * | 2011-02-11 | 2012-08-16 | Chan Leung Choi | Annulus ring hole drill |
| CN102926663A (en) * | 2011-11-10 | 2013-02-13 | 广汉市井管厂 | Concentric sliding block simultaneous casing drilling tool, center drilling bit and centralizer |
| CN102966304A (en) * | 2012-11-28 | 2013-03-13 | 吉林大学 | Mud retaining wall and air down-the-hole hammer drilling tool and drilling technology |
| 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 |
| CN103114812A (en) * | 2013-03-05 | 2013-05-22 | 山东托普森金刚石钻头有限公司 | Diamond compact annular concentric simultaneous casing drilling bit and working method thereof |
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