CN204283209U - Air latent drift single-action twin-pipes is cored casing drilling tool - Google Patents
Air latent drift single-action twin-pipes is cored casing drilling tool Download PDFInfo
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- CN204283209U CN204283209U CN201420620816.XU CN201420620816U CN204283209U CN 204283209 U CN204283209 U CN 204283209U CN 201420620816 U CN201420620816 U CN 201420620816U CN 204283209 U CN204283209 U CN 204283209U
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Abstract
The utility model relates to a kind of air latent drift single-action twin-pipes to core casing drilling tool, is a kind of for being suitable for loosen loose sand boulder and cobble and the broken air latent drift single-action twin-pipes of the association area such as bad ground engineering geologic investigation and geological and mineral exploration that waits of fracture is cored casing drilling tool.Be made up of center core drill and casing drilling tool; Center core drill is single-action twin-pipes core drill, by single action damper mechanism, interior pipe governor motion, forms containing the mechanism that cores of card center device; Single action damper mechanism comprises impact joint, disk spring, bearing support, connecting axle, thrust ball bearing and radial ball bearing; Interior pipe governor motion comprises connecting axle, core barrel head, interior pipe and nut; The mechanism that cores containing card center device comprises outer tube, interior pipe, connecting axle, core barrel head, core bit, needle roller, pawl spring seat and pawl spring; Casing drilling tool is made up of sleeve pipe and casing joint, casing shoe, snap ring, pipe bit.
Description
Technical field
The utility model relates to a kind of air latent drift single-action twin-pipes to core casing drilling tool, is a kind of for being suitable for loosen loose sand boulder and cobble and the broken air latent drift single-action twin-pipes of the association area such as bad ground engineering geologic investigation and geological and mineral exploration that waits of fracture is cored casing drilling tool.
Technical background
Loosen loose sand boulder and cobble and fracture fragmentation wait bad ground to get core (or sampling) and creep into, and be a drilling field difficult problem, it is characterized in that boring is easily caved in, sampling rate is low, drilling efficiency is low always.Explored by research and practice, drilling technique has had progress greatly, retaining wall effect, quality of coring and core recovery percentage are significantly improved, but for loosen loose sand boulder and cobble with fracture is broken waits bad ground but formation collapse problem still affects drilling efficiency, quality of coring still can not meet the demands, the direct accurate evaluation affecting stratum and ore bed, even causes boring to be scrapped.Natural gas hydrate deep-water shallow-hole pressure-retaining and heat-insulatnig core drilling outfits disclosed in Chinese invention patent application number 02135935.0, still has exposed hole section, can cave in; Controlled shunting core drill disclosed in three-in-one combined core drilling outfits and Chinese utility model patent 89220229.7 disclosed in Chinese invention patent application 200410080343.X, owing to adopting liquid irrigation fluids, it is movable that ripple sent out sliding by easy line; Also have the down-hole hammer casing drilling tool of some other advanced persons, rock breaking efficiency is good, and drilling efficiency is high, but does not possess function of coring.There is impact rotating mode fractured rock, drilling efficiency is high, and have Chinese invention patent application number 200510021979.1 air DTH hammer drilling equipment for core and follow-down drilling with boring casing drilling retaining wall effect, what adopt is the core drill of double movable double-tube structure, hamper the raising of core quality and taking rate, the through-hole diameter that pipe bit is connected with core bit is little, and concavo-convex fit clearance of core bit and pipe bit is little, and core bit passes pipe bit and is inconvenient to affect drilling efficiency.Therefore the task of top priority is developed the air latent drift being applicable to the bad grounds such as loosen loose sand boulder and cobble and is got core casing drilling tool, and reach quality of coring good, drilling efficiency is high, and boring is not collapsed and can not induced landslide activity.
Summary of the invention
The utility model object provides a kind of air latent drift single-action twin-pipes to core casing drilling tool for above-mentioned weak point, it is a kind of air DTH hammer drilling equipment for core and follow-down drilling for bad ground geological drillings such as loosen loose sand boulder and cobble and fractured zones, water sensitivity, leakages, this drilling tool can with air impact rotating mode kata-rocks, with brill synchronous follow-up sleeve pipe retaining wall, can core and improve core sampler quality simultaneously, realize air latent drift to core pipe-following drilling, its boring do not collapse and can not induced landslide movable, gather that core quality is good, drilling efficiency is high.
The utility model air latent drift single-action twin-pipes casing drilling tool of coring takes following technical scheme to realize:
Air latent drift single-action twin-pipes casing drilling tool of coring is made up of center core drill and casing drilling tool.Center core drill is single-action twin-pipes core drill, by single action damper mechanism, interior pipe governor motion, forms containing the mechanism that cores of card center device;
The utility model single action damper mechanism mainly realizes the effect of single action vibration damping, and single action damper mechanism comprises impact joint, disk spring, bearing support, connecting axle, thrust ball bearing and radial ball bearing.Outer tube is connected with impact joint by screw thread, interior pipe is connected with core barrel head, core barrel head is connected with connecting axle, connecting axle is connected with impact joint with radial ball bearing by thrust ball bearing, realizing impacting joint drives outer tube and core bit to rotate, and connecting axle and core barrel head and interior pipe do not rotate; Impacting joint lower end and arranging one group of disk spring between thrust ball bearing, radial ball bearing and connecting axle, play damping effect.
In the utility model, pipe governor motion mainly regulates the gap between the pawl spring seat of interior pipe lower end socket card center device and core bit.Comprise connecting axle, core barrel head, interior pipe, nut.Nut and connecting axle are threaded connection, and connecting axle and core barrel head are threaded connection, and core barrel head and interior pipe are threaded connection; Connecting axle controls by turning rotating nut the gap that core barrel head to be threaded with connecting axle between the pawl spring seat of length adjustment card center device and core bit, guarantees that the gap between pawl spring seat and core bit is applicable to.
The utility model comprises outer tube, interior pipe (can add the pipe that narrows therein as required), connecting axle, core barrel head, core bit, needle roller, pawl spring seat and pawl spring containing the mechanism that cores of card center device.Pawl spring seat and pawl spring composition card center device, in pawl spring seat, gradient and outer gradient of pawl spring coordinate and can slippage mutually; Pawl spring seat upper end and interior pipe lower end optical axis portion are socketed and slip; Be provided with needle roller between pawl spring seat and coring bit, play drag reduction and correcting effect, pawl spring has reversed acanthoid elasticity handgrip, when creeping into, the upwards slippage of card center device, rock core enters interior pipe through core bit and pawl spring, drill bit internal diameter than interior pipe and pawl spring internal diameter little, rock core can freely enter; When carrying brill, the downward slippage of card center device, elasticity handgrip shrinks card and gets and keep off coring, and rock core can not come off, and improves quality of coring.Heavy wall compo pipe selected by core drill outer tube, and after heat treatment hardness is in HRC32 ~ 36, guarantees the transmission of ballistic work.Outer tube and coring bit, outer tube and impact joint connections threads adopt corrugated thread, this threaded function stress dispersion, connect reliable, load and unload more convenient, long service life.
The utility model casing drilling tool is made up of sleeve pipe, casing joint, casing shoe, snap ring, pipe bit, for concentric reaming casing drilling tool, sleeve pipe is by casing joint and casing shoe screwed connection, the connection of pipe bit and casing shoe adopts snap ring, snap ring is opening annulus, effective through experiment power transmission, do not occur damaging phenomenon; Pipe bit and casing shoe adopt snap ring to be connected to form the suspended structure can rotated around the axial line of sleeve pipe, pipe bit can rotate around casing shoe, snap ring transmits sleeve pipe axial force, and wherein pipe bit is rotatable, and sleeve pipe, casing joint, casing shoe etc. do not rotate; Snap ring wall thickness equals casing shoe annular groove depth, snap ring internal diameter equals pipe bit cannelure path, pipe bit annular groove depth is less than snap ring wall thickness, first snap ring is loaded in casing shoe during assembling, then pipe bit is compressed into, install rear sleeve drill bit and casing shoe can freely rotate; Pipe bit drives casing shoe sleeve pipe synchronously to follow up by snap ring.
Center core drill and casing drilling tool realize pressure by pressure transmission and torque transmission mechanism and moment of torsion reaches drill bit fractured rock and synchronous follow-up; The gas channel system of drilling tool is made up of high-pressure channel loop and low-pressure channel loop.
The utility model is in pipe bit, core bit design, and core bit exceeds pipe bit to overhanging, and pipe bit bottom is 90mm higher than core bit.Core bit bottom welding-on three groups of ball post alloy 25,6, outer ring ball post alloy, centre circle 2 ball post alloy, inner ring 1 ball post alloy; Pipe bit welding-on has three layers of ball post alloy, 9, outer ring ball post alloy, centre circle 6 ball post alloy, inner ring 3 ball post alloy.Formula structure that core bit is taked in advance (pipe bit and high pressure outlet air hole), its fragmentation (rock) labial surface advanced high pressure outlet air hole L can make pressure-air directly get rid of from high pressure outlet air hole L, ensureing fully to wash away at the bottom of landwaste Purge holes and under the prerequisite of cooling drill bit, eliminating pressure-air and directly wash away the unfavorable factor that Bit face rings core sampler quality.Reaming aperture is 10mm more than larger than sleeve outer generally, to reduce the frictional resistance of hole wall to sleeve pipe 11.Drill bit minimum cross section size can not be less than 6mm, ensures the linking intensity of force transmission mechanism, and under large impact energy, drill bit can not be out of shape or cracked.Drill bit material select have 45CrNiMoVA, XG25,42CrMo etc., after integral quenching tempering, hardness about HRC40 ~ 44, guaranteed strength, toughness.Permanent tooth quality can be ensured again.Drill bit generally adopts interference to cold pressing or hot pressing craft of consolidating teeth, ensures that steel physical efficiency lives carbide alloy effectively admittedly, and makes heel teeth be bumped into rear drill bit to have certain sword of going out, and simultaneously in order to reduce alloy shearing force, it is 35 ° that more solito gets incline angle of side teeth.YG8c or YJ2H hemisphere tooth selected by drill bit carbide alloy, ensures higher hardness and good toughness.Before inserted, according to magnitude of interference grinding alloy.
The transmission of the utility model pressure and torque transmission mechanism comprise core bit and pipe bit.Mainly realize pressure and moment of torsion to reach drill bit fractured rock and synchronously follow up.During drilling tool work, pressure and moment of torsion through impacting joint, outer tube is delivered to core bit and pipe bit, realize drill bit synchronously broken rock creep into; Core bit and pipe bit have pressure to transmit step respectively, and pressure transmits step by core bit and pipe bit pressure to contact transmission; In torque transmission mechanism, three boss are designed with in pipe bit, core bit is designed with three sludge grooves, excircle upwards has three not penetrating grooves, its width is slightly larger than the width of three boss, rear three boss of drilling tool revolution enter in three not penetrating grooves, and make pipe bit and core bit contacts side surfaces be attached to one, transmitting torque turns round jointly.After reversion, boss produces not penetrating groove, is arranged in sludge groove, and in lift, during drilling tool, core bit pulls out from pipe bit.
The utility model drilling tool gas channel system comprises high-pressure channel and low-pressure channel.Major function guides at the bottom of hole by pressure-air, washes away cooling to hole subdrilling head, bed rock bits in hole is carried to ground simultaneously, plays purification drilling action; Low-pressure channel is the return air channel of basket, when rock core is with when drilling into basket, by inner air tube and water (underground water) from return air channel top toward one way valve and connecting axle 4 to the first annular gap, converge with high-pressure channel gas, avoid managing interior air water mineralization pressure, rock core of eliminating the effects of the act enters the factor in pipe.High-pressure channel loop forms slant height on the first annular gap M, core bit by drilling rod, impactor, impact joint axis centre bore H, interior pipe and outer tube and extrudes gas port L and outer tube and sleeve pipe and form the second annular gap N and form; Low-pressure channel loop forms the first annular gap M by interior pipe, one way valve, connecting axle centre bore and interior pipe and outer tube and forms.In drilling process, gases at high pressure flow to impact joint axis centre bore H through drilling rod, impactors, flow to again and form the first annular gap M by interior pipe and outer tube, on core bit, slant height extrudes gas port L outflow again, cooling is washed away to hole subdrilling head, carries rock dust bits and flow to and form the second annular gap N by outer tube and sleeve pipe and discharge ground; Low-pressure gas in interior pipe injects the first annular gap M via valve seat and ball check valve and connecting axle central through hole passage.
Be combined as down-hole hammer (separately joining), core drill and casing drilling tool that the utility model creeps into conventional drilling tool form.As required at drilling rod intermediate configurations centralizer, impactor upper end adjunction sediment tube etc. when creeping into.Need when reclaiming, to select quality material to produce with pipe-in-pipe with pipe-in-pipe.When not needing to reclaim, light-wall pipe or the cheaper tubing of material can be selected.Casing threads is contrary with drill rod thread rotation direction, the optional special trapezoidal thread of form of thread or circular arc type screw thread.The rising of sleeve pipe is pulled out can with hydraulic tube drawing bench or vibrator vibration pipe-drawing, and vertical shallow bore hole also can strike back pipe with sash weight.
Core pipe-following drilling principle got by the utility model drilling tool: when creeping into, creep into axial power from impacting with core drill upper end high-frequency percussion power that down-hole hammer that joint is connected produces and applying from ground drill and passed to the drilling pressure of drilling tool by drilling rod and down-hole hammer, the sleeve pipe resistance automatic regulation moving power according to strata condition and follow-up is distributed core bit and by pressure transmission boss, axial power is passed to pipe bit.During drilling rod revolution, directly drive core drill (comprising core bit) to turn round by down-hole hammer, by torque transmission mechanism, rotary torque is passed to pipe bit, core bit and pipe bit carry out rotary-percussive drilling simultaneously simultaneously.Wherein core bit carries out impact rotating core drill and enters, and rock core directly enters basket with brill, and pipe bit carries out rotary-percussive drilling, and drives sleeve pipe to extend at the bottom of hole with brill, and with under the effect of pipe hitch, sleeve pipe does not turn round; Creep into round trip when terminating to carry brill, the direct referred earth's surface of core drill, casing drilling tool is then trapped in hole, after gathering rock core, then by arriving at the bottom of hole under drilling tool, by artificial positioning action, core drill is put in place, namely core drill is connected again with casing drilling tool, again carries out impact rotating and gets core pipe-following drilling, thus realizes air latent drift and get core pipe-following drilling.
The utility model air latent drift single-action twin-pipes is cored casing drilling tool advantage:
1, multiple functional, rational in infrastructure, not easily contribute bad, dismoutability is good, and component materials compatibility is good;
2, each parts connect firm, rotate flexibly, transmission of pressure and moment of torsion effective;
3, carry brill and lower brill flexible, easy to operate;
4, drill bit rock-breaking efficiency is high, and clear hole is effective, and rate of penetration is fast;
5, drill bit advanced high pressure pore and two-tube single action vibration damping reduce the destruction to rock core, and gap adjustment and pawl spring formula card center device contribute to keeping off coring, and reduce rock core and come off, core sampler quality is good, and taking rate is high.
Accompanying drawing explanation
Get core casing drilling tool below in conjunction with accompanying drawing to the utility model air latent drift single-action twin-pipes to be described further:
Fig. 1 is that air latent drift single-action twin-pipes gets core casing drilling tool schematic diagram.
Fig. 2 is that air latent drift single-action twin-pipes is cored the single action damper mechanism structure enlarged diagram of casing drilling tool.
Fig. 3 is that air latent drift single-action twin-pipes is cored the interior pipe governor motion structure enlarged diagram of casing drilling tool.
Fig. 4 is that air latent drift single-action twin-pipes is cored the drill bit of casing drilling tool and torque transmission mechanism structure amplification view.
Fig. 5 is that air latent drift single-action twin-pipes is cored the drill bit of casing drilling tool and the A-A sectional view of torque transmission mechanism structure amplification view.
Fig. 6 is that air latent drift single-action twin-pipes is cored the core drill card center device structure enlarged diagram of casing drilling tool.
Fig. 7 is that air latent drift single-action twin-pipes is cored the core bit structure enlarged diagram of casing drilling tool.
Fig. 8 is that air latent drift single-action twin-pipes is cored the core bit structure right view of casing drilling tool.
Fig. 9 is that air latent drift single-action twin-pipes is cored the pipe bit structure enlarged diagram of casing drilling tool.
Figure 10 is that air latent drift single-action twin-pipes is cored the pipe bit structure structure right view of casing drilling tool.
In figure: 1, impact joint, 2, disk spring, 3, bearing support, 4, connecting axle, 5, core barrel head, 6, outer tube, 7, interior pipe, 8, pawl spring seat, 9, pawl spring, 10, needle roller, 11, sleeve pipe, 12, casing shoe, 13, snap ring, 14, pipe bit, 15, core bit, 16, valve seat, 17, steel ball, 18, nut, 19, hexagon-headed bolt, 20, the sealing of O type, 21, thrust ball bearing, 22, radial ball bearing, 23, floor clip, 24, round nut, 25, ball post alloy, 26, pressure transmits step, and 27, sludge groove.
Detailed description of the invention
With reference to accompanying drawing 1 ~ 10, air latent drift single-action twin-pipes casing drilling tool of coring is made up of center core drill and casing drilling tool.Center core drill is single-action twin-pipes core drill, by single action damper mechanism, interior pipe governor motion, forms containing the mechanism that cores of card center device;
The utility model single action damper mechanism mainly realizes the effect of single action vibration damping, and single action damper mechanism comprises impact joint 1, disk spring 2, bearing support 3, connecting axle 4, thrust ball bearing 21, radial ball bearing 22.Outer tube 6 is connected with impact joint 1 by screw thread, interior pipe 7 is connected with core barrel head 5, core barrel head 5 is connected with connecting axle 4, connecting axle 4 is connected with impact joint 1 with radial ball bearing 22 by thrust ball bearing 21, realizing impacting joint 1 drives outer tube 6 and core bit 15 to rotate, and connecting axle 4 and core barrel head 5 and interior pipe 7 do not rotate; Impacting joint 1 lower end and arranging one group of disk spring 2 between thrust ball bearing 21, radial ball bearing 22 and connecting axle 4, play damping effect.
In the utility model, pipe governor motion mainly regulates the gap between the pawl spring seat 8 of interior pipe 7 lower end socket card center device and core bit 15.Comprise connecting axle 4, core barrel head 5, interior pipe 7, nut 18.Nut 18 and connecting axle 4 are threaded connection, and connecting axle 4 and core barrel head 5 are threaded connection, and core barrel head 5 and interior pipe 7 are threaded connection; Controlling by turning rotating nut 18 gap that core barrel head 5 to be threaded with connecting axle 4 between the pawl spring seat 8 of length adjustment card center device and core bit 15, guaranteeing that the gap between pawl spring seat 8 and core bit 15 is applicable to.
The utility model containing card center device the mechanism that cores comprises outer tube 6, interior pipe 7(can add the pipe that narrows as required therein), connecting axle 4, core barrel head 5, core bit 15, needle roller 10, pawl spring seat 8 and pawl spring 9.Pawl spring seat 8 and pawl spring 9 form card center device, and in pawl spring seat 8, outer gradient of gradient and pawl spring 9 coordinate and can slippage mutually; Pawl spring seat 8 upper end and interior pipe 7 lower end optical axis portion are socketed and slip; Needle roller 10 is provided with between pawl spring seat 8 and coring bit 15, play drag reduction and correcting effect, pawl spring 9 has reversed acanthoid elasticity handgrip, when creeping into, the upwards slippage of card center device, rock core enters interior pipe 7 through core bit 15 and pawl spring 9, core bit 15 internal diameter than interior pipe 7 and pawl spring 9 internal diameter little, rock core can freely enter; When carrying brill, the downward slippage of card center device, elasticity handgrip shrinks card and gets and keep off coring, and rock core can not come off, and improves quality of coring.Heavy wall compo pipe selected by core drill outer tube 6, and after heat treatment hardness is in HRC32 ~ 36, guarantees the transmission of ballistic work.Outer tube 6 adopts corrugated thread, this threaded function stress dispersion with coring bit 15, outer tube 6 with impact joint 1 connecting thread, connects reliable, loads and unloads more convenient, long service life.
The utility model casing drilling tool is made up of sleeve pipe 11, casing joint, casing shoe 12, snap ring 13, pipe bit 14, for concentric reaming casing drilling tool, sleeve pipe 11 is by casing joint and casing shoe 12 screwed connection, pipe bit 14 adopts snap ring with the connection of casing shoe 12, snap ring is opening annulus, effective through experiment power transmission, do not occur damaging phenomenon; Pipe bit 14 and casing shoe 12 adopt snap ring 13 to be connected to form the suspended structure can rotated around the axial line of sleeve pipe 11, pipe bit 14 can rotate around casing shoe, snap ring transmits sleeve pipe axial force, wherein pipe bit 14 is rotatable, and sleeve pipe 11, casing joint, casing shoe 12 etc. do not rotate; Snap ring 13 wall thickness equals casing shoe 12 annular groove depth, snap ring 13 internal diameter equals pipe bit 14 cannelure path, pipe bit 14 annular groove depth is less than snap ring 13 wall thickness, first snap ring 13 is loaded in casing shoe 12 during assembling, then pipe bit 14 is compressed into, install rear sleeve drill bit 14 and can freely rotate with casing shoe 12; Pipe bit 14 drives casing shoe 12 by snap ring 13, sleeve pipe 11 synchronously follows up.
Center core drill and casing drilling tool realize pressure by pressure transmission and torque transmission mechanism and moment of torsion reaches drill bit fractured rock and synchronous follow-up; The gas channel system of drilling tool is made up of high-pressure channel loop and low-pressure channel loop.
The utility model is in pipe bit 14, core bit 15 design, and core bit 15 exceeds pipe bit 14 to overhanging, and pipe bit 14 bottom is 90mm higher than core bit 15.Core bit 15 bottom welding-on three groups of ball post alloy 25,6, outer ring alloy, centre circle 2 ball post alloy, inner ring 1 ball post alloy; Pipe bit 14 welding-on has three layers of ball post alloy 25,9, outer ring ball post alloy, centre circle 6 ball post alloy, inner ring 3 ball post alloy.(pipe bit and high pressure outlet air hole) formula structure taked in advance by core bit 15, its fragmentation (rock) labial surface advanced high pressure outlet air hole L can make pressure-air directly get rid of from high pressure outlet air hole L, ensureing fully to wash away at the bottom of landwaste Purge holes and under the prerequisite of cooling drill bit, eliminating pressure-air and directly wash away the unfavorable factor that Bit face rings core sampler quality.Reaming aperture is 10mm more than larger than sleeve outer generally, to reduce the frictional resistance of hole wall to sleeve pipe 11.Drill bit minimum cross section size can not be less than 6mm, ensures the linking intensity of force transmission mechanism, and under large impact energy, drill bit can not be out of shape or cracked.Drill bit material select have 45CrNiMoVA, XG25,42CrMo etc., after integral quenching tempering, hardness about HRC40 ~ 44, guaranteed strength, toughness.Permanent tooth quality can be ensured again.Drill bit generally adopts interference to cold pressing or hot pressing craft of consolidating teeth, ensures that steel physical efficiency lives carbide alloy effectively admittedly, and makes heel teeth be bumped into rear drill bit to have certain sword of going out, and simultaneously in order to reduce alloy shearing force, it is 35 ° that more solito gets incline angle of side teeth.YG8c or YJ2H hemisphere tooth selected by drill bit carbide alloy, ensures higher hardness and good toughness.Before inserted, according to magnitude of interference grinding alloy.
The transmission of the utility model pressure and torque transmission mechanism comprise core bit 15 and pipe bit 14.Mainly realize pressure and moment of torsion to reach drill bit fractured rock and synchronously follow up.During drilling tool work, pressure and moment of torsion through impacting joint 1, outer tube 6 is delivered to core bit 15 and pipe bit 14, realize drill bit synchronously broken rock creep into; Core bit 15 and pipe bit 14 have pressure to transmit step 26 respectively, and pressure transmits step 26 by core bit 15 and pipe bit 14 pressure to contact transmission; In torque transmission mechanism, three boss are designed with in pipe bit 14, core bit 15 is designed with three sludge grooves 27, excircle upwards has three not penetrating grooves, its width is slightly larger than the width of three boss, rear three boss of drilling tool revolution enter in three not penetrating grooves, and make pipe bit 14 and core bit 15 contacts side surfaces be attached to one, transmitting torque turns round jointly.After reversion, boss produces not penetrating groove, is arranged in sludge groove 27, and in lift, during drilling tool, core bit 15 pulls out from pipe bit 14.
The utility model drilling tool gas channel system comprises high-pressure channel and low-pressure channel.Major function guides at the bottom of hole by pressure-air, washes away cooling to hole subdrilling head, bed rock bits in hole is carried to ground simultaneously, plays purification drilling action; Low-pressure channel is the return air channel of basket, when rock core is with when drilling into basket, by inner air tube and water (underground water) from return air channel top toward one way valve and connecting axle 4 to the first annular gap, converge with high-pressure channel gas, avoid managing interior air water mineralization pressure, rock core of eliminating the effects of the act enters the factor in pipe.High-pressure channel loop forms slant height on the first annular gap M, core bit 15 by drilling rod, impactor, impact joint 1 axle centre bore H, interior pipe 7 and outer tube 6 and extrudes gas port L and outer tube 6 and sleeve pipe 11 and form the second annular gap N and form; Low-pressure channel loop forms the first annular gap M by interior pipe 7, one way valve, connecting axle 4 centre bore and interior pipe 7 and outer tube 6 and forms.In drilling process, gases at high pressure flow to impact joint 1 axle centre bore H through drilling rod, impactors, flow to again and form the first annular gap M by interior pipe 7 with outer tube 6, on core bit 15, slant height extrudes gas port L outflow again, cooling is washed away to hole subdrilling head, carries rock dust bits and flow to and form the second annular gap N by outer tube 6 and sleeve pipe 11 and discharge ground; Low-pressure gas in interior pipe 7 injects the first annular gap M via valve seat 16 and steel ball 17 one way valve and connecting axle 4 central through hole passage.
Be combined as down-hole hammer (separately joining), core drill and casing drilling tool that the utility model creeps into conventional drilling tool form.As required at drilling rod intermediate configurations centralizer, impactor upper end adjunction sediment tube etc. when creeping into.Need when reclaiming, to select quality material to produce with pipe-in-pipe with pipe-in-pipe 11.When not needing to reclaim, light-wall pipe or the cheaper tubing of material can be selected.Sleeve pipe 11 screw thread is contrary with drill rod thread rotation direction, the optional special trapezoidal thread of form of thread or circular arc type screw thread.The rising of sleeve pipe 11 is pulled out can with hydraulic tube drawing bench or vibrator vibration pipe-drawing, and vertical shallow bore hole also can strike back pipe with sash weight.
With reference to accompanying drawing 2, single action damper mechanism mainly realizes the effect of single action vibration damping, outer tube 6 by screw thread with impact joint 1 and core barrel head 5 connecting axle 4 that is connected with interior pipe 7 is connected by thrust ball bearing 21 radial ball bearing 22, realizing impacting joint 1 drives outer tube 6 and core bit 15 to rotate, and connecting axle 4 and core barrel head 5 and interior pipe 7 do not rotate; Impacting joint 1 lower end and installing one group of disk spring 2 between thrust ball bearing 21, radial ball bearing 22 and connecting axle 4, play damping effect.
With reference to accompanying drawing 3, interior pipe governor motion mainly regulates the gap between the pawl spring seat 8 of interior pipe 7 lower end socket card center device and core bit 10.
Controlling by turning rotating nut 18 gap that core barrel head 5 to be threaded with connecting axle 4 between the pawl spring seat 8 of length adjustment card center device and core bit 15, guaranteeing that the gap between pawl spring seat 8 and core bit 10 is applicable to.
With reference to accompanying drawing 4,5, pressure transmission and torque transmission mechanism mainly realize pressure and moment of torsion and reach drill bit fractured rock and synchronously follow up.During drilling tool work, pressure and moment of torsion through impacting joint 1, outer tube 6 is delivered to core bit 15 and pipe bit 14, realize drill bit synchronously broken rock creep into; Core bit 15 and pipe bit 14 have pressure to transmit step 26 respectively, and pressure contacts transmission by core bit 15 with pipe bit 14 pressure transmission step 26; In torque transmission mechanism, three boss are designed with in pipe bit 14, core bit 15 is designed with three sludge grooves 27, excircle upwards has three not penetrating grooves, its width is slightly larger than the width of three boss, rear three boss of drilling tool revolution enter in three not penetrating grooves, and make pipe bit 14 and core bit 15 contacts side surfaces be attached to one, transmitting torque turns round jointly.After reversion, boss produces not penetrating groove, is arranged in sludge groove, and in lift, during drilling tool, core bit 15 pulls out from pipe bit 14.
Sleeve pipe hitch comprises sleeve pipe 11, pipe bit 14, casing shoe 12, snap ring 13.The sleeve pipe 11 of casing drilling tool by joint and casing shoe 12 screwed connection, the connection design flexibility snap ring of pipe bit 14 and casing shoe 12, snap ring is opening annulus, effective through experiment power transmission, does not occur damaging phenomenon; Pipe bit 14 and casing shoe 12, snap ring 13 are connected to form the suspended structure can rotated around the axial line of sleeve pipe 11, pipe bit 14 can rotate around casing shoe, snap ring transmits sleeve pipe axial force, and wherein pipe bit 14 is rotatable, and sleeve pipe and casing joint 11 and casing shoe 12 etc. do not rotate; Snap ring 13 wall thickness equals casing shoe 12 annular groove depth, snap ring 13 internal diameter equals pipe bit 14 cannelure path, pipe bit 14 annular groove depth is less than snap ring 13 wall thickness, first snap ring 13 is loaded in casing shoe 12 during assembling, then pipe bit 14 is compressed into, install rear sleeve drill bit 14 and can freely rotate with casing shoe 12; Pipe bit 14 drives casing shoe 12 sleeve pipe 11 synchronously to follow up by snap ring 13.
With reference to accompanying drawing 6, the mechanism that cores containing card center device comprises rock core through core bit 15, needle roller 10, card center device.The card center device of coring in mechanism is made up of pawl spring seat 8 and pawl spring 9, and in pawl spring seat 8, outer gradient of gradient and pawl spring 9 coordinate and can slippage mutually; Pawl spring seat 8 upper end and interior pipe 7 lower end optical axis portion are socketed and slip; Needle roller 10 is provided with between pawl spring seat 8 and coring bit 15, play drag reduction and correcting effect, pawl spring 9 has reversed acanthoid elasticity handgrip, when creeping into, the upwards slippage of card center device, rock core enters interior pipe 7 through core bit 15 and pawl spring 9, drill bit 15 internal diameter than interior pipe 7 and pawl spring 9 internal diameter little, rock core can freely enter; When carrying brill, the downward slippage of card center device, elasticity handgrip shrinks card and gets and keep off coring, and rock core can not come off, and improves quality of coring.
With reference to accompanying drawing 1,7,8,9,10, in the design of pipe bit 14, core bit 15, core bit 15 bottom welding-on three groups of ball post alloy 25,6, outer ring ball post alloy, centre circle 2 ball post alloy, inner ring 1 ball post alloy; Pipe bit 14 welding-on has three layers of ball post alloy 25,9, outer ring ball post alloy, centre circle 6 ball post alloy, inner ring 3 ball post alloy.(pipe bit and high pressure outlet air hole) formula structure taked in advance by core bit 15, its fragmentation (rock) labial surface advanced high pressure outlet air hole L can make pressure-air directly get rid of from high pressure outlet air hole L, ensureing fully to wash away at the bottom of landwaste Purge holes and under the prerequisite of cooling drill bit, eliminating pressure-air and directly wash away the unfavorable factor that Bit face rings core sampler quality.Reaming aperture is 10mm more than larger than sleeve outer generally, to reduce the frictional resistance of hole wall to sleeve pipe 11.Drill bit minimum cross section size can not be less than 6mm, ensures the linking intensity of force transmission mechanism, and under large impact energy, drill bit can not be out of shape or cracked.Drill bit material select have 45CrNiMoVA, XG25,42CrMo etc., after integral quenching tempering, hardness about HRC40 ~ 44, guaranteed strength, toughness.Permanent tooth quality can be ensured again.Drill bit generally adopts interference to cold pressing or hot pressing craft of consolidating teeth, ensures that steel physical efficiency lives carbide alloy effectively admittedly, and makes heel teeth be bumped into rear drill bit to have certain sword of going out, and simultaneously in order to reduce alloy shearing force, it is 35 ° that more solito gets incline angle of side teeth.YG8c or YJ2H hemisphere tooth selected by drill bit carbide alloy, ensures higher hardness and good toughness.Before inserted, according to magnitude of interference grinding alloy.
Claims (5)
1. air latent drift single-action twin-pipes is cored a casing drilling tool, it is characterized in that: be made up of center core drill and casing drilling tool;
Center core drill is single-action twin-pipes core drill, by single action damper mechanism, interior pipe governor motion, forms containing the mechanism that cores of card center device; Single action damper mechanism comprises impact joint, disk spring, bearing support, connecting axle, thrust ball bearing and radial ball bearing; Outer tube is connected with impact joint by screw thread, interior pipe is connected with core barrel head, core barrel head is connected with connecting axle, connecting axle is connected with impact joint with radial ball bearing by thrust ball bearing, realizing impacting joint drives outer tube and core bit to rotate, and connecting axle and core barrel head and interior pipe do not rotate; Impacting joint lower end and arranging one group of disk spring between thrust ball bearing, radial ball bearing and connecting axle, play damping effect;
Interior pipe governor motion comprises connecting axle, core barrel head, interior pipe and nut; Nut and connecting axle are threaded connection, and connecting axle and core barrel head are threaded connection, and core barrel head and interior pipe are threaded connection; Controlling by turning rotating nut the gap that core barrel head to be threaded with connecting axle between the pawl spring seat of length adjustment card center device and core bit, guaranteeing that the gap between pawl spring seat and core bit is applicable to;
The mechanism that cores containing card center device comprises outer tube, interior pipe, connecting axle, core barrel head, core bit, needle roller, pawl spring seat and pawl spring; Pawl spring seat and pawl spring composition card center device, in pawl spring seat, gradient and outer gradient of pawl spring coordinate and can slippage mutually; Pawl spring seat upper end and interior pipe lower end optical axis portion are socketed and slip; Be provided with needle roller between pawl spring seat and coring bit, play drag reduction and correcting effect, pawl spring has reversed acanthoid elasticity handgrip, when creeping into, the upwards slippage of card center device, rock core enters interior pipe through core bit and pawl spring, drill bit internal diameter than interior pipe and pawl spring internal diameter little, rock core can freely enter; When carrying brill, the downward slippage of card center device, elasticity handgrip shrinks card and gets and keep off coring, and rock core can not come off, and improves quality of coring;
Casing drilling tool is made up of sleeve pipe, casing joint, casing shoe, snap ring, pipe bit, is concentric reaming casing drilling tool; Sleeve pipe is by casing joint and casing shoe screwed connection, and the connection of pipe bit and casing shoe adopts snap ring, and snap ring is opening annulus; Pipe bit and casing shoe adopt snap ring to be connected to form the suspended structure can rotated around the axial line of sleeve pipe, pipe bit can rotate around casing shoe, snap ring transmits sleeve pipe axial force, and wherein pipe bit is rotatable, and sleeve pipe, casing joint and casing shoe do not rotate; Snap ring wall thickness equals casing shoe annular groove depth, snap ring internal diameter equals pipe bit cannelure path, pipe bit annular groove depth is less than snap ring wall thickness, first snap ring is loaded in casing shoe during assembling, then pipe bit is compressed into, install rear sleeve drill bit and casing shoe can freely rotate; Pipe bit drives casing shoe by snap ring, sleeve pipe synchronously follows up.
2. air latent drift single-action twin-pipes according to claim 1 is cored casing drilling tool, it is characterized in that: center core drill and casing drilling tool realize pressure by pressure transmission and torque transmission mechanism and moment of torsion reaches drill bit fractured rock and synchronous follow-up; Pressure transmission and torque transmission mechanism comprise core bit and pipe bit and realize pressure and moment of torsion and reach drill bit fractured rock and synchronously follow up, during drilling tool work, pressure and moment of torsion through impacting joint, outer tube is delivered to core bit and pipe bit, realize drill bit synchronously broken rock creep into; Core bit and pipe bit have pressure to transmit step respectively, and pressure transmits step by core bit and pipe bit pressure to contact transmission; Pressure transmit and torque transmission mechanism in, be provided with three boss in pipe bit, core bit is provided with three sludge grooves, and excircle upwards has three not penetrating grooves, its width is slightly larger than the width of three boss, rear three boss of drilling tool revolution enter in three not penetrating grooves, and make pipe bit and core bit contacts side surfaces be attached to one, transmitting torque turns round jointly, after reversion, boss produces not penetrating groove, is arranged in sludge groove, and in lift, during drilling tool, core bit pulls out from pipe bit.
3. air latent drift single-action twin-pipes according to claim 1 is cored casing drilling tool, it is characterized in that: the gas channel system of drilling tool is made up of high-pressure channel loop and low-pressure channel loop, high-pressure channel loop forms slant height on the first annular gap M, core bit by drilling rod, impactor, impact joint axis centre bore H, interior pipe and outer tube and extrudes gas port L and outer tube and sleeve pipe and form the second annular gap N and form; Low-pressure channel loop forms the first annular gap M by interior pipe, one way valve, connecting axle centre bore and interior pipe and outer tube and forms; In drilling process, gases at high pressure flow to impact joint axis centre bore H through drilling rod, impactors, flow to again and form the first annular gap M by interior pipe and outer tube, on core bit, slant height extrudes gas port L outflow again, cooling is washed away to hole subdrilling head, carries rock dust bits and flow to and form the second annular gap N by outer tube and sleeve pipe and discharge ground; Low-pressure gas in interior pipe injects the first annular gap M via valve seat and ball check valve and connecting axle central through hole passage.
4. air latent drift single-action twin-pipes according to claim 1 is cored casing drilling tool, it is characterized in that: in pipe bit, core bit are arranged, core bit exceeds pipe bit to overhanging, pipe bit bottom is 90mm higher than core bit, core bit bottom welding-on three groups of ball post alloy, the three groups of ball post alloy in 6, outer ring, centre circle 2 ball post alloy, inner ring 1 ball post alloy; Pipe bit welding-on has three layers of ball post alloy, 9, outer ring ball post alloy, centre circle 6 ball post alloy, inner ring 3 ball post alloy.
5. air latent drift single-action twin-pipes according to claim 1 is cored casing drilling tool, it is characterized in that: heavy wall compo pipe selected by core drill outer tube, after heat treatment hardness is in HRC32 ~ 36, guarantee the transmission of ballistic work, outer tube and coring bit, outer tube and impact joint connections threads adopt corrugated thread.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420620816.XU CN204283209U (en) | 2014-10-26 | 2014-10-26 | Air latent drift single-action twin-pipes is cored casing drilling tool |
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| CN201420620816.XU CN204283209U (en) | 2014-10-26 | 2014-10-26 | Air latent drift single-action twin-pipes is cored casing drilling tool |
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| CN204283209U true CN204283209U (en) | 2015-04-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295232A (en) * | 2014-10-26 | 2015-01-21 | 江苏省南京工程高等职业学校 | Single-action double-pipe coring overburden drill tool for air down-the-hole hammer |
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2014
- 2014-10-26 CN CN201420620816.XU patent/CN204283209U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104295232A (en) * | 2014-10-26 | 2015-01-21 | 江苏省南京工程高等职业学校 | Single-action double-pipe coring overburden drill tool for air down-the-hole hammer |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20161026 |