Hybrid downhole drill drill bitTechnical field
The present invention relates to a kind of Mixed drilling bit for oil, natural gas and geological drilling, particularly relate to onePlant hybrid downhole drill drill bit.
Technical background
In current oil drilling, when running into hard formation or hard interbedded layer, conventional PDC drill bit, mainlyRealize creeping into by the shearing motion mode of PDC tooth (composite polycrystal-diamond), at the nose of drill bitAnd shoulder, due to PDC tooth load characteristic distributions on bit profile, easy premature breakdown, cause PDCThe rate of penetration of drill bit becomes slowly；And rifler is to impact crushing mode fractured rock, easily makeRock produces deeper crushing teeth hole；But for the strata drilling that soft or hard interlayer is more, it is impossible to make rock produceVolumetric fracture, therefore the stock-removing efficiency of rifler cutting tooth is relatively low.Still further aspect, when drill bit runs into oneDuring the stratum that soft or hard interlayers are more a bit, the fixing cutting tooth of PDC diamond bit is highly prone to impact breakage, forThis situation of reply, the Chinese patent literature of Application No. " 200880016630.0 " discloses by gear wheelThe Mixed drilling bit that drill bit and PDC drill bit combine, though this Mixed drilling bit has stronger combination property, but depositsDeficiency following: the impact that has due to rifler, the rock breaking mechanism of crushing, gear wheel rotarily drive fromThe shock loading that the multiple chisel teeth of body produces can effectively crush hard formation；And too high the pressure of the drill to be easily caused drill bit solidOn the stationary knife wing, composite sheet (PDC tooth) crushes, thus causes the reduction of drill bit rate of penetration；This drill bit is near boringHead central axis is that PDC cuts tooth, owing to this drill bit PDC cutting tooth is near drill axis center,The radius of gyration is little, and cutting linear velocity is low, and often stock-removing efficiency is low；And this drill bit is cut tooth by PDC and individually cutsCutting bit central rock, the load born is relatively big, easily occurs that PDC layer is broken or comes off in interlayer creeps into.
Summary of the invention
The purpose of the present invention is that provides a kind of hybrid downhole drill drill bit to solve the problems referred to above.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of hybrid downhole drill drill bit, including drill body, wing, bit leg and gear wheel, described wingAll fixing with the upper end of described drill body with described bit leg and be connected, the lower end of described bit leg is with described drill bit originallyThe sidewall of body is fixing to be connected, and described gear wheel is rotatably connected by the upper end of axle journal with described bit leg, described toothIt is provided with angle between axis and the axis of described drill body of wheel, described wing is provided with multipleConical tooth, or/and disk shearing tooth, described gear wheel is provided with multiple chisel teeth and tack tooth.
Preferably, with described wing cut time direction of rotation as front, all of described wing at least wrapsIncluding a wing only having conical tooth, the described wing only having conical tooth includes front-seat conical tooth, described only hasThe front-seat conical tooth of the wing of conical tooth is distributed in the described only inner cone of profile of wing of conical tooth, noseWith shoulder position, the front-seat conical tooth proud exposure of the described wing only having conical tooth is more than other described wingFront-seat disk shearing tooth proud exposure, and its difference in height is less than 2 millimeters.
Further, the described wing only having conical tooth also includes heel row conical tooth, the described cutter only having conical toothThe heel row conical tooth of the wing is distributed in the described inner cone of profile of wing, nose and the shoulder position only having conical tooth,It is provided with the height less than 2 millimeters between front-seat conical tooth and the heel row conical tooth of the described wing only having conical toothDegree difference and this front row conical tooth are higher than this heel row conical tooth.
As preferably, be provided with between front-seat conical tooth and the cutting face of described wing angle for-17 °～The angle of heel of+17 ° and the top rake that angle is 0～+17 °, between described heel row conical tooth and cutting face betweenIt is provided with the top rake that angle is-8 °～+8 °.
As preferably, with described wing cut time direction of rotation as front, in all of described wing at leastIncluding two front toothrows be disk shearing tooth, rear toothrow be the wing of conical tooth, described disk shearing tooth is distributedIn inner cone, nose, shoulder and the gauge position of described wing profile, it is right that this wing heel row conical tooth is distributed inAnswer the inner cone of profile of described wing, nose and shoulder position；The exposure of the front-seat disk shearing tooth of this wingThe proud exposure of aspect ratio heel row conical tooth is big, and its difference in height is less than 2 millimeters, in said two wingHeart line angle angle on the circumferencial direction of described drill body is 160 °～200 °.
Further, the hypsokinesis that angle is-17 °～+35 ° it is provided with between described disk shearing tooth and cutting faceAngle and the angle of heel that angle is-17 °～+17 °, be provided with angle between described heel row conical tooth and cutting faceFor the top rake of-8 °～+8 °.
Preferably, described conical tooth and described disk shearing tooth are polycrystal diamond composite teeth or are surpassed by polycrystallineThe composite teeth that grinding-material manufactures, described chisel teeth and described tack tooth are hard-metal insert.
Preferably, the quantity of described gear wheel is at least one, and the outermost profiled envelope line of its cutting tooth existsOutside the outermost profiled envelope line of the fixing cutting tooth of described drill body, and distance between the two be 0.8～2.5 millimeter.
Specifically, the angle angle between axis and the axis of described drill body of described gear wheel is25 °～68 °.
The beneficial effects of the present invention is:
1, by impact grinding and the mixing plow of wing structure drill bit of cloth tooth, the shearing motion phase of riflerIn conjunction with, it is achieved shaft bottom precrushing, it is ensured that fixing cutting tooth effective wedging rock, eliminate drill bit special at someThere is stick-slip phenomenon in stratum, reduces the shock loading of fixing cutting tooth, decreases fixing cutting tooth impact failureProbability, improve bit cutting efficiency and rate of penetration；
2, mix the wing structure drill bit of cloth tooth, enhance drill body at viscous interlayer and the stiff plastic interlayer mouldedDrilling efficiency and the bearing capacity of cutting tooth；Improve the life-span of drill bit wing, be conducive to extending hybrid brillWell bit life；
3, more being born by gear wheel cutting tooth of shock loading that drill bit produces in the course of the work, drops furtherThe low shock loading of PDC composite sheet, decreases the probability that the impact of PDC composite sheet is damaged, thus improves brillThe overall stock-removing efficiency of head and rate of penetration.
Accompanying drawing explanation
Fig. 1 is the top view of traditional Mixed drilling bit；
Fig. 2 is the side view of traditional Mixed drilling bit；
Fig. 3 is the cutting structure distribution side view of traditional Mixed drilling bit；
Fig. 4 is the schematic diagram of wing of the present invention and gear wheel position；
Fig. 5 is that conical tooth of the present invention and disk shearing tooth are in the location mode of wing profile and showing of featureIt is intended to；
Fig. 6 is the top view of hybrid drilling bit in embodiment one of the present invention；
Fig. 7 is the side view of hybrid drilling bit in embodiment one of the present invention；
Fig. 8 is the top view of hybrid drilling bit in embodiment two of the present invention；
Fig. 9 is the top view of hybrid drilling bit in embodiment three of the present invention；
Figure 10 is the side view of hybrid drilling bit in embodiment three of the present invention；
Figure 11 is the top view of hybrid drilling bit in embodiment four of the present invention；
Figure 12 is disk shearing tooth back rake angle change schematic diagram on wing in each embodiment of the present invention；
Figure 13 is conical tooth Change of anteversion schematic diagram on wing in each embodiment of the present invention；
Figure 14 is that the exposure discrepancy in elevation of the disk shearing tooth of the conical tooth of wing 13 in Fig. 6 and wing 32 is sameGraph of a relation before and after radial location.
Figure 15 is to describe conical tooth and the exposure discrepancy in elevation schematic diagram of disk shearing tooth in Figure 14, reflects Fig. 6Track relation during the disk shearing tooth drilling well of the conical tooth of middle wing 13 and wing 32.
Figure 16 is that the exposure discrepancy in elevation of disk shearing tooth and conical tooth on wing 60 in embodiment described in Fig. 8 is sameGraph of a relation before and after Radius position.
Figure 17 is to describe disk shearing tooth and the exposure discrepancy in elevation schematic diagram of conical tooth in Figure 16, reflects Fig. 8In described embodiment, on wing 60, the exposure discrepancy in elevation of disk shearing tooth and the conical tooth well-bottom trace when drilling well showsIt is intended to.
Figure 18 is to have heel row conical tooth in embodiment described in Figure 11 on the wing of only conical tooth, is described inSame wing is gone forward, the exposure discrepancy in elevation of heel row conical tooth graph of a relation before and after same radial location.
Figure 19 is to describe front-seat conical tooth and the exposure discrepancy in elevation schematic diagram of heel row conical tooth in Figure 18, reflectsFigure 11 goes forward at same wing 113, heel row conical tooth drilling well time formed well-bottom trace schematic diagram.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
Shown in Fig. 1, Fig. 2, Fig. 3 be Application No. 200880016630.0 Chinese patent literature inMixed drilling bit, including drill body 5, wing 200, bit leg 300 and gear wheel 100, wing 200 and bit leg300 all fixing with the upper end of drill body 5 are connected.Fig. 1 and Fig. 2 describe in a different manner two wings andThe Mixed drilling bit of double gear wheels combination；Fig. 3 simplify describe on gear wheel cutting tooth and wing on shearing tooth pointMode for cloth, reflects domestic and international conventional hybrid drill bit feature.
For the ease of the description of each embodiment, in each embodiment, the label of each parts is all according to mark shown in the drawingsNote is described, gear wheel in following each embodiment, bit leg, wing all with the tooth in Fig. 1, Fig. 2, Fig. 3Wheel 100, bit leg 300 and wing 200 are corresponding.
As shown in Figure 6 and Figure 7, hybrid downhole drill drill bit of the present invention includes drill body 5, front rowThere are wing 32 and the only wing 13 of conical tooth, bit leg 10 and the gear wheel 11 of disk shearing tooth；Its all with boreHead body 5 is fixing to be connected, and the lower end of bit leg 10 is fixing with the sidewall of drill body 5 to be connected, gear wheel 11Axle journal is rotationally connected (referring to Fig. 4) with the upper end of bit leg 10 by bearing；Gear wheel 11 passes through axle in the figure 7Neck is rotatably connected with the upper end of bit leg 10, and the lower end of bit leg 10 is fixing with the sidewall of drill body 5 to be connected；Fig. 4 is provided with included angle B, in Fig. 4 between axis 4 and the axis 6 of drill body 5 of gear wheel 11Cut tooth distribution and describe Fig. 7 gear wheel cutting tooth and front-seat wing 32 the dividing on wing having disk shearing toothCloth method.Reflect Fig. 6 front row in Figure 5 and have the wing 32 of disk shearing tooth and the wing of only conical tooth13 in the distribution mode of wing profile.Front-seat wing 32 and the only taper having shearing tooth in figure 6 and figure 7The wing 13 of tooth is provided with multiple disk shearing tooth 7 and multiple conical tooth 8, and gear wheel 11 is provided with multiple chiselShape tooth 3 and tack tooth 2.
Describe on reflection drill body 5 by Fig. 6, Fig. 8, Fig. 9, Figure 11 and at least include only conical toothWing 13, wing 53, wing 83, wing 113, conical tooth be distributed in the inner cone of wing profile, nose andShoulder position；Only have on the wing 13 of conical tooth, wing 53, wing 83, wing 113 and have rear toothrow for coneShape tooth, each wing at least heel row conical tooth (with reference to Figure 11, Figure 18 and Figure 19)；Front-seat coneThe difference in height less than 2 millimeters it is provided with, with wing 13, wing 53, wing between shape tooth and heel row conical tooth83, the cutting direction of wing 113 is front, wing 13, wing 53, wing 83, the front-seat cone of wing 113Being provided with angle of heel and top rake between shape tooth and cutting face, the angle of angle of heel is-17 °～+17 °, frontThe angle at inclination angle is 0～+17 °；Front-seat cone it is provided with on same wing by describing of Figure 18 and Figure 19Shape tooth and heel row conical tooth aligning method, the only wing 13 of conical tooth, wing 53, wing 83 wing 113On to have rear toothrow be conical tooth, each wing at least heel row conical tooth；Before heel row conical tooth is provided withInclination angle, the angle of top rake is-8 °～+8 °.
Described by Fig. 5, Fig. 6, Fig. 8, Fig. 9, Figure 11 and on drill body 5, at least include two front toothrowsFor wing 32, wing 52, wing 60 and the wing 132 of disk shearing tooth, disk shearing tooth is distributed in wingThe inner cone of profile, nose, shoulder and gauge position；Two front toothrows are the wing 32 of disk shearing tooth, cutterThe wing 53, wing 60 and the wing 132 angle angle on the circumferencial direction of drill body 5 be 160 °～200°.Two front toothrows of Fig. 8 and Figure 11 be disk shearing tooth wing 60 and wing 132 on have afterToothrow is conical tooth, and heel row conical tooth is distributed in the nose of wing profile to shoulder position, the front row of this wingThe proud exposure of disk shearing tooth is bigger than the proud exposure of heel row conical tooth, and its difference in height is less than 2 millimeters,Being front with wing 60 and wing 132 cutting direction, disk shearing tooth and cutting face are provided with back rake angle and inclinationAngle, the angle of the back rake angle of disk shearing tooth is-17 °～+35 °, and the angle of disk shearing tooth angle of heel is-17 °～+17 °；By be provided with on the same wing of the description of Figure 16 and Figure 17 front-seat disk shearing tooth andThe aligning method of heel row conical tooth, has heel row conical tooth, heel row conical tooth to set on wing 60 and wing 132Being equipped with top rake, the angle of top rake is-8 °～+8 °.
Fig. 4 is wing and the schematic diagram of a gear wheel cutting element method for arranging having disk shearing tooth, whereinThere is an included angle B axis 6 and gear wheel axis 4 including drill body 5, and angle B is at 25 degree to 68Between degree, the gear wheel chisel teeth 3 on gear wheel and the cutting of the scraper of tack tooth 2 and disk shearing tooth 7 formationStructure is in conplane distribution, and the proud exposure of gear wheel chisel teeth 3 is more than disk shearing tooth 7 on wingHighly, difference in height is between 0.8 millimeter to 2.5 millimeter, and chisel teeth 3 and tack tooth 2 on gear wheel are positioned atThe nose of wing profile and shoulder, both around gear wheel axis 4 rotation during drilling well, again around in downhole drill bitMandrel line 6 revolves round the sun.
Fig. 5 is disk shearing tooth and conical tooth distribution characteristics on wing, describes disk on wing in figureShearing tooth and conical tooth project to an example of the location mode in a plane: 81 points of the upper conical tooth of wingIt is distributed in the inner cone of wing profile, nose and shoulder position；Disk shearing tooth 85 be distributed in wing profile inner cone,Nose, shoulder and gauge position (containing active gage and passive gauge), disk shearing tooth 85 is positioned at wingThe active gage of profile, disk shearing tooth 185 is positioned at the passive gauge of wing profile, the upper conical tooth of wing 81There is different proud exposures with disk shearing tooth 85, and its difference in height is less than 2 millimeters, in wing profileCone, nose, the proud exposure of shoulder position cutting element are changes, and conical tooth 81 is at wing profile notThe angle of heel changed with position；Conical tooth 81 has angle of heel, and the excursion of angle of heel is at-17～+17 degreeBetween change, on all wings of hybrid drilling bit, disk shearing tooth and conical tooth define wing profileAll standing.
The structure of the present invention is applied to multiple example simultaneously, provides several embodiment below in conjunction with the accompanying drawings.
Embodiment 1:
As shown in Figure 6 and Figure 7, disclose a kind of hybrid downhole drill drill bit, including drill body 5, boreHead body 5 includes two wings 13 only having conical tooth 8 and two other wings 32 and two bit legs 10,Bit leg 10 lower end is integrally welded with drill body 5, and the upper end of bit leg 10 arranges axle journal, and gear wheel 11 is set withOn axle journal；Chisel teeth 3 and tack tooth 2, the chisel teeth 3 on gear wheel 11 of in a row distribution is had on gear wheel 11Nose and shoulder with tack tooth 2 is positioned at wing profile, both around gear wheel 11 axis rotation during drilling well, encloses againCentral shaft around downhole drill bit revolves round the sun, and wherein has an angle between the centrage of gear wheel 11 axis and bit body 5Spending at 35 degree angles between 65 degree, two only the wings 13 of conical tooth 8 and two are provided with front rowThe wing 32 of disk shearing tooth 7, only front-seat conical tooth 8 proud exposure of the wing 13 of conical tooth 8 is more thanThe proud exposure of the front-seat disk shearing tooth 7 of other wing 32, and its difference in height is less than 2 millimeters.At twoHaving nozzle 1 between wing, the wing 32 in Fig. 7 has passive gauge 14, has chip area 9 between wing 32；There is joint 15 to be threaded on drill body 5, link together with DHA during drilling well.
Embodiment 2:
As shown in Figure 8, disclosing another kind of hybrid downhole drill drill bit, including drill body 5, drill bit is originallyBody 5 includes two wings 60 being provided with front-seat disk shearing tooth 77 and two wings only having conical tooth 8883, two bit legs and two gear wheels 61；Gear wheel chisel teeth 66 and the tack tooth of in a row distribution is had on gear wheel 6163, chisel teeth 66 on gear wheel and tack tooth 63 are positioned at nose and the shoulders of wing 60 profile, its dens in denteTake turns and have an angle between the centrage of 61 axis and downhole drill bit body 5 between 25 degree to 68 degreeAngle；Two front rows are disposed with on the wing 60 of disk shearing tooth 77 that to have rear toothrow, rear toothrow be conical tooth75, rear toothrow conical tooth 75 in the position distribution of wing profile in the nose of wing profile and shoulder, sameOn wing, front-seat disk shearing tooth 77 proud exposure is more than the proud exposure of heel row conical tooth 75, its difference in heightBetween being 0 to 2 millimeters；Nozzle 80 and chip area 90 is had between two wings.At drill body 5 up toA rare wing is all arranged as conical tooth 88；Only having the wing 83 of conical tooth 88, conical tooth 88 is at cutterThe position distribution of wing contour is in inner cone, nose and the shoulder of wing profile, with reference on Fig. 7 drill body 5Fixing wing 13 has passive gauge 14；Chip area 9 is had between fixing wing；Joint 15 is had on drill body 5It is threaded, links together with DHA during drilling well.
Embodiment 3:
As shown in Figure 9 and Figure 10, disclose another kind of hybrid downhole drill drill bit, including drill body 5,Drill body 5 includes that there are the wing 52 of disk shearing tooth 44 and a cutter only having conical tooth 45 in two front rows53, two bit legs 33 of the wing and two gear wheels 35, bit leg 33 one end is integrally welded with drill body 5, toothThe other end of the palm 33 arranges axle journal, and gear wheel 35 is sleeved on axle journal (with reference to Fig. 4)；Have on gear wheel 35Row is distributed chisel teeth 20 and tack tooth 22, and chisel teeth 20 and tack tooth 22 on gear wheel 35 are positioned at wingThe nose of profile and shoulder, both around gear wheel 35 axis rotation during drilling well, again around the central shaft of downhole drill bitRevolution；Wherein there is an angle between gear wheel 35 axis and downhole drill bit body 5 centrage at 35 degree to 65Angle between degree；Include on drill body 5 that there are the wing 52 of disk shearing tooth 44 and one in two front rowsOnly having the wing 53 of conical tooth 45, only the front-seat conical tooth proud exposure of the wing 53 of conical tooth 45 is more thanThe proud exposure of the front-seat disk shearing tooth 44 of other wing 52, and its difference in height is less than 2 millimeters.At twoNozzle 21 is had between wing.Fix in Fig. 10 and on wing 53, be provided with passive gauge 39；Fixing wing itBetween have chip area 30；Joint 41 is had to be threaded on drill body 5, during drilling well with DHA evenIt is connected together.
Embodiment 4:
As shown in figure 11, disclosing another kind of hybrid downhole drill drill bit, including drill body 5, drill bit is originallyBody 5 include the wing 113 that there is a wing 132 of disk shearing tooth 124 at two front rows and one only has conical tooth,Two bit legs 33 and two gear wheels 115, gear wheel 115 has gear wheel chisel teeth 128 and tack tooth 126, toothChisel teeth 128 on wheel and tack tooth 126 are positioned at nose and the shoulder of wing profile, wherein gear wheel 115 axleHave an included angle B between the centrage of line and bit body 5, angle B at 25 degree between 68 degree；Drill bit is originallyIncluding two front rows to have on the wing 132 of disk shearing tooth 124 on body 5 and be provided with rear toothrow, rear toothrow isConical tooth 121；Heel row conical tooth 121 in the position distribution of wing 132 profile in the nose of wing 132 profileTo shoulder, on same wing, front row is that the proud exposure of disk shearing tooth 124 is more than heel row conical tooth 121Proud exposure, the scope of difference in height is between 0 to 2 millimeters；Before only the wing 113 of conical tooth includesRow's conical tooth 118 and heel row conical tooth 119, the proud exposure of the front-seat conical tooth 118 of wing 113 is more than being somebody's turn to doThe proud exposure of the heel row conical tooth 119 of wing 113, and its difference in height is less than 2 millimeters.This wing 113Front-seat conical tooth 118 and heel row conical tooth 119 are distributed in the inner cone of wing profile, nose and shoulder.TwoNozzle 130 and chip area 110 is had between individual wing；On drill body 5 at least complete on a wing 113Portion is arranged as conical tooth 118, conical tooth 118 in the position distribution of wing 132 profile in wing 132 profileInner cone, nose and shoulder.Drill body 5 includes that there is wing 132 He of disk shearing tooth 124 at two front rowsArticle one, the wing 113 only having conical tooth has arranged passive gauge；Referring to Figure 10, drill body 5 includes indulgingPassive gauge 39 is had to three the fixing wings downwardly extended；Chip area 30 is had between fixing wing；Drill bitThere is joint 15 to be threaded on body 5, link together with DHA during drilling well.
In aforementioned four example, each example includes the wing of disk shearing tooth, and disk shearing tooth is permissibleIt is distributed in the inner cone of wing profile, nose, shoulder, active gage and passive gauge.
Figure 12 describes disk shearing tooth on wing different back rake angles, has plus caster angle, 0 degree of back rake angleAnd minus caster.Disk shearing tooth is distributed in the inner cone of wing profile, nose, shoulder and gauge position；CircleThe back rake angle of sheet shearing tooth is change；The scope of back rake angle changes between-17～+35 degree.
Figure 13 describes conical tooth has different top rakes at the different parts of wing；Including positive top rake, 0Degree top rake and negative top rake.Conical tooth is distributed in the inner cone of wing profile, nose, shoulder position；Front-seatBeing provided with top rake between conical tooth and cutting face, the angle of top rake is 0～+17 °；Heel row conical tooth withBeing provided with top rake between cutting face, the angle of top rake changes between-8～+8 °.
Figure 14 and Figure 15 describes feature in Fig. 6 and Fig. 9 embodiment, only conical tooth wing 13 (or53) and the drill bit that formed of the wing 32 (or 52) at front-seat disk shearing tooth place, on drilling process cutting groundThe working method of layer and the well-bottom trace schematic diagram of formation.Disk shearing tooth and conical tooth are arranged in different cuttvesOn the wing, conical tooth has positive top rake, disk shearing tooth to have plus caster angle.Conical tooth and disk shearing tooth have heightDegree difference L is more than M, and its difference is between 0 to 2 millimeters.Disk shearing tooth and cutting face be provided with back rake angle andAngle of heel, the angle of the back rake angle of disk shearing tooth changes between-17 °～+35 °, and disk shears flankThe angle at inclination angle changes between-17 °～+17 °；Conical tooth is provided with top rake；The angle of top rake existsChange between 0～+17 °.
Figure 16 and Figure 17 describes in Fig. 8 and Figure 11 in embodiment front row on wing 60 and wing 132Disk shearing tooth, heel row is conical tooth, the drill bit that disk shearing tooth and conical tooth are formed at same wing,The working method on drilling process cutting stratum and the well-bottom trace schematic diagram of formation.Disk shearing tooth is at wingThere is plus caster angle at front row, and conical tooth is that rear toothrow has top rake；Disk shearing tooth and cutting face are provided with hypsokinesisAngle and angle of heel, the angle of the back rake angle of disk shearing tooth changes between-17 °～+35 °, and disk is shearedThe angle at flank inclination angle is-17 °～+17 ° changes；The scope of the top rake of heel row conical tooth ± 8 degree itBetween；Disk shearing tooth and conical tooth have cutting-in difference N, and N value is between 0～2 millimeter.
Figure 18 and Figure 19 describes in Fig. 6, Fig. 8, Fig. 9 and Figure 11 wing 13, wing 53 in embodimentWing 83 and wing 132 are the wing of only conical tooth on drill bit；After only conical tooth wing increasesRow's conical tooth, front-seat conical tooth has positive top rake, heel row conical tooth to have negative top rake；By Figure 18 and Figure 19Describe the wing 113 only having conical tooth described in Figure 11, including front-seat conical tooth 118, heel row conical tooth 119,Same wing arranges the drill bit of formation；Reflection only has the wing of conical tooth on drilling process cutting stratumThe well-bottom trace schematic diagram of working method and formation.Front-seat conical tooth cutting-in L1 and heel row conical tooth cutting-in L2Difference between 0～2 millimeter.
In conical tooth of the present invention and disk shearing tooth, there is polycrystalline superabrasive materials in the form, polycrystalline superabrasive materials in the form bagInclude diamond and natural diamond particles, diamond and natural diamond monocrystalline and the mixing of microgranule,Containing polycrystalline superabrasive materials in the form such as cubic boron nitrides；In instances, polycrystalline superabrasive materials in the form and carbide matrixThe catalyst material that body uses in the technical process of high temp/high pressure (" HTHP "), it is possible to formed desiredThe conical tooth of polycrystalline superabrasive materials in the form and the disk shearing tooth of polycrystalline superabrasive materials in the form.
In the technical process of the high temp/high pressure (" HTHP ") of above-mentioned formation polycrystalline superabrasive materials in the form, can addThe forcing press of the high temp/high pressure of heat completes.General high temperature reaches under the temperature conditions of 1420 DEG C, and high pressure about existsUnder the conditions of high pressure between 5.5GPa～7.8GPa；Although the exact operations of high temp/high pressure (HTHP) techniqueConcrete composition according to the various materials being currently in use and quantity are changed by parameter.At high temp/high pressurePressure in forcing press can maintain under the conditions of the most constant high temp/high pressure (" HTHP ") setAbout within the time of 50 seconds～21 minutes, it is possible to form the conical tooth of polycrystalline superabrasive materials in the form and polycrystalline is super grindsThe disk shearing tooth of mill material.
During the bit operation of the present invention, by impact press-in and the scraping fortune of combination tooth wing drill bit of riflerMoving and combine, gear wheel cutting tooth realizes shaft bottom precrushing, it is ensured that fixing cutting tooth effective wedging rock, eliminatesDrill bit, at some special formation generation stick-slip phenomenons, reduces the shock loading of fixing cutting tooth, reduces fixing cuttingCut the probability that tooth impact is damaged, improve bit cutting efficiency and rate of penetration；Meanwhile, combination tooth wing drill bitCloth toothing, the cutting power at the hybrid drilling bit wing center of reinforcement and the ability of adaptation, enhanceHybrid drilling bit is the ability of fast drilling in bad ground and interlayer stratum, is conducive to improving hybridThe rate of penetration of drilling bit.
Technical scheme is not limited to the restriction of above-mentioned specific embodiment, every technology according to the present inventionThe technology deformation that scheme is made, within each falling within protection scope of the present invention.