CN206769814U - A kind of big landwaste, low-power consumption diamond bit - Google Patents
A kind of big landwaste, low-power consumption diamond bit Download PDFInfo
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- CN206769814U CN206769814U CN201720556725.8U CN201720556725U CN206769814U CN 206769814 U CN206769814 U CN 206769814U CN 201720556725 U CN201720556725 U CN 201720556725U CN 206769814 U CN206769814 U CN 206769814U
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Abstract
A kind of big landwaste, low-power consumption diamond bit, including water channel, water hole or nozzle between bit body, the fixing wing for extending from bit body, wing etc., first group of cutting element is provided with the front end of fixing wing, there is at least one annular blank tape around bit central on drill bit, first group of cutting element is not provided with annular blank region, it is characterised in that：There are a pair of the independent wings at least separated by annular blank tape in annular blank tape both sides, and the circumferential position of independent wing mutually staggers.The size of broken landwaste can be significantly increased, drill bit broken rock power consumption is reduced, improves the rate of penetration and efficiency of breaking rock of drill bit, while strengthens drill bit drilling stability.
Description
Technical field
The invention belongs to oil-gas drilling engineering, mine engineering, building foundation engineering construction, geological drilling, tunnel
The technical equipment such as engineering, the hydrology and no-dig technique field, and in particular to a kind of big landwaste, low-power consumption diamond bit.
Background technology
Diamond bit is wherein to fractured rock, the rock crushing tool of formation pit shaft in drilling engineering, according to its cutting
The difference of element, mainly include PDC drill bit and diamond-impregnated bit.
PDC drill bit by high rigidity, it is wear-resisting, from sharp composite polycrystal-diamond（Abbreviation PDC teeth or cutting tooth）As
Cutting element is sheared and fractured rock.PDC drill bit rate of penetration in soft-medium hard formation is high, long lifespan, and drilling cost is low,
Therefore it is used widely in the drilling of Oil/gas Well.
Although PDC teeth hardness is high, the limitation of impact resistance and heat wear resistance ability, PDC drill bit is in hard formation, Gao Yan
Mill property stratum, serious heterogeneity stratum（It is soft or hard staggeredly interlayer, containing boulder bed etc.）During drilling, it is easy to cause the quick of composite sheet
Wear out failure, and damage is collapsed in the impact that one of most typical failure mode is exactly composite sheet diamond layer, the damage that collapses of composite sheet makes brill
The stock-removing efficiency and working life of head substantially reduce.It is the impulsive force from bottom rock that composite sheet, which collapses the main reason for damage,
In addition to the impact that rock heterogeneity is brought, in the more common scenario, vibration of the impulsive force that cutting tooth is born from drill bit,
Particularly oscillation crosswise.Generally, it is that cutting speed is higher on drill bit to be easiest to that composite sheet occurs to collapse the position of damage on drill bit
Radial zone beyond crown and crown.Can be in wing body after the excessive wear of cutting tooth in local radial region on drill bit
Upper generation annular groove, once occurring, the cutting power of drill bit is i.e. basic to be lost annular groove.
In addition to PDC drill bit, diamond-impregnated bit is also a kind of important drill bit species, and this drill bit is contained in pregnant
A large amount of diamond molecules in matrix-type wing body or cutting tooth（That is diamond micro-cutting sword）The basic cutting edge formed
Cutting element is formed, the broken rock principle of drill bit and the Principle of Grinding and Cutting of emery wheel are similar, i.e., the diamond particle exposed to bit face
Cut bottom rock in a manner of grinding or micro-cutting, and along with gradual " blunt " of diamond particle, come off and its branch
The continuous abrasion of timbering material, new diamond abrasive grain constantly go out sword and worked on.This " grinding " of diamond-impregnated bit is former
Reason, the application for determining it are mainly that high rigidity, strong abrasiveness etc. are not suitable for using the difficult brill of PDC drill bit is even extremely difficult to bore ground
Layer, and typically relatively good rock breaking efficiency is can be only achieved at high speed.Matrix-type wing body is contained in by diamond particle is pregnant
Formed in cutting element be referred to as the impregnated body of wing or impregnated piece of wing（Referred to as impregnated body or impregnated piece）, it is pregnant to be contained in cutting tooth
Formed in cutting element then be referred to as impregnated cutting tooth（Abbreviation impregnated tooth）.Impregnated body itself constitutes diamond-impregnated bit
A part for wing body, belong to the basic cutting structure of impregnated bit, and impregnated tooth is usually then to be fixedly arranged on the impregnated body of wing
Attached cutting structure.The mode that impregnated tooth is fixedly arranged on the impregnated body of wing typically has vertical, horizontal and vertical three kinds of sleeping combined type,
Generally use is sintered and consolidation is realized in soldering.Impregnated tooth is set up on the impregnated body of wing, both having contributed to, which improves impregnated bit, is boring
Adaptability during soft formation is met, can more dramatically increase the working life of diamond-impregnated bit cutting structure.Impregnated body, impregnated tooth
And the various combinations of impregnated body and impregnated tooth, it can form the impregnated cutting element of drill bit, all impregnated cuttings on drill bit
Element constitutes the impregnated cutting structure of drill bit.In the case where hardly possible bores even extremely difficult brill formation condition, other various types of drill bits are all deposited
Tooth life is short the problem of, and the wearability of impregnated bit cutting element is extremely strong, can reach relatively long working life.By
It is often very high in the working speed of impregnated bit, so, the kinetic stability of drill bit in the course of the work is kept, reduces as far as possible and bores
The vibration of head（Particularly oscillation crosswise）, for ensureing that the working life of drill bit is particularly significant.
Crown profile shape is the very important architectural feature of diamond bit, and the crown profile line of drill bit is also referred to as cutting wheel
Profile, can distributing position feature of the macroscopic view reflection cutting element on drill bit, also can directly reflect the shaft bottom that bit cutting goes out
Basic configuration feature.The crown profile line of diamond bit is typically a smooth curve, parabolically shape, including inner cone,
Crown（Nose）, outer cone, shoulder and the part of gauge five.When external load makes drill bit have the trend that occurred level translates, drill bit
The inner cone of central area or the palisades of outer cone apply to move horizontally active force in opposite direction with it to drill bit, to suppress drill bit
Transverse shifting, be beneficial to improve stability of bit.
Determined by its broken rock principle, all kinds of diamond bits have a common weakness, i.e., are crushed in drilling process
The landwaste size formed after bottom rock is very tiny, and the landwaste of wherein diamond-impregnated bit is even more superfine, substantially in powdered.
This weakness limits the application of diamond bit to a certain extent.Because subterranean strata is complicated and changeable, in drilling process often
Often need to analyze, judge the lithological information on stratum by the landwaste returned on underground, excessively tiny landwaste will make this analysis
It is severely impacted with the accuracy of judgement.
Assuming that there is a section plane by certain point in drill axis and drill bit on drill bit（Referred to as cross the axle of the point
Line plane or axial plane）.When being rotated under conditions of drill bit is zero in rate of penetration around own axes, the contour line of cutting element with
Section plane or axial plane are crossed to form intersection, and the intersection is the axial plane contour line of cutting element, by the axial plane of all cutting elements
Contour line pools together the shaft bottom coverage diagram to form drill bit, in the coverage diagram of shaft bottom, can be one and all cutting units
The tangent envelope curve of axial plane contour line, be referred to as bit cutting contour line, bit cutting contour line reflects drill bit and drilled out
Shaft bottom basic configuration feature.Drill body contour line is the position curve for reflecting drill body in the coverage diagram of shaft bottom, and it is
One key character curve of diamond bit.The drill bit cloth flank of tooth refers to using drill axis as pivot, drill body profile
Line is the curved surface intersected after radius of turn rotates a circle with drill body.
In PDC drill bit, contour line and the section plane or axial plane of PDC cutting tooths are crossed to form intersection, and the intersection is PDC
The axial plane contour line of cutting tooth, the axial plane contour line of all PDC cutting tooths is pooled together to the shaft bottom covering to form PDC drill bit
Figure, does an envelope curve tangent with the axial plane contour line of all PDC cutting tooths, is the cutting contour line of PDC drill bit.If bore
Head rotates under conditions of axial location is constant around own axes, then for a certain wing body, its leading flank and its cloth flank of tooth
Intersection the rotation with drill bit is scanned to form a surface of revolution using drill bit central axis as axis, the surface of revolution with
The intersection of axial plane is the body profiles line of wing.
In diamond-impregnated bit, if cutting element is all the impregnated body of wing（Watermelon peel formula impregnated bit）, by knife
The impregnated body contour line of the wing is crossed to form intersection with section plane or axial plane, and the intersection is the axial plane contour line of impregnated cutting unit,
The impregnated body axial plane contour line of all wings is pooled together to the shaft bottom coverage diagram to form drill bit, can be with the coverage diagram of shaft bottom
An axial plane contour line envelope curve with the impregnated body of all wings is done, is referred to as impregnated bit cutting contour line, it is so impregnated
The cutting contour line and drill body contour line of drill bit are basically identical, are same curves；It is impregnated that if cutting unit includes wing
Body, impregnated piece（Impregnated tooth）, impregnated tooth is usually then the attached cutting structure being fixedly arranged on the impregnated body of wing, and impregnated tooth is fixedly arranged at
Mode on the impregnated body of wing typically has vertical, horizontal and vertical three kinds of sleeping combined type, and consolidation is realized in generally use sintering and soldering,
The impregnated body of wing, the contour line of impregnated tooth and section plane or axial plane are crossed to form intersection, the intersection is impregnated cutting unit
Axial plane contour line, the axial plane contour line of the impregnated body of all wings, impregnated tooth is pooled together to be formed drill bit shaft bottom covering
Figure, in the coverage diagram of shaft bottom, can do an envelope curve tangent with the axial plane contour line of all impregnated tooths, be referred to as impregnated
Bit cutting contour line, the envelope curve of all impregnated bodies of wing is done, be referred to as the body profiles line of impregnated bit.
The content of the invention
It is an object of the invention to：A kind of big landwaste, low-power consumption diamond bit are provided, broken landwaste can be significantly increased
Size, drill bit broken rock power consumption is reduced, improves the rate of penetration and efficiency of breaking rock of drill bit, while strengthen drill bit drilling stability.
The object of the invention is realized by following technical proposals：
A kind of big landwaste, low-power consumption diamond bit, including bit body, the fixing wing for extending from bit body, wing it
Between water channel, water hole or nozzle etc., first group of cutting element is provided with the front end of fixing wing, has at least one on drill bit
The individual annular blank tape around bit central, first group of cutting element is not provided with annular blank region, it is characterised in that：
There is a pair of the independent wings at least separated by annular blank tape, and the circumferential position of independent wing in annular blank tape both sides
Mutually stagger.
Independent wing：Under normal conditions, wing local subsidence forms groove, when the depth of groove is not up to wing root
Portion, now wing on the inside of groove, two parts in outside still fall within same wing body.But when the depth of wing groove reaches
When the limit, i.e. groove floor overlap with water channel rooved face（Namely wing local subsidence flushes to wing root with water channel rooved face
When）, just each become an independent wing positioned at two parts of groove inner side, the wing in outside, equivalent to longer knife
The wing divide into a pair of short sword wings independent of each other by annular blank tape.In addition, it is not up to wing root for the depth of groove floor
The wing in portion, can be using a side of groove as parting surface, or a parting surface is selected between two sides, with parting surface
Wing is divided into two parts for boundary --- a pair of independent short sword wings.Because no longer in week between a pair of independent short sword wings
There is mutual geometrical-restriction relation to position, blade contour etc., so can respective independent design.When a pair of independent cutters
When wing circumferential position not exclusively staggers, the U-shaped space of a closing will be formed（Such as Figure 10,11 marks 241）, when a pair pairs of vertical cutters
When wing circumferential position staggers completely, the U-shaped recess space of original relatively closing is transformed into open L-type space（Such as Figure 10,12 marks
Note 242）.
Wing side：The face that independent wing is separated by annular blank tape, as shown in Fig. 1 marks 27.Independent wing is close
The face of annular blank tape external boundary is wing medial surface, such as Fig. 1 marks 271.Independent wing is close to annular blank tape inner boundary
Face is wing lateral surface, as shown in Fig. 1 marks 272.
Anterior angle：The fixed cutter anchor point for crossing annular blank region does a locating shaft parallel with drill axis
Line, the angle theta of fixed cutting tooth axis and orientation axis is the anterior angle of cutting element, as shown in figure 13, and provides anterior angle with boring
Head direction of rotation is unanimously for just, on the contrary is negative.
Tooth with curved surface crown：The main tooth shape character of this tooth is that the working end of tooth has the curved surface of evagination
Crown, tooth have higher pressure-resistant, impact strength.In such tooth, the diamond with curved surface bizet can be divided into again
Composite teeth and the hard-metal insert with curved surface bizet.In the diamond composite teeth with curved surface bizet, there is taper crown
Diamond composite teeth be a kind of typical structure, such as diamond composite conic pointed tooth.Hard-metal insert with curved surface bizet
Mainly there are conical tooth, chisel teeth, scoop chisel insert, hemi-spherical ended shape insert etc..
In this patent, the benefit of independent wing is more flexible and changeable for the design of the shape, size of fixing wing, is drill bit
Personalized designs provide basis, and do not have notch feature in bit body, can thoroughly avoid landwaste from being stuck in the generation of groove phenomenon.And
When drill bit works in shaft bottom, annular phacolith is formed in the sunken regions of blank tape（Dashed region in Fig. 2）, phacolith both sides originally by
To the constraint of rock released, therefore the intensity of phacolith itself is remarkably decreased, and equivalent to isolated " wall ", is either adopted
Cut with crushing, scraping（Shearing）, plow or impact grinding mode, the comminution energy conssumption needed for it will all be greatly lowered, Er Qieqi
Crumbling method tends to the broken of volumetric, so as to improve the efficiency of breaking rock of drill bit.
Alternatively, pedestal is set in annular blank region, second group of cutting element is set on pedestal, and second group is cut
It is fixed cutter to cut element, and/or the motion cutting element of relative motion can occur with drill body, moves cutting element
It is upper that there are one or more cutting tooths.
In such scheme, second group of cutting element is fixed cutting tooth, and/or relative motion can occur with drill body
Cutting element is moved, moving on cutting element has one or more cutting tooths, and raised rock is crushed using dynamic and static complex method
Ridge, comminution energy conssumption is reduced, so as to improve the drilling efficiency of drill bit.Fixed cutter includes PDC composite sheets, hard alloy or gold
Hard rock composite conic tooth, chisel teeth, and impregnated diamond cutter（Including impregnated wing body, impregnated perpendicular tooth, impregnated sleeping
Tooth）, moving cutting element includes gear wheel, drift, impact teeth.
Alternatively, have the circumferential position of at least one pair of independent wing endless in the both sides of at least one annular blank tape
It is completely wrong to open, form U-shaped recess space.
In such scheme, the circumferential position of a pair of independent a pair of independent wings of wing not exclusively staggers, by increasing capacitance it is possible to increase chip removal
The circumferential space of groove, can effectively solve the generation of the vortex phenomenon caused by hydraulic factors.
Alternatively, the independent wing at least separated in the presence of one group of annular blank tape staggers completely, forms L-type space.
In such scheme, the adjacent two independent wing separated by annular blank tape can not form U-shaped space, can be effective
The phenomenon for avoiding landwaste from being stuck in groove is present.
Alternatively, the first group of cutting element set on wing is partly or entirely impregnated cutting element.
In such scheme, such drill bit can be crept into high abrasive, high rigidity in stratum, widen the drill bit scope of application.
Alternatively, one or several gear wheels are provided with drill bit, the tooth overlay area of wherein at least 1 gear wheel exists
In annular blank region, and the tooth overlay area of at least one gear wheel includes the region beyond part-toroidal blank tape.
In such scheme, a preferably at least gear wheel upper part or whole gear ring positions correspond each circumferential recess area
Domain, gear wheel cutting tooth are crushed raised annular phacolith in a manner of alternating action, are beneficial to the cooling of cutting tooth, improve cutting tooth
Life-span, while replace sliding to roll, torque-on-bit is reduced, improves drill bit drilling stability, the drill bit particularly in directional well
Drop turn round effect become apparent.
Alternatively, at least one chip area for being provided with corresponding to the wing or water channel groove of second group of cutting element is
Enclosed construction.
In such scheme, increase the intensity of drill bit wing, strengthen the reliability of drill bit, exist in drill bit by impact or
Volumetric fracture caused by the mode of person's extruding, cutting grain is larger, it is possible to drill bit holding is allowed, using this closed chip area
Effectively reduce the generation of drill bit holding phenomenon.
Alternatively, the depth of at least one water channel groove for being provided with second group of cutting element, which is more than, is not provided with second group
The water channel groove of cutting element.
In such scheme, the presence of deep water road groove, big landwaste holding can be effectively reduced at the gauge of drill bit and the borehole wall,
Big landwaste is smoothly returned on well.
Alternatively, annular blank region fixed cutter is the tooth with curved surface crown, and anterior angle θ value models
Enclose for 0o≤θ≤90o。
In such scheme, the anterior angle span of fixed cutter is limited within the specific limits, according to different stratum
Condition and drilling condition select different anterior angles to carry out plow rock, so as to widen the use range of drill bit.
Alternatively, in drill bit at least provided with one across the prolate water hole of annular blank tape and/or prolate nozzle, water
Hole exits have inside and outside annular blank tape to be exposed.
Such scheme, in such scheme, the presence of raised phacolith can cause the region beyond drill bit phacolith waterpower occur not
Even without the situation of mud, prolate water hole penetrates annular blank tape in drill bit radial direction, can be beneficial to drill bit phacolith foot
The cooling of cutting tooth in addition quickly leaves shaft bottom with landwaste.
Beneficial effects of the present invention：
1st, when drill bit works in shaft bottom, annular phacolith is formed in annular blank region, phacolith loses original support, made
The stress for obtaining its both sides is released, and causes the intensity of phacolith to decline, so being that required comminution energy conssumption will be big in broken phacolith
Width declines, and saves energy, improves the efficiency of breaking rock of drill bit, and the cutting element beyond annular blank region will be assigned to more
The pressure of the drill, helps to lift the ability on drill bit wedging stratum, obtains formation information by cuttings analysis, judges geologic horizon, raised
Phacolith suppress drill bit transverse shifting, so as to reduce the oscillation crosswise of drill bit, improve the stability of drill bit, effectively reduce drill bit
The impact of cutting tooth and eccentric wear failure.
If the 2, second group of cutting element is arranged within wing annular groove, the landwaste after annular blank tape phacolith fragmentation holds
Easy congestion, so as to cause mud drum in groove, reduces the efficiency of breaking rock of drill bit in wing groove.
3rd, second group of cutting element be using motion cutting structure, benefit be using impact or quasi- static pressure by the way of crush it is convex
The phacolith risen, comminution energy conssumption is reduced, so as to improve the drilling efficiency of drill bit.
4th, the benefit of independent wing is more flexible and changeable for the design of the shape, size of fixing wing, is that drill bit is personalized
Design provides basis, and does not have notch feature in bit body, can thoroughly avoid landwaste from being stuck in the generation of groove phenomenon.
5th, prolate water hole penetrates annular blank tape, the cutting tooth that can be beneficial to beyond drill bit phacolith in drill bit radial direction
Cooling and landwaste quickly leave shaft bottom.
6th, the benefit in deep water road is can to effectively reduce big landwaste holding at the gauge of drill bit and the borehole wall so that big landwaste
Smoothly it can return on well.
7th, the benefit of the chip area of enclosed construction is the intensity of increase drill bit wing, strengthens the reliability of drill bit, is boring
Exist in head by volumetric fracture caused by the mode of impact or extruding, cutting grain is larger, it is possible to allow drill bit holding, adopt
The generation of drill bit holding phenomenon is effectively reduced with this closed chip area.
Brief description of the drawings
Fig. 1 is diamond bit schematic diagram of the present invention
Fig. 2 is diamond bit top view
Fig. 3 is diamond bit coverage diagram of the present invention
Fig. 4 is the diamond bit schematic diagram of continuous gauge
Fig. 5 is Fig. 4 top view
Fig. 6 is the gear wheel-PDC composite drill bit schematic diagrames with independent wing
Fig. 7 is the reeded impregnated bit coverage diagram of tool
Fig. 8 is the diamond bit coverage diagram with impact teeth
Fig. 9 is the diamond bit schematic diagram of the continuous gauge of deep water road chip area sectional view
Figure 10 is the diamond bit top view with the independent wing for not exclusively staggering and staggering completely
Figure 11 is the sectional view A-A of independent wing of not exclusively staggering in Figure 10
Figure 12 is the sectional view B-B of independent wing of staggering completely in Figure 10
Figure 13 is fixed cutter anterior angle schematic diagram in annular blank region
Figure 14 is that the cutting element of annular white space is the drill bit top view of gear wheel
Identified in figure：
1- bit bodys；
2- fixing wings；21 independent wings；211- staggers independent wing completely；The endless wholes of 212- stagger independent wing；
22 first groups of cutting elements；221-PDC teeth；The impregnated cutting elements of 222-；The impregnated perpendicular teeth of 2221-；The impregnated sleeping teeth of 2221-；23- is protected
Footpath block；The continuous gauges of 231-；241-U types space；242-L types space；25- wing contour lines；The 6 wing cloth flank of tooth；27- knives
Flank face；271- wing medial surfaces；272- wing lateral surfaces
3- water channel grooves；31- deep water road groove；The closed chip areas of 32-；
Second group of cutting element of 4-；41- fixed cutters；411-PDC teeth；412- conical tooths；413- fractures tooth；42-
Move cutting element；421- gear wheels；4211- gear wheel teeth；422- drifts；423- impact teeths；
5- pedestals；
6- hydrophthalmias or nozzle；61- prolates water hole or nozzle；
7- rocks；71- phacoliths；
8- annular blank region；81- annular blank tape inner boundaries；82- annular blank tape external boundaries.
Embodiment
Following non-limiting examples are used to illustrate the present invention.
As shown in Figure 1, 2, 3, a kind of diamond bit with independent wing, including bit body 1, extend from bit body
Water channel 3, water hole or nozzle 6 between fixing wing 2, wing etc., first group of cutting member is provided with the front end of fixing wing
Part 21, there is at least one annular blank tape 8 around bit central on drill bit, first is not provided with annular blank region
Group cutting element, it is characterised in that：There are a pair of the independent cutters at least separated by annular blank tape in the annular both sides of blank tape 8
The wing 21, and the circumferential position of independent wing mutually staggers.
Preferably, setting pedestal 5 in the annular region of blank tape 8, second group of cutting element 4 is provided with pedestal, and
Second group of cutting element is fixed cutter 41, and/or the motion cutting element 42 of relative motion can occur with drill body,
There are one or more cutting tooths on motion cutting element.As shown in Fig. 1,2,8,10.
Stagger completely preferably, the independent wing that one group of annular blank tape separates at least be present, form L-type space.
As shown in Fig. 1,2,4,5,10,12.
Preferably, the independent wing and circumferential position that are at least separated in the presence of one group of annular blank tape not exclusively stagger,
Form U-shaped space.As shown in the figure shown in 10,11.
Preferably, being provided with one or several gear wheels 421 on drill bit 1, the tooth 4211 of wherein at least 1 gear wheel covers
Cover area is in annular blank tape in 8 regions, and the overlay area of tooth 4211 of at least one gear wheel includes part-toroidal blank tape
Region beyond 8, as shown in Figure 6.
Preferably, the first group of cutting element 22 set on wing is partly or entirely impregnated cutting element 222, such as scheme
Shown in 7.
Preferably, at least one is provided with the chip area corresponding to the wing or water channel groove of second group of cutting element 4
For enclosed construction 32, the gauge block on former and later two wings of water channel groove is combined into one, and turns into continuous gauge block 231, such as Fig. 4,5
It is shown.
Preferably, the depth of at least one water channel groove for being provided with second group of cutting element, which is more than, is not provided with second group
The water channel groove 31 of cutting element, as shown in Figure 9.
Preferably, it is the tooth with curved surface crown for second group of cutting element, its anterior angle θ spans are 0o≤θ
≤90o, as shown in figure 13.
Preferably, at least provided with one across the circle water hole of annular blank tape or flat water hole 61 in drill bit, water hole goes out
Mouth has inside and outside annular blank tape and exposed, and plug blocks water liquid stream during avoiding phacolith too high, as shown in Figure 2.
Preferably, second group of cutting element is gear wheel 421 on drill bit, and cone offset, generation move wheelbase S, so that
Obtain gear wheel tooth and produce sliding in broken phacolith, be advantageous to crush phacolith by fractureing or extruding, realize volumetric fracture, such as
Shown in Figure 14.
Preferably, the medial surface 271 and/or lateral surface 272 in the annular blank region independent cutter wing are provided with pedestal
5, and be provided with fixed cutter 413 on pedestal and phacolith is destroyed by way of fractureing or extruding, as shown in Figure 1, 2.
Preferably, in annular blank region, the cloth flank of tooth of pedestal 5 is concordant with water channel 3, and is set in the pedestal cloth flank of tooth
Second group of cutting element 4, as shown in Figure 4,5.
Preferably, the wing uneven distribution of drill bit, and is set in the larger water channel of angle between adjacent blades
Two groups of cutting tooths 42, on the one hand increase the horizontal out-of-balance force of drill bit, promote the phacolith at blank tape that fracture occurs or destroys, together
When phacolith can also crushed in the case where second group of cutting tooth 42 acts on large scale landwaste be not easy the congestion in water channel, such as Fig. 4,5 institutes
Show.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (10)
1. between a kind of big landwaste, low-power consumption diamond bit, including bit body, the fixing wing for extending from bit body, wing
Water channel, water hole or nozzle etc., first group of cutting element is provided with the front end of fixing wing, is had on drill bit at least one
Around the annular blank tape of bit central, first group of cutting element is not provided with annular blank region, it is characterised in that：
Annular blank tape both sides have a pair of the independent wings at least separated by annular blank tape, and the circumferential position phase of independent wing
Mutually stagger.
2. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：In annular blank zone
Pedestal is set in domain, second group of cutting element is provided with pedestal, and second group of cutting element is fixed cutter, and/or
The motion cutting element of relative motion can occur with drill body, moving on cutting element has one or more cutting tooths.
3. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：One group of ring at least be present
The independent wing and circumferential position that shape blank tape separates stagger completely, form L-type space.
4. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：One group of ring at least be present
The independent wing and circumferential position that shape blank tape separates not exclusively stagger, and form U-shaped space.
5. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：Set on wing
One group of cutting element is partly or entirely impregnated cutting element.
6. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：One is provided with drill bit
Individual or several gear wheels, the tooth overlay area of wherein at least 1 gear wheel is in annular blank region, and at least one gear wheel
Tooth overlay area include part-toroidal blank tape beyond region.
7. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：At least one is set
It is enclosed construction to have the chip area corresponding to the wing or water channel groove of second group of cutting element.
8. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：At least one is set
The depth for having the water channel groove of second group of cutting element is more than the water channel groove for being not provided with second group of cutting element.
9. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：Annular blank region
Fixed cutter is the tooth with curved surface crown, and anterior angle θ spans are 0o≤θ≤90o。
10. a kind of big landwaste, low-power consumption diamond bit as claimed in claim 1, it is characterised in that：In drill bit at least provided with
There is one across the prolate water hole of annular blank tape and/or prolate nozzle, water hole is exported inside and outside annular blank tape
Have and expose.
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| CN201720556725.8U CN206769814U (en) | 2017-05-19 | 2017-05-19 | A kind of big landwaste, low-power consumption diamond bit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681122A (en) * | 2019-03-03 | 2019-04-26 | 兰州城市学院 | A kind of two rank step scraper |
| CN110145241A (en) * | 2018-02-10 | 2019-08-20 | 西南石油大学 | A kind of low torque diamond bit suitable for hard formation drilling |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
-
2017
- 2017-05-19 CN CN201720556725.8U patent/CN206769814U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145241A (en) * | 2018-02-10 | 2019-08-20 | 西南石油大学 | A kind of low torque diamond bit suitable for hard formation drilling |
| CN109681122A (en) * | 2019-03-03 | 2019-04-26 | 兰州城市学院 | A kind of two rank step scraper |
| CN111502551A (en) * | 2020-04-20 | 2020-08-07 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
| CN111502551B (en) * | 2020-04-20 | 2021-07-30 | 中石化江钻石油机械有限公司 | Matrix and wing mixed drill bit and preparation method thereof |
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