CN102434105A - Composite bit with rotary cut rock-breaking function - Google Patents
Composite bit with rotary cut rock-breaking function Download PDFInfo
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- CN102434105A CN102434105A CN2011103900215A CN201110390021A CN102434105A CN 102434105 A CN102434105 A CN 102434105A CN 2011103900215 A CN2011103900215 A CN 2011103900215A CN 201110390021 A CN201110390021 A CN 201110390021A CN 102434105 A CN102434105 A CN 102434105A
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Abstract
The invention discloses a composite bit with a rotary cut rock-breaking function, which comprises the composition of a rotary cut bit, a polycrystalline diamond compact (PDC) bit and a roller cone bit. The composite bit with the rotary cut rock-breaking function comprises a main body (1), a rotary cut bit roller cone (2), rotary cut bit cutting teeth (3), a PDC bit knife wing (4), PDC cutting teeth (5), an oil storage capsule (6) and a spray nozzle (7). The bit main body (1) comprises a roller cone shaft neck, a wiper block, a high-pressure mud channel and connecting screw threads. The composite bit with the rotary cut rock-breaking function has the advantages that the rotary cut bit cutting teeth in the composite bit impact, crush and cut rocks in rotary cut mode, central rock breaking efficiency is high, mechanical drilling speed is high, the composite bit has better dynamics performance, and the abrasion is even. Simultaneously, a bit bearing structure is improved, service life of the bit is prolonged while improvement of the rock-breaking efficiency is guaranteed, and the gauge protection effect is good. Different composite structures in the composite bit can achieve the effects of high central rock breaking efficiency, high mechanical drilling speed and good gauge protection effect.
Description
Technical field
The invention belongs to technical equipment fields such as oil-gas drilling engineering, mining, geological drilling, construction work, construction of tunnel, shield structure and non-excavation, relate to composite drill bit with the broken rock function of rotary-cut.
Background technology
Drill bit is directly to contact with rock in the drilling process, through the instrument of effect fractured rocks such as cutting, punching press.Widely used drill bit mainly contains rock bit, PDC drill bit (Polycrystalline Diamond Compact Bits polycrystalline diamond compact bit) in the modern drilling engineering.Now, rock bit and PDC drill bit have all developed into quite high level, but still have some unsurmountable problems.The one, be afraid of reaming and reaming hole, make the rock bit of sealed bearing, particularly the PDC drill bit damages in advance; The 2nd, little to the motion of center, shaft bottom rock, insufficiency of function, the center rock is difficult for broken, influences the rate of penetration of drill bit, and rock bit and PDC bit central cloth tooth are few, easy to wear, also are the main causes that drill bit lost efficacy.Below respectively background of the present invention relevant tricone bit, single-cone rotary drill bit, PDC drill bit, composite drill bit characteristics are analyzed.
Tricone bit: broken rock form formed bottom rock through the tooth on the gear wheel and impacts the granulitization fractured rock for impacting the broken rock of crushing when tricone bit crept into, and formed hole diameter (seeing Figure 15).Because the compressive strength of rock is much larger than shearing resistance and tensile strength, and tricone bit utilizes tooth that the percussion of rock is come brokenly rock, capacity usage ratio is not high.Particularly under high the pressure of the drill situation such as deep drilling, because the effect of highdensity drilling fluid, the cuttings hold-down effect in shaft bottom is obvious, and drill teeth is difficult to the impact grinding rock, so efficiency of breaking rock is relatively low.
The tricone bit bearing life is one of principal element of restriction drilling life of bit; Bearing bears the load that the pressure of the drill causes; Add tricone bit with the broken rock of impulse form, the shock loading that bearing receives is big, and the load amplitude is high; The speed(-)up effect of tricone bit in addition: tricone bit wheel body speed ratio (ratio of gear wheel rotating speed and drill speed during drilling well) is greater than 1; Be drill bit when creeping into the gear wheel rotating speed so the bearing rotating speed is very fast relatively, cause the bearing life of tricone bit shorter greater than the drill bit drilling speed.
From broken rock process of tricone bit and movement locus analysis, tooth on the gear wheel and shaft bottom rock of borehole are less time of contact, and the distance of tooth slippage in the shaft bottom is also less, has influenced drilling efficiency.
Single-cone rotary drill bit: single-cone rotary drill bit then is to rely on tooth to impact, the roll extrusion on stratum with scrape and cut three kinds of mode fractured rocks; Especially scrape that to cut travel direction all different at each position on gear wheel surface; The tooth of promptly different row's numbers in the shaft bottom along the track of different directions; Do the slippage of longer distance and cut the stratum, and form netted shaft bottom track (seeing Figure 16).The characteristics of single-cone rotary drill bit are that the gear wheel rotating speed is low; Bearing size is bigger; Be superior to tricone bit application life, but single-cone rotary drill bit has the shortcoming that can't avoid: repetition fragmentation, chip removal difficulty take place in single-cone rotary drill bit meet the eye on every side easily in its broken rock process of structures shape.Tooth abrasion resistance wretched insufficiency, in case tooth blunt or broken teeth take place, rate of penetration sharply descends.
The PDC drill bit: the broken rock form of PDC drill bit is the scraping rock, in drilling well, geology and even construction work, uses more and more widely, and the ratio of in drilling engineering, using is increasing.Under the ideal operation condition of center line of bit and hole axis coincidence, the movement locus of each cutting teeth was a relatively-stationary concentric circles endless belt (seeing Figure 17) when drill bit crept into.Because its rock breaking mechanism and architectural difference, the PDC drill bit is applicable to higher drilling speed and soft to medium ground.Its deficiency mainly contains following aspect:
(1) downhole condition requires high: if there is foreign matter in the shaft bottom, can causes the PDC drill bit to produce and collapse tooth or thermal friction phenomenon, temperature raises and burns black carcass, even the fusing brazing layer, produces the tooth phenomenon, influences rate of penetration, quickens drill bit and loses efficacy.
(2) serious consequence of PDC tooth inefficacy: compare with rock bit, the load of PDC tooth was accelerated its rate of wear near the inefficacy of the indivedual teeth of PDC drill bit (fall tooth, collapse tooth etc.) can seriously increase, and aggravated drill bit and lost efficacy.
(3) heart portion efficiency of breaking rock is not high: the rate of wear obvious difference of the PDC tooth on the different radial zones of PDC drill bit, and outer shoulder rock cutting ratio is big, and the rate of wear is fast.It is low that the PDC of heart portion toe joint touches efficiency of breaking rock, and it is then slower to wear and tear.
The composite drill bit of rock bit+rock bit: this type composite drill bit is compound with rock bit and rock bit, and accomplish by the rock bit tooth well center and well periphery.Multiple complex form is arranged, and the application scenario comprises that its deficiency mainly contains in reaming, the non-excavation:
(1) the center efficiency of breaking rock is not high: because composite drill bit is made up of rock bit, its broken rock form still is an impact grinding, and capacity usage ratio is not high.The same with rock bit, under high the pressure of the drill situation, because the effect of highdensity drilling fluid, the cuttings hold-down effect in shaft bottom is obvious, and drill teeth is difficult to the impact grinding rock, and efficiency of breaking rock is relatively low, well centre especially, and situation is even more serious.
(2) the peripheral bit wear of well is serious: near this type composite drill bit well periphery, the cone bit cone size is less relatively, but the drilling process rotating speed is high, can quicken the wearing and tearing and the inefficacy of drill bit, causes the drill bit back of the body phenomenon that occurs grinding one's teeth in sleep simultaneously.
(3) center and peripheral gear wheel life-span are not waited, the composite drill bit life-span is not high: rock breaking mechanism and structure based on this type composite drill bit are formed; The center efficiency of breaking rock is not high; And the cone structure size of well periphery is little, rotating speed is high, serious wear; Cause the peripheral rock bit life-span difference of well center and well, be difficult to realize the raising of composite drill bit global optimization and life-span.
The composite drill bit of drag bit+rock bit: when considering roller bit cutting shale with other flowing rock formations, chip hold down is prone to cause the shaft bottom mud drum, and along with the increase of boring dark and bottom pressure and mud balance, the mud drum phenomenon can be more serious.And that drag bit or fixed cutter drill bits are influenced by this is less; During initial stage is compound these two kinds of drill bits are combined; Simply drag bit and rock bit are combined; Cause rate of penetration even be lower than rock bit because the bit wing alar part can wearing and tearing occur too early, this structure does not finally realize commercialization.
The dynamic stability composite drill bit: gear wheel and PDC drill bit are combined, and it designs based on the four blade wing and six wing PDC drill bit structures, and secondary wing position is substituted by the gear wheel of short size.Broken rock is accomplished in creeping into by being positioned at the PDC cutting teeth of operator on the wing of well center, and creeping into by gear wheel and PDC cutting teeth of well periphery accomplished jointly.This structure is carried out drilling speed and is improved that (in shale or other plastic formations, creep into, drilling speed improves 2 ~ 4 times than rock bit.Rate of penetration in the hard abrasive layer is 2 times of gear wheel approximately, 1.5 times of PDC).The broken rock in this composite drill bit center is accomplished by wing, still can not change the low phenomenon of PDC bit central efficiency of breaking rock.Gear wheel in the composite drill bit bores and remains great circle cutting well periphery simultaneously, and bearing size can not be effectively improved in little gear ring cutting well centre, improves bit life.
Summary of the invention
The present invention design has the composite drill bit of the broken rock function of rotary-cut, comprises that rotary-cut drill bit and PDC drill bit are compound, rotary-cut drill bit and rock bit is compound, rotary-cut drill bit and rotary-cut drill bit are compound.Rotary-cut bit cutting tooth in the composite drill bit with the rotary-cut mode impact, crushing, rock cutting, realize broken rock, the center efficiency of breaking rock is high; Rate of penetration is high; Have better dynamic performance, wearing and tearing evenly improve the bit bearing structure simultaneously; Increase drilling life of bit when guaranteeing to improve efficiency of breaking rock, it is effective to protect the footpath; Composite constructions different in the composite drill bit can break the effect that the lithology ability is high, rate of penetration is high, the guarantor footpath is effective in the realization center.
For realizing the object of the invention, adopt following technical scheme:
Composite drill bit with the broken rock function of rotary-cut; Comprise drill main body; It is characterized in that: composite drill bit is at least a compound by in rotary-cut drill bit and rock bit, PDC drill bit, the rotary-cut drill bit; The installed surface of the rotary-cut gear wheel (2) of rotary-cut drill bit is connected with gear wheel axle journal on the drill main body (1), and the work plane of rotary-cut gear wheel is towards the borehole wall and shaft bottom; Gear wheel axle journal plane and drill axis angle are that the scope of wheel body angle
is for
; The scope of axle journal side-play amount
is
, and wherein
is the rotary-cut bit diameter.
Aforementioned rotary-cut gear wheel work plane refers to arrange on the gear wheel taper seat of smear metal tooth, and installed surface is on the direction of the bottom surface of this conical surface.
The design feature of the rotary-cut drill bit in the composite drill bit of the present invention comprises:
(1) a kind of rotary-cut drill bit with the broken rock of rotary-cut mode comprises main body (1), rotary-cut bit cone (2), rotary-cut bit cutting tooth (3).Described rotary-cut drill bit comprises one at least and goes up being connected that the roller axle neck constituted by rotary-cut bit cone (2) and main body (1); Its wheel body angle
scope is
(comprise
and
); Axle journal side-play amount
scope is
(comprise
and
); Wherein, The wheel body angle that rotary-cut bit cone
is corresponding is
; The axle journal side-play amount that wheel
is corresponding is
, and
is the rotary-cut bit diameter.
(2) rotary-cut bit cone: rotary-cut bit cone (2) is the sintered body of steel part, steel body and metal dust; Described rotary-cut bit cone (2) structure has the sintering gear wheel of mill teeth gear wheel, insert cone, steel body and metal dust; Described rotary-cut bit cone (2) number >=1.
(3) rotary-cut bit cutting tooth: rotary-cut bit cutting tooth (3) shape comprises scoop chisel insert, chisel teeth, blunt conical-ended shape insert, hemi-spherical ended shape insert, frustum tooth, cylinder butt tooth, pyramid tooth; Described rotary-cut bit cutting tooth (3) material comprises carbide alloy, polycrystalline diamond complex, TSP, impregnated with diamond, natural diamond, cubic boron nitride, pottery, and the cutting teeth that comprises carbide alloy, diamond or cubic boron nitride; Described rotary-cut bit cutting tooth (3) gear ring number >=1.
Towards the borehole wall or shaft bottom, in the broken rock process, the center efficiency of breaking rock is improved at inner row teeth (being the great circle tooth) center, machinable shaft bottom to rotary-cut drill bit in the composite drill bit of the present invention with gear wheel; Every circle tooth on the gear wheel can both impact crushing cutting shaft bottom and rock of borehole with the rotary-cut mode, and this is the core of rotary-cut drill bit among the present invention.
According to foregoing invention, manufactured experimently out rotary-cut simulation drill bit in September, 2010, and on stand, tested.The shaft bottom profile (seeing Figure 14) that the rotary-cut drill bit gets out is different fully with the shaft bottom profile that tricone bit and PDC drill bit get out.The zone of fracture of tricone bit and PDC drill bit all is concentric circles (seeing Figure 15 and Figure 17), and in the composite drill bit of the present invention the zone of fracture of rotary-cut drill bit be into the helix of chrysanthemum shape.Helix is intensive and disappearance at borehole wall place, has proved that fully each toothrow can both cut the shaft bottom and the borehole wall on the gear wheel, forms hole diameter.Inner row teeth zone of fracture spiral line length, outer rows of teeth zone of fracture helix is short, and the operating load of outer rows of teeth is more even in can making.
The zone of fracture of helix is explained rotary-cut drill bit rock breaking mechanism, and the existing impact granulitization of every toothrow again can rock cutting.Improve the center efficiency of breaking rock simultaneously, thereby improve the drill bit rate of penetration.
Since the broken rock mode characteristics of rotary-cut drill bit, thus various drilling well needs can be adapted to, more more superior than existing rock bit and diamond bit in sidetracking and horizontal well drilling.
According to above analysis; Axle journal deviant
increases; Can increase the radial slippage and circumferentially slippage of cutting teeth, promptly increase the total slippage of cutting teeth in the shaft bottom in the shaft bottom.Wheel body angle
span is:
; Axle journal deviant
span is:
, can realize better that cutting teeth is with the broken rock of rotary-cut mode.Optimize
and
; Can reach and increase the gear wheel cutting teeth in shaft bottom and borehole wall slippage, the purpose of reduction wheel body speed ratio.
The performance characteristics of the rotary-cut drill bit in the composite drill bit of the present invention comprises:
(1) rotary-cut mode is broken rock: in the rotary-cut drill bit drilling process in the composite drill bit of the present invention; Gear wheel axle journal on the main body (1) points to the borehole wall or shaft bottom; Hand over the angle drill axis (i.e.
that squints again with the rotary-cut drill axis;
) time; Rotary-cut bit cone (2) with the rotary-cut mode impact, crushing, rock cutting, realize that broken rock creeps into.Drilling process rotary-cut bit cutting tooth (3) not only rolls along with gear wheel, forms the crushing to the stratum, and through its slipping cutting stratum in the shaft bottom, efficiency of breaking rock is high simultaneously.According to different drilling well demands; Change wheel body angle
, axle journal deviant
and gear wheel (2) size and dimension; Can make the cutting teeth (3) of respectively arranging on the gear wheel (2) all be cut to corresponding well center, well edge and the borehole wall, can also get out the bottom hole pattern of requirement.
(2) the broken lithology in center can be high: in the drilling process; The well center that the rotary-cut drill bit is corresponding is accomplished by the great circle tooth; Because the bull gear diameter is maximum in the rotary-cut bit cutting gear ring; The number of teeth many (the central cloth tooth of comparable tricone bit is many more than 6 times), relative cutting speed is high, can fundamentally solve present tricone bit and the low problem of PDC drill bit heart portion's efficiency of breaking rock.
(3) rate of penetration improves: the structure of rotary-cut drill bit (key parameter comprises wheel body angle
and axle journal deviant
) determined its broken rock form be impact, smash, shear action; Corresponding simultaneously well center efficiency of breaking rock and aggressive height; Avoid the problem of meeting the eye on every side and repeated broken phenomenon; Be beneficial to chip removal, improve the drill bit rate of penetration.
(4) better dynamic performance: with the broken petrofacies ratio of rock bit impulse form, the broken rock form of rotary-cut drill bit for impacts, smash, shear action, the shock loading that continuous shear action receives drill bit is little, the reduction of load amplitude.Simultaneously less than 1, the gear wheel rotating speed was less than the drill bit drilling speed when promptly drill bit crept into for the rotary-cut drill bit wheel body speed ratio ratio of drill speed (the gear wheel rotating speed with), so the bearing rotating speed is relatively slow, the rotary-cut drill vibration impacts and reduces.Compare with common PDC drill bit, rotary-cut drill bit torsional oscillation reduces, and sticking cunning under the slow-speed of revolution and the well spiral phenomenon under the high rotating speed reduce.In the platform experiment result that the present invention carries out, also proved with unidimensional, compare with the rock bit under the working condition, PDC drill bit, the rotary-cut drill bit possesses These characteristics.Better dynamic performance makes the rotary-cut drill bit have the bigger scope of application and better control ability.
(5) the wheel body speed ratio less than 1, bearing life improvement of terms, rotary-cut bit life improve: the wheel body speed ratio of rotary-cut drill bit is less than 1; And the journal size of gear wheel can design greatlyyer than the tricone bit of same specification, having a clear superiority in than rock bit aspect the intensity of axle journal and the drilling life of bit.The rotary-cut drill bit of composite drill bit of the present invention is in broken rock process; The shaft bottom and the borehole wall making a concerted effort of producing promote gear wheel to drill bit and are close to the axle journal plane; This helps improving the bearing seal performance; Improve bearing application life,, thereby realize the raising of rotary-cut bit life based on the significance of bearing life for drill bit.
(6) protect the footpath effect: all cutting gear rings of rotary-cut drill bit can both cut the shaft bottom and the borehole wall, form hole diameter.Shorten if cut that circle odontotripsis of the borehole wall at first, the work that the second circle tooth will be taken over the first lap tooth realizes protecting the footpath, and unlikely boring is more and more littler.If the second circle tooth is wear out failure also, the 3rd circle tooth still can realize protecting the footpath, by that analogy.Can both cut the corresponding hole diameter of rotary-cut drill bit because the rotary-cut drill bit of composite drill bit of the present invention has all gear rings, make it have tricone bit guarantor footpath and sidetracking ability can't be obtained, it is effective to protect the footpath.
Composite drill bit can be realized corresponding purpose according to rotary-cut drill bit, PDC drill bit, composite construction that rock bit is different among the present invention.With two kinds of composite drill bit types wherein is that example is analyzed as follows:
With rotary-cut drill bit among the present invention (well center and well the are peripheral)+secondary wing of PDC drill bit (well is peripheral) composite drill bit is that example is analyzed, and wherein composite drill bit is based on the rotary-cut drill bit structure, and well is trapped among the secondary wing of PDC Bit between the rotary-cut bit cone outward.In the drilling process, creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by rotary-cut drill bit and PDC bit cutting tooth of well periphery accomplished jointly.It has following characteristics:
(1) strengthen peripheral broken rock: in the rotary-cut drill bit drilling process, with the rotary-cut mode impact, crushing, rock cutting, realize creeping into, and peripheral near borehole wall annex, be main with shear action.This type composite drill bit is the secondary wing of PDC Bit between well periphery, rotary-cut bit cone, further strengthens peripheral rock breaking capacity, the peripheral efficiency of breaking rock of raising, improves rate of penetration, reduces peripheral cutting teeth wearing and tearing, increase bit life simultaneously.
(2) protecting the footpath effect further strengthens: can realize that by rotary-cut drill bit drilling process all gear rings can both cut the characteristics of the shaft bottom and the borehole wall; In this type structure; Periphery is born part cutting task through the secondary wing cutting teeth of PDC; When reducing rotary-cut drill bit rotary-cut odontotripsis, the guarantor's footpath ability and the effect of composite drill bit are further strengthened.
(3) drilling process stability is strengthened: composite drill bit is compared with the rotary-cut drill bit, and is wider with shaft bottom and borehole wall Contact Tooth number and increase, contact point distribution, the stability of increase drilling process.
(4) be more suitable for sidetracking, directional well operation: on the basis that stability increases, the cutting of this type composite drill bit is more steady, promptly has better control ability, so applicability is further increased in operations such as sidetracking, directional well.
With rotary-cut drill bit among the present invention (well is peripheral)+PDC drill bit (well center and well are peripheral) composite drill bit is that example is analyzed, and wherein composite drill bit is based on the PDC drill bit structure of the four blade wing or six wings, and the well periphery replaces secondary wing by the rotary-cut drill bit.In the drilling process, creeping into by the PDC cutting teeth that is positioned on the operator wing of well center accomplished, and creeping into by rotary-cut drill bit and PDC bit cutting tooth of well periphery accomplished jointly.It has following characteristics:
(1) improve efficiency of breaking rock and rate of penetration: the rotary-cut drill bit with the rotary-cut mode impact, crushing, rock cutting; PDC bit cutting tooth is scraped the Cutting trajectory that cuts out concentric circles in the shaft bottom; And the zone of fracture of rotary-cut drill bit is into the helix of chrysanthemum shape, and helix is intensive and disappearance at borehole wall place.The staggered effect of two kinds of Cutting trajectories effectively improves the efficiency of breaking rock of drill bit.
(2) reduce PDC thermal friction phenomenon: the alternately cutwork mode of the cutting teeth on the gear wheel helps the cooling of cutting teeth (particularly PDC tooth), avoids or reduced the generation of the thermal wear phenomenon of aggravating of causing wearing and tearing owing to temperature is too high.
(3) the cutting teeth wearing and tearing evenly: PDC bit cutting odontotripsis speed difference is fairly obvious, and the exterior zone cutter-wear rate is obviously faster than heart portion zone tooth.Rotary-cut bit cutting tooth can play special booster action to the easy to wear and failed areas of PDC bit cutting tooth in this structure; This composite drill bit structure realizes the uniform while of wearing and tearing of rotary-cut drill bit and PDC bit cutting tooth, significantly improves the working life of composite drill bit.
(4) improve bit life
As far as the rotary-cut drill bit, because the required the pressure of the drill of rotary-cut drill bit is less relatively, the pressure of the drill fluctuating range is less; The wheel body speed ratio is less than 1; The bearing size improvement of terms, the journal size of gear wheel can design greatlyyer than the tricone bit of same specification; The shaft bottom and the borehole wall making a concerted effort of producing promote gear wheel to drill bit and are close to the axle journal plane, help improving the bearing seal performance, improve bearing application life, thereby combined bits can reach the bearing life higher than tricone bit.
As far as the PDC drill bit, increase cloth tooth density and can increase the working life of drill bit, but also can reduce the drill bit rate of penetration.Among the present invention, cutting teeth alternation when rotary-cut bit cutting tooth has increased cutting teeth quantity.Be that the rotary-cut drill bit can keep the work number of teeth constant or constant basically when increasing total cutting number of teeth.Its effect is when keeping the drill bit rate of penetration, to make the working life of drill bit be able to prolong, and alleviates to prolong bit life in the drill bit design and improve the contradiction between the drilling speed.
According to above research, its structure types of composite drill bit and performance characteristics comprise (but being not limited to) following content among the present invention:
(1) multiple complex form: with the composite drill bit of the broken rock of rotary-cut mode, form among the present invention, comprise main body (1), rotary-cut bit cone (2), rotary-cut bit cutting tooth (3) by rotary-cut drill bit, PDC drill bit, rock bit.It is characterized in that: comprise one in the composite drill bit at least and go up being connected that the roller axle neck constituted by rotary-cut bit cone (2) and main body (1).The composite drill bit complex form comprises the rotary-cut drill bit and the PDC drill bit is compound, rotary-cut drill bit and rock bit is compound, rotary-cut drill bit and rotary-cut drill bit are compound.Utilize the performance characteristics of rotary-cut drill bit, the composite drill bit center is made up of the rotary-cut drill bit, and then in the drilling process, the well center is crept into by rotary-cut bit cutting tooth and accomplished, and can realize the purpose that the broken lithology ability in composite drill bit center is high, rate of penetration is high.Composite drill bit well periphery is made up of rotary-cut drill bit (or rotary-cut drill bit and all the other drill bits), then can realize the purpose in composite drill bit guarantor footpath.
(2) rotary-cut drill bit (well center)+PDC drill bit (well peripheral): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, PDC drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of the PDC drill bit.Peeling drill diameter
Less than composite drill diameter
:
.In the drilling process, creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by PDC bit cutting tooth of well periphery accomplished.Performance characteristics: the broken lithology ability in composite drill bit center is high, rate of penetration is high.
(3) rotary-cut drill bit (well center and well peripheral)+PDC drill bit (well periphery+secondary wing): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, PDC drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein composite drill bit is based on the rotary-cut drill bit structure, and well is trapped among the secondary wing of PDC Bit between the rotary-cut bit cone outward.In the drilling process, creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by rotary-cut drill bit and PDC bit cutting tooth of well periphery accomplished jointly.Performance characteristics: as previously mentioned, the footpath better effects if is strengthened, protected to peripheral rock breaking capacity, drilling process stability increases, is more suitable for sidetracking, directional well operation:
(4) rotary-cut drill bit (well peripheral)+two wing PDC drill bits (the well center is peripheral with well): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, PDC drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein composite drill bit is based on the PDC drill bit structure of the four blade wing, and the well periphery replaces secondary wing by the rotary-cut drill bit.In the drilling process, creeping into by the PDC cutting teeth that is positioned on the operator wing of well center accomplished, and creeping into by rotary-cut drill bit and PDC bit cutting tooth of well periphery accomplished jointly.Performance characteristics: as previously mentioned, improve efficiency of breaking rock and rate of penetration, reduce PDC thermal friction phenomenon, cutting teeth is worn and torn evenly, improve bit life, composite drill bit is applicable to the small size well simultaneously, and the rotary-cut drill bit is realized guarantor footpath effect.
(5) rotary-cut drill bit (well peripheral)+three wing PDC drill bits (the well center is peripheral with well): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, PDC drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein composite drill bit is based on the PDC drill bit structure of six wings, and the well periphery replaces secondary wing by the rotary-cut drill bit.In the drilling process, creeping into by the PDC cutting teeth that is positioned on the operator wing of well center accomplished, and creeping into by rotary-cut drill bit and PDC bit cutting tooth of well periphery accomplished jointly.Performance characteristics: as previously mentioned, improve efficiency of breaking rock and rate of penetration, reduce PDC thermal friction phenomenon, cutting teeth is worn and torn evenly, improve bit life, composite drill bit is applicable to large scale well slightly simultaneously, and the rotary-cut drill bit is realized guarantor footpath effect.
(6) rotary-cut drill bit (well center)+PDC drill bit (well peripheral)+rotary-cut drill bit (well is peripheral): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, PDC drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of PDC and rotary-cut drill bit.The peripheral structure of well is based on the PDC drill bit of the four blade wing or six wings, replaced secondary wing and formed by the rotary-cut drill bit.In the drilling process, creeping into by the rotary-cut bit cutting tooth that is positioned at bit central of well center accomplished, and creeping into by PDC drill bit and the rotary-cut bit cutting tooth that is positioned at the periphery of well periphery accomplished.Performance characteristics: composite drill bit is applicable to large scale well slightly, and the broken lithology ability in center is high, rate of penetration is high, it is effective to protect the footpath.
(7) rotary-cut drill bit (well center)+rock bit (well peripheral): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, rock bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of conventional rock bit (gear wheel number >=1).In the drilling process, creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by conventional rock bit cutting teeth of well periphery accomplished.Performance characteristics: composite drill bit is applicable to large scale well (like non-excavation field etc.), and the broken lithology in center can be high, rate of penetration is high.
(8) rotary-cut drill bit (well peripheral)+rock bit (well center): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit, rock bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein (gear wheel number >=1) is formed by conventional rock bit in the composite drill bit center, and the well periphery is made up of the rotary-cut drill bit.In the drilling process, creeping into by conventional rock bit cutting teeth of well center accomplished, and creeping into by rotary-cut bit cutting tooth of well periphery accomplished.Performance characteristics: composite drill bit is applicable to large scale well (like non-excavation field etc.), and it is effective to protect the footpath.
(9) rotary-cut drill bit (well center and well peripheral)+rotary-cut drill bit (well is peripheral): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit and rotary-cut drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein composite drill bit is based on the rotary-cut drill bit structure, and well is trapped among compound peripheral rotary-cut drill bit between the rotary-cut bit cone outward.In the drilling process, creeping into by center rotary-cut bit cutting tooth of well center accomplished, and creeping into by center rotary-cut drill bit and peripheral rotary-cut bit cutting tooth of well periphery accomplished jointly.Performance characteristics: composite drill bit is applicable to small size well slightly, and the broken lithology ability in center is high, rate of penetration is high, it is effective to protect the footpath.
(10) rotary-cut drill bit (well center)+rotary-cut drill bit (well peripheral): this architectural feature is: described composite drill bit is made up of rotary-cut drill bit and rotary-cut drill bit, comprises one at least and is connected by what roller axle neck on rotary-cut bit cone (2) and the main body (1) constituted.Wherein bit central is made up of the rotary-cut drill bit, and the well periphery also is made up of the rotary-cut drill bit.In the drilling process, creeping into by rotary-cut bit cutting tooth of the center of well and well periphery accomplished.Performance characteristics: composite drill bit is applicable to large scale well slightly, and the broken lithology ability in center is high, rate of penetration is high, it is effective to protect the footpath.
Beneficial effect of the present invention: the rotary-cut bit cutting tooth in the composite drill bit of the present invention is with the broken rock of rotary-cut mode, and the center efficiency of breaking rock is high, and rate of penetration is high; Have better dynamic performance, wearing and tearing are even, the bearing working improvement of terms; Drilling life of bit is long, and it is effective to protect the footpath; Composite drill bit comprises the rotary-cut drill bit and the PDC drill bit is compound, rotary-cut drill bit and rock bit is compound, rotary-cut drill bit and rotary-cut drill bit are compound, different composite constructions can the broken lithology in realization center can be high, rate of penetration is high, protect the effective effect in footpath.
Description of drawings
Description of drawings of the present invention is following:
Fig. 1 comprises main body (1), rotary-cut bit cone (2), rotary-cut bit cutting tooth (3), PDC drill bit wing (4), PDC cutting teeth (5), oil storage bag (6), nozzle (7) for rotary-cut drill bit and the compound structural representation of PDC drill bit among the present invention.Drill main body (1) comprises gear wheel axle journal, wiper block, high-pressure slurry passage and thread.Wherein bit central is made up of the rotary-cut drill bit, and the well periphery is made up of the PDC drill bit.In the drilling process, creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by PDC bit cutting tooth of well periphery accomplished.
Fig. 2 comprises drill main body (1), rotary-cut bit cone (2), rotary-cut bit cutting tooth (3) for the rotary-cut drill bit structure sketch map in the composite drill bit of the present invention.Drill main body (1) comprises gear wheel axle journal, wiper block, high-pressure slurry passage and thread.Axle journal on gear wheel (2) and the main body (1) adopts tricone bit bearing and hermetically-sealed construction commonly used.The big small end of holding of gear wheel (2) is arranged many circle cutting teeths.
Figure 3 of the present invention in the peeling composite drill bit cutting principle and main design parameters: wheel body angle
, journal offset value
, peeling drill diameter
graph showing the relationship;
Fig. 4 is compound by rotary-cut drill bit and PDC drill bit for composite drill bit of the present invention, and wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of the PDC drill bit.When rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the PDC drill bit is six wing structures, the hat roof construction sketch map of composite drill bit;
Fig. 5 is the gear wheel gear ring perspective view of Fig. 4 corresponding compound drill bit;
Fig. 6 is compound by rotary-cut drill bit and PDC drill bit for composite drill bit of the present invention, and wherein composite drill bit is based on the rotary-cut drill bit structure, and well is trapped among the secondary wing of PDC Bit between the rotary-cut bit cone outward.When rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the PDC drill bit is two wing structures, the gear wheel gear ring perspective view of composite drill bit;
Fig. 7 is compound by rotary-cut drill bit and PDC drill bit for composite drill bit of the present invention, and wherein composite drill bit is based on the PDC drill bit of four blade wing structure, and the well periphery replaces secondary wing by the rotary-cut drill bit.When rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And do not cut heart portion; When the PDC drill bit is two wing structures, the gear wheel gear ring perspective view of composite drill bit;
Fig. 8 is that composite drill bit of the present invention is compound by rotary-cut drill bit and PDC drill bit, and wherein composite drill bit is based on the PDC drill bit structure of six wings, and the well periphery replaces secondary wing by the rotary-cut drill bit.When rotary-cut bit cone number is 3; Wheel body angle
; Axle journal deviant
; And do not cut heart portion; When the PDC drill bit is three wing structures, the gear wheel gear ring perspective view of composite drill bit;
Fig. 9 is compound by rotary-cut drill bit (bit central), PDC drill bit (well is peripheral), rotary-cut drill bit (well is peripheral) for composite drill bit of the present invention, and wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of PDC and rotary-cut drill bit.The peripheral structure of well is based on the PDC drill bit of the four blade wing or six wings, replaced secondary wing and formed by the rotary-cut drill bit.When bit central rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the peripheral rotary-cut bit cone of well number is 3; Wheel body angle
; Axle journal deviant
; And do not cut heart portion; When the peripheral PDC drill bit of well is three wing structures, the gear wheel gear ring perspective view of composite drill bit;
Figure 10 is compound by rotary-cut drill bit and rock bit for composite drill bit of the present invention, and wherein the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of conventional rock bit (gear wheel number >=1).When bit central rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the peripheral rock bit of well is tricone bit, the gear wheel gear ring perspective view of composite drill bit;
Figure 11 is compound by rotary-cut drill bit and rock bit for composite drill bit of the present invention, and wherein (gear wheel number >=1) is formed by conventional rock bit in the composite drill bit center, and the well periphery is made up of the rotary-cut drill bit.When the bit central rock bit is a tricone bit; The peripheral rotary-cut bit cone of well number is 3; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; One when not cutting heart portion, the gear wheel gear ring perspective view of composite drill bit;
Figure 12 is compound by rotary-cut drill bit and rotary-cut drill bit for composite drill bit of the present invention, and wherein composite drill bit is based on the rotary-cut drill bit structure, and well is trapped among compound peripheral rotary-cut drill bit between the rotary-cut bit cone outward.When bit central rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the peripheral rotary-cut bit cone of well number is 2; Wheel body angle
; Axle journal deviant
; And when not cutting heart portion, the gear wheel gear ring perspective view of composite drill bit;
Figure 13 is compound by rotary-cut drill bit and rotary-cut drill bit for composite drill bit of the present invention, and wherein bit central is made up of the rotary-cut drill bit, and the well periphery also is made up of the rotary-cut drill bit.When bit central rotary-cut bit cone number is 2; Wheel body angle
; Axle journal deviant
; And cut heart portion for one; Do not cut heart portion for one; When the peripheral rotary-cut bit cone of well number is 3; Wheel body angle
; Axle journal deviant
; And when not cutting heart portion, the gear wheel gear ring perspective view of composite drill bit;
Figure 14 is 2 for the rotary-cut bit cone number in the composite drill bit of the present invention; Bit diameter
; Wheel body angle
, the shaft bottom profile that the test drill bit of axle journal deviant
carries out simulated test and gets out;
Figure 15 is the shaft bottom profile that tricone bit diameter
gets out;
Figure 16 is the shaft bottom profile that single-cone rotary drill bit diameter
gets out;
Figure 17 is the shaft bottom profile that PDC bit diameter
gets out.
The specific embodiment
Like Fig. 1～shown in Figure 14: have the composite drill bit of the broken rock function of rotary-cut, comprise drill main body (1), gear wheel (2), cutting teeth (3), oil storage bag (4), nozzle (5).Drill main body (1) comprises gear wheel axle journal, wiper block, high-pressure slurry passage and thread.Axle journal on gear wheel (2) and the main body (1) adopts tricone bit bearing and hermetically-sealed construction commonly used.The big small end of holding of gear wheel (2) is arranged many circle cutting teeths.Main body (1) go up roller axle neck plane and drill axis angle
(hereinafter to be referred as the wheel body angle) scope is
(comprise
and reach
); Axle journal side-play amount
scope is
(comprise
and
); Wherein, The wheel body angle that wheel
is corresponding is
; The axle journal side-play amount that wheel
is corresponding is
, and
is bit diameter.
Embodiment 1:
when rotary-cut drill bit of the present invention;
; Diameter
; When drilling speed is
; Experiment is selected Hongya stone respectively for use with material:
; Green sandstone:
; Experimentation is collected landwaste; Analyze broken rock complexity and vibration situation; Inspection cutting teeth polishing scratch and direction, the wheel body speed ratio of calculating gear wheel and drill bit.
Embodiment result and Theoretical Calculation show simultaneously: under the embodiment 1 corresponding parameter condition, the wheel body speed ratio is less than 1, in the present embodiment less than 0.55; Lithology is hard more, and the gear wheel rotating speed is high more, and the wheel body speed ratio is high more.
Embodiment 2:
Embodiment result and Theoretical Calculation show simultaneously: when corresponding
; Lithology is hard more; The gear wheel rotating speed reduces, and the wheel body speed ratio is less than the value of embodiment 1 correspondence.
The comprehensive above-mentioned result of implementation of comparative analysis can get: the rotary-cut bit cutting tooth in the composite drill bit of the present invention has better dynamic performance with the broken rock of rotary-cut mode, and wearing and tearing are even, the bearing working improvement of terms, and drilling life of bit is long, and it is effective to protect the footpath; Optimize wheel body angle
and axle journal deviant
; Can reach increase the gear wheel cutting teeth in shaft bottom and borehole wall slippage, reduce the purpose of wheel body speed ratio, the efficiency of breaking rock and the rate of penetration of raising rotary-cut drill bit.Composite drill bit comprises the rotary-cut drill bit and the PDC drill bit is compound, rotary-cut drill bit and rock bit is compound, rotary-cut drill bit and rotary-cut drill bit are compound, and different composite constructions can be realized different performance characteristics.
Claims (13)
1. the composite drill bit that has the broken rock function of rotary-cut; Comprise drill main body; It is characterized in that: composite drill bit is at least a compound by in rotary-cut drill bit and rock bit, PDC drill bit, the rotary-cut drill bit; The installed surface of the rotary-cut gear wheel (2) of rotary-cut drill bit is connected with gear wheel axle journal on the drill main body (1), and the work plane of rotary-cut gear wheel is towards the borehole wall and shaft bottom; Gear wheel axle journal plane and drill axis angle are that the scope of wheel body angle
is for
; The scope of axle journal side-play amount
is
, and wherein
is the rotary-cut bit diameter.
2. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: the complex method of rotary-cut drill bit and additional drill bit comprises whole processing, assembly welding, screwed connection.
3. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: described rotary-cut bit cone (2) is the sintered body of steel part, steel body and metal dust; Described rotary-cut gear wheel (2) structure has the sintering gear wheel of mill teeth gear wheel, insert cone, steel body and metal dust; Described rotary-cut gear wheel (2) number >=1.
4. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: the cutting teeth of described rotary-cut drill bit (3) is shaped as scoop chisel insert, chisel teeth, blunt conical-ended shape insert, hemi-spherical ended shape insert, frustum tooth, cylinder butt tooth or pyramid tooth; Described rotary-cut bit cutting tooth (3) material is carbide alloy, polycrystalline diamond complex, TSP, impregnated with diamond, natural diamond, cubic boron nitride, pottery, or comprises the cutting teeth of carbide alloy, diamond or cubic boron nitride; Described rotary-cut bit cutting tooth (3) gear ring number >=1.
5. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: said drill main body (1) is the sintered body of steel part, steel group welding piece or steel body and metal dust; Said drill main body has wiper block on (1), and the wiper block surface is applied and is welded with antifriction alloy or is inlaid with carbide alloy, composite polycrystal-diamond, TSP, impregnated with diamond, natural diamond, cubic boron nitride or ceramic materials.
As claimed in claim 1 having a function of peeling composite drill rock breaking, characterized in that: the PDC drill bit from the composite peeling, peeling drill bit center of the composite arrangement, the peeling roller cutting teeth completed well eye center drilling; PDC drill boreholes arranged in the periphery by the PDC bit cutter complete peripheral portion of the borehole drilling; peeling drill diameter
Less than composite drill diameter
.
7. the composite drill bit with the broken rock function of rotary-cut according to claim 1; It is characterized in that: compound by rotary-cut drill bit and PDC drill bit; Composite drill bit is based on the rotary-cut drill bit structure; The rotary-cut drill bit covers the composite drill bit center and well is peripheral, and the PDC drill bit is the secondary wing of PDC drill bit that between the rotary-cut gear wheel of the peripheral scope of well at the rotary-cut drill bit, is provided with; Creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by the cutting teeth of rotary-cut drill bit and the secondary wing of PDC drill bit of well periphery accomplished jointly.
8. the composite drill bit with the broken rock function of rotary-cut according to claim 1; It is characterized in that: compound by rotary-cut drill bit and PDC drill bit; Composite drill bit is based on the PDC drill bit structure of the four blade wing or six wings; The PDC drill bit operator wing covers the composite drill bit center and well is peripheral, and the rotary-cut drill bit is arranged in the well periphery, replaces the secondary wing of PDC drill bit; Creeping into by the cutting teeth that is positioned on the PDC drill bit operator wing of well center accomplished, and creeping into by the cutting teeth on the rotary-cut drill bit and the PDC drill bit operator wing of well periphery accomplished jointly.
9. the composite drill bit with the broken rock function of rotary-cut according to claim 1; It is characterized in that: compound by rotary-cut drill bit, PDC drill bit, rotary-cut drill bit; The structure of well periphery is based on the PDC drill bit structure of the four blade wing or six wings; Composite drill bit center arrangement rotary-cut drill bit, the well periphery is made up of PDC drill bit and rotary-cut drill bit that other establishes, and the rotary-cut drill bit that other establishes replaces the secondary wing of PDC drill bit; Creeping into by the rotary-cut bit cutting tooth that is positioned at the composite drill bit center of well center accomplished, and creeping into by the PDC drill bit rotary-cut bit cutting tooth peripheral with being positioned at well of well periphery accomplished.
10. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: compound by rotary-cut drill bit and rock bit, the composite drill bit center is made up of the rotary-cut drill bit, and the well periphery is made up of rock bit; Creeping into by rotary-cut bit cutting tooth of well center accomplished, and creeping into by the rock bit cutting teeth of well periphery accomplished.
11. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: compound by rotary-cut drill bit and rock bit, the composite drill bit center is made up of rock bit, and the well periphery is made up of the rotary-cut drill bit; Creeping into by the rock bit cutting teeth of well center accomplished, and creeping into by rotary-cut bit cutting tooth of well periphery accomplished.
12. the composite drill bit with the broken rock function of rotary-cut according to claim 1 is characterized in that: compound by rotary-cut drill bit and rotary-cut drill bit, composite drill bit is based on the rotary-cut drill bit structure, compound peripheral rotary-cut drill bit between well center rotary-cut drill bit rotary-cut gear wheel; Creeping into by center rotary-cut bit cutting tooth of well center accomplished, and creeping into by center rotary-cut drill bit and peripheral rotary-cut bit cutting tooth of well periphery accomplished jointly.
13. the composite drill bit with the broken rock function of rotary-cut according to claim 1, it is characterized in that: compound by rotary-cut drill bit and rotary-cut drill bit, composite drill bit center and well periphery are formed by the rotary-cut drill bit; Creeping into by rotary-cut bit cutting tooth of the center of well and well periphery accomplished.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110390021.5A CN102434105B (en) | 2011-11-30 | 2011-11-30 | Composite bit with rotary cut rock-breaking function |
| PCT/CN2012/070807 WO2013029347A1 (en) | 2011-08-26 | 2012-01-31 | Composite bit with rotary cut rock-breaking function |
| RU2014111463/03A RU2585777C2 (en) | 2011-08-26 | 2012-02-01 | Rolling drilling bit for rotary drilling of rock |
| PCT/CN2012/070829 WO2013029349A1 (en) | 2011-08-26 | 2012-02-01 | Roller bit for rock-breaking by rotary-cutting |
| US14/240,739 US9828806B2 (en) | 2011-08-26 | 2012-02-01 | Roller bit for rock breaking by rotary cutting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110390021.5A CN102434105B (en) | 2011-11-30 | 2011-11-30 | Composite bit with rotary cut rock-breaking function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102434105A true CN102434105A (en) | 2012-05-02 |
| CN102434105B CN102434105B (en) | 2015-06-24 |
Family
ID=45982430
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110390021.5A Active CN102434105B (en) | 2011-08-26 | 2011-11-30 | Composite bit with rotary cut rock-breaking function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102434105B (en) |
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| CN103089153A (en) * | 2013-02-28 | 2013-05-08 | 西南石油大学 | Wide-tooth cone composite drill bit |
| CN103835656A (en) * | 2014-02-28 | 2014-06-04 | 成都大漠石油机械有限公司 | PDC drill bit which is not easily blocked by rock fragments |
| CN103835657A (en) * | 2014-02-28 | 2014-06-04 | 成都大漠石油机械有限公司 | High-efficiency PDC drill bit |
| CN103939022A (en) * | 2014-04-10 | 2014-07-23 | 河北驰恒钻头制造有限公司 | Combined drill bit combining PDC drill bit and roller bit for joint rock breaking |
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| CN103835656A (en) * | 2014-02-28 | 2014-06-04 | 成都大漠石油机械有限公司 | PDC drill bit which is not easily blocked by rock fragments |
| CN103835657A (en) * | 2014-02-28 | 2014-06-04 | 成都大漠石油机械有限公司 | High-efficiency PDC drill bit |
| CN103939022A (en) * | 2014-04-10 | 2014-07-23 | 河北驰恒钻头制造有限公司 | Combined drill bit combining PDC drill bit and roller bit for joint rock breaking |
| CN103939022B (en) * | 2014-04-10 | 2015-12-16 | 河北驰恒钻头制造有限公司 | The combined drill of a kind of PDC drill bit and rock bit combined-breaking rock |
| CN104131785A (en) * | 2014-08-06 | 2014-11-05 | 四川万吉金刚石钻头有限公司 | Single-cone PDC concentric RWD drill bit |
| CN104763340A (en) * | 2015-01-31 | 2015-07-08 | 成都科盛石油科技有限公司 | Rapid-cooling type drill bit for petroleum drilling |
| CN107709693A (en) * | 2015-07-17 | 2018-02-16 | 哈里伯顿能源服务公司 | Center has the Mixed drilling bit for reversely rotating cutter |
| US10557311B2 (en) | 2015-07-17 | 2020-02-11 | Halliburton Energy Services, Inc. | Hybrid drill bit with counter-rotation cutters in center |
| CN106968595A (en) * | 2017-04-27 | 2017-07-21 | 刘哲岳 | Impact type continuously engages the multi-faceted efficient Mixed drilling bit of cutting |
| CN106968595B (en) * | 2017-04-27 | 2019-04-26 | 刘哲岳 | Impact type continuously engages the multi-faceted efficient Mixed drilling bit of cutting |
| CN108179983A (en) * | 2018-02-26 | 2018-06-19 | 西南石油大学 | It is a kind of to rush the efficient rock-breaking combination tool for revolving-scraping and cut staged effect |
| CN108222841A (en) * | 2018-03-16 | 2018-06-29 | 中南大学 | A kind of compound rock drill and rock drilling method |
| CN108625789A (en) * | 2018-05-22 | 2018-10-09 | 西南石油大学 | The composite drill bit of Split teeth wheel and PDC |
| WO2020062741A1 (en) * | 2018-09-26 | 2020-04-02 | 西南石油大学 | Efficient composite drill bit suitable for deep well stratum difficult to drill |
| CN110043193A (en) * | 2019-05-28 | 2019-07-23 | 西南石油大学 | Split type single cone PDC composite drill bit |
| CN110331941A (en) * | 2019-07-04 | 2019-10-15 | 立府精密机械有限公司 | A kind of Strong shear polycrystalline diamond compact bit |
| CN116816272A (en) * | 2023-08-28 | 2023-09-29 | 西南石油大学 | PDC drill bit with disc cutter and rotary teeth |
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