CN86100885A - A kind of improved groove chipping type bit - Google Patents

Abstract

The method of using polycrystal diamond rotary drill rock cutting structural optimization is to adopt the groove cutting movement.The polycrystalline diamond cutlery all is arranged in and makes its profile to constitute many triple on bit face.Each triple comprises two groove cutting teeths and the tooth of the clear end.Each groove cutting teeth cuts out a groove in rock texture.So two groove cutting teeths that radial spacing arranged delimited the boundary of the middle residual clearance of rock.The tooth of the clear end is disposed this intermediate gaps.In preferable embodiment, the radial width of this residual dike band is to be equal to or less than effective cutting width of end tooth clearly, and each groove cutting teeth and tooth of the clear end all are that the azimuth skew is arranged each other on bit face, make end tooth clearly be configured in the centre of two groove cutting teeths by the azimuth.

Description

A kind of improved groove chipping type bit

The present invention relates to the field of geological drilling tools, the application polycrystal artificial diamond that touches upon especially bores the rotary drilling-head of tooth as cutting element.

The basic difference that the stock removal action aspect of rotary cutting type drill bit and roller cone drill bit is had is: rotary cutting type drill bit cuts with shear action, and roller cone brill is to be cut by squeezing action.Can be by adopting as the artificial polycrystalline diamond element of cutting element, the performance of rotary cutting type drill bit has improved significantly.The undertaker of the present invention has bored the design of rotary drilling-head and this spark tooth has been attached to and remains on the surface of drill bit and from this surface the artificial diamond and exposed, and the aspect provides the method for shear action with practical value initiatively.

In general, the spark tooth on rotary drilling-head will be in the bottom of boring to rock texture inscribe slice or shear out groove.According to well-known design technically, bore tooth all is to be arranged on the bit face with the mode that overlap joint is arranged with assembling.For instance, a row spark tooth back will typically dispose the spark tooth of a line skew position.In some design, this row tooth of skew is configured on the bit face with radially-arranged mode, though they are the back that are arranged in previous column by the orientation, this mode makes tooth in the tooth in prostatitis and the space central authorities between the tooth.Other design imagination is arranged subsequently each row tooth with the method for other substep radial delta, and for example three row polymerization take places are formed a cutting unit, and making every row amount of radial deflection previous column on the orientation is 1/3rd of interdental space.

Consequently on the bottom rock structural face of boring, cut many grooves by the first row tooth.The secondary series tooth spiral change by same given radial line and adjoin cut again on the groove that the first row tooth cuts out adjoin circular at interval 1/3rd or half.Has cut from rock texture at the residual interval that this cutting process is proceeded down between whole teeth and tooth.Like this, respectively list corresponding tooth and will cut a complete annulus adjoining from scar.The annulus that tooth cuts out of respectively organizing that adjoins also adjoins, so its result bores whole one deck from the scar of boring.The forward travel of cutting element normally along with the constantly outwards motion radially of adjacent, continuous radial delta, perhaps can be designed to inwardly make cutting movement with the successive radial delta.

Though the principal mode of existing cutting practice is as described above, although seldom employing, the cutting process by cutting off groove is known dawn already.At United States Patent (USP) 2,960, can find a soft rock to cut the example of cutlery among " bit cutting blade " (" Drill Cutting Head ") of No. 312 Kants you (Kandle).Your example of Kant has two concentric circle wheels, each takes turns the brill tooth that is set on the rotary cutting bit with many, cut out the grooving of two circles, and the middle dike band between two groovings will be by going cutting, push away and ruin or grating at one of two clear shear blade tools of centre.Though clear shear blade tool is almost considered to add in the design to go afterwards, you are the grooving that incision leaves certain intervals each other in rock texture for the Kants, and middle residual rock is with an example of the situation of the removing of the cutlery between the groove.

The removing of the back that is produced between the adjacent grooving or by groove cutting also has been applied on rock drill bit or the roller cone drill bit to a certain extent.At United States Patent (USP) 4, Si Chuite Orion Pax (Stratapax) cutlery of " the mixed rock drill bit " of 343, No. 371 Bakes (Baker) (" Hybrid Rock Bit ") all is configured on two bit bodys between the counter roller cone on two positions of stretching out relatively.Boring groove that teeth cut out with many on the roller cone leaves over the dike band of protuberance and is removed by the Si Chuite Orion Pax cutlery that partly plays the cut drill effect subsequently.

The groove cutting process also uses in roller cone itself to a certain extent, as United States Patent (USP) 4, " with the roller cutlery big and the little denture of splicing " of 202, No. 419 Youngblood (" Roller Cutter With Major and Minor Insert Rows ") institute is illustrational.

But, do not have a prior art design enlarge effectively or exploitation ditch groove cutting aspect any progress is arranged.In fact, even the groove cutting process uses alone on rotary cutting bit, it also must cater to the need and be favourable, surpasses the shear action of other types in every sense, and this fact is not still appreciated by people in fact.

So what need is a kind of rotary chipping type bit of design, it can greatly enlarge the shear action of rotary drilling-head, and is when cutting element is artificial polycrystalline diamond element, all the more so especially.

The present invention is a kind of improvement of disposing the rotary drilling-head of many polycrystalline diamond teeth on the bit face.This improvement comprises the first and second polycrystalline diamond teeth that are used to cut groove at least.One the 3rd the polycrystalline diamond tooth and the first and second polycrystalline diamond tooth collaborative works also are configured between the two, are to be used for clearing up being present in first and second teeth and cutting material between the groove.The 3rd tooth has azimuth deviation with respect to one in first and second teeth at least.Because this combination of element, doing groove cutting with the first, the second and the 3rd tooth teamwork is optimization to drill bit.

More precisely, available four embodiments of this improvement illustrate.In the first embodiment, first and second teeth come down to be configured on the drill bit in identical position of orientation.First and second teeth are radially at regular intervals, and the 3rd tooth is configured to be positioned at first and second back of boring tooth on the orientation, follow first and second in other words and bore tooth, and its front and back position is determined by the direction of rotation of rotary drilling-head.

Second embodiment, both are radially all having displacement each other with the orientation first and second teeth.The 3rd tooth is arranged radially between first and second teeth, and is configured on the orientation be positioned at after first and second teeth, follows the first and second two teeth in other words.

The 3rd embodiment, first and second teeth are each other all by orientation and being arranged radially on the bit face.The 3rd tooth becomes to be positioned at the first tooth back by azimuth configuration, and in the front of second tooth, leads over second tooth in other words.

The 4th embodiment, the 3rd tooth are to become the front be positioned at the first and second two teeth by azimuth configuration, lead over two teeth in other words.

In each embodiment, the radial spacing in the triple that per three teeth are a group between first and second teeth will leave the increase of drill bit center of rotation axial line distance and reduces along with triple.

The present invention also comprises many artificial polycrystalline diamond elements are being disposed in use on drill bit rotary drilling-head cutting process, comprises to use two groove cutting teeths to two cutting steps that the concentric groove of radial spacing is arranged of rock texture incision.Space residual between these two groove cutting teeths is removed by one the 3rd tooth of the clear end.Per two groove cutting teeth groups have one the corresponding the 3rd tooth of the clear end.Particularly, after in the cutting step, further comprising cutting first groove, the 3rd clear end tooth of being followed the tracks of by orientation is disposed the rock between first groove and second groove that will cut out, and is then cut the step of second groove then by the tooth of an orientation tracking.

Investigate following each accompanying drawing now, can understand above-mentioned these and other embodiments of the present invention better.Components identical all uses identical numeral to do reference number in the accompanying drawing.

Fig. 1 is the mining drill bit plan view that is arranged as the groove cutterhead according to the present invention with the cutting teeth polymerization.

Fig. 2 is the model silhouette sectional drawing of an aggregation group coverage of drill bit blade among the Fig. 1 that is seen in radial line when drill bit rotates.

Fig. 3 a is used for the blade of Fig. 2 is configured to the mould cross section view that a matrix is permeated drill bit.

The mould cross section view of all the other teeth of aggregation group that Fig. 3 b is to use in Fig. 2 to be painted.

Fig. 4 is the first embodiment profile plan view of groove cutting teeth.

Fig. 5 is the second embodiment profile plan view of groove cutting teeth.

Fig. 6 is the 3rd an embodiment profile plan view of groove cutting teeth.

Fig. 7 is the 4th an embodiment profile plan view of groove cutting teeth.

Fig. 8 is the profile plan view that utilizes the oil exploration drill bit of the selected configuration of groove cutting teeth of the present invention.

Fig. 9 is the profile cross section figure that is painted by the 9-9 hatching of Fig. 8, expresses the lateral longitudinal section of oil exploration drill bit.

Figure 10 is that the profile lines that are configured in the tooth on the oil exploration drill bit of Fig. 8 and Fig. 9 are drawn.

Investigate the detailed description of each graphic formula accompanying drawing of narrating above now, can understand the present invention and its each embodiment better.

The present invention relates to a kind of is being the design that belongs to optimization aspect the dissected valley groove action of artificial polycrystal diamond rotary drill.The cutting teeth of drill bit all is to be combined into ternary triple in preferable embodiment.Two teeth in the front of triple are to be particularly suitable for and to arrange to cut parallel groove.The 3rd tooth of triple is to be particularly suitable for and to be arranged cutting the intermediate gaps between preceding two teeth in the rock texture, perhaps is used for removing preceding two teeth in the triple and cuts out the residual dike band in centre between the groove.The arrangement and the appearance of last this tooth are to serve as a Hammer head and chisel, reach than the wide cutting contact surface of preceding two dental transition in the triple.According to the present invention, orientation and radial arrangement that polymerization forms each tooth in the cutlery triple are very important for enlarging stock-removing efficiency in the whole dissected valley groove course of action, and this point has been determined.Translate into mining drill bit plan view shown in Figure 1 now, can understand the present invention, its operating principle and various embodiment better.

In Fig. 1, a mining core bit is represented with reference number 10 usually, it is characterized in that representing with external diameter numbers 12 and interior diameter numbers 14.Retouch as radial radiation water channel 16 and to draw, drill bit 10 is divided into six 60 fan sections of spending.On the limit in contiguous every radiation jetting road 16, disposing at least one, common several polycrystalline diamond teeth 18.Although narrated here, they are called as artificial polycrystalline diamond tooth, in fact tooth 18 can be any cutting element now on record or that invent recently, for example time Chris of moving of Salt Lake City, Utah, United States gulps down gloomy (Norton Christensen) company and sells, and uses the brill tooth that goes in the various drill bit design with what shellfish Rick Rashid (Ballaset) trade mark was sold.

Tooth 18 all is that polymerization is arranged, and forms triad group.For example, guide's tooth of first polymerization triple of two tooth 18a formation teeth is right, and tooth 18b is the 3rd tooth of triple.Described in the plan view as Fig. 1, tooth 18b is arranged radially in two space point midways between the 18a tooth, and orientation biasing is positioned at the angle of predesignating in tooth 18a back, is about 60 degree angles in this example.Tooth 20a serves the same role in fact with respect to tooth 20b.So tooth 20a and tooth 20b polymerization take place constitute a triple that cuts groove.Extra tooth can be contained in also such as the tooth 24 that limits diameter that the form with routine provides assisted machining on the drill bit 10.

Translate into Fig. 2 now, its expression can be observed in a fore-and-aft plane of fixing when drill bit rotates, the model amplification profile of the single triple coverage of tooth.The triple of being made up of tooth 18a and 18b is to describe according to the example among Fig. 1.Two the 18a teeth in front go out the parallel circular groove of twice with the flush cut of transversal any hypothesis.After this, running into fixedly, second tooth of fore-and-aft plane will be the tooth 18b that is configured in the about point midway in space between two 18a teeth.In the embodiment of Fig. 1 to Fig. 3, each tooth all shows triangle on cross section, situation when boring tooth as use triangle polycrystal artificial diamond, what resemble General Electric Co. Limited (General Electric Co.) manufacturing is the brill tooth of trade mark with " Gao Saite (GEOSET) ".But, as illustration in the more embodiment that will narrate below, the present invention does not retrain or limits arbitrary given configuration of using tooth or cutting element.

Fig. 3 a is the mould cross section view that is equivalent to the 3a-3a Section line of Fig. 1, will dispose a pair of brill tooth of triple in this mould section, for example two 18a teeth.Among the corresponding triangular groove 26a or 26b that triangle spark arrangements of components has been processed in graphite mould 28.So with common tungsten-carbide powder matrix backfill mould 28, all synthetic materials makes the matrix drill bit that is configured as infiltration by the processing method infiltration of routine.In graphic embodiment, each 18a bores tooth selected angle that tilts in mould 28.Lift an example, the groove 26a that is used for a 18a tooth tilts 11 ° to spend angles with respect to center line 30.

Fig. 3 b be diagram from mould 28 interceptings be equivalent to tooth 18b and tooth 24 positions, with second section of the 3b-3b Section line coordination of Fig. 1.Bore tooth, 18b, 20b and 22b such as Fig. 1 will be configured in the groove 36, and diameter qualification tooth 24 is configured in the groove 38.Tooth 18b vertically disposes with respect to bit face 40, and tooth 24 is with respect to the protruding 27 degree angles of vertical plane.Compare with tooth 18a and 18b appear (0.180 inch), tooth 24 has only sub-fraction appear (0.070 inch).Be configured in the mould 28 and in Fig. 3 a and 3b the graphic tooth polymerization take place that is depicted in the radial arrangement position unite and cut out azimuthal sword road, perhaps form as Fig. 2 profile the model of the coverage described.

Please translate into Fig. 4 now, express another embodiment of a mining drill bit there with plan view, represent with reference number 42 usually, it is in a kind of modification of Fig. 1 to flute profile depicted in figure 3.The end face 44 of drill bit 42 is divided into three 120 ° fan section, as radial radiation water channel 46 limited.All dispose in each fan section and bore the tooth 48a triple the same with 48b, the azimuth displacement of a tooth of beginning is about front water channel 46 45 degree afterwards.Triple is made up of a pair of tooth 48a and a monodentate 48b who follows.Tooth 48a comprises that a kind of General Electric Co. Limited (General Electric) that resembles bores element and a kind of structure that a Chris gulps down the seen tooth of shellfish Rick Rashid (Ballaset) drill bit that gloomy (Norton Christensen) company makes of moving that resembles Salt Lake City, Utah, United States with the polycrystal artificial diamond who is generally triangular prism shape of " GEOSET " trade mark manufacturing.But other kinds drill bit structure now on record or invention recently can be replaced usefulness equally easily, and this also belongs within the category of the present invention fully.In a word, a pair of tooth 48a is configured on the bit face 44 by identical azimuth, but all is predetermined distance of radial displacement.The triangle land of tooth 48a all is a tangentially setting, promptly has a top land to be parallel to the tangent line of the radius at toothing position usually.Thereby tooth 48a thereunder cuts two parallel circular groove in the rock texture.

The 3rd tooth 48b is arranged in the back of tooth 48a, and it is made up of to the artificial polycrystalline diamond of installing cylindrical shaft, resembles that the People's Republic of China (PRC) sells.Radial distance between two tooth 48a is the diameter that is equal to or less than cylin-drical tooth 48b.Tooth 48b has azimuthal displacement in the back of a pair of 48a tooth, and within the radial gap between 48a two teeth.Like this, after the 48a tooth cut out a pair of groove, tooth 48b followed and beats, carves cutter, or removed the middle dike band in the rock texture that carries between the twice groove with other modes.

Each fan section of drill bit 42 can also comprise many diameter protection cutleries 50, and they generally only keep or protect this diameter, but discord is used for the cutlery 48a and the collaborative work of 48b triple of ditch groove cutting.Each cutlery triple in each fan section all is radially to be configured on the bit face 44, enables to cross to reach when doing radial scan fully at drill bit to cover, as what can be seen in any one specific vertical fixed pan in rock texture.Lift an example, the triple of tooth 52 is swept more the part near the bit face 44 of external diameter 54, and the triple of tooth 56 is swept a middle more part, and the triple of tooth 48a and 48b is swept more that part of near interior diameter 58.Though do not have the ditch line of rabbet joint of arbitrary tooth to drop on the same ditch line of rabbet joint of any another tooth of drill bit, every part of these several parts all overlaps each other.For example, in the diagram embodiment of Fig. 4, the triple 52 of ragged edge marks its outmost turns groove from external diameter 54 about 0.12 inch (3.05 millimeters), and the center line of the outmost turns groove that triple 56 marks is 0.15 inch (3.81 millimeters) from external diameter 54.The outmost turns ditch groove center that triple 48a and 48b mark is 0.19 inch (4.83 millimeters) from external diameter 54.The appear height of guide's a pair of tooth on drilling area end face 44; go out to bore 44 at least 0.150 inches in increment face (3.81 millimeters) as the 48a tooth depth in 48a and the 48b triple; the 3rd tooth in diameter protection tooth 50 and the triple such as 48b tooth are then appeared highly lower, for example are 0.105 inch (2.67 millimeters).

In these triple, the space between the groove that the tooth of each triple cuts out, each is organized can be different between the tooth.Illustrate, the triple 52 of ragged edge can have space between the groove of about 0.25 inch (6.35 millimeters), and triple 56 has 0.31 inch in space (7.87 millimeters) between groove, and triple 48a and 48b have 0.38 inch in space (9.65 millimeters) between groove.Therefore, bigger near the linear velocity of external diameter 54 place's drill bits 42, the space is less between groove.This space along with triple from the reducing of radial distance of center line of bit and increase progressively.Like this, can the big rock cutting rate on the 3rd tooth that put on triple be compensated, such as tooth 48b, because it moves to extroversion to external diameter 54 from bit central.In fact, if want, can make that the radial distance in space and the 3rd tooth is inversely proportional between groove, as tooth 48b.

Please translate into Fig. 5, the there is the plan view of second embodiment of illustration.This drill bit is generally represented with reference number 41, and it also is divided into three fan sections at 120 ° of degree angles by radial radiation water channel 47.Every fan section comprises a cutlery triple.For example, radially the triple of the inside comprises a pair of tooth 49a and a tooth 49b who has ground, orientation to follow the tracks of, and is arranged radially between a pair of 49a tooth.Radially the triple 53 of Zhong Jian triple 57 and ragged edge is all similarly formed.Diameter protection tooth 51 also is to be configured on the inner and outer diameter.

To be tooth be configured to approximately to lag behind tooth to 15 ° of first tooth elder generation guide faces of 49a to the second tooth azimuth of 49a to the embodiment part that second embodiment of Fig. 5 is different from Fig. 4.The 3rd clear end tooth 49b azimuth disposes to be about and lags behind tooth to 30 ° of the first guide faces of second tooth of 49a.

Please translate into Fig. 6 now, illustration another embodiment of the invention there, show one mining drill bit plan view, generally represent with reference number 60.Mining drill bit 60 is divided into three fan sections by radial radiation water channel 62 again.Diameter keeps that tooth 64 is the same with the front scheme to be provided with, still, and in each fan section, the triple of tooth is to follow tooth of the clear end 68 after being arranged in the first groove cutting teeth 66, after this follows groove cutting teeth 70 again.In the embodiment of Fig. 6, guide's groove cutting teeth 66 is radially teeth of the inside of tooth 66-70 triple, and second tooth that groove cutting teeth 70 is radially ragged edges of triple.

In the embodiment of illustration, first groove cutting teeth 66 azimuths configuration is to lag behind the about 35 ° of degree of water channel 62 center lines, and then, the configuration of tooth 68 azimuths, the clear end lags behind the about 30 ° of degree in guide's sword limit of tooth 66.At last, the configuration of the azimuth, guide's sword limit of the second groove cutting teeth 70 lags behind the about 20 ° of degree in center of end tooth 68 clearly.As narrating about the embodiment of Fig. 4 in front, tooth 66,68 and 70 radial displacement are be adjusted to the space point midway of end tooth 68 between groove cutting teeth 66 and 70 clearly.It is the radially effective cutting width that is equal to or less than end tooth 68 clearly that radial displacement between the tooth 66 and 70 of azimuth skew is arranged, and this width may be a bit larger tham or be slightly smaller than the actual tangible radial dimension of end tooth 68 clearly.For this dimensions, " effectively cutting width " of tooth give a definition be a land walk between two concentric grooves that a cutter can remove or two groove cutting teeth between the maximum radial dimension of rock dike band.Like this, effectively the value of cutting width will depend on the design of tooth, character and other data of holes drilled of rock.Distance between tooth 66 and 70 groove is to use with quadrat method to be adjusted to the big stock removal rate that compensation produces near diameter 72 places, shining in pairs as the big stock removal rate of narrating about the embodiment of prior figures 4 that produces near interior diameter 74 places.

At last, the sword road that is cut out by the tooth 76 and 78 of the circular blade road of the tooth 66,68 of triple and 70 incision rock textures and triple overlaps mutually, and tooth 76 and 78 is that the same manner of discussing with the front is configured on the end face 80 of drill bit 60.

Please translate into Fig. 7 now, still illustration another embodiment of the invention of there.Here be a mining drill bit, generally represent, also be divided into three fan sections that limit by radial radiation water channel 84 with reference number 82.Each fan section comprises many diameter protection teeth 86.Here, leading two the groove cutleries subsequently in tooth 92 azimuths, the clear end.Illustrate leading groove cutting teeth 88 and second a groove cutting teeth 90 and a guide's tooth 92 collaborative works of the clear end.Moreover tooth 88 and 90 all is the Ballset board tooth that the tangentially edge is joined, and tooth of the clear end 92 is axial or the cylindrical polycrystalline diamond cutlery of double-screw bolt assembling.In this graphic embodiment, clear end tooth 92 azimuth displacements lag behind its about 30 ° of degree of front water channel center line.Guide's sword azimuth displacement of the first groove cutting teeth 88 lags behind end tooth 92 about 20 ° of degree clearly, and the second groove cutting, 90 about 35 ° of degree are led in guide's sword azimuthal displacement of the first groove cutting teeth 88.

As in the embodiment of Fig. 4 to Fig. 6, dissected valley groove tooth 88 and 90 all is to inlay the Ballaset board tooth of joining tangentially, and tooth of the clear end 92 is cylindrical polycrystalline diamond elements of a bolts assemblies.By same mode, three teeth of 96 constitute second triple, and three teeth of 98 constitute the 3rd triple.The same with former narration, each triple of tooth 98,96 and 88-92 all is that radial arrangement is crossed whole bit face 94, enables from external diameter 100 to interior diameter to cut in 102 the scope circular blade road of overlap joint.These triple all also have the feature as different size space between the groove of narrating previously that traverses whole bit face 94.

In conjunction with Fig. 5,6 and 7 each mining drill bits 41,42,60 and 82 of describing respectively and narrating, all through piercing rock test and having formulated the speed of creeping in the above.In the test of this problem, the design expression of the mining drill bit 60 of Fig. 6 goes out the highest speed of creeping into, the drill bit 41 of Fig. 5 to creep into speed about 2/3 a little less, the design expression of the drill bit 82 of Fig. 7 goes out the minimum speed of creeping into.The triple that also is not interpreted as what drill bit 60 is fully arranged more far better than the triple arrangement of drill bit 41,42 and 82 miraculously.In fact, superior function as illustrated a kind of " in the centre " (" in-between ") design of the drill bit 60 of Fig. 6 is surprising, because the traditional concept of ditch groove cutting is always thought, can dispose the unsupported dike band that limits fully between the groove based on tooth of the clear end, drill bit 41 and 42 design should be best.

Translate into Fig. 8 now, it shows the profile plan view that is included in an oil exploration drill bit in the present invention.The oil exploration drill bit is generally represented with reference number 104, comprises an interior claw type apex point 106.It is in the sampan shape groove 110 of boundary that hydraulic oil outwards flows to external diameter 112 through spirality channel 108.Zone between each water channel 108 all is a gatherer 114.Gatherer 114 and water channel 108 limit the border of spirality dike band 116 successively, and cutting element all is configured in (not expression among Fig. 8) above the dike band 116.

Shown in Figure 9 is the vertical section of an oil exploration drill bit that Fig. 8 described, and is the cross sectional side view of being seen from the 9-9 hatching intercepting of Fig. 8.Here see that claw type drill bit opening 106 is outward-dipping, and be positioned at apex point 118 places of drill bit 104 or near apex point 118.Usually the flat part or the outside 120 extends to shoulder 112 from apex point 118, and bit face extends on the external diameter 112 there.A total triple of boring tooth of representing with reference number 124 is depicted on the outside 120 with magnification ratio, and two Ballaset board teeth 126 and one place the cylindrical cutlery 128 usefulness sections of centre to illustrate there.Translate into detailed string diagram shown in Figure 10, can come to understand the situation that is covered with the sword tooth configuration on oil exploration drill bit 104 surfaces according to the present invention now.

In the diagram embodiment of Figure 10, realized the triple design of Fig. 6, though any one embodiment can adopt, need only by suitably using shellfish Rick Rashid (Ballaset) board sword tooth to substitute cylindrical cutlery, vice versa.The detailed string diagram of Figure 10 is to be covered with the describing of sword tooth configuration profile that drill bit 104 whole surfaces comprise the external diameter face.This string diagram cuts and launches to form a plane vertically hung scroll to drill bit along arbitrary certain radius and draws later on from the external diameter to the center.So the distortion in the plane of projection of the detailed string diagram of Figure 10 on the ratio is unavoidable.Therefore Figure 10 be it must be understood that to only representing a kind of correlation of logic, should be not persistant with graphic proportional configuration.

Oil exploration drill bit 104 is divided into three fan sections 130,132 and 134.Each fan section of 130 to 134 comprises two spirality dike bands, is 116a and 116b in 130 districts, is 116c and 116d dike band in 132 districts, and 134 districts comprise dike band 116e and 116f.

Translate into 130 districts now, it shows that many are inlayed the Ballaset board sword tooth of joining tangentially, as tooth 136 and many sword teeth that cylindrical artificial polycrystal double-screw bolt is installed, is configured in dike band 116a as tooth 138, and tooth 148a is configured in dike band 116b.Except that the tooth of these patterns, also comprise the natural spark 140 that many surface edges are put, be distributed in apex point 118 surface and shoulders 122, on the whole external diameter 112 that also distributes.The spark 140 that surface edge is put all is common, and all is the well-known technically method usefulness that is made for the abrasion protection.

Now from apex point 118 first triple of 130 district's internal channel cutting edge teeth that begins one's study.The first groove cutting edge, tooth 136 is guides with respect to cylindrical cutlery 138 placed in the middle, and configuration radially outward.The second groove cutting edge of triple is a Ballaset board tooth 142, and it is the tooth of outermost radial outside on the second dike band 116b.Second triple of tooth also comprises tooth 142, cylindrical polycrystalline diamond (PCd) tooth 144 and the Ballaset board tooth 146 on dike band 116a.The triple of tooth successively between embankment 116a and 116b towards shoulder 122 direction arranged crosswise.Lift an example, the 3rd triple also comprises shellfish Rick Rashid (Ballaset) tooth 146, cylin-drical tooth 148 and shellfish Rick Rashid tooth 150, and that is described in the pie graph 6 mutually concerns pattern.The 4th triple comprises shellfish Rick Rashid tooth 150, cylin-drical tooth 152 and the shellfish Rick Rashid tooth 154 on dike band 116a.Like this, each shellfish Rick Rashid tooth just becomes dual-purpose, because it constitutes a groove cutting teeth of the cutting teeth triple of adjoining again.

The configuring condition of sword tooth is as long as following each triple of columns is just complete: shellfish Rick Rashid tooth 154, cylin-drical tooth 156 and shellfish Rick Rashid tooth 158; Shellfish Rick Rashid tooth 158, cylin-drical tooth 160 and shellfish Rick Rashid tooth 162; Shellfish Rick Rashid tooth 162, cylin-drical tooth 164 and shellfish Rick Rashid tooth 166; Shellfish Rick Rashid tooth 166, cylin-drical tooth 168 and shellfish Rick Rashid tooth 170; Shellfish Rick Rashid tooth 170; Cylin-drical tooth 172 and shellfish Rick Rashid tooth 174; Shellfish Rick Rashid tooth 174 and owing to sampan shape groove is arranged and the cylin-drical tooth in abridged, and shellfish Rick Rashid tooth 176; Shellfish Rick Rashid tooth 176, the cylin-drical tooth 178 on dike band 116a and last shellfish Rick Rashid tooth 180.

Remove beyond the above triple of in 130 districts, listing clearly, additional cylin-drical tooth, also can calculate as the cylindrical cutlery 182 on 116a dike band with at the shellfish Rick Rashid tooth 184 of dike band 116a leading edge and to enter, design principle routinely is as the Repeated Cutting of coverage.

In 132 districts and 134 districts of drill bit 104, each district is all similarly equipping the groove cutting teeth as the same way as of narrating about 130 districts on their a pair of dike band triple.And, as what in the embodiment of Fig. 4～7, narrated, triple on the contiguous zone in 130-134 district all is that the triple with another district is offset each other, the circular cutting edge road of incision rock structural face can be overlapped, thereby finally form the cutting edge coverage from the bit central to the external diameter.

Technical people with general technical ability can in the situation that does not break away from the spirit and scope of the present invention, make many kinds to scheme and revise and conversion. For example, illustrated although the outline figure of Figure 10 has interrelated with the embodiment of Fig. 6, may have too a similar profile diagram about Fig. 4,5 and 7 graphic triple embodiments to be derived out. Similarly, although each group of the triple embodiment of Fig. 4-10 is planned with two shellfish Rick Rashids (Ballaset) board cutlery and a cylindrical clear shear blade tool, the present invention is not the tooth or the cutlery that are defined as special type as arbitrary tooth in the cutting teeth triple or whole tooth. And, about the embodiment of Fig. 4-7 clearly the azimuthal separation of narration just illustrate usefulness, actual interval may change with every kind of purposes, perhaps also changes within single drill bit, as shown in the embodiment of Figure 10. So the diagram embodiment of having announced just is used for the method that gives an actual example, and should not be considered as the scope of the present invention that institute clearly represents in the following claim that limited.

Errata

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Claims (20)

1, the improvement on a kind of rotary drilling-head is characterized in that: have a bit face to comprise many polycrystalline diamond teeth, comprise:

Many cutlery triple, the whole main cutting teeth on this drill bit is included at least one this triple in fact, and each triple comprises:

At least one pair of that is used to cut groove first and second polycrystalline diamond cutleries.

One the 3rd polycrystalline diamond tooth with this first and second polycrystalline diamonds cutlery collaborative work, be configured in to be used in the middle of first and second teeth clearing up at this first and second tooth and cut out material between the groove, the 3rd tooth is to have azimuth deviation with respect to one in first and second teeth at least.

According to this point, use the cutting process of first, second and the 3rd tooth teamwork grooving, be optimized to this drill bit.

2, according to the improvement of claim 1, wherein said first and second teeth are to be configured on the end face of this drill bit with identical position of orientation in fact, this first and second tooth is radially to separate a determining deviation, and wherein the 3rd tooth azimuth displacement lags behind first and second teeth.

3, according to the improvement of claim 1, wherein said first and second teeth all are ground, orientation to be arranged and radially be configured in each other on the end face of this drill bit.

4, according to the improvement of claim 3, the 3rd tooth that wherein comprises is to have the azimuth displacement to lag behind first tooth and in the front of second tooth.

5, according to the improvement of claim 3, the 3rd tooth that wherein comprises is to have the azimuth displacement to lag behind the first and second two teeth.

6, according to the improvement of claim 1, wherein said first and second teeth all are to be arranged in and to make to be configured as to cut the groove with triangular cross-section.

7, according to the improvement of claim 6, wherein the 3rd tooth is the spark tooth of an artificial polycrystal cylindrical shape.

8, according to the improvement of claim 7, the spark tooth of wherein said artificial polycrystal cylindrical shape is usually axially to be assemblied within the end face of this drill bit, is a full circle cylinder.

9, according to the improvement of claim 7, the spark tooth of wherein said artificial polycrystal cylindrical shape is usually axially to assemble, and is a cylindrical longitudinal profile segment.

10, according to the improvement of claim 1, wherein when this drill bit rotation, each triple cuts different radially circular blade roads, and wherein this corresponding circular blade road partly overlaps.

11, according to the improvement of claim 10, wherein the radial spacing between first and second teeth of each triple leave along with this triple this rotary drilling-head center distance increase and reduce.

12, according to the improvement of claim 11, wherein the radial distance between first and second teeth of said each triple is that the distance of leaving this bit central with this triple is inversely proportional to.

13, according to the improvement of claim 10, wherein diversified tooth all is configured on the end face of this drill bit, thereby constitute the tooth triple of radially adjoining, first tooth of a triple plays the effect of second tooth that radially adjoins triple doubly, therefore two radially adjoin triple and comprise three groove cutting teeths first and second teeth that resemble each triple, and resemble two teeth of the clear end the 3rd tooth of each triple.

14, according to the improvement of claim 1, each all is arranged in wherein said first and second teeth and makes to be configured as and be suitable for cutting groove, first and second teeth are with respect to angled on the tangent plane of each tooth position and this bit face, first and second teeth equate with the angle that the bit face tangent plane is constituted in this tooth position with respect to each tooth, are symmetrical thereby cut out the dike band that groove delimitates by this first and second tooth.

15, a rotary drilling-head comprises:

A drill body;

At least a portion bit face that on drill body, is limited; With

Many artificial polycrystalline diamond cutting elements are configured on the bit face, have at least three above-mentioned polycrystalline diamond cutting elements to be configured to a ditch groove cutting triple, this ditch groove cutting triple is made up of the first and second groove cutting teeths and one the 3rd tooth of the clear end, the 3rd tooth azimuth is configured to lag behind at least a tooth in the first and second groove cutting teeths, and radially is configured in the centre of the radial position of first and second teeth on the bit face.

According to this point, the stock removal action of this triple dissected valley groove is optimized.

16, according to the rotary drilling-head of claim 15, wherein the radial distance between first and second teeth is equal to or less than effective cutting width of the 3rd tooth.

17, according to the rotary drilling-head of claim 16, wherein said the 3rd tooth be by the azimuth be configured in be positioned at this triple on this bit face first tooth after and before second tooth.

18, according to the rotary drilling-head of claim 17, wherein said first tooth and second tooth, its feature generally is the cutting element of triangular cross-section, and wherein the 3rd tooth comprises cylindrical cutting element.

19, use one to have the cutting process of many rotary drilling-heads of artificial polycrystalline diamond arrangements of components on this drill bit to comprise the cutting step that in rock texture, cuts out many circular blades road, each sword road and another sword road are concentrically with respect to one another, and be in the relation that partly overlaps mutually, the step system in each circular blade road of above-mentioned cutting comprises following each step:

Use the first groove cutting teeth in rock texture, to cut out first groove; With

The 3rd tooth that use is followed by the orientation cleans out the circular blade road amount of predetermined rock, and this first dissected valley groove tooth is equivalent to one the 3rd tooth of the clear end.

20,, also further comprise and use second a groove cutting teeth of following the tracks of by the orientation to cut out the step of second groove continuously according to the method for claim 19.

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