CN204960812U - Novel mix tooth PDC drill bit - Google Patents
Novel mix tooth PDC drill bit Download PDFInfo
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- CN204960812U CN204960812U CN201520730161.6U CN201520730161U CN204960812U CN 204960812 U CN204960812 U CN 204960812U CN 201520730161 U CN201520730161 U CN 201520730161U CN 204960812 U CN204960812 U CN 204960812U
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Abstract
The utility model discloses a novel mix tooth PDC drill bit, including the bit body, it has many scrapers to distribute on the bit body, and the cutting teeth structure profile of scraper includes interior awl, nasal part, outer cone, circular bead and guarantor footpath piece, is equipped with multiple cutting teeth on the many scrapers, direction of rotation when using the scraper cutting in the scraper on the bit body, has at least the front -seat tooth on the scraper to include two kinds of shearing tooths as the place ahead, and the back row tooth on this scraper is at least including a shearing tooth or a spacing tooth, the shearing tooth includes two kinds disk shearing tooths and ridged shearing tooths, and spacing tooth includes two kinds in sphere cylinder tooth and toper cylinder tooth. The utility model discloses a design the drill bit cutting teeth structure that multiple cutting teeth mixes collocation and the control of drill bit knifing, can reduce the moment of torsion fluctuation of drill bit, improve the anti ability of grinding and shocking resistance of drill bit, prolong the life -span of drill bit cutting teeth to improve cutting power, adaptability and the mechanical drilling speed of drill bit, the stability of reinforcing drill bit reduces the drilling cost for the user.
Description
Technical field
The utility model relates to a kind of diamond bit, particularly relates to the novel combination tooth PDC drill bit that a kind of hard formation being applied to oil and natural gas drilling well creeps into.
Background technology
In the exploration and development of oil and natural gas resource in recent years; deep drilling and ultradeep well become the main force of improving petrol resources exploitation; in such oil/gas drilling; usually can run into hard formation and abrasive layer; therefore improve the bit speed of hard formation and abrasive layer, become the important channel and the method that shorten drilling period and reduce drilling cost.People know, in hard formation and abrasive layer drilling well, in order to improve the stability of drill bit and extend the application life of drill bit, the method increasing the pressure of the drill usually can be adopted to realize improving bit speed.The bite type can selected for people is divided into rock bit and fixed cutter drill bits, in drilling practice, it is found that, rock bit drilling well in hard formation and abrasive layer, due to the bearing life of rock bit and the feature of gear wheel cutting teeth broken formation, the repetition of drilling cuttings in shaft bottom is broken, often cause this drill bit in deep-well and ultra-deep well drilling, make the rate of penetration of rock bit low short with the life-span, the round trip time that frequent more bit change brings is long, add drilling period and improve labour intensity, considerably increasing drilling cost.Soft in medium hardness strata drilling, the drilling well of first-selected PDC drill bit has become the behavioral standard of oil drilling industry; But, at drilling practice, vibrations drill bit what strata drilling in office all can produce, the vibrations occurred at hard formation drilling bit are even more serious, can produce drill bit " convolution ", can cause the serious premature wear of PDC drill bit, and passivation or the drill bit that can accelerate drill bit lost efficacy; More bit change can increase, the tripping operation time, can drilling cost be increased.
In comparatively hard formation drilling well, stability of bit becomes increasing challenge; People do not wish that the vibrations of drill bit bring passivation or the inefficacy of drill bit, and it can cause unnecessary trip-out.Existing drill bit design scheme, there is part can adapt to the strata drilling of Different Strata hardness, drill bit suitably can improve rate of penetration and acceptable bit life and durability, more previous drill bit design, usual employing increases the pressure of the drill to reduce the vibrations of drill bit, such as, some drill bit design adopts low aggressive back rake angle to creep into hard formation, and such design is crept into must increase the pressure of the drill at hard formation.But at use PDC drill bit drilling process, people do not wish to use high the pressure of the drill, because increase the pressure of the drill, the length of drill collar be increased, just add the pressure loss of drill string, pressure and the power consumption of pump can be increased, the wearing and tearing of centralizer and drill string can be increased, reduce drilling efficiency and drilling cost.In drilling well simultaneously, increase the pressure of the drill, the wearing and tearing of drill bit and the speed of drill bit rust can be accelerated, the quantity using drill bit can be increased; Under the condition that drill bit has worn and torn, the service time of drill bit be extended, in order under acceptable drilling speed condition, only have increase the pressure of the drill, because the relation between the wearing and tearing of drill bit and the pressure of the drill is not linear relationship, but exponential relationship; The thermal wear of tooth and impact failure in particular formation, under existing the pressure of the drill, increase the pressure of the drill of little value, sharply will accelerate the wearing and tearing of Cutter, because can accelerate the damage of tooth.
Therefore, increase the speed of hard formation drilling well, previous drill bit design thinking will be changed, select more profile of tooth and more cutting teeth cloth toothing, change drill bit wedging mode and wearing and tearing feature, increase drill bit abrasive resistant ability and working life, the durability increasing cutting teeth extends bit life, use the design of multiple profile of tooth to meet drillng operation effectively aggressive to hard formation, improve the drilling speed that new drill structure remains higher.
Utility model content
The purpose of this utility model is just to provide a kind of novel combination tooth PDC drill bit to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
A kind of novel combination tooth PDC drill bit, comprise bit body, described bit body is distributed with many scrapers, the cutting teeth structure outline of described scraper comprises inner cone, nose, outer cone, shoulder and gauge block, and many described scrapers are provided with multiple cutting teeth; Direction of rotation when cutting with described scraper is for front, and in the described scraper on described bit body, have at least the front toothrow on a scraper to comprise two kinds of shearing tooths, the rear toothrow on this scraper at least comprises a kind of shearing tooth or a kind of limiting tooth; Described shearing tooth comprises disk shearing tooth and ridged shearing tooth two kinds, and described limiting tooth comprises sphere Cylinder Gear and two kinds, tapered cylinder tooth.
As preferably, in described scraper on described bit body, at least comprise a scraper, its front toothrow is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, its front toothrow is made up of disk shearing tooth and ridged shearing tooth, the disk shearing tooth on same scraper and ridged shearing tooth spaced apart; The rear toothrow of this scraper at least comprises a kind of shearing tooth or a kind of limiting tooth.
As preferably, shearing tooth in the rear toothrow of described scraper comprises disk shearing tooth and the ridged shearing tooth of inner cone, nose, outer cone, shoulder and the gauge block being distributed in this blade profile, and the limiting tooth in described rear toothrow is distributed in the inner cone of this blade profile of drill bit, nose, outer cone and shoulder position.
Or, the every bar scraper on described bit body is equipped with and forms front toothrow and multiple rear toothrow by multiple shearing tooth; Front-seat shearing tooth on every bar scraper and be provided with the back rake angle of 0 ° ~ 30 ° between cutting face; Shearing tooth in rear toothrow on every bar scraper and be provided with the back rake angle of 15 ° ~ 37 ° between cutting face; Limiting tooth in rear toothrow on every bar scraper and be provided with the top rake of-8 ° ~+8 ° between cutting face.
Or, the every bar scraper on described bit body is equipped with multiple front toothrow and multiple rear toothrow; The proud exposure of the front toothrow on every bar scraper is greater than the proud exposure of rear toothrow, and difference in height is between 0 ~ 3 millimeter.
As preferably, in all described cutting teeths, the composite teeth that tapered cylinder tooth, sphere Cylinder Gear, disk shearing tooth and ridged shearing tooth are polycrystal diamond composite teeth or are manufactured by polycrystalline superabrasive materials in the form.
In above-mentioned all structures, the title implication of each cutting teeth is as follows:
Front toothrow: in oil/gas drilling in recent years, the scraper of the conventional PDC drill bit of use usually adopts the cloth tooth mode of double rows of teeth, and direction of rotation when cutting with scraper is front, toothrow before the cutting teeth arranged at scraper front row is commonly referred to;
Rear toothrow: corresponding with front toothrow, toothrow after the cutting teeth put of arranging after scraper is commonly referred to;
Shearing tooth: the cutting teeth cutting stratum with cut mode is referred to as shearing tooth.The scraper of conventional PDC drill bit is provided with disk PDC tooth, cuts stratum with cut mode, and realize the rapid drilling of drill bit according to suitable back rake angle and angle of heel, the assembling form of this disk PDC tooth in bit is called disk shearing tooth; Above-mentioned ridged shearing tooth, matrix material and shape are all identical with disk shearing tooth, and the mounting means in bit is also identical with disk shearing tooth, and the same back rake angle and angle of heel also can be used to be described.But the cutting face of ridged shearing tooth is different from disk shearing tooth, concrete structure is shown in described in following detailed description of the invention; In addition, disk shearing tooth only has an angle of heel or 0 ° of angle of heel, and ridged shearing tooth has two angles of heel, and one is interior angle of heel, and another is outer angle of heel.
Limiting tooth: the effect of the rear toothrow all restricted PDC drill bit cutting-in of conventional PDC drill bit, the assembling form of different shearing tooth and the tooth post with restriction PDC drill bit cutting-in function is called limiting tooth, limiting tooth is generally vertically mounted on the blade profile of PDC drill bit.
The beneficial effects of the utility model are:
The bit cutting toothing that the utility model is controlled by the multiple cutting teeth mix and match of design and drill bit cutting-in, the torque ripple of drill bit can be reduced, improve drill bit abrasive resistant and shock proof ability, extend the life-span of Cutter, and improve the cutting power of drill bit, adaptive capacity and rate of penetration, strengthen the stability of drill bit, for user reduces drilling cost; Be embodied in:
1, adopt scraper type double rows of teeth cloth toothing, improve the permanent tooth quality of drill bit; The front and back toothrow of same scraper is arranged, the ability that improve drill bit design change and select, according to drilling stratum feature, can select suitable structure.Front toothrow selects disk/ridged shearing tooth mix and match combination, changes disk or ridged shearing tooth structure single structure feature, enhances the structural stability of drill bit.
2, scraper type double rows of teeth cloth toothing is adopted, select the combination of suitable forward and backward toothrow: preferably suitable proud exposure, what control drill bit often turns cutting-in, can improve the stability of drill bit, be conducive to the control that drill bit reduces torque ripple and tool-face, be conducive to extending bit life.
3, adopt scraper type double rows of teeth cloth toothing, according to the operating type of directional well and horizontal well drilling, suitable blade profile structure can be adopted; According to hardness and the abrasiveness feature on stratum, select different cutting teeth type application at the diverse location of blade profile; According to the feature of different tooth and broken rock feature, the shock resistance improving drill bit can be conducive to, abrasive resistant ability, improve rate of penetration and the bit life of drill bit, reach the object reducing drilling cost.
Accompanying drawing explanation
Fig. 1 is the sectional structure front view of novel combination tooth PDC drill bit described in the utility model;
Fig. 2 is the top view structural representation of the novel combination tooth PDC drill bit described in the utility model embodiment 1;
Fig. 3 is the top view structural representation of the novel combination tooth PDC drill bit described in the utility model embodiment 2;
Fig. 4 is the top view structural representation of the novel combination tooth PDC drill bit described in the utility model embodiment 3;
Fig. 5 A is the main TV structure schematic diagram of disk shearing tooth described in the utility model;
Fig. 5 B is the left TV structure schematic diagram of disk shearing tooth described in the utility model;
Fig. 6 A is one of main TV structure schematic diagram of ridged shearing tooth described in the utility model;
Fig. 6 B is one of left TV structure schematic diagram of ridged shearing tooth described in the utility model;
Fig. 7 A is the main TV structure schematic diagram two of ridged shearing tooth described in the utility model;
Fig. 7 B is the left TV structure schematic diagram two of ridged shearing tooth described in the utility model;
Fig. 8 A is the main TV structure schematic diagram three of ridged shearing tooth described in the utility model;
Fig. 8 B is the left TV structure schematic diagram three of ridged shearing tooth described in the utility model;
Fig. 9 A is the main TV structure schematic diagram of sphere Cylinder Gear described in the utility model;
Fig. 9 B is the left TV structure schematic diagram of sphere Cylinder Gear described in the utility model;
Figure 10 A is the main TV structure schematic diagram of tapered cylinder tooth described in the utility model;
Figure 10 B is the left TV structure schematic diagram of tapered cylinder tooth described in the utility model;
Figure 11 is the back rake angle change schematic diagram of disk shearing tooth described in the utility model on scraper;
Figure 12 is the Change of anteversion schematic diagram of tapered cylinder tooth on scraper in limiting tooth described in the utility model;
Figure 13 is the top rake schematic diagram of tapered cylinder tooth on scraper in the back rake angle of ridged shearing tooth described in the utility model and limiting tooth, shows the cutting-in height change of forward and backward toothrow simultaneously.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, novel combination tooth PDC drill bit described in the utility model comprises bit body 8, bit body 8 is distributed with many scrapers 13, the cutting teeth structure outline of scraper 13 comprises inner cone 1, nose 2, outer cone 3, shoulder 4 and gauge block 5, and many scrapers 13 are provided with multiple cutting teeth; Direction of rotation when cutting with scraper 13 is front, in scraper 13 on bit body 8, the front toothrow on a scraper 13 is had at least to comprise two kinds of shearing tooths, as: front-seat shearing tooth comprises disk shearing tooth 10 and ridged shearing tooth 11 two kinds, and the rear toothrow (description see Fig. 2, Fig. 3 and Fig. 4) on this scraper 13 at least comprises a kind of shearing tooth or a kind of limiting tooth; Shearing tooth comprises disk shearing tooth and ridged shearing tooth two kinds, and described limiting tooth comprises sphere Cylinder Gear and two kinds, tapered cylinder tooth.The nozzle passage 9 on bit body 8, bit central runner 6 and drill bit male thread joint 7 is also described in Fig. 1, passive gauge teeth 15, nozzle passage 9 can install nozzle (not display), and during drilling well, drill bit male thread joint 7 links together with drill string (not showing in figure).In drilling process, bit central runner 6 can provide drilling fluid through nozzle passage 9, drilling fluid is by nozzle directive shaft bottom, drilling fluid can leave shaft bottom by cutting carring with cooling cutting teeth (comprising disk shearing tooth 10 and ridged shearing tooth 11) in bottom-hole cleaning, flows through on chip area 17 and returns annular space arrival ground.
Three kinds of overall structures of novel combination tooth PDC drill bit described in the utility model are introduced below respectively by three embodiments, the wherein scraper 20 of Fig. 2, the scraper 40 of Fig. 3, the scraper 60 of Fig. 4 is corresponding with the scraper 13 in Fig. 1 respectively, the disk shearing tooth 27 of Fig. 2 and ridged shearing tooth 25, the disk shearing tooth 47 of Fig. 3 and ridged shearing tooth 45, the disk shearing tooth 67 of Fig. 4 and ridged shearing tooth 65 are corresponding with the disk shearing tooth 10 in Fig. 1 and ridged shearing tooth 11 respectively, the nozzle passage 21 of Fig. 2 and chip area 23, the nozzle passage 44 of Fig. 3 and chip area 42, the nozzle passage 64 of Fig. 4 and chip area 62 are corresponding with the nozzle passage 9 in Fig. 1 and chip area 17 respectively, the change of this reference numerals is to be described for different structure, and its essence is all the same.
Embodiment 1:
As depicted in figs. 1 and 2, bit body 8 comprises many scrapers 20, at least comprise a scraper 20, its front toothrow is made up of disk shearing tooth 27 and ridged shearing tooth 25; On same scraper 20 disk shearing tooth 27 and ridged shearing tooth 25 spaced apart, namely disk shearing tooth 27 then a slice ridged shearing tooth 25 distribute and repeat this process again Disk shearing tooth 27 and ridged shearing tooth 25 are all distributed in the inner cone 1 of the profile of this scraper 20, nose 2, outer cone 3, shoulder 4 and gauge block 5; The rear toothrow of this scraper 20 at least comprises a kind of limiting tooth 29, and limiting tooth 29 is sphere Cylinder Gear.Disk shearing tooth 27 and all have back rake angle (with reference to Figure 11) between ridged shearing tooth 25 and scraper cutting face, the value of back rake angle changes between 5 ~ 30 °; The mounting means of the limiting tooth 29 on scraper 20 is different from disk shearing tooth 27, and have top rake (with reference to Figure 12) between the axis of limiting tooth 29 and the cutting face of scraper 20, the value of top rake changes between-8 ~+8 °; The disk shearing tooth 27 of this scraper 20 and the proud exposure of ridged shearing tooth 25 are greater than the proud exposure of the limiting tooth 29 of rear row, and difference in height is between 0 ~ 3 millimeter.In fig. 2, have nozzle passage 21, provide drilling fluid bottom-hole cleaning and cooling cutting teeth during drilling well, drilling fluid carries drilling cuttings and leaves shaft bottom return annular space to ground on chip area 23.Passive gauge teeth 15 is positioned at the front row of the gauge block 5 of blade profile in FIG, and it is disk shearing tooth.
Embodiment 2:
As shown in figures 1 and 3, bit body 8 comprises many scrapers 40, at least comprise a scraper 40, its front toothrow is made up of disk shearing tooth 45 and ridged shearing tooth 47, disk shearing tooth 45 on same scraper 40 and ridged shearing tooth 47 spaced apart, namely disk shearing tooth then a slice ridged shearing tooth distribute and repeat this process Disk shearing tooth 45 and ridged shearing tooth 47 are all distributed in the inner cone 1 of the profile of this scraper 40, nose 2, outer cone 3, shoulder 4 and gauge block 5, the rear toothrow of this scraper 40 comprises two kinds of limiting tooths, and two kinds of limiting tooths are ball roller tooth 49 and tapered cylinder tooth 51 respectively.Ball roller tooth 49 is distributed in inner cone 1, the nose 2 of the profile of scraper 40; Tapered cylinder tooth 51 is distributed in the nose 2 of the profile of scraper 40, outer cone 3 and shoulder 4.As another distressed structure, tapered cylinder tooth 51 can be distributed in inner cone 1, nose 2, outer cone 3, the shoulder 4 of the profile of this scraper 40.As a kind of distressed structure, ball roller tooth 49 and tapered cylinder tooth 51 can interaction arrangement in the rear row of scraper 40; Ball roller tooth 49 and tapered cylinder tooth 51 can be distributed in inner cone 1, nose 2, outer cone 3, the shoulder 4 of the profile of scraper 40.Disk shearing tooth 45 on scraper 40 and all have back rake angle (with reference to Figure 11) between ridged shearing tooth 47 and scraper cutting face, the value of back rake angle changes between 5 ~ 30 °; After on scraper 40, the ball roller tooth 49 of row and the mounting means of tapered cylinder tooth 51 are different from disk shearing tooth 45, there is top rake (with reference to Figure 12) in the axis of ball roller tooth 49 and tapered cylinder tooth 51 and scraper 40 cutting face, and the value of top rake changes between-8 ~+8 °; This scraper 40 front-seat disk shearing tooth 45 and ridged shearing tooth 47 proud exposure are greater than the ball roller tooth 49 of rear row and the proud exposure of tapered cylinder tooth 51, and difference in height is between 0 ~ 3 millimeter.In figure 3, there is nozzle flow channel 44 that drilling fluid can be provided to pass through.There is provided drilling fluid bottom-hole cleaning and cooling cutting teeth during drilling well, drilling fluid carries drilling cuttings and leaves shaft bottom return annular space to ground on chip area 42.Passive gauge teeth 15 is positioned at the front row of the gauge block 5 of blade profile in FIG, and it is disk shearing tooth.
Embodiment 3:
As shown in Figure 1 and Figure 4, bit body 8 comprises many scrapers 60, at least comprise a scraper 60, its front toothrow is made up of disk shearing tooth 66 and ridged shearing tooth 68, disk shearing tooth 66 on same scraper 60 and ridged shearing tooth 68 spaced apart, namely disk shearing tooth then a slice ridged shearing tooth distribute and repeat this process Disk shearing tooth 66 is distributed in the inner cone 1 of the profile of this scraper 60, nose 2, outer cone 3, shoulder 4 and gauge block 5; Ridged shearing tooth 68 is distributed in inner cone 1, nose 2, outer cone 3, the shoulder 4 of the profile of this scraper 60; The rear toothrow of this scraper 60 comprise the disk shearing tooth 70 of rear row and ridged shearing tooth 72 and two kinds of tooth interaction arrangement in nose 2, outer cone 3, the shoulder 4 of scraper 60 profile; The rear toothrow of this scraper 60 also comprises limiting tooth, and limiting tooth is ball roller tooth 74 and is distributed in the inner cone 1 of the profile of scraper 60, nose 2; Select as one, the ball roller tooth 74 of this scraper 60 can be replaced by tapered cylinder tooth.
The disk shearing tooth 66 at the front row on scraper 60 and have back rake angle (with reference to Figure 11) between ridged shearing tooth 68 and scraper cutting face, the value of back rake angle changes between 5 ~ 30 °; The disk shearing tooth 70 of the rear row of this scraper 60 and have back rake angle (with reference to Figure 11) between ridged shearing tooth 72 and scraper cutting face, the value of back rake angle changes between 15 ~ 37 °; The mounting means of the ball roller tooth 74 of the rear row on scraper 60 is different from disk shearing tooth 66, and have top rake (with reference to Figure 12) between the axis of ball roller tooth 74 and scraper cutting face, the value of top rake changes between-8 ~+8 °; The proud exposure of ball roller tooth 74, disk shearing tooth 70 and ridged shearing tooth 72 that the disk shearing tooth 66 at this scraper 60 front row and the proud exposure of ridged shearing tooth 68 are arranged after being greater than this scraper 60, difference in height is between 0 ~ 3 millimeter.In the diagram, have nozzle flow channel 64, provide drilling fluid bottom-hole cleaning and cooling cutting teeth during drilling well, drilling fluid carries drilling cuttings and leaves shaft bottom return annular space to ground on chip area 62.Passive gauge teeth 15 is positioned at the front row of the gauge block 5 of blade profile in FIG, and it is disk shearing tooth.
In above-mentioned three embodiments, in cutting teeths all on bit body 8, the composite teeth that tapered cylinder tooth 51, ball roller tooth 29,49 and 74, disk shearing tooth 27,66 and 70, ridged shearing tooth 47,68 and 72 are polycrystal diamond composite teeth or are manufactured by polycrystalline superabrasive materials in the form.
Below in conjunction with accompanying drawing to several use the structure of more tooth is specifically described:
As fig. 5 a and fig. 5b, a kind of disk shearing tooth, comprise the matrix 77 that the disc diamond layer 75 of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form formation, curved surface bonding surface 79 and multiple grain tungsten carbide tool composite material are formed, formed in high temperature and high pressure environment.Have the angle of a forward and backward inclination between disk shearing tooth and the cutting face of scraper, be generally called back rake angle (with reference to Figure 11), this back rake angle is arranged on the scope between 5 ° ~ 30 °.It is a kind of disk shearing tooth in embodiment 1,2,3.
As shown in Figure 6 A and 6 B, the first ridged shearing tooth, comprise the matrix 87 that two arc surfaces 83, curved surface bonding surface 85 and multiple grain tungsten carbide tool composite material outside the ridged diamond layer 80 of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form formation, ridge rib 89, ridge rib 89 are formed, formed in high temperature and high pressure environment.The ridge rib 89 of ridged shearing tooth can be biased symmetrical center line 1 ~ 1.5 millimeter, and the width of ridge rib 89 can be 1.5 ~ 2.5 millimeters.Have the angle of a forward and backward inclination between ridged shearing tooth and the cutting face of scraper, be generally called back rake angle (with reference to Figure 11), this back rake angle is arranged on the scope between 5 ° ~ 30 °.It is a kind of ridged shearing tooth in embodiment 1,2,3.
As shown in figures 7 a and 7b, the second ridged shearing tooth, comprise the matrix 97 that two tapered planes 92, curved surface bonding surface 95 and multiple grain tungsten carbide tool composite material outside the ridged diamond layer 90 of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form formation, ridge rib 99, ridge rib 99 are formed, formed in high temperature and high pressure environment.The ridge rib 99 of ridged shearing tooth can be biased symmetrical center line 1 ~ 1.5 millimeter, and the width of ridge rib 99 can be 1.5 ~ 2.5 millimeters.Have the angle of a forward and backward inclination between ridged shearing tooth and scraper cutting face, be generally called back rake angle (with reference to Figure 11), this back rake angle is arranged on the scope between 5 ° ~ 30 °.It is a kind of ridged shearing tooth in embodiment 1,2,3.
As shown in Figure 8 A and 8 B, the third ridged shearing tooth, comprise two tapered planes 102 (burnishing surface) outside ridged diamond layer 104 (being made up of the face of cylinder and frustum face) that polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form form, ridge rib 100, ridge rib 100 and/or two cambered surfaces 106, matrix 105 that multiple grain tungsten carbide tool composite material is formed, can be formed in high temperature and high pressure environment.The ridge rib 100 of ridged shearing tooth can be biased symmetrical center line 1 ~ 1.5 millimeter, and the width of ridge rib 100 can be 2 ~ 3 millimeters.Have the angle of a forward and backward inclination between ridged shearing tooth and scraper cutting face, be generally called back rake angle (with reference to Figure 11), this back rake angle is arranged on the scope between 5 ° ~ 30 °.It is a kind of ridged shearing tooth in embodiment 1,2,3.
As shown in fig. 9 a and fig. 9b, a kind of ball roller tooth, comprise the spherical diamond layer that sphere 108 is formed, this diamond layer is made up of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form, has shock resistance, abrasive resistant and heat-staple performance; In high temperature and high pressure environment, this tooth is formed together with the matrix 107 that on-plane surface bonding surface 109 and multiple grain tungsten carbide tool composite material are formed.Ball roller tooth also can choose the overall tooth post for tungsten carbide material; Have an angle between the axis of ball roller tooth and scraper cutting face, be generally called top rake (with reference to Figure 12), this top rake is between-8 ° ~+8 °.It is the rear row's limiting tooth on the scraper in above-mentioned example.
As shown in Figure 10 and Figure 10 B, a kind of tapered cylinder tooth, comprise the conical surface diamond layer that taper surface 111 is formed, this conical surface diamond layer is made up of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form, has shock resistance, abrasive resistant and heat-staple performance; In high temperature and high pressure environment, this tapered cylinder tooth is formed together with the matrix 118 that on-plane surface bonding surface 115 and multiple grain tungsten carbide tool composite material are formed.An angle 113 is had, the scope of angle between 28 ° ~+66 ° between the axis of taper surface 111 and tapered cylinder tooth.Have an angle between the axis of tapered cylinder tooth and scraper cutting face, be generally called top rake, this top rake is between-8 ° ~+8 °.It is the rear row's limiting tooth in above-described embodiment on scraper.
Figure 11 shows the layout of disk shearing tooth on scraper in Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5 A Fig. 5 B, the back rake angle change schematic diagram of disk shearing tooth when bit cuts stratum, the change of this back rake angle comprises: three kinds of forms of plus caster angle, 0 degree of back rake angle and minus caster; D, E in Figure 11 represent the angle of plus caster angle, minus caster respectively.The back rake angle change of disk shearing tooth in figs. 2,3 and 4 on scraper 20, scraper 40 and scraper 60 is equally applicable to the back rake angle change of ridged shearing tooth on scraper 20, scraper 40 and scraper 60.
Figure 12 describes the Change of anteversion schematic diagram of axis on scraper 40 of the tapered cylinder tooth in Fig. 3 and Figure 10 A Figure 10 B, this Change of anteversion comprises: negative top rake, positive top rake and 0 degree of top rake, and J, K in Figure 12 represent the angle of negative top rake, positive top rake respectively.In figure 3 the axis of tapered cylinder tooth 51 on scraper 40 top rake between-8 ° ~+8 °, change the Change of anteversion of the ball roller tooth 29,49 and 74 on the scraper 20 be equally applicable in Fig. 2, Fig. 3 and Fig. 4, scraper 40 and scraper 60.
Figure 13 describes the cutting characteristic of ridged shearing tooth, and scraper is furnished with back rake angle D, and back rake angle D changes between 5 ° ~+30 °; Describe tapered cylinder tooth when arranging on scraper simultaneously, have top rake K to change between-8 ° ~+8 °.The proud exposure describing front-seat ridged shearing tooth is higher than the proud exposure of the tapered cylinder tooth of rear row, has height difference H (changing between 0 ~ 3 millimeter).Equally, the tapered cylinder tooth in Figure 13 can be replaced with ball roller tooth, and ball roller tooth is used as rear row's limiting tooth of scraper, has top rake and the proud exposure of tapered cylinder tooth.
Disk shearing tooth in diamond bit in the utility model and ridged shearing tooth, and tapered cylinder tooth and ball roller tooth have diamond layer, there is polycrystalline superabrasive materials in the form in described diamond layer; Polycrystalline superabrasive materials in the form comprises the mixing of diamond and natural diamond particles, diamond and natural diamond monocrystalline and particulate, containing polycrystalline superabrasive materials in the form such as cubic boron nitrides; Various cutting teeth comprises the catalyst material that polycrystalline superabrasive materials in the form and hard alloy substrate use in the activities of high temp/high pressure (" HTHP "), the ridged shape tooth of the polycrystalline superabrasive materials in the form of hope and the disk shearing tooth of polycrystalline superabrasive materials in the form can be formed, tapered cylinder tooth and ball roller tooth can be formed equally.
In the activities of the high temp/high pressure (" HTHP ") of above-mentioned formation polycrystalline superabrasive materials in the form, complete in the forcing press of heatable high temp/high pressure.Under general high temperature reaches the temperature condition of 1420 DEG C, under the high pressure condition of high pressure greatly between 5.5GPa ~ 7.8GPa; Although the exact operations parameter of high temp/high pressure (HTHP) technique changes according to the concrete composition of various materials used and quantity.Pressure in the forcing press of high temp/high pressure can under specifically constant high temp/high pressure (" the HTHP ") condition of setting, remain large within the time of 50 seconds ~ 21 minutes, the conical tooth of polycrystalline superabrasive materials in the form and the disk shearing tooth of polycrystalline superabrasive materials in the form can be formed.
Above-described embodiment is preferred embodiment of the present utility model; it is not the restriction to technical solutions of the utility model; as long as without the technical scheme that creative work can realize on the basis of above-described embodiment, all should be considered as falling within the scope of the rights protection of the utility model patent.
Claims (6)
1. a novel combination tooth PDC drill bit, comprises bit body, described bit body is distributed with many scrapers, and the cutting teeth structure outline of described scraper comprises inner cone, nose, outer cone, shoulder and gauge block, and many described scrapers are provided with multiple cutting teeth; It is characterized in that: direction of rotation when cutting with described scraper is for front, and in the described scraper on described bit body, have at least the front toothrow on a scraper to comprise two kinds of shearing tooths, the rear toothrow on this scraper at least comprises a kind of shearing tooth or a kind of limiting tooth; Described shearing tooth comprises disk shearing tooth and ridged shearing tooth two kinds, and described limiting tooth comprises sphere Cylinder Gear and two kinds, tapered cylinder tooth.
2. novel combination tooth PDC drill bit according to claim 1, it is characterized in that: in the described scraper on described bit body, at least comprise a scraper, its front toothrow is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, its front toothrow is made up of disk shearing tooth and ridged shearing tooth, the disk shearing tooth on same scraper and ridged shearing tooth spaced apart; The rear toothrow of this scraper at least comprises a kind of shearing tooth or a kind of limiting tooth.
3. novel combination tooth PDC drill bit according to claim 2, it is characterized in that: the shearing tooth in the rear toothrow of described scraper comprises disk shearing tooth and the ridged shearing tooth of inner cone, nose, outer cone, shoulder and the gauge block being distributed in this blade profile, the limiting tooth in described rear toothrow is distributed in the inner cone of this blade profile of drill bit, nose, outer cone and shoulder position.
4. novel combination tooth PDC drill bit according to claim 1, is characterized in that: the every bar scraper on described bit body is equipped with and forms front toothrow and multiple rear toothrow by multiple shearing tooth; Front-seat shearing tooth on every bar scraper and be provided with the back rake angle of 0 ° ~ 30 ° between cutting face; Shearing tooth in rear toothrow on every bar scraper and be provided with the back rake angle of 15 ° ~ 37 ° between cutting face; Limiting tooth in rear toothrow on every bar scraper and be provided with the top rake of-8 ° ~+8 ° between cutting face.
5. novel combination tooth PDC drill bit according to claim 1, is characterized in that: the every bar scraper on described bit body is equipped with multiple front toothrow and multiple rear toothrow; The proud exposure of the front toothrow on every bar scraper is greater than the proud exposure of rear toothrow, and difference in height is between 0 ~ 3 millimeter.
6. according to novel combination tooth PDC drill bit described in any one in claim 1-5, it is characterized in that: in all described cutting teeths, the composite teeth that tapered cylinder tooth, sphere Cylinder Gear, disk shearing tooth and ridged shearing tooth are polycrystal diamond composite teeth or are manufactured by polycrystalline superabrasive materials in the form.
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| CN201520730161.6U CN204960812U (en) | 2015-09-18 | 2015-09-18 | Novel mix tooth PDC drill bit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520730161.6U CN204960812U (en) | 2015-09-18 | 2015-09-18 | Novel mix tooth PDC drill bit |
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| CN204960812U true CN204960812U (en) | 2016-01-13 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545299A (en) * | 2015-09-18 | 2017-03-29 | 成都百施特金刚石钻头有限公司 | A kind of new combination tooth PDC drill bit |
| CN106837183A (en) * | 2017-03-24 | 2017-06-13 | 湖南泰鼎新材料有限责任公司 | A kind of special-shaped composite superhard material body and its preparation technology and drill bit |
| CN109424323A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of orientation CDE drill bit suitable for ground consisting of hard rock |
| CN109779533A (en) * | 2019-03-29 | 2019-05-21 | 莱州市原野科技有限公司 | PDC drill bit |
| CN110185399A (en) * | 2019-06-19 | 2019-08-30 | 西南石油大学 | A kind of omnidirectional's angle PDC drill bit slowing down broken rock impact force |
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2015
- 2015-09-18 CN CN201520730161.6U patent/CN204960812U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545299A (en) * | 2015-09-18 | 2017-03-29 | 成都百施特金刚石钻头有限公司 | A kind of new combination tooth PDC drill bit |
| CN106837183A (en) * | 2017-03-24 | 2017-06-13 | 湖南泰鼎新材料有限责任公司 | A kind of special-shaped composite superhard material body and its preparation technology and drill bit |
| CN109424323A (en) * | 2017-08-31 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of orientation CDE drill bit suitable for ground consisting of hard rock |
| CN109779533A (en) * | 2019-03-29 | 2019-05-21 | 莱州市原野科技有限公司 | PDC drill bit |
| CN110185399A (en) * | 2019-06-19 | 2019-08-30 | 西南石油大学 | A kind of omnidirectional's angle PDC drill bit slowing down broken rock impact force |
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