CN204782784U - Be applied to diamond bit of shale pneumatic drill well - Google Patents
Be applied to diamond bit of shale pneumatic drill well Download PDFInfo
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- CN204782784U CN204782784U CN201520421524.8U CN201520421524U CN204782784U CN 204782784 U CN204782784 U CN 204782784U CN 201520421524 U CN201520421524 U CN 201520421524U CN 204782784 U CN204782784 U CN 204782784U
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Abstract
The utility model discloses a be applied to diamond bit of shale pneumatic drill well, including the bit body, it has many scrapers to distribute on the bit body, and the profile of scraper includes interior awl, nasal part, outer cone, circular bead and guarantor footpath piece, the direction of rotation that uses scraper when cutting is the place ahead, in the scraper on the bit body, has at least including a front -seat shearing tooth and a back row tooth on the scraper, front -seat shearing tooth is a kind or several kinds in disk shearing tooth, circular inclined plane shearing tooth and the frustum inclined plane shearing tooth, and the back row tooth is the spacing tooth of back row shearing tooth or back row, the back row shearing tooth is the disk shearing tooth, and the spacing tooth in back row is one kind or several kinds in bulb tooth, crew cut tooth and the conical 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.
Description
Technical field
The utility model relates to a kind of diamond bit, particularly relates to a kind of diamond bit that can creep at mud, shale formation being applied to shale gas drilling well.
Background technology
In the shale gas resource of attention in recent years as in the exploitation of unconventional petroleum resources, rig usually creeps at mud shale stratum, most drillng operation can run into bad ground, and in this case, drill bit becomes the key factor that success creeps into and affects drilling efficiency.Application number is the Chinese patent application of " 201410618305.9 ", and propose the PDC drill bit (abbreviation of polycrystalline diamond compact bit) in mud shale stratum drilling well, this drill bit creeps at mud shale stratum, has certain practicality.But, in shale gas drilling well, often can run into hard formation or hard interbedded layer, sometimes also can run into containing siliceous comparatively high abrasive stratum, the PDC drill bit of conventional directional well, mainly realize creeping into by the shearing motion mode of PDC tooth (composite polycrystal-diamond), at nose and the shoulder of drill bit, due to the load diatibution feature of PDC tooth on bit profile, easy premature breakdown, causes the rate of penetration of PDC drill bit to become slowly; Sometimes a new PDC drill bit, in hard interbedded layer drilling well, may there is the situation of nose ring mill, shoulder rounding and drill bit undergauge in drill bit fast; The problem that these all make PDC drill bit exist in hard interbedded layer drilling well, and work is steady, drill bit local cutting teeth overload, torque-on-bit fluctuate, causes drill bit premature failure, can increase drilling cost, reduce drilling efficiency.
Utility model content
The purpose of this utility model is just to provide a kind of diamond bit being applied to shale gas drilling well to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
Be applied to a diamond bit for shale gas drilling well, comprise bit body, described bit body is distributed with many scrapers, the profile of described scraper comprises inner cone, nose, outer cone, shoulder and gauge block, and described scraper is provided with cutting teeth; Direction of rotation when cutting with described scraper, for front, in the described scraper on described bit body, has at least and a scraper comprises toothrow after a kind of front-seat shearing tooth and one; Described front-seat shearing tooth is one or more in disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth, described rear toothrow be rear row's shearing tooth or after arrange limiting tooth; Described rear row's shearing tooth is disk shearing tooth, and described rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth.
Particularly, a scraper is had at least to adopt following structure in all scrapers:
In described scraper on described bit body, at least comprise a scraper, its front toothrow is made up of front-seat disk shearing tooth, and toothrow comprises rear row's disk shearing tooth thereafter; This front-seat disk shearing tooth is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth and cutting face; This rear row's disk shearing tooth is distributed in the nose of this blade profile, outer cone and shoulder, is provided with the back rake angle of 15 ° ~ 30 ° between this rear row's disk shearing tooth and cutting face; The proud exposure of this front-seat disk shearing tooth is greater than the proud exposure of this rear row's disk shearing tooth, and difference in height is between 0 ~ 2.5 millimeter.
Or in the described scraper on described bit body, at least comprise a scraper, its scraper includes front toothrow and rear toothrow, its front toothrow is made up of front-seat disk shearing tooth, and toothrow comprises rear row's limiting tooth thereafter; This front-seat disk shearing tooth is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth and cutting face; This rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth, and this rear row's limiting tooth is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the top rake of-8 ° ~+8 ° between this rear row's limiting tooth and cutting face; The proud exposure of this front-seat disk shearing tooth is greater than the proud exposure of this rear row's limiting tooth, and difference in height is between 0 ~ 2.5 millimeter.
Or in the described scraper on described bit body, at least comprise a scraper, its scraper includes front toothrow and rear toothrow, its front toothrow is made up of front-seat circular sloped surface shearing tooth and/or front-seat frustum inclined-plane shearing tooth, and toothrow comprises rear row's limiting tooth thereafter; This front toothrow is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the back rake angle of 10 ° ~ 25 ° between this front toothrow and cutting face; This rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth, and this rear row's limiting tooth is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the top rake of-8 ° ~+8 ° between this rear row's limiting tooth and cutting face; The proud exposure of this front toothrow is greater than the proud exposure of this rear row's limiting tooth, and difference in height is between 0 ~ 2.5 millimeter.
As preferably, the circle angle angle of cutting sth. askew between bevel and tooth post circular planar lowermost of described circular sloped surface shearing tooth is 5 ° ~ 25 °; The frustum angle angle of cutting sth. askew between bevel and frustum circular planar lowermost of described frustum inclined-plane shearing tooth is 5 ° ~ 25 °; Angle angle between the taper cutting face of described conical tooth and tooth post center line is 28 ° ~ 66 °.
As preferably, in all described cutting teeths, the composite teeth that conical tooth, bulb tooth and 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 shale gas drilling well 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 scraper of conventional PDC drill bit is provided with disk PDC tooth, stratum is cut with cut mode, and realizing the rapid drilling of drill bit according to suitable back rake angle, the assembling form of this disk PDC tooth in bit, the cutting teeth cutting stratum with cut mode is called shearing tooth;
Limiting tooth: the effect of the rear toothrow all restricted PDC drill bit cutting-in of conventional PDC drill bit, is not the assembling form of shearing tooth and the tooth post with restriction PDC drill bit cutting-in function is called limiting tooth, and limiting tooth is generally vertically mounted on the blade profile of PDC drill bit.
Other title according to literal understanding, such as: front-seat shearing tooth is be located at front-seat shearing tooth, and rear row's shearing tooth is the shearing tooth being located at rear row.
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 accommodation of drill bit; The front and back toothrow of same scraper, the ability that improve drill bit design change and select, according to drilling stratum feature, can select suitable structure.
2, adopt scraper type double rows of teeth cloth toothing, preferably suitable proud exposure, what control drill bit often turns cutting-in, can improve the stability of drill bit, is conducive to the control reducing torque ripple and tool-face.
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 of drill bit can be improved, abrasive resistant ability, improve rate of penetration and the bit life of drill bit, reach the object lowering user's drilling cost.
Accompanying drawing explanation
Fig. 1 is the sectional plan view being applied to the diamond bit of shale gas drilling well described in the utility model;
Fig. 2 is one of top view structural representation of the diamond bit of shale gas drilling well described in the utility model;
Fig. 3 is the top view structural representation two of the diamond bit of shale gas drilling well described in the utility model;
Fig. 4 A is the top view structural representation three of the diamond bit of shale gas drilling well described in the utility model;
Fig. 4 B is the top view structural representation four of the diamond bit of shale gas drilling well described in the utility model;
Fig. 4 C is the top view structural representation five of the diamond bit of shale gas drilling well described in the utility model;
Fig. 4 D is the top view structural representation six of the diamond bit of shale gas drilling well described in the utility model;
Fig. 5 is the main TV structure schematic diagram of disk shearing tooth described in the utility model;
Fig. 6 is the plan structure schematic diagram of disk shearing tooth described in the utility model;
Fig. 7 is the main TV structure schematic diagram of circular sloped surface shearing tooth described in the utility model;
Fig. 8 is the plan structure schematic diagram of circular sloped surface shearing tooth described in the utility model;
Fig. 9 is the main TV structure schematic diagram of frustum inclined-plane described in the utility model shearing tooth;
Figure 10 is the plan structure schematic diagram of frustum inclined-plane described in the utility model shearing tooth;
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 main TV structure schematic diagram of the tack tooth in limiting tooth described in the utility model;
Figure 13 is the plan structure schematic diagram of the tack tooth in limiting tooth described in the utility model;
Figure 14 is the main TV structure schematic diagram of the bulb tooth in limiting tooth described in the utility model;
Figure 15 is the plan structure schematic diagram of the bulb tooth in limiting tooth described in the utility model;
Figure 16 is the main TV structure schematic diagram of the conical tooth in limiting tooth described in the utility model;
Figure 17 is the plan structure schematic diagram of the conical tooth in limiting tooth described in the utility model;
Figure 18 is the Change of anteversion schematic diagram of conical tooth on scraper in limiting tooth described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 A, Fig. 4 B, Fig. 4 C and Fig. 4 D, the diamond bit being applied to shale gas drilling well described in the utility model comprises bit body 10, bit body 10 is distributed with many scrapers 11, the profile of scraper 11 comprises inner cone 7, nose 6, outer cone 5, shoulder 4 and gauge block 3, and scraper 11 is provided with cutting teeth 9; Direction of rotation when cutting with scraper 11 is front, in the scraper 11 on bit body 10, has at least and a scraper 11 comprises toothrow after a kind of front-seat shearing tooth and one; Described front-seat shearing tooth is one or more in disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth, described rear toothrow be rear row's shearing tooth or after arrange limiting tooth; Described rear row's shearing tooth is disk shearing tooth, and described rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth; The circle angle angle of cutting sth. askew between bevel and tooth post circular planar lowermost of described circular sloped surface shearing tooth is here 5 ° ~ 25 °; The frustum angle angle of cutting sth. askew between bevel and frustum circular planar lowermost of described frustum inclined-plane shearing tooth is 5 ° ~ 25 °; Angle angle between the taper cutting face of described conical tooth and tooth post center line is 28 ° ~ 66 °.
The chip area 13 between two scrapers 11, the nozzle 8 on bit body 10, center water channel 2 and joint 1 is also show in Fig. 1, joint 1 is processed with connecting thread, during drilling well, diamond bit is connected as a single entity by the screw thread on joint 1 and DHA and carries out drillng operation; These structures are the conventional structure of diamond bit.
Illustrate, said structure is general structure, and according to actual needs, the concrete flute profile of front-seat cutting teeth and rear row's cutting teeth has different change, is specifically described below to the structure of its different change.Illustrate: following various tooth is all the one in cutting teeth 9; May have employed different figure notations to same tooth in following description, be because the tooth in different purposes accompanying drawing might not be one to one.
The utility model the first concrete structure disclosed:
As depicted in figs. 1 and 2, in the scraper 11 on bit body 10, at least comprise a scraper 11, its front toothrow is made up of front-seat disk shearing tooth 15, and toothrow comprises rear row's disk shearing tooth 14 thereafter; This front-seat disk shearing tooth 15 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5, shoulder 4 and gauge block 3, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth 15 and scraper cutting face; This rear row's disk shearing tooth 14 is distributed in the nose 6 of the profile of this scraper 11, outer cone 5 and shoulder 4, is provided with the back rake angle of 15 ° ~ 30 ° between this rear row's disk shearing tooth 14 and cutting face; The proud exposure of this front-seat disk shearing tooth 15 is greater than the proud exposure of this rear row's disk shearing tooth 14, and difference in height is between 0 ~ 2.5 millimeter.
Also show other rear toothrow 12 multiple in Fig. 2, after other, toothrow 12 is tack tooth or bulb tooth.Toothrow 12 is distributed in the inner cone 7 of the profile of scraper 11, nose 6 and shoulder 4 after other; The top rake of-8 ° ~+8 ° is provided with between toothrow 12 and cutting face after other.The proud exposure of front-seat disk shearing tooth 15 is greater than the proud exposure of other rear toothrow 12, and difference in height is between 0 ~ 2.5 millimeter.
The second concrete structure disclosed in the utility model:
As shown in figures 1 and 3, in the scraper 11 on bit body 10, at least comprise a scraper 11, its front toothrow is made up of front-seat disk shearing tooth 15, and toothrow comprises rear row's limiting tooth thereafter, and this rear row's limiting tooth is bulb tooth 18; This front-seat disk shearing tooth 15 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5, shoulder 4 and gauge block 3, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth 15 and cutting face; This bulb tooth 18 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the top rake of-8 ° ~+8 ° between this bulb tooth 18 and cutting face; The proud exposure of this front-seat disk shearing tooth 15 is greater than the proud exposure of this bulb tooth 18, and difference in height is between 0 ~ 2.5 millimeter.
Also show other rear toothrow 12 multiple in Fig. 3, after other, toothrow 12 is tack tooth or bulb tooth.Toothrow 12 is distributed in the inner cone 7 of the profile of scraper 11, nose 6 and shoulder 4 after other; The top rake of-8 ° ~+8 ° is provided with between toothrow 12 and cutting face after other.The proud exposure of front-seat disk shearing tooth 15 is greater than the proud exposure of other rear toothrow 12, and difference in height is between 0 ~ 2.5 millimeter.
The utility model the third concrete structure disclosed:
As shown in Fig. 1 and Fig. 4 A, in the scraper 11 on bit body 10, at least comprise a scraper 11, its scraper 11 at least comprises multiple front-seat disk shearing tooth 15 and multiple rear row's conical tooth 44; This front-seat disk shearing tooth 15 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5, shoulder 4 and gauge block 3, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth 15 and cutting face; This conical tooth 44 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the top rake of-8 ° ~+8 ° between this conical tooth 44 and cutting face; The proud exposure of this front-seat disk shearing tooth 15 is greater than the proud exposure of this conical tooth 44, and difference in height is between 0 ~ 2.5 millimeter.
4th kind of concrete structure disclosed in the utility model:
Composition graphs 1 and Fig. 4 B, in the scraper 11 on bit body 10, at least comprise a scraper 11, and its scraper 11 at least comprises multiple front-seat frustum inclined-planes shearing tooth 45 and multiple rear row's conical tooth 44; This front-seat frustum inclined-plane shearing tooth 45 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the back rake angle of 10 ° ~ 25 ° between this front-seat frustum inclined-plane shearing tooth 45 and cutting face; This rear row's conical tooth 44 is distributed in the inner cone 7 of bit 11 profile, nose 6, outer cone 5 and shoulder 4, is provided with the top rake of-8 ° ~+8 ° between this conical tooth 44 and cutting face; The proud exposure of this front-seat frustum inclined-plane shearing tooth 45 is greater than the proud exposure of this rear row's conical tooth 44, and difference in height is between 0 ~ 2.5 millimeter.
5th kind of concrete structure disclosed in the utility model:
Composition graphs 1 and Fig. 4 C, in the scraper 11 on bit body 10, at least comprise a scraper 11, and its scraper 11 at least comprises multiple front-seat circular sloped surface shearing tooth 48 and multiple rear row's conical tooth 44; This front-seat circular sloped surface shearing tooth 48 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the back rake angle of 10 ° ~ 25 ° between this circular sloped surface shearing tooth 48 and cutting face; This rear row's conical tooth 44 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the top rake of-8 ° ~+8 ° between this rear row's conical tooth 44 and cutting face; The proud exposure of this front-seat circular sloped surface shearing tooth 48 is greater than the proud exposure of this rear row's conical tooth 44, and difference in height is between 0 ~ 2.5 millimeter.
6th kind of concrete structure disclosed in the utility model:
Composition graphs 1 and Fig. 4 D, in the scraper 11 on bit body 10, at least comprise a scraper 11, and its scraper 11 at least comprises multiple front-seat frustum inclined-planes shearing tooth 45 and multiple rear row's hemi-spherical ended shape insert 58; This front-seat frustum inclined-plane shearing tooth 45 is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, is provided with the back rake angle of 10 ° ~ 25 ° between this front toothrow and cutting face; This rear row's hemi-spherical ended shape insert 58 is distributed in the inner cone 7 of bit 11 profile, nose 6, outer cone 5 and shoulder 4, is provided with the top rake of-8 ° ~+8 ° between this rear row's hemi-spherical ended shape insert 58 and cutting face; The proud exposure of this front frustum inclined-plane shearing tooth 45 is greater than the proud exposure of this rear row's hemi-spherical ended shape insert 58, and difference in height is between 0 ~ 2.5 millimeter.
In above-mentioned six kinds of concrete structures, in cutting teeths 9 all on bit body 10, select the composite teeth that conical tooth, bulb tooth and all shearing tooths (comprising disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth) are all preferably polycrystal diamond composite teeth or are manufactured by polycrystalline superabrasive materials in the form.
Cutting teeth accompanying drawing is in above-mentioned six kinds of concrete structures below, and the structure using more multiple tooth, is specifically described below in conjunction with legend:
As shown in Figure 5 and Figure 6, a kind of disk shearing tooth A, comprise the matrix 68 that the disc diamond layer 61 of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form formation, curved surface bonding surface 65 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 A and the cutting face of scraper, be generally called back rake angle, this back rake angle is arranged on the scope between 0 ° ~ 35 °.
As shown in Figure 7 and Figure 8, a kind of circular sloped surface shearing tooth B, cuts shearing tooth for special construction.This tooth has disc inclined-plane diamond layer 71, and disc inclined-plane diamond layer 71 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; The setting course 76 that this tooth also comprises nonplanar bonding surface 74, composite material is formed and the matrix 79 that multiple grain tungsten carbide tool composite material is formed.This tooth is formed in high temperature and high pressure environment.The inclined-plane diamond layer 71 of circular sloped surface shearing tooth B has 5 ° ~+25 ° angles with the baseplane 72 of setting course 76, is arranged on drill bit wing and is equivalent to angle of heel; During drilling well, have the angle of a forward and backward inclination, be generally called back rake angle between circular sloped surface shearing tooth B and the cutting face of scraper, this back rake angle is arranged on the scope between 10 ° ~ 25 °.
As shown in Figure 9 and Figure 10, a kind of frustum inclined-plane shearing tooth C, cuts shearing tooth for special construction.This tooth comprises frustum baseplane 83 and form diamond layer cutting face together with tapered plane 81, the diamond layer cutting face 83 and 81 of frustum inclined-plane shearing tooth C, be made up of polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form, there is shock resistance, abrasive resistant and heat-staple performance; In high temperature and high pressure environment, this tooth is formed together with the matrix 88 that curved surface bonding surface 85 and multiple grain tungsten carbide tool composite material are formed.Angle of heel when frustum inclined-plane shearing tooth C tapered plane 81 and frustum baseplane 83 have the angular range of 5 ° ~+25 ° (or 25 ° ~+75 ° scopes) to be equivalent to drill bit drilling well in bit; Have a forward and backward slanted angle between frustum inclined-plane shearing tooth C and the cutting face of bit, be generally called back rake angle, this back rake angle is arranged on the scope between 10 ° ~ 25 °.
Figure 11 is the back rake angle change schematic diagram of disk shearing tooth A on scraper 11 in Fig. 5, and the change of this back rake angle comprises: plus caster angle, minus caster and 0 degree of back rake angle, D, E in Figure 11 represent the angle of plus caster angle, minus caster respectively.Disk shearing tooth A on scraper 11 back rake angle change be equally applicable to circular sloped surface shearing tooth B and frustum inclined-plane shearing tooth C the back rake angle on scraper 11 change.
As shown in Figure 12 and Figure 13, a kind of tack tooth F, comprises the matrix 97 of cylindrical plane 91 and the formation of multiple grain tungsten carbide tool composite material.Have a forward and backward slanted angle between the axis of tack tooth F and the cutting face of bit, be generally called top rake, this top rake is between-8 ° ~+8 °.
As shown in FIG. 14 and 15, a kind of bulb tooth G, is special diamond tooth, comprises the spherical diamond layer that sphere 101 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 105 and multiple grain tungsten carbide tool composite material are formed.Bulb tooth G also can choose the overall tooth post for tungsten carbide material; Have a forward and backward slanted angle between the axis of bulb tooth G and the cutting face of bit, be generally called top rake, this top rake is between-8 ° ~+8 °.
As shown in Figure 16 and Figure 17, a kind of conical tooth H is special diamond 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 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.Taper surface 111 has an angle 113, the scope of angle between 28 ° ~+66 ° with the axis of conical tooth H.Have a forward and backward slanted angle between the axis of conical tooth H and the cutting face of bit, be generally called top rake, this top rake is between-8 ° ~+8 °.
Figure 18 is the Change of anteversion schematic diagram of conical tooth H axis on scraper 11 in Figure 16, and this Change of anteversion comprises: negative top rake, positive top rake and 0 degree of top rake, and J, K in Figure 18 represent the angle of negative top rake, positive top rake respectively.Conical tooth H axis on scraper 11 Change of anteversion be equally applicable to tack tooth F and the Change of anteversion of bulb tooth G on scraper 11.
Illustrate: in this drill bit in conical tooth and various shearing tooth, there is polycrystalline superabrasive materials in the form; 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; In instances, the catalyst material that polycrystalline superabrasive materials in the form and hard alloy substrate use in the activities of high temp/high pressure (" HTHP "), can form the conical tooth of the polycrystalline superabrasive materials in the form of hope and the disk shearing tooth of polycrystalline superabrasive materials in the form.
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 (8)
1. be applied to a diamond bit for shale gas drilling well, comprise bit body, described bit body is distributed with many scrapers, the profile of described scraper comprises inner cone, nose, outer cone, shoulder and gauge block, and described scraper is provided with cutting teeth; It is characterized in that: direction of rotation when cutting with described scraper, for front, in the described scraper on described bit body, has at least and a scraper comprises toothrow after a kind of front-seat shearing tooth and one; Described front-seat shearing tooth is one or more in disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth, described rear toothrow be rear row's shearing tooth or after arrange limiting tooth; Described rear row's shearing tooth is disk shearing tooth, and described rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth.
2. the diamond bit being applied to shale gas drilling well 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 made up of front-seat disk shearing tooth, and toothrow comprises rear row's disk shearing tooth thereafter; This front-seat disk shearing tooth is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth and cutting face; This rear row's disk shearing tooth is distributed in the nose of this blade profile, outer cone and shoulder, is provided with the back rake angle of 15 ° ~ 30 ° between this rear row's disk shearing tooth and cutting face; The proud exposure of this front-seat disk shearing tooth is greater than the proud exposure of this rear row's disk shearing tooth, and difference in height is between 0 ~ 2.5 millimeter.
3. the diamond bit being applied to shale gas drilling well according to claim 1, is characterized in that: in the described scraper on described bit body, at least comprises a scraper, and its front toothrow is made up of front-seat disk shearing tooth, and toothrow comprises rear row's limiting tooth thereafter; This front-seat disk shearing tooth is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, is provided with the back rake angle of 0 ° ~ 35 ° between this front-seat disk shearing tooth and cutting face; This rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth, and this rear row's limiting tooth is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the top rake of-8 ° ~+8 ° between this rear row's limiting tooth and cutting face; The proud exposure of this front-seat disk shearing tooth is greater than the proud exposure of this rear row's limiting tooth, and difference in height is between 0 ~ 2.5 millimeter.
4. the diamond bit being applied to shale gas drilling well 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 made up of front-seat circular sloped surface shearing tooth and/or front-seat frustum inclined-plane shearing tooth, and toothrow comprises rear row's limiting tooth thereafter; This front toothrow is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the back rake angle of 10 ° ~ 25 ° between this front toothrow and cutting face; The top rake of-8 ° ~+8 ° is provided with between this rear row's limiting tooth and cutting face; This rear row's limiting tooth is one or more in bulb tooth, tack tooth and conical tooth, and this rear row's limiting tooth is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, is provided with the top rake of-8 ° ~+8 ° between this rear row's limiting tooth and cutting face; The proud exposure of this front toothrow is greater than the proud exposure of this rear row's limiting tooth, and difference in height is between 0 ~ 2.5 millimeter.
5. the diamond bit being applied to shale gas drilling well according to claim 1, is characterized in that: the circle angle angle of cutting sth. askew between bevel and tooth post circular planar lowermost of described circular sloped surface shearing tooth is 5 ° ~ 25 °.
6. the diamond bit being applied to shale gas drilling well according to claim 1, is characterized in that: the frustum angle angle of cutting sth. askew between bevel and frustum circular planar lowermost of described frustum inclined-plane shearing tooth is 5 ° ~ 25 °.
7. the diamond bit being applied to shale gas drilling well according to claim 1, is characterized in that: the angle angle between the taper cutting face of described conical tooth and tooth post center line is 28 ° ~ 66 °.
8. according to the diamond bit being applied to shale gas drilling well in claim 1-7 described in any one, it is characterized in that: in all described cutting teeths, the composite teeth that conical tooth, bulb tooth and shearing tooth are polycrystal diamond composite teeth or are manufactured by polycrystalline superabrasive materials in the form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520421524.8U CN204782784U (en) | 2015-06-18 | 2015-06-18 | Be applied to diamond bit of shale pneumatic drill well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520421524.8U CN204782784U (en) | 2015-06-18 | 2015-06-18 | Be applied to diamond bit of shale pneumatic drill well |
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| Publication Number | Publication Date |
|---|---|
| CN204782784U true CN204782784U (en) | 2015-11-18 |
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|---|---|---|---|
| CN201520421524.8U Active CN204782784U (en) | 2015-06-18 | 2015-06-18 | Be applied to diamond bit of shale pneumatic drill well |
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| Country | Link |
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| CN (1) | CN204782784U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370212A (en) * | 2015-12-08 | 2016-03-02 | 大庆天瑞机械制造有限公司 | Anti-vortex polycrystalline diamond compact bit |
| CN106320990A (en) * | 2015-06-18 | 2017-01-11 | 成都百施特金刚石钻头有限公司 | Diamond drill bit applied to shale gas well drilling |
| CN106812469A (en) * | 2015-11-27 | 2017-06-09 | 成都百施特金刚石钻头有限公司 | Diplocardia underreamer body of tool |
| CN108463609A (en) * | 2015-12-18 | 2018-08-28 | 史密斯国际有限公司 | The placement of on-plane surface cutting element |
| US11091960B2 (en) | 2015-12-18 | 2021-08-17 | Schlumberger Technology Corporation | Placement of non-planar cutting elements |
-
2015
- 2015-06-18 CN CN201520421524.8U patent/CN204782784U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106320990A (en) * | 2015-06-18 | 2017-01-11 | 成都百施特金刚石钻头有限公司 | Diamond drill bit applied to shale gas well drilling |
| CN106812469A (en) * | 2015-11-27 | 2017-06-09 | 成都百施特金刚石钻头有限公司 | Diplocardia underreamer body of tool |
| CN105370212A (en) * | 2015-12-08 | 2016-03-02 | 大庆天瑞机械制造有限公司 | Anti-vortex polycrystalline diamond compact bit |
| CN108463609A (en) * | 2015-12-18 | 2018-08-28 | 史密斯国际有限公司 | The placement of on-plane surface cutting element |
| US11091960B2 (en) | 2015-12-18 | 2021-08-17 | Schlumberger Technology Corporation | Placement of non-planar cutting elements |
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