CN106320990A - Diamond drill bit applied to shale gas well drilling - Google Patents
Diamond drill bit applied to shale gas well drilling Download PDFInfo
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- CN106320990A CN106320990A CN201510338714.8A CN201510338714A CN106320990A CN 106320990 A CN106320990 A CN 106320990A CN 201510338714 A CN201510338714 A CN 201510338714A CN 106320990 A CN106320990 A CN 106320990A
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Abstract
The invention discloses a diamond drill bit applied to shale gas well drilling. The diamond drill bit comprises a drill bit body. A plurality of scrapers are distributed on the drill bit body. As for the contour, each scraper comprises an inner cone, a nose part, an outer cone, a shoulder and a gauge protection block, and cutting teeth are arranged on the scraper. The rotating direction in the cutting process of the scrapers is defined as the forward direction, at least one of the scrapers on the drill bit body comprises front row shearing teeth and rear row teeth, the front row shearing teeth comprise one or more of circular sheet shearing teeth, circular slope shearing teeth and frustum slope shearing teeth, and the rear row teeth are rear row shearing teeth or rear row limiting teeth; and the rear row shearing teeth are one or more of circular sheet shearing teeth, and the rear row limiting teeth are one or more of spherical teeth, flat teeth and conical teeth. By designing mixed cooperation of the various cutting teeth and drill bit cutting tooth structures for drill bit cutting depth control, the torque fluctuation of the drill bit can be reduced, the grinding resistance and impact resistance of the drill bit are improved, the service life of the drill bit cutting teeth is prolonged, and the cutting capacity, the adaptive capacity and the mechanical rotation speed of the drill bit are improved.
Description
Technical field
The present invention relates to a kind of diamond bit, particularly relate to a kind of be applied to shale gas drilling well can mud,
The diamond bit that shale formation creeps into.
Background technology
In the shale gas resource of attention in recent years as in the exploitation of unconventional petroleum resources, rig is usually
Creeping at mud shale stratum, most drillng operations can run into bad ground, and in this case, drill bit becomes energy
The no key factor successfully crept into and affect drilling efficiency.The China of Application No. " 201410618305.9 " is specially
Profit application, it is proposed that at the PDC drill bit (abbreviation of polycrystalline diamond compact bit) of mud shale stratum drilling well,
This drill bit creeps at mud shale stratum, has certain practicality.But, in shale gas drilling well, often
Run into hard formation or hard interbedded layer, sometimes further encounter containing siliceous relatively high abrasive stratum, conventional directional well
PDC drill bit, mainly realizes boring by the shearing motion mode of PDC tooth (composite polycrystal-diamond)
Enter, at nose and the shoulder of drill bit, due to PDC tooth load characteristic distributions on bit profile, easy mistake
Early damage, cause the rate of penetration of PDC drill bit to become slowly；Sometimes a new PDC drill bit,
In hard interbedded layer drilling well, may quickly there is nose ring mill, shoulder rounding and the situation of drill bit undergauge in drill bit；
These all make PDC drill bit exist in hard interbedded layer drilling well, and work is unstable, cutting tooth in drill bit local transships, brill
The problem of head torque ripple, causes drill bit premature failure, can increase drilling cost, reduce drilling efficiency.
Summary of the invention
The purpose of the present invention is that provides a kind of gold being applied to shale gas drilling well to solve the problems referred to above
Diamond bit.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of diamond bit being applied to shale gas drilling well, including bit body, is distributed on described bit body
A plurality of scraper, the profile of described scraper includes inner cone, nose, outer cone, shoulder and gauge block, described scraper
It is provided with cutting tooth；With described scraper cut time direction of rotation as front, scrape described on described bit body
In cutter, at least on a scraper, include toothrow after a kind of front-seat shearing tooth and one；Described front-seat shearing tooth
For one or more in disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth, described heel row
Tooth is heel row shearing tooth or heel row limiting tooth；Described heel row shearing tooth is disk shearing tooth, and described heel row is spacing
Tooth is one or more in bulb tooth, tack tooth and conical tooth.
Specifically, in all scrapers, at least scraper uses following structure:
In described scraper on described bit body, at least including a scraper, its front toothrow is cut by front-seat disk
Cutting forms, and toothrow includes heel row disk shearing tooth thereafter；This front row disk shearing tooth is distributed in this and scrapes break bar
Wide inner cone, nose, outer cone, shoulder and gauge block, is provided with between this front row disk shearing tooth and cutting face
0 °～the back rake angle of 35 °；This heel row disk shearing tooth is distributed in the nose of this blade profile, outer cone and shoulder,
It is provided with 15 °～the back rake angle of 30 ° between this heel row disk shearing tooth and cutting face；This front row disk shearing tooth
Proud exposure more than the proud exposure of this heel row disk shearing tooth, difference in height is between 0～2.5 millimeter.
Or, in the described scraper on described bit body, at least include a scraper, its scraper include
Front toothrow and rear toothrow, its front toothrow is made up of front-seat disk shearing tooth, and toothrow includes heel row limiting tooth thereafter；
This front row disk shearing tooth is distributed in the inner cone of this blade profile, nose, outer cone, shoulder and gauge block, should
It is provided with 0 °～the back rake angle of 35 ° between front-seat disk shearing tooth and cutting face；This heel row limiting tooth is bulb
One or more in tooth, tack tooth and conical tooth, this heel row limiting tooth be distributed in this blade profile inner cone,
Nose, outer cone and shoulder, be provided with the top rake of-8 °～+8 ° between this heel row limiting tooth and cutting face；Before this
The proud exposure of row's disk shearing tooth is more than the proud exposure of this heel row limiting tooth, and difference in height is at 0～2.5 millimeter
Between.
Or, in the described scraper on described bit body, at least include a scraper, its scraper include
Front toothrow and rear toothrow, its front toothrow is by front-seat circular sloped surface shearing tooth and/or front-seat frustum inclined-plane shearing tooth group
Becoming, toothrow includes heel row limiting tooth thereafter；This front toothrow is distributed in the inner cone of this blade profile, nose, outer
Cone and shoulder, be provided with 10 °～the back rake angle of 25 ° between this front toothrow and cutting face；This heel row limiting tooth is
One or more in bulb tooth, tack tooth and conical tooth, this heel row limiting tooth is distributed in this blade profile
Inner cone, nose, outer cone and shoulder, be provided with the top rake of-8 °～+8 ° between this heel row limiting tooth and cutting face；
The proud exposure of this front toothrow is more than the proud exposure of this heel row limiting tooth, and difference in height is between 0～2.5 millimeter.
As preferably, the circle of described circular sloped surface shearing tooth is cut sth. askew between bevel and tooth post circular planar lowermost
Angle angle is 5 °～25 °；The frustum of described frustum inclined-plane shearing tooth is cut sth. askew bevel and frustum circular planar lowermost
Between angle angle be 5 °～25 °；Folder between taper cutting face and the tooth post centrage of described conical tooth
Angle angle is 28 °～66 °.
As preferably, in all of described cutting tooth, conical tooth, bulb tooth and shearing tooth are glomerocryst Buddha's warrior attendant
Stone composite teeth or the composite teeth manufactured by polycrystalline superabrasive materials in the form.
In above-mentioned all structures, the title implication of each cutting tooth is as follows:
Front toothrow: in shale gas drilling well in recent years, the scraper of the conventional PDC drill bit of use usually uses
The cloth tooth mode of double rows of teeth, with scraper cut time direction of rotation as front, scraper front row arrange cutting
The most front toothrow of tooth；
Rear toothrow: corresponding with front toothrow, at the rear toothrow of cutting tooth that scraper heel row is arranged；
Shearing tooth: be provided with disk PDC tooth on the scraper of conventional PDC drill bit, cut stratum with cut mode,
And realize the rapid drilling of drill bit, the assembling in bit of this disk PDC tooth according to suitable back rake angle
Form, is referred to as shearing tooth with the cutting tooth on cut mode cutting stratum；
Limiting tooth: the effect of the rear toothrow the most restricted PDC drill bit cutting-in of conventional PDC drill bit, is not to shear
The assembling form of tooth and having limits the tooth post of PDC drill bit cutting-in function and is referred to as limiting tooth, and limiting tooth is the most vertical
Directly it is arranged on the blade profile of PDC drill bit.
Other title is according to literal understanding, such as: front-seat shearing tooth is the shearing tooth being located at front row, after
Row's shearing tooth is the shearing tooth being located at heel row.
The beneficial effects of the present invention is:
The bit cutting toothing that the present invention is controlled by the multiple cutting tooth 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 Cutter
Life-span, and improve the cutting power of drill bit, adaptation ability and rate of penetration, strengthen the stability of drill bit, for
User reduces drilling cost；It is embodied in:
1, use scraper type double rows of teeth cloth toothing, improve the subject range of drill bit；Before and after same scraper
Toothrow, improves the ability of drill bit design variation and selection, can be according to drilling stratum feature, and it is suitable to select
Structure.
2, use scraper type double rows of teeth cloth toothing, preferably suitably proud exposure, cut for every turn that controls drill bit
Deeply, the stability of drill bit can be improved, be conducive to reducing torque ripple and the control of tool-face.
3, use scraper type double rows of teeth cloth toothing, can according to directional well and the operating type of horizontal well drilling,
Use suitable blade profile structure；According to hardness and the abrasiveness feature on stratum, select difference cutting tooth class
The diverse location at blade profile applied by type；Drill bit can be improved according to the feature of different teeth and broken rock feature
Shock resistance, abrasive resistant ability, improve the rate of penetration of drill bit and bit life, reach to lower user's drilling well
The purpose of cost.
Accompanying drawing explanation
Fig. 1 is the sectional plan view of the diamond bit being applied to shale gas drilling well of the present invention；
Fig. 2 is one of top view structural representation of diamond bit of shale gas drilling well of the present invention；
Fig. 3 is the two of the top view structural representation of the diamond bit of shale gas drilling well of the present invention；
Fig. 4 A is the three of the top view structural representation of the diamond bit of shale gas drilling well of the present invention；
Fig. 4 B is the four of the top view structural representation of the diamond bit of shale gas drilling well of the present invention；
Fig. 4 C is the five of the top view structural representation of the diamond bit of shale gas drilling well of the present invention；
Fig. 4 D is the six of the top view structural representation of the diamond bit of shale gas drilling well of the present invention；
Fig. 5 is the main TV structure schematic diagram of disk shearing tooth of the present invention；
Fig. 6 is the plan structure schematic diagram of disk shearing tooth of the present invention；
Fig. 7 is the main TV structure schematic diagram of circular sloped surface shearing tooth of the present invention；
Fig. 8 is the plan structure schematic diagram of circular sloped surface shearing tooth of the present invention；
Fig. 9 is the main TV structure schematic diagram of frustum inclined-plane of the present invention shearing tooth；
Figure 10 is the plan structure schematic diagram of frustum inclined-plane of the present invention shearing tooth；
Figure 11 is the disk shearing tooth of the present invention back rake angle change schematic diagram on scraper；
Figure 12 is the main TV structure schematic diagram of the tack tooth in limiting tooth of the present invention；
Figure 13 is the plan structure schematic diagram of the tack tooth in limiting tooth of the present invention；
Figure 14 is the main TV structure schematic diagram of the bulb tooth in limiting tooth of the present invention；
Figure 15 is the plan structure schematic diagram of the bulb tooth in limiting tooth of the present invention；
Figure 16 is the main TV structure schematic diagram of the conical tooth in limiting tooth of the present invention；
Figure 17 is the plan structure schematic diagram of the conical tooth in limiting tooth of the present invention；
Figure 18 is the Change of anteversion schematic diagram on scraper of the conical tooth in limiting tooth of the present invention.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings:
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4 A, Fig. 4 B, Fig. 4 C and Fig. 4 D, application of the present invention
Diamond bit in shale gas drilling well includes bit body 10, and a plurality of scraper 11 is distributed on bit body 10,
The profile of scraper 11 includes inner cone 7, nose 6, outer cone 5, shoulder 4 and gauge block 3, and scraper 11 sets
There is cutting tooth 9；With scraper 11 cut time direction of rotation as front, in the scraper 11 on bit body 10,
At least include toothrow after a kind of front-seat shearing tooth and one on a scraper 11；Described front-seat shearing tooth is circle
One or more in sheet shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth, described rear toothrow is
Heel row shearing tooth or heel row limiting tooth；Described heel row shearing tooth is disk shearing tooth, and described heel row limiting tooth is
One or more in bulb tooth, tack tooth and conical tooth；The circle of described circular sloped surface shearing tooth here
The angle angle between bevel and tooth post circular planar lowermost of cutting sth. askew is 5 °～25 °；Described frustum inclined-plane shearing tooth
The frustum angle angle between bevel and frustum circular planar lowermost of cutting sth. askew be 5 °～25 °；Described conical tooth
Angle angle between taper cutting face and tooth post centrage is 28 °～66 °.
Fig. 1 also show the chip area 13 between two scrapers 11, the nozzle 8 on bit body 10,
Center water channel 2 and joint 1, joint 1 is machined with connection screw thread, and during drilling well, diamond bit passes through joint
Screw thread on 1 and DHA are connected as a single entity and carry out drillng operation；These structures are the normal of diamond bit
Rule structure.
Illustrating, said structure is population structure, and according to actual needs, front-seat cutting tooth and heel row cut tooth
Concrete flute profile has different change, is specifically described the structure of its different changes below.Illustrate: following respectively
Planting tooth is all the one in cutting tooth 9；In described below, same tooth may be have employed different numeral marks
Note, is due to the tooth in different purposes accompanying drawings the most one to one.
The first concrete structure disclosed by the invention:
As depicted in figs. 1 and 2, in the scraper 11 on bit body 10, at least include a scraper 11, its
Front toothrow is made up of front-seat disk shearing tooth 15, and toothrow includes heel row disk shearing tooth 14 thereafter；This front row circle
Sheet 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 0 °～the back rake angle of 35 ° between this front row disk shearing tooth 15 and scraper cutting face；After this
Row's disk shearing tooth 14 is distributed in the nose 6 of profile, outer cone 5 and the shoulder 4 of this scraper 11, this heel row circle
15 °～the back rake angle of 30 ° it is provided with between sheet shearing tooth 14 and cutting face；This front row disk shearing tooth 15
Proud exposure is more than the proud exposure of this heel row 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.Its
After it, toothrow 12 is distributed in the inner cone 7 of profile, nose 6 and the shoulder 4 of scraper 11；Toothrow 12 after other
And it is provided with the top rake of-8 °～+8 ° between cutting face.The proud exposure of front-seat disk shearing tooth 15 is more than it
The proud exposure of toothrow 12 after it, difference in height is between 0～2.5 millimeter.
The second concrete structure disclosed by the invention:
As shown in figures 1 and 3, in the scraper 11 on bit body 10, at least include a scraper 11, its
Front toothrow is made up of front-seat disk shearing tooth 15, and toothrow includes heel row limiting tooth thereafter, and this heel row limiting tooth is
Bulb tooth 18；This front row disk shearing tooth 15 is distributed in the inner cone 7 of profile of this scraper 11, nose 6, outer
Cone 5, shoulder 4 and gauge block 3, be provided with 0 °～35 ° between this front row disk shearing tooth 15 and cutting face
Back rake angle；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, it is provided with the top rake of-8 °～+8 ° between this bulb tooth 18 and cutting face；This front row disk shearing tooth 15
Proud exposure more than the proud exposure of this bulb tooth 18, 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.Its
After it, toothrow 12 is distributed in the inner cone 7 of profile, nose 6 and the shoulder 4 of scraper 11；Toothrow 12 after other
And it is provided with the top rake of-8 °～+8 ° between cutting face.The proud exposure of front-seat disk shearing tooth 15 is more than it
The proud exposure of toothrow 12 after it, difference in height is between 0～2.5 millimeter.
The third concrete structure disclosed by the invention:
As shown in Fig. 1 and Fig. 4 A, in the scraper 11 on bit body 10, at least include a scraper 11, its
Scraper 11 at least includes multiple front-seat disk shearing tooths 15 and multiple heel row conical tooth 44；This front row disk is cut
Cutting 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,
It is provided with 0 °～the back rake angle of 35 ° between this front row disk shearing tooth 15 and cutting face；This conical tooth 44 is distributed
In the inner cone 7 of profile, nose 6, outer cone 5 and the shoulder 4 of this scraper 11, this conical tooth 44 and cutting face
Between be provided with the top rake of-8 °～+8 °；The proud exposure of this front row disk shearing tooth 15 is more than this conical tooth
The proud exposure of 44, difference in height is between 0～2.5 millimeter.
4th kind of concrete structure disclosed by the invention:
In conjunction with Fig. 1 and Fig. 4 B, in the scraper 11 on bit body 10, at least including a scraper 11, it is scraped
Cutter 11 at least includes multiple front-seat frustum inclined-planes shearing tooth 45 and multiple heel row conical tooth 44；This front row 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, should
It is provided with 10 °～the back rake angle of 25 ° between front-seat frustum inclined-plane shearing tooth 45 and cutting face；This heel row conical tooth
44 are distributed in the inner cone 7 of bit 11 profile, nose 6, outer cone 5 and shoulder 4, this conical tooth 44 with
The top rake of-8 °～+8 ° it is provided with between cutting face；The proud exposure of this frustum inclined-plane, front row shearing tooth 45 is big
In the proud exposure of this heel row conical tooth 44, difference in height is between 0～2.5 millimeter.
5th kind of concrete structure disclosed by the invention:
In conjunction with Fig. 1 and Fig. 4 C, in the scraper 11 on bit body 10, at least including a scraper 11, it is scraped
Cutter 11 at least includes multiple front-seat circular sloped surface shearing tooths 48 and multiple heel row conical tooth 44；This front row is circular
Inclined-plane 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, should
10 °～the back rake angle of 25 ° it is provided with between circular sloped surface shearing tooth 48 and cutting face；This heel row conical tooth 44
It is distributed in the inner cone 7 of the profile of this scraper 11, nose 6, outer cone 5 and shoulder 4, this heel row conical tooth 44
And it is provided with the top rake of-8 °～+8 ° between cutting face；The proud exposure of this front row circular sloped surface shearing tooth 48
More than the proud exposure of this heel row conical tooth 44, difference in height is between 0～2.5 millimeter.
6th kind of concrete structure disclosed by the invention:
In conjunction with Fig. 1 and Fig. 4 D, in the scraper 11 on bit body 10, at least including a scraper 11, it is scraped
Cutter 11 at least includes multiple front-seat frustum inclined-planes shearing tooth 45 and multiple heel row hemi-spherical ended shape insert 58；This front row 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, should
10 °～the back rake angle of 25 ° it is provided with between front toothrow and cutting face；This heel row hemi-spherical ended shape insert 58 is distributed in drill bit and scrapes
The inner cone 7 of cutter 11 profile, nose 6, outer cone 5 and shoulder 4, between this heel row hemi-spherical ended shape insert 58 and cutting face
It is provided with the top rake of-8 °～+8 °；The proud exposure of this front frustum inclined-plane shearing tooth 45 is spherical more than this heel row
The proud exposure of tooth 58, difference in height is between 0～2.5 millimeter.
In above-mentioned six kinds of concrete structures, on bit body 10 in all of cutting tooth 9, select conical tooth, bulb
Tooth and all shearing tooths (including disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth) are the most excellent
Elect polycrystal diamond composite teeth or the composite teeth manufactured by polycrystalline superabrasive materials in the form as.
Cutting tooth accompanying drawing is in above-mentioned six kinds of concrete structures below, uses to obtain more multiple tooth structure, below in conjunction with legend
It is specifically described:
As shown in Figure 5 and Figure 6, a kind of disk shearing tooth A, including polycrystalline diamond composite material and/or many
Disc diamond layer 61, curved surface faying face 65 and the multiple grain tungsten carbide tool composite wood that brilliant superabrasive materials in the form is constituted
The matrix 68 that material is formed, is formed in high temperature and high pressure environment.Between disk shearing tooth A and the cutting face of scraper
Having the angle of a forward and backward inclination, commonly referred to as back rake angle, this back rake angle is arranged between 0 °～35 °
Scope.
As shown in Figure 7 and Figure 8, a kind of circular sloped surface shearing tooth B, cuts shearing tooth for special construction.Should
Tooth has disc inclined-plane diamond layer 71, disc inclined-plane diamond layer 71 by polycrystalline diamond composite material and
/ or polycrystalline superabrasive materials in the form composition, there is shock resistance, abrasive resistant and heat-staple performance；This tooth also includes non-
The base that the binder course 76 of the faying face 74 of plane, composite formation and multiple grain tungsten carbide tool composite are formed
Body 79.This tooth is formed in high temperature and high pressure environment.The inclined-plane diamond layer 71 of circular sloped surface shearing tooth B and knot
There are one 5 °～+25 ° of angles in the baseplane 72 closing layer 76, is arranged on drill bit wing and is equivalent to angle of heel；
During drilling well, between circular sloped surface shearing tooth B and the cutting face of scraper, there is an angle of a forward and backward inclination, one
As be referred to as back rake angle, 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.Should
Tooth includes that frustum baseplane 83 constitutes diamond layer cutting face, frustum inclined-plane shearing tooth C together with tapered plane 81
Diamond layer cutting face 83 and 81, 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；Curved surface faying face 85 and multiple grain tungsten carbide tool composite
The matrix 88 formed forms this tooth together in high temperature and high pressure environment.Frustum inclined-plane shearing tooth C tapered plane 81
The angular range (or 25 °～+75 ° of scopes) of one 5 °～+25 ° is had at drill bit with frustum baseplane 83
Angle of heel during drill bit drilling well is equivalent on scraper；The cutting face of frustum inclined-plane shearing tooth C and bit it
Between have forward and backward slanted angle, commonly referred to as a back rake angle, this back rake angle is arranged between 10 °～25 °
Scope.
Figure 11 is disk shearing tooth A back rake angle change schematic diagram on scraper 11, this back rake angle in Fig. 5
Change includes: plus caster angle, minus caster and 0 degree of back rake angle, after D, the E in Figure 11 just represents respectively
Inclination angle, the angle of minus caster.Disk shearing tooth A back rake angle change of 11 on scraper is equally applicable to circle
Back rake angle on scraper 11 change of shape inclined-plane shearing tooth B and frustum inclined-plane shearing tooth C.
As shown in Figure 12 and Figure 13, a kind of tack tooth F is multiple including cylindrical plane 91 and multiple grain tungsten carbide tool
The matrix 97 that condensation material is formed.Have between axis and the cutting face of bit of tack tooth F one forward and backward
Slanted angle, commonly referred to as top rake, this top rake is between-8 °～+8 °.
As shown in FIG. 14 and 15, a kind of bulb tooth G, for special diamond tooth, constitute including sphere 101
Spherical diamond layer, this diamond layer is by polycrystalline diamond composite material and/or polycrystalline superabrasive materials in the form structure
Become, there is shock resistance, abrasive resistant and heat-staple performance；With on-plane surface faying face 105 and multiple grain carbonization
The matrix 107 that composite tungsten material is formed forms this tooth together in high temperature and high pressure environment.Bulb tooth G can also
Choose the tooth post of generally tungsten carbide material；One is had between axis and the cutting face of bit of bulb tooth G
Individual forward and backward slanted angle, commonly referred to as top rake, this top rake is between-8 °～+8 °.
As shown in Figure 16 and Figure 17, a kind of conical tooth H, for special diamond tooth；Including taper surface 111
The conical surface diamond layer constituted, this conical surface diamond layer is ground by polycrystalline diamond composite material and/or polycrystalline are super
Material is constituted, and has shock resistance, abrasive resistant and heat-staple performance；With on-plane surface faying face 115 and polycrystalline
The matrix 118 that grain tungsten carbide tool composite is formed forms this tooth together in high temperature and high pressure environment.Taper surface 111
An angle 113, angle scope between 28 °～+66 ° is had with the axis of conical tooth H.Conical tooth H
Axis and the cutting face of bit between have forward and backward slanted angle, commonly referred to as a top rake, should
Top rake is between-8 °～+8 °.
Figure 18 is conical tooth H axis Change of anteversion schematic diagram on scraper 11, this top rake in Figure 16
Change includes: negative top rake, positive top rake and 0 degree of top rake, and J, the K in Figure 18 represents before bearing respectively
Inclination angle, the angle of positive top rake.Conical tooth H axis Change of anteversion of 11 on scraper is equally applicable to put down
Head tooth F and bulb tooth G Change of anteversion on scraper 11.
Illustrate: in this drill bit in conical tooth and various shearing tooth, there is polycrystalline superabrasive materials in the form；Polycrystalline is super to be ground
Mill material includes diamond and natural diamond particles, diamond and natural diamond monocrystalline and micro-
The mixing of grain, containing polycrystalline superabrasive materials in the form such as cubic boron nitrides；In instances, polycrystalline superabrasive materials in the form and
The catalyst material that hard alloy substrate uses in the technical process of high temp/high pressure (" HTHP "), it is possible to shape
Become the conical tooth of desired polycrystalline superabrasive materials in the form and the disk shearing tooth of polycrystalline superabrasive materials in the form.
In the technical process of the high temp/high pressure (" HTHP ") of above-mentioned formation polycrystalline superabrasive materials in the form, can add
The forcing press of the high temp/high pressure of heat completes.General high temperature reaches under the temperature conditions of 1420 DEG C, and high pressure about exists
Under the conditions of high pressure between 5.5GPa～7.8GPa；Although the accurate behaviour of high temp/high pressure (HTHP) technique
Make parameter the concrete composition according to the various materials being currently in use and quantity to be changed.At high temp/high pressure
Forcing press in pressure can set the most constant high temp/high pressure (" HTHP ") under the conditions of, maintain
About within the time of 50 seconds～21 minutes, it is possible to form the conical tooth of polycrystalline superabrasive materials in the form and polycrystalline is super grinds
The disk shearing tooth of mill material.
Above-described embodiment is presently preferred embodiments of the present invention, is not the restriction to technical solution of the present invention,
As long as the technical scheme that can realize on the basis of above-described embodiment without creative work, all should regard
In the range of falling into the rights protection of patent of the present invention.
Claims (8)
1. it is applied to a diamond bit for shale gas drilling well, including bit body, described bit body is distributed
Have a plurality of scraper, the profile of described scraper to include inner cone, nose, outer cone, shoulder and gauge block, described in scrape
Cutter is provided with cutting tooth；It is characterized in that: with described scraper cut time direction of rotation as front, described brill
In described scraper on head body, at least on a scraper, include toothrow after a kind of front-seat shearing tooth and one；
Described front-seat shearing tooth be the one in disk shearing tooth, circular sloped surface shearing tooth and frustum inclined-plane shearing tooth or
Several, described rear toothrow is heel row shearing tooth or heel row limiting tooth；Described heel row shearing tooth is disk shearing tooth,
Described heel row limiting tooth is one or more in bulb tooth, tack tooth and conical tooth.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
In described scraper on described bit body, at least including a scraper, its front toothrow is by front-seat disk shearing tooth
Composition, toothrow includes heel row disk shearing tooth thereafter；This front row disk shearing tooth is distributed in this blade profile
Inner cone, nose, outer cone, shoulder and gauge block, be provided with between this front row disk shearing tooth and cutting face 0 °～
The back rake angle of 35 °；This heel row disk shearing tooth is distributed in the nose of this blade profile, outer cone and shoulder, should
15 °～the back rake angle of 30 ° it is provided with between heel row disk shearing tooth and cutting face；This front row disk shearing tooth
Proud exposure is more than the proud exposure of this heel row disk shearing tooth, and difference in height is between 0～2.5 millimeter.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
In described scraper on described bit body, at least including a scraper, its front toothrow is by front-seat disk shearing tooth
Composition, toothrow includes heel row limiting tooth thereafter；This front row disk shearing tooth be distributed in this blade profile inner cone,
Nose, outer cone, shoulder and gauge block, be provided with 0 °～35 ° between this front row disk shearing tooth and cutting face
Back rake angle；This heel row limiting tooth is one or more in bulb tooth, tack tooth and conical tooth, and this heel row limits
Position tooth is distributed in the inner cone of this blade profile, nose, outer cone and shoulder, this heel row limiting tooth and cutting face it
Between be provided with the top rake of-8 °～+8 °；The proud exposure of this front row disk shearing tooth is more than this heel row limiting tooth
Proud exposure, difference in height is between 0～2.5 millimeter.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
In described scraper on described bit body, at least including a scraper, its front toothrow is cut by front-seat circular sloped surface
Cutting and/or front-seat frustum inclined-plane shearing tooth composition, toothrow includes heel row limiting tooth thereafter；This front toothrow is distributed
In inner cone, nose, outer cone and the shoulder of this blade profile, be provided with between this front toothrow and cutting face 10 °～
The back rake angle of 25 °；The top rake of-8 °～+8 ° it is provided with between this heel row limiting tooth and cutting face；This heel row limits
Position tooth is one or more in bulb tooth, tack tooth and conical tooth, and this heel row limiting tooth is distributed in this scraper
The inner cone of profile, nose, outer cone and shoulder, be provided with-8 °～+8 ° between this heel row limiting tooth and cutting face
Top rake；The proud exposure of this front toothrow is more than the proud exposure of this heel row limiting tooth, and difference in height is 0～2.5
Between Hao meter.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
The angle angle that the circle of described circular sloped surface shearing tooth is cut sth. askew between bevel and tooth post circular planar lowermost is
5 °～25 °.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
The angle angle that the frustum of described frustum inclined-plane shearing tooth is cut sth. askew between bevel and frustum circular planar lowermost is
5 °～25 °.
The diamond bit being applied to shale gas drilling well the most according to claim 1, it is characterised in that:
Angle angle between taper cutting face and the tooth post centrage of described conical tooth is 28 °～66 °.
8. according to the diamond bit being applied to shale gas drilling well in any of the one of claim 1-7,
It is characterized in that: in all of described cutting tooth, conical tooth, bulb tooth and shearing tooth are polycrystalline diamond
Composite teeth or the composite teeth manufactured by polycrystalline superabrasive materials in the form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338714.8A CN106320990A (en) | 2015-06-18 | 2015-06-18 | Diamond drill bit applied to shale gas well drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510338714.8A CN106320990A (en) | 2015-06-18 | 2015-06-18 | Diamond drill bit applied to shale gas well drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106320990A true CN106320990A (en) | 2017-01-11 |
Family
ID=57732930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510338714.8A Pending CN106320990A (en) | 2015-06-18 | 2015-06-18 | Diamond drill bit applied to shale gas well drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106320990A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| US5244039A (en) * | 1991-10-31 | 1993-09-14 | Camco Drilling Group Ltd. | Rotary drill bits |
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| EP2497895A1 (en) * | 2009-04-22 | 2012-09-12 | Baker Hughes Incorporated | Methods of off-center drilling |
| CN201874472U (en) * | 2010-11-26 | 2011-06-22 | 周东 | PDC (Polycrystalline Diamond Compact) bit with double rows of teeth |
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| 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 |
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Application publication date: 20170111 |