CN104963632B - A kind of fixed cutter drill bits for being capable of pre- anticreep tooth - Google Patents
A kind of fixed cutter drill bits for being capable of pre- anticreep tooth Download PDFInfo
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- CN104963632B CN104963632B CN201510419580.2A CN201510419580A CN104963632B CN 104963632 B CN104963632 B CN 104963632B CN 201510419580 A CN201510419580 A CN 201510419580A CN 104963632 B CN104963632 B CN 104963632B
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- socket
- cutting tooth
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Abstract
The invention discloses a kind of fixed cutter drill bits for being capable of pre- anticreep tooth, belong to probing bit technique field.The drill bit includes bit body and cutting tooth, the bottom surface of the cutting tooth is provided with the cylinder boss being integrally formed with cutting tooth, the bottom surface of socket on the bit body is additionally provided with blind round hole, cut toothing to be adapted with socket structure, the groove being parallel to each other with socket axis is further evenly arranged with the face of cylinder of the socket.The drill bit of the present invention is identical with the surface structure of existing bit technique, but by the structural relation of optimization, improvement cutting tooth and socket, enhances the permanent tooth intensity of cutting tooth, and also protects silver brazing by excessive erosion, effectively cutting tooth can be prevented to come off.
Description
Technical field
Set the invention belongs to the probing such as petroleum gas, mine engineering, building foundation engineering construction, geology, hydrology
Standby rock crushing tool field.
Background technology
Drill bit be in drilling engineering to fractured rock, form the rock crushing tool of pit shaft.Existing drill bit is broadly divided into non-solid
Determine cutter drill bits and fixed cutter drill bits.So-called on-fixed cutter drill bits, refer in the operating condition, tooth or cut
Cut the drill bit that there is relative motion between tooth and bit body.If the cutting tooth on drill bit is integrated with bit body consolidation all the time,
Each other without relative motion, then this kind of drill bit is called fixed cutter drill bits.
Fixed cutter drill bits mainly have drag bit, PDC（Composite polycrystal-diamond）Drill bit, impregnated diamond drill machine
Head, its Typical Representative is PDC（Composite polycrystal-diamond）Drill bit.PDC drill bits are drilling engineerings（Particularly oil is natural
Gas drilling engineering）One of middle main bit kind used.When PDC drill bit works, drill bit rotary drilling in the presence of the pressure of the drill
Enter, by the PDC composite sheets on drill bit are to the cutting of formation rock or scrape and cut effect fractured rock, so that in formation rock
It is middle to be formed and gradually extend pit shaft.
In PDC drill bit of the prior art, PDC composite sheets are to be fixedly arranged at by way of silver brazing on bit body.Typically
In the case of, the shape of used composite sheet is cylinder, the face of cylinder of the cylinder there are about one-third of the area exposure in
Bit body surface, in addition 2/3rds area contacted with bit body.PDC composite sheets are when cutting bottom rock, bottom rock
There is larger impulsive force to composite sheet, if the weld strength of silver brazing is insufficiently resistant to impact of the bottom rock to composite sheet,
Composite sheet will be made to be come off from bit body, referred to as take off tooth or flake phenomenon.As long as some composite sheet on drill bit occurs
Come off, then the bottom rock impulsive force suffered by the composite sheet adjacent with the composite sheet can be sharply increased, aggravate the mill of drill bit
Damage or occur more de- tooth phenomenon, cause the actual effect of drill bit.
The principal element of influence composite sheet weld strength has：1. the exposure of PDC composite sheets is in the height on bit body surface.It is multiple
Height of the conjunction piece exposure in bit body surface is lower, and the area that composite sheet is contacted with bit body is bigger, then weld strength is got over
Height, but because the proud exposure of composite sheet is low, the depth that composite sheet is pressed into rock is lower, then and drill bit rate of penetration is got over
It is low.Therefore 1/3rd outer surfaces meeting exposure of composite sheet is external in drill bit under normal circumstances.2. the waterpower punching of pair silver solder
Erosion.In drilling process, drilling fluid has stronger erosion operation, therefore the material or the material on bit body surface of bit body to bit body
Material is based on the wear-resistant tungsten carbide of Anti-erosion.But it is the silver solder that welding is used, silver solder between composite sheet and bit body
Erosion resistance it is weaker, if working time of the drill bit in shaft bottom is longer, then silver solder can be gradually by erosion, by serious shadow
Ring the weld strength to composite sheet.3. silver solder skewness.The diameter ratio of general composite sheet is corresponding with corresponding composite sheet
Socket the big 0.4mm of diameter, during soldering composite sheet, by the space in 0.4mm gaps be full of silver solder.Due to welding composite sheet
When the fine impurities that exist and composite sheet and socket between gap the locus of composite sheet is not fixed, cause silver brazing
Expect skewness, it will the soldering strength of influence composite sheet.
The content of the invention
It is an object of the invention to：A kind of fixed cutter drill bits for being capable of pre- anticreep tooth are provided, by strengthening silver brazing
Weld strength, while silver brazing can be prevented by undue erosion, reach the risk of the de- tooth of reduction, increase drill bit making in shaft bottom
Use the time.
The object of the invention is realized by following technical proposals：
A kind of fixed cutter drill bits for being capable of pre- anticreep tooth, including bit body and cutting tooth, it is characterised in that：It is described to bore
The socket matched with the cutting tooth outline is provided with head body；The cutting edge theoretical contour of the cutting tooth is circle,
The axis of the cylinder boss being integrally formed with cutting tooth, the cylinder boss and cutting tooth is provided with the bottom surface of the cutting tooth
It is identical；Blind round hole is additionally provided with the bottom surface of the socket, the axis of the blind round hole is identical with the axis of socket；It is described
Cutting tooth is fixedly arranged in socket by way of silver brazing, and the cylinder boss is placed in blind round hole.
Above-mentioned cutting tooth is consolidated by way of silver brazing in corresponding socket, during welding cutting tooth, first by silver-colored pricker
Wlding is melted in socket and blind round hole, then cutting is inserted into socket, the part cylindrical insertion socket bottom surface of cutting tooth
In blind round hole.Because the axis of blind round hole and the axis of socket are identical, blind round hole is supported to cutting tooth formation, cutting tooth
Fixed, uniformly with the gap of socket, the wlding after fusing is evenly distributed in socket, cutting tooth is consolidated after cooling, be conducive to
Improve the weld strength of cutting tooth.The silver brazing material in blind round hole also strengthens the weld strength to cutting tooth simultaneously, and
And blind round hole is arranged on socket bottom surface, the silver brazing material that waterpower is difficult to its inside carries out erosion.
The length of the blind round hole is longer than the length for being fixedly arranged at its inner cylinder boss.The bottom surface of cutting tooth can be made tight
By the bottom surface of socket, socket forms effective support and protection to cutting tooth.
The groove being parallel to each other with socket axis is evenly arranged with the face of cylinder of the socket.Silver brazing after fusing
Material enters the groove, rotates socket inscribe and cuts tooth, the silver brazing material under molten state can be homogeneously brought to institute by cutting tooth
State in groove, and the periphery of socket can be made uniformly to cover silver brazing material.After cooling, cutting tooth is fixedly arranged in socket.
Because the groove in socket has filled uniformly with silver brazing material, the weld strength of cutting tooth and socket is added, and waterpower is rushed
Hit and be difficult to effectively carry out erosion to the silver brazing material in groove, it is to avoid the welding that cutting tooth is reduced because of hydraulic erosion is strong
Degree, can effectively prevent the risk that cutting tooth comes off.
On the other hand, when welding cutting tooth, some unavoidable impurity can enter in the silver brazing material after fusing, if without ditch
The design of groove, the larger impurity of particle influences whether positional precision of the cutting tooth in socket, eventually affects the use of drill bit
Effect.Using the groove of the design of the present invention, impurity can enter in groove, be unlikely to have influence on position of the cutting tooth in socket
Put precision.
It is preferred that, the cross section of the groove on the face of cylinder of the socket is rectangle.
It is preferred that, the cross section of the groove on the face of cylinder of the socket is semicircle.
It is preferred that, the material of the cutting tooth is PDC composite sheets, impregnated diamond, hard alloy or cube
Boron nitride.
Beneficial effects of the present invention：
1. by setting blind round hole in cutting tooth floor design cylinder boss, and in corresponding socket bottom surface, increase
Add silver brazing material and cutting tooth and the contact area of socket, increase weld strength, while also making silver brazing material be difficult to be rushed
Erosion, can play a part of prevention cutting tooth and come off.
2. the design feature of the cylinder boss of cutting tooth and the blind round hole of socket, it is to realize in socket to make cutting tooth
Precise positioning, and silver brazing material be distributed in socket it is more uniform.
3. by setting groove on the socket face of cylinder, the silver brazing material in the groove of socket can be effectively protected, can
The risk that effectively prevention cutting tooth comes off.
4. the present invention drill bit it is identical with the surface structure of existing bit technique, but by optimization, improve cutting tooth and
The structural relation of socket, enhances permanent tooth intensity, effectively cutting tooth can be prevented to come off.
Brief description of the drawings
The present invention is further described with embodiments of the present invention below in conjunction with the accompanying drawings.
Fig. 1 is the sectional view of the drill bit of the present invention.
Fig. 2 is the structural representation of the cutting tooth of the present invention.
Fig. 3 is the specific embodiment of the invention one.
Fig. 4 is the structural representation of bit body in the prior art.
Fig. 5 is the specific embodiment of the invention two.
The socket that Fig. 6 is the present invention has fluted structural representation one.
The socket that Fig. 7 is the present invention has fluted structural representation two.
Marked in figure：1- bit bodys, 2- cutting tooths, 21- cutting edges, 22- cylinder boss, 3- sockets, 301- blind round hole,
302- grooves.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
What Fig. 1 illustrated indicates a kind of basic structure for the fixed cutter drill bits for being capable of pre- anticreep tooth of the present invention, bag
Include including bit body 1 and cutting tooth 2, it is characterised in that：It is provided with and matches with the profile of cutting tooth 2 on the bit body 1
Socket 3.Cutting toothing as shown in Figure 2, the theoretical contour of cutting edge 21 of the cutting tooth 2 is circle, is cut described
The bottom surface for cutting tooth 2 is provided with the cylinder boss 22 being integrally formed with cutting tooth, the cylinder boss 22 and the axis phase of cutting tooth 2
Together.Socket structure as shown in Figure 3, blind round hole 301 is additionally provided with the bottom surface of the socket 3, the blind round hole 301
Axis is identical with the axis of socket 3；The cutting tooth 2 is fixedly arranged at by way of silver brazing in socket 3, the cylinder boss 22
It is placed in blind round hole 301.
Compared with the prior art shown in Fig. 4, drill bit of the invention adds circle on the basis of existing cutting tooth technology
Post boss 22, is provided with the blind round hole 301 for being longer than cylinder 22 on the basis of existing drill bit body technique in the bottom surface of socket 3.Cut
Cut tooth 2 and realize precise positioning in socket 3, the gap between the face of cylinder of cutting tooth 2 and the face of cylinder of socket is kept in balance,
Silver brazing material is evenly distributed in the gap, also use silver brazing between cylinder boss 22 and blind round hole 301 in addition
Material is consolidated, and the anti-dropout to cutting tooth 2 plays more positive effect.
Fig. 5 is another embodiment of the drill bit of the present invention.The bottom surface of socket 3 of bit body 1 is provided with circle
Blind hole 301, and the groove 302 being parallel to each other with socket axis is evenly arranged with the face of cylinder of socket 3 simultaneously.Groove is set
Meter makes silver brazing material add the contact area with socket, makes the consolidation of cutting tooth more firm, while also protecting silver brazing material
Avoid by undue erosion, play a part of prevention cutting tooth and come off.
As shown in fig. 6, as a kind of preferred embodiment, the cross section of the groove 302 on the face of cylinder of the socket 3 is square
Shape.
As shown in Fig. 7 institutes, as another preferred embodiment, the cross section of the groove 302 on the face of cylinder of the socket 3 is
It is semicircle.
It is preferred that, the material of the cutting tooth is PDC composite sheets, impregnated diamond, hard alloy or cube
Boron nitride.
Those of ordinary skill in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as in the spirit of the present invention, the change to embodiment described above
Change, modification will all fall in the range of claims of the present invention.
Claims (4)
1. a kind of fixed cutter drill bits for being capable of pre- anticreep tooth, including bit body（1）And cutting tooth（2）, it is characterised in that：Institute
State bit body（1）On be provided with and the cutting tooth（2）The socket that profile matches；The cutting tooth（2）Cutting edge（21）
Theoretical contour is circle, in the cutting tooth（2）Bottom surface be provided with and cutting tooth（2）The cylinder boss being integrally formed
（22）, the cylinder boss（22）With cutting tooth（2）Axis it is identical；In the socket（3）Bottom surface be additionally provided with it is circular blind
Hole（301）, the blind round hole（301）Axis and socket（3）Axis it is identical；The cutting tooth（2）Pass through silver brazing
Mode is fixedly arranged at socket（3）It is interior, the cylinder boss（22）It is placed in blind round hole（301）It is interior；The blind round hole（301）Length
Degree, which is longer than, is fixedly arranged at its inner cylinder boss（22）Length；In the socket（3）The face of cylinder on be evenly arranged with and socket
The groove that axis is parallel to each other（302）.
2. it is capable of the fixed cutter drill bits of pre- anticreep tooth as claimed in claim 1, it is characterised in that：The socket（3）'s
Groove on the face of cylinder（302）Cross section be rectangle.
3. it is capable of the fixed cutter drill bits of pre- anticreep tooth as claimed in claim 1, it is characterised in that：The socket（3）'s
Groove on the face of cylinder（302）Cross section for semicircle.
4. it is capable of the fixed cutter drill bits of pre- anticreep tooth as claimed in claim 1, it is characterised in that：The material of the cutting tooth
Expect for PDC composite sheets, impregnated diamond, hard alloy or cubic boron nitride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419580.2A CN104963632B (en) | 2015-07-17 | 2015-07-17 | A kind of fixed cutter drill bits for being capable of pre- anticreep tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419580.2A CN104963632B (en) | 2015-07-17 | 2015-07-17 | A kind of fixed cutter drill bits for being capable of pre- anticreep tooth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104963632A CN104963632A (en) | 2015-10-07 |
| CN104963632B true CN104963632B (en) | 2017-09-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510419580.2A Active CN104963632B (en) | 2015-07-17 | 2015-07-17 | A kind of fixed cutter drill bits for being capable of pre- anticreep tooth |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372434B (en) * | 2018-11-19 | 2024-04-30 | 三原石油钻头厂 | Single cone bit inlaid with floating composite teeth |
| CN109386237B (en) * | 2018-11-19 | 2024-04-30 | 三原石油钻头厂 | Multi-blade drill bit inlaid with floating composite teeth |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6408958B1 (en) * | 2000-10-23 | 2002-06-25 | Baker Hughes Incorporated | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped |
| US20130140094A1 (en) * | 2011-12-05 | 2013-06-06 | Smith International, Inc. | Rolling cutter using pin, ball or extrusion on the bit body as attachment methods |
| WO2013116679A1 (en) * | 2012-02-03 | 2013-08-08 | Baker Hughes Incorporated | Cutting element retention for high exposure cutting elements on earth-boring tools |
| US20140196959A1 (en) * | 2006-08-11 | 2014-07-17 | Schlumberger Technology Corporation | Downhole drill bit |
| CN104246110A (en) * | 2011-12-29 | 2014-12-24 | 史密斯国际有限公司 | Split sleeves for rolling cutters |
-
2015
- 2015-07-17 CN CN201510419580.2A patent/CN104963632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6408958B1 (en) * | 2000-10-23 | 2002-06-25 | Baker Hughes Incorporated | Superabrasive cutting assemblies including cutters of varying orientations and drill bits so equipped |
| US20140196959A1 (en) * | 2006-08-11 | 2014-07-17 | Schlumberger Technology Corporation | Downhole drill bit |
| US20130140094A1 (en) * | 2011-12-05 | 2013-06-06 | Smith International, Inc. | Rolling cutter using pin, ball or extrusion on the bit body as attachment methods |
| CN104246110A (en) * | 2011-12-29 | 2014-12-24 | 史密斯国际有限公司 | Split sleeves for rolling cutters |
| WO2013116679A1 (en) * | 2012-02-03 | 2013-08-08 | Baker Hughes Incorporated | Cutting element retention for high exposure cutting elements on earth-boring tools |
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| Publication number | Publication date |
|---|---|
| CN104963632A (en) | 2015-10-07 |
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