CN204827247U - Embedded footpath tooth is protected to diamond - Google Patents
Embedded footpath tooth is protected to diamond Download PDFInfo
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- CN204827247U CN204827247U CN201520558535.0U CN201520558535U CN204827247U CN 204827247 U CN204827247 U CN 204827247U CN 201520558535 U CN201520558535 U CN 201520558535U CN 204827247 U CN204827247 U CN 204827247U
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Abstract
The utility model discloses an embedded footpath tooth is protected to diamond is formed by diamond layer that is located the upper strata and the hard alloy layer complex that is located the lower floor, hard alloy layer sets up the cylinder that the recess was described to the disk for the upper portion center, the axis of recess and the coincidence of hard alloy layer's axis, and hard alloy layer's axial section forms character cut in bas -relief shape, the diamond layer is the disk form, and the lateral wall of diamond layer closely cooperates with the lateral wall of recess, and the embedded complex of diamond layer is in hard alloy layer's recess. The utility model discloses can become one with the inside wall bit body welding of protecting the footpath hole completely when the welding, and not have any gap, therefore the phenomenon that the cap was taken off in the delaminating can not appear at the drill bit during operation to solve steel body drill bit and protected technological problem such as footpath and centralizer guarantor footpath.
Description
Technical field
The utility model relates to drill bit and manufactures field, is specifically related to a kind of embedded diamond gauge teeth.
Background technology
Along with the continuous maturation of steel body bit technical development, the advantage of steel body bit is more and more outstanding.But the overall wear resistance of steel body bit is still be not as particularly outstanding as the gauge problem of matrix drill bits, particularly bit body, namely how can ensure that the external diameter of bit body does not reduce is steel body bit in use faced comparatively distinct issues.In order to improve the abrasion resistance of steel body bit, a kind of effective way installs gauge teeth on the sidewall of steel body bit, its specific practice is: first, the external diameter of each wing of steel body bit digs out at least one gauge hole, the degree of depth in this gauge hole higher than the thickness of hard alloy layer, and need be less than or equal to the integral thickness of diamond compact.Then, be embedded in a diamond compact in each gauge hole as gauge teeth, the upper surface of its diamond layer is slightly dashed forward in the upper end or equal with the upper end in gauge hole in gauge hole.Finally, between the lateral wall and the inside wall in gauge hole of diamond compact, fill solder weld, and diamond compact is fixed in gauge hole.
But what current gauge teeth adopted is traditional diamond compact, this diamond compact be layering without external diameter operator guards, its primarily of hard alloy layer and diamond layer composition.Hard alloy layer and diamond layer are disc-shaped, and both equal diameters, diamond layer is stacked and placed on above hard alloy layer, and its diamond compact formed is disc-shaped, and the lateral wall of diamond compact has obvious layering.Due to adamantine weldability performance extreme difference, when traditional batch is welded in gauge hole without the diamond compact of external diameter operator guards, cannot Welding be passed through between the lateral wall of its diamond layer part and the inside wall in gauge hole, and leave certain gap.And this seems minimum gap, in the process of drilling bit high-speed work, as easy as rolling off a logly there is the phenomenon that cap is taken off in the diamond layer delamination of diamond compact, and make gauge hydraulic performance decline, thus the sidewall of steel body bit is worn and torn, and asymmetric steel body bit can affect the stability of steel body bit greatly, cause steel body bit to swing and merit is transmitted in waste, and finally cause the borehole wall to come off and collapse the generation of well accident.See Fig. 1.
Utility model content
Technical problem to be solved in the utility model is to provide the diamond compact of traditional batch without external diameter operator guards as the potential safety hazard existing for gauge teeth, provides a kind of embedded diamond gauge teeth.
For solving the problem, the utility model is achieved through the following technical solutions:
A kind of embedded diamond gauge teeth, is composited with the hard alloy layer being positioned at lower floor by the diamond layer being positioned at upper strata; Described hard alloy layer is the cylinder that central upper portion offers disc-shaped groove, and the axis of groove overlaps with the axis of hard alloy layer, and the axial section of hard alloy layer forms concave shape; Described diamond layer is disc-shaped, and the lateral wall of diamond layer and the sidewall of groove closely cooperate, and diamond layer is embedded to be compounded in the groove of hard alloy layer.
In such scheme, the diameter of described groove upper shed is less than or equal to the diameter of groove bottom surface.
In such scheme, the bottom surface of described groove is upper prominent arc surface.
In such scheme, the upper surface of described diamond layer is arcuate surface, and the upper surface of the upper surface of diamond layer and hard alloy layer forms rounding off.
In such scheme, the bottom margin place of described groove is provided with protruding reinforcing rib.
In such scheme, the height of described reinforcing rib is less than the degree of depth of groove.
In such scheme, described reinforcing rib is spot distribution, strip distribution and/or annular distribution at the bottom margin of groove.
In such scheme, described reinforcing rib is the square fritter being symmetrically distributed in bottom margin.
In such scheme, the lateral wall of described hard alloy layer offers the air discharge duct of longitudinal extension, and this air discharge duct extends to the upper surface of hard alloy layer from the soffit of hard alloy layer.
In such scheme, described air discharge duct is straight line or helix.
Compared with prior art, gauge teeth designed by the utility model, its lateral wall is without obvious hierarchy, its whole outer rim is the carbide alloy of easily weldering, and the inside of alloy and middle diamond synthesize one at high temperature under high pressure, make like this gauge teeth when welding can completely and the inside wall in gauge hole and bit body be welded into integrally, and without any gap, thus there will not be when bit operation delamination to take off the phenomenon of cap, thus solve the technical barrier such as steel body bit gauge and centralizer gauge.
Accompanying drawing explanation
Fig. 1 is the installation side sectional view of traditional diamond compact.
Fig. 2 is the structure side sectional view of embedded diamond gauge teeth.
Fig. 3 is the installation side sectional view of the embedded diamond gauge teeth shown in Fig. 2.
Number in the figure: 1, diamond layer; 2, hard alloy layer; 3, steel body bit (locally); 4, cored solder; 5, reinforcing rib.
Detailed description of the invention
A kind of embedded diamond gauge teeth, as shown in Figure 2, is composited with the hard alloy layer 2 being positioned at lower floor by the diamond layer 1 being positioned at upper strata.Described hard alloy layer 2 offers the cylinder of disc-shaped groove for central upper portion, and the axis of groove overlaps with the axis of hard alloy layer 2, and the axial section of hard alloy layer 2 forms concave shape.Described diamond layer 1 is in disc-shaped, and the lateral wall of diamond layer 1 and the sidewall of groove closely cooperate, in the embedded groove being compounded in hard alloy layer 2 of diamond layer 1.
Described groove upper shed is identical with the shape of bottom surface, and it can be the circle of rule, also can be connect rotund polygon.And in order to effectively reduce stress, in the utility model preferred embodiment, described groove upper shed and bottom surface shape are the circle of rule.The diameter of described groove upper shed is less than or equal to the diameter of groove bottom surface.When both equal diameters, the sidewall of groove is vertical with axis, and groove is cylindrical, and diamond layer 1 is directly embedded in hard alloy layer 2.When the diameter of upper shed is less than the diameter of bottom surface, the sidewall of groove is more and more far away from top to bottom to the distance of axis, groove is lower little large truncated cone-shaped, be embedded in hard alloy layer 2, and the embedded mode of joggle can allow the combination of diamond layer 1 and hard alloy layer 2 more firm diamond layer 1 tenon joint type.The bottom surface of described groove can be plane, also can be upper prominent arc surface.When the soffit of groove is upper prominent arc surface face, the bonding surface of diamond layer 1 and hard alloy layer 2 is not only made to strengthen, and make the edge of the lower limb of diamond layer 1 and groove again form class joggle fixed form, thus effectively improve diamond layer 1 and hard alloy layer 2 in conjunction with fastness.
The bottom margin place of described groove is provided with protruding reinforcing rib 5, and the reinforcing rib 5 set up can strengthen the bonding surface of diamond layer 1 and hard alloy layer 2, both is combined more firm, effectively prevents diamond layer 1 from deviating from.The shape of reinforcing rib 5 and distribution mode can design as required, as adopted in spot distribution, strip distribution and/or annular distribution.In the utility model preferred embodiment, described reinforcing rib 5 is for being symmetrically distributed in the square fritter of bottom margin, the reinforcing rib 5 of multiple square fritter, for the reinforcing rib 5 of the strip of effective number and the reinforcing rib 5 of a ring-type, its bonding surface can be accomplished maximum, thus better can strengthen the fastness of diamond layer 1 and hard alloy layer 2.And in order to reduce the stress produced of reinforcing rib 5, the edges and corners of described reinforcing rib 5 are all treated to chamfering form or arc transition form.The height of the reinforcing rib 5 set up is slightly less than the degree of depth of groove, and in the utility model preferred embodiment, the distance between the top of the upper surface distance groove of reinforcing rib 5 is below 0.5cm.The material of selected reinforcing rib 5 need be different from diamond, and its material is the material between hard alloy layer 2 hardness and diamond layer 1 hardness, or as the utility model preferred embodiment, the material of reinforcing rib 5 is identical with the material of hard alloy layer 2.
The upper surface being embedded into the diamond layer 1 of hard alloy layer 2 can be plane or arcuate surface, when the upper surface of diamond layer 1 can be plane, the upper surface of diamond layer 1 is equal with the upper surface of hard alloy layer 2, and when the upper surface of diamond layer 1 is arcuate surface, the upper surface of diamond layer 1 and the upper surface of hard alloy layer 2 form rounding off.So-called rounding off refers to, the annular upper surface of the upper surface of hard alloy layer 2 and the top of concave shape, it can be horizontal plane, when the upper surface of such diamond layer 1 and its rounding off, make the upper surface of whole embedded diamond gauge teeth form steel helmet shape, thus effectively strengthen the cutting force of gauge teeth.The upper surface of certain hard alloy layer 2 also can be the camber line surface that radian is all identical with radian with the upper surface center of circle of diamond layer 1, when the upper surface of such diamond layer 1 and its rounding off, make the upper surface formation rule arc-shaped of whole embedded diamond gauge teeth.
In order to air be allowed effectively to discharge in the process embedded, the lateral wall of described hard alloy layer 2 offers the air discharge duct of longitudinal extension, the true form of this air discharge duct does not have strict requirement, as long as the upper surface extending to hard alloy layer 2 from the soffit of hard alloy layer 2 can be met, as being straight line or helix.
Because the whole outer surface of the embedded diamond gauge teeth of said structure is carbide alloy, and the pliability that carbide alloy has and solderability, it not only makes embedded diamond gauge teeth can easierly be embedded in the gauge hole of drill bit, and the inside wall in the whole lateral wall of embedded diamond gauge teeth and gauge hole can be welded together completely by cored solder 4, and without any gap, thus there will not be when bit operation delamination to take off the phenomenon of cap, thus solve the gauge of steel body bit 3 and this technical barrier of gauge of centralizer.See Fig. 3.
Claims (10)
1. embedded diamond gauge teeth, is composited by the diamond layer (1) being positioned at upper strata and the hard alloy layer (2) that is positioned at lower floor; It is characterized in that: described hard alloy layer (2) offers the cylinder of disc-shaped groove for central upper portion, the axis of groove overlaps with the axis of hard alloy layer (2), and the axial section of hard alloy layer (2) forms concave shape; Described diamond layer (1) is in disc-shaped, and the lateral wall of diamond layer (1) and the sidewall of groove closely cooperate, in the embedded groove being compounded in hard alloy layer (2) of diamond layer (1).
2. embedded diamond gauge teeth according to claim 1, is characterized in that: the diameter of described groove upper shed is less than or equal to the diameter of groove bottom surface.
3. embedded diamond gauge teeth according to claim 1 and 2, is characterized in that: the bottom surface of described groove is upper prominent arc surface.
4. embedded diamond gauge teeth according to claim 1, it is characterized in that: the upper surface of described diamond layer (1) is arcuate surface, and the upper surface of the upper surface of diamond layer (1) and hard alloy layer (2) forms rounding off.
5. embedded diamond gauge teeth according to claim 1, is characterized in that: the bottom margin place of described groove is provided with protruding reinforcing rib (5).
6. embedded diamond gauge teeth according to claim 5, is characterized in that: the height of described reinforcing rib (5) is less than the degree of depth of groove.
7. the embedded diamond gauge teeth according to claim 5 or 6, is characterized in that: described reinforcing rib (5) is spot distribution, strip distribution and/or annular distribution at the bottom margin of groove.
8. embedded diamond gauge teeth according to claim 7, is characterized in that: described reinforcing rib (5) is for being symmetrically distributed in the square fritter of bottom margin.
9. embedded diamond gauge teeth according to claim 1, it is characterized in that: the air discharge duct lateral wall of described hard alloy layer (2) offering longitudinal extension, and this air discharge duct extends to the upper surface of hard alloy layer (2) from the soffit of hard alloy layer (2).
10. embedded diamond gauge teeth according to claim 9, is characterized in that: described air discharge duct is straight line or helix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520558535.0U CN204827247U (en) | 2015-07-29 | 2015-07-29 | Embedded footpath tooth is protected to diamond |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520558535.0U CN204827247U (en) | 2015-07-29 | 2015-07-29 | Embedded footpath tooth is protected to diamond |
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| CN204827247U true CN204827247U (en) | 2015-12-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064925A (en) * | 2015-07-29 | 2015-11-18 | 桂林星钻超硬材料有限公司 | Embedded diamond gauge tooth |
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- 2015-07-29 CN CN201520558535.0U patent/CN204827247U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105064925A (en) * | 2015-07-29 | 2015-11-18 | 桂林星钻超硬材料有限公司 | Embedded diamond gauge tooth |
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