CN2688864Y - Jointing tooth for tri-cone rotary drilling bit - Google Patents
Jointing tooth for tri-cone rotary drilling bit Download PDFInfo
- Publication number
- CN2688864Y CN2688864Y CN 200420017825 CN200420017825U CN2688864Y CN 2688864 Y CN2688864 Y CN 2688864Y CN 200420017825 CN200420017825 CN 200420017825 CN 200420017825 U CN200420017825 U CN 200420017825U CN 2688864 Y CN2688864 Y CN 2688864Y
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- CN
- China
- Prior art keywords
- plane
- cone
- corona
- crown
- tooth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model relates to a jointing tooth for tri-cone rotary drilling bit used in the petroleum and geological drilling fields, comprising a denticle and a corona. The utility model is characterized in that the corona is formed by one inclined plane cut out on a tapered crown base; the tapered crown base is a conic crown base or a cone spherical shape crown base; one lateral notch can be opened on the central section of the inclined plane; the included angle alpha between the inclined plane and the bottom surface of the corona is from 20 DEG to 60 DEG. The utility model has the advantages that the corona part has high intensity and can not be easily crushed in operation; the useful screen area is big, and the cutting edges formed on the addendum and the tooth side, and the inclined plane of the corona can carry out the cutting and the scraping against the well casing in different positions of the operative cone, and thus, the function of active path protection is stronger, the effect of trimming path protection is better, and the wellbore and the well casing struck out are smoother; the cone backs of the tri-cone and the multi-roller bits can be effectively protected, the well drilling efficiency and quality of the roller bits can be enhanced, and the service performance of the roller bits can be further optimized.
Description
Technical field
The utility model relates to a kind of deburring tooth that is used for the rock bit in petroleum geology probing field.
Background technology
Rock bit, particularly tricone bit have been widely used in petroleum geology probing field.Be divided into common rock bit and special guarantor footpath rock bit for three gear wheels and polydonita wheel drill bit by the bit gauge protection feature.A special feature of protecting the footpath rock bit is exactly at gear wheel back cone and the intersection that effluxes the conical surface (efflux cutting teeth and lay face) the deburring tooth to be set; as shown in Figure 1; its role is to initiatively to cut the borehole wall, keep the well aperture constant, protect the back cone of gear wheel simultaneously.Existing conventional deburring tooth is a chisel teeth, protects the footpath effect though this wedge shape deburring tooth can play certain deburring, because of profile of tooth more sharp-pointed, intensity is lower, not only in use be prone to broken phenomenon, and its effective work area is less, guarantor footpath effect is strong not enough.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of guarantor footpath effective at the deficiency of above-mentioned prior art existence, intensity height, the deburring tooth that is used for rock bit that functional performance is more excellent.
The utility model is that the technical scheme that problem adopted of the above-mentioned proposition of solution is: include denticle 10 and crown 8, its difference is that described crown constitutes by cutting out an inclined-plane on the taper crown base.
Press such scheme, described taper crown base is conical crown base or conisphere shape crown base; Can offer a transverse concave groove 9 at the middle part on described inclined-plane; Angle α=20～60 of described inclined-plane and crown bottom surface °; Described inclined-plane can be the stairstepping inclined-plane, and goes up low height, and ramp 6 parallels with lower inclined plane.
The beneficial effects of the utility model are: 1, crown part intensity height, and use is difficult for broken; 2, effectively work plane is big, can cut and squeeze and scrape the borehole wall in the different azimuth of gear wheel running at tooth top and the formed cutting edge of flank and crown inclined-plane itself, and it is strong therefore initiatively to protect the footpath function, and deburring is protected directly effective, and the well borehole wall of getting is more smooth; 3, can effectively protect the gear wheel back cone of three gear wheels and polydonita wheel drill bit, improve the drilling efficiency and the quality of rock bit, the functional performance of rock bit is further optimized.
Description of drawings
Fig. 1 uses the schematic diagram of laying on rock bit for deburring tooth and other cutting teeth.
Fig. 2 is the enlarged drawing of gear wheel deburring toothed portion among Fig. 1.
Fig. 3 is the front perspective view of an embodiment of the utility model.
Fig. 4 is the lateral view of an embodiment of the utility model.
Fig. 5 is the elevation of an embodiment of the utility model.
Fig. 6 is the front perspective view of another embodiment of the utility model.
Fig. 7 is the lateral view of another embodiment of the utility model.
Fig. 8 is the elevation of another embodiment of the utility model.
Fig. 9 is bumped into partial sectional view behind the gear wheel for the utility model.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
First embodiment such as Fig. 1,2,3,4,5, shown in 9, described deburring tooth includes the denticle 10 of cylindrical shape, there is chamfering 11 the denticle lower end, the denticle upper end is a crown 8, crown cuts out an inclined-plane by conical crown base and constitutes, the inclined-plane extends the crown bottom by the crown top to the lower edge, the angle α of inclined-plane and crown bottom surface is 30～45 °, the inclined-plane can tilt 1～5 ° to the right, forms the high right low lateral incline in a left side, offers a transverse concave groove that runs through at the middle part on inclined-plane, the inclined-plane is divided into ramp 6 and lower inclined plane 7, the width of transverse concave groove is 0.3～2 millimeter, and the degree of depth is 0.3～1.5 millimeter, and each interface of transverse concave groove is by the arc surface transition; The angle of inclination beta of conical crown base is 10～30 ° in the present embodiment, and whole deburring tooth 4 is made by Hardmetal materials.Insert was taken turns the gear wheel back cone 5 of drill bit and is effluxed the conical surface 3 intersections in polydonita when the utility model used, tooth top is towards effluxing the conical surface, can be circumferentially uniform along intersection, and with the interlaced laying of the outer rows of teeth that effluxes the conical surface, polydonita wheel drill bit is made of 2～5 gear wheels 2 and bit leg 1.Have the conical surface on the gear wheel, efflux the conical surface 3 and back cone 5.
Second embodiment of the utility model is shown in Fig. 6,7,8, its feature is that crown 8 cuts out a stairstepping inclined-plane by conical crown base and constitutes, low high on the inclined-plane, ramp 6 is lower than 0.3～2 millimeter of lower inclined plane, ramp parallels with lower inclined plane 7, and the angle α of upper and lower inclined-plane and crown bottom surface is 30～45 °.Other parts are identical with a last embodiment.
Claims (8)
1, a kind of deburring tooth that is used for rock bit includes denticle and crown, it is characterized in that described crown constitutes by cutting out an inclined-plane on the taper crown base.
2, by the described deburring tooth of claim 1, it is characterized in that described taper crown base is conical crown base or conisphere shape crown base.
3, by claim 1 or 2 described deburring teeth, it is characterized in that offering a transverse concave groove at the middle part on described inclined-plane.
4,, it is characterized in that angle α=20～60 ° of described inclined-plane and crown bottom surface by claim 1 or 2 described deburring teeth.
5, by claim 1 or 2 described deburring teeth, it is characterized in that described inclined-plane is the stairstepping inclined-plane, and go up low height, ramp parallels with lower inclined plane.
6, by claim 1 or 2 described deburring teeth, it is characterized in that the inclined-plane tilts 1～5 ° to the right.
7, by the described deburring tooth of claim 3, the width that it is characterized in that transverse concave groove is 0.3～2 millimeter, and the degree of depth is 0.3～1.5 millimeter, and each interface of transverse concave groove is by the arc surface transition.
8, by the described deburring tooth of claim 5, it is characterized in that ramp is lower than 0.3～2 millimeter of lower inclined plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420017825 CN2688864Y (en) | 2004-04-21 | 2004-04-21 | Jointing tooth for tri-cone rotary drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420017825 CN2688864Y (en) | 2004-04-21 | 2004-04-21 | Jointing tooth for tri-cone rotary drilling bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2688864Y true CN2688864Y (en) | 2005-03-30 |
Family
ID=34669017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420017825 Expired - Lifetime CN2688864Y (en) | 2004-04-21 | 2004-04-21 | Jointing tooth for tri-cone rotary drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2688864Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089152A (en) * | 2013-02-28 | 2013-05-08 | 西南石油大学 | Embedded type wide-tooth cone bit |
-
2004
- 2004-04-21 CN CN 200420017825 patent/CN2688864Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089152A (en) * | 2013-02-28 | 2013-05-08 | 西南石油大学 | Embedded type wide-tooth cone bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140421 Granted publication date: 20050330 |