CN2677582Y - Convex wedge cutting teeth for roller bit - Google Patents
Convex wedge cutting teeth for roller bit Download PDFInfo
- Publication number
- CN2677582Y CN2677582Y CN 200320125536 CN200320125536U CN2677582Y CN 2677582 Y CN2677582 Y CN 2677582Y CN 200320125536 CN200320125536 CN 200320125536 CN 200320125536 U CN200320125536 U CN 200320125536U CN 2677582 Y CN2677582 Y CN 2677582Y
- Authority
- CN
- China
- Prior art keywords
- wedge surface
- cutting teeth
- convex wedge
- cutting
- sides
- 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
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
The utility model relates to convex wedge cutting teeth for roller bits used for petroleum and geological drilling, comprising a tooth pole and a corona. The utility model is characterized in that the corona is an elliptic cone table-shaped corona formed by that a circular base section is transited into an arc addendum with an elliptical base section through sectional variation; wedge surfaces are cut out on the cambered surfaces at the two sides of the minor axis of the elliptic cone table-shaped corona; at least one wedge surface is a convex wedge surface. The utility model has the advantages that the structure of the convex wedge surface enhances the intensity of the cutting teeth; in the process of the moving in the stratum of the cutting teeth, the moving-in angle changes with the change of the moving-in depth, and the contact between the cutting teeth and the rocks is a point to point contact, which enhances the contact stress of the cutting teeth while cutting the rocks and enhances the ability of the cutting teeth to crush the rocks; meanwhile, the included angle alpha of the two sides of the cutting teeth is smaller and the cutting edges are longer, which increases the scraping area and enhances the cutting efficiency; in addition, the super-hard abrasion-proof material is used for further enhancing the service life of the cutting teeth.
Description
Technical field
The utility model relates to a kind of convex wedge surface cutting teeth that is used for oil and geological drilling rock bit.
Background technology
In the prior art, the cutting teeth of insert on rock bit is the carbide cutting tooth, and the profile of tooth of cutting teeth has multiple structure, and profile of tooth commonly used has scoop chisel insert, chisel teeth, blunt conical-ended shape insert, hemi-spherical ended shape insert etc.At different formation rock character and the broken rock characteristics of drill bit, should use difform cutting teeth, to obtain higher efficiency of breaking rock.With regard to scoop chisel insert, its head is point, easy wedging stratum, but its intensity is lower, uses in hard formation, and cutting teeth is more frangible, disconnected.Blunt conical-ended shape insert and hemi-spherical ended shape insert are applicable to hard formation, but their scraping poor performance.The cutting teeth of above-mentioned these profiles of tooth all can not adapt to the broken rock characteristic of hard plastic formation drill bit preferably, thereby has hindered rock bit rate of penetration and further raising in application life in hard plastic formation.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that exists at above-mentioned prior art and provide a kind of intensity higher and be easy to the convex wedge surface cutting teeth that is used for rock bit on wedging stratum.
The utility model is to solve the problems of the technologies described above the technical scheme that is proposed to be: include tooth post 4 and crown 3, its difference is that described crown carries out the transition to the arc tooth top 1 that a basal cross section is an ellipse by the basal cross section of a circle by changes of section, form oval taper type crown, cut out wedge surface 2 on the cambered surface of the minor axis both sides of oval taper type crown, having a wedge surface at least is the convex wedge surface.
Press such scheme, the wedge surface that cuts out on the cambered surface of the minor axis both sides of oval taper type crown is the convex wedge surface; Perhaps, a side cuts out a convex wedge surface on the cambered surface of the minor axis both sides of oval taper type crown, and opposite side is flat wedge surface.Major axis two side bus of oval taper type crown and vertical line (tooth element cylinder) be α in an angle, and α is 0～30 °, and α is 0～15 ° usually.
The beneficial effects of the utility model are that convex wedge surface structure has strengthened the intensity of cutting teeth, cutting teeth is in the process of wedging stratum, the wedging angle changes with the variation of depth of tooth penetration, being point between cutting teeth and the rock contacts with putting, strengthen the contact stress of cutting teeth rock cutting, improved the ability of its fractured rock.Simultaneously, the both sides angle α of cutting teeth is less, and cutting edge is longer, has increased the scraping area, has improved stock-removing efficiency.Pass through rounding design on the face mutually in each of cutting teeth, the stress that can eliminate on the denticle is concentrated.In addition, adopt ultra-hard abrasive material, the application life that can further improve cutting teeth.
Description of drawings
Fig. 1 is the front view of an embodiment of the utility model.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the stereogram of Fig. 1.
Fig. 5 is the vertical view of second embodiment of the utility model.
Fig. 6 is the front view of second embodiment of the utility model.
Fig. 7 is the left view of Fig. 6.
Fig. 8 is the front view of the 3rd embodiment of the utility model.
Fig. 9 is the left view of Fig. 8.
The specific embodiment
Further specify embodiment of the present utility model below in conjunction with accompanying drawing.
First embodiment is shown in Fig. 1,2,3,4, it is a two-sided convex wedge surface cutting teeth, include a columniform tooth post 4, tooth post upper end is a crown 3, crown carries out the transition to an oval end face by the basal cross section of circle by changes of section, and this ellipse end face is the basal cross section of arc tooth top 1, forms an oval taper type crown thus, cut out the convex wedge surface on the minor axis cambered surface of these ellipse taper type crown both sides, the symmetrical and horizontal bus of the convex wedge surface of both sides parallels.Described convex wedge surface can be an arc surface or involute cambered surface.Convex wedge surface upper end links to each other with arc tooth top 1.
Second embodiment of the present utility model is shown in Fig. 5,6,7, the main difference part of it and first embodiment is to be horizontal bus on the convex wedge surface of oval taper type crown both sides and cutting teeth central plane β in an angle, β is 0～15 °, preferable angle is 5～10 °, and formed arc tooth top 1 is broadened by narrow along teeth directional.The remainder structure is identical with first embodiment.
The 3rd embodiment of the utility model is shown in Fig. 8,9, its main feature is to be that a side is the convex wedge surface on the cambered surface of the minor axis both sides of oval taper type crown, opposite side is flat wedge surface, constitutes the cutting teeth of a single face convex wedge surface, and other parts are identical with first example structure.
Cutting teeth of the present utility model can be made by Hardmetal materials or superhard wear alloy material.
Claims (6)
1, a kind of convex wedge surface cutting teeth that is used for rock bit, include tooth post (4) and crown (3), it is characterized in that described crown carries out the transition to the arc tooth top (1) that a basal cross section is an ellipse by the basal cross section of a circle by changes of section, form oval taper type crown, cut out wedge surface (2) on the cambered surface of the minor axis both sides of oval taper type crown, having a wedge surface at least is the convex wedge surface.
2,, it is characterized in that the wedge surface that cuts out is the convex wedge surface on the cambered surface of the minor axis both sides of oval taper type crown by the described convex wedge surface cutting teeth that is used for rock bit of claim 1.
3, by the described convex wedge surface cutting teeth that is used for rock bit of claim 1, it is characterized in that a side cuts out a convex wedge surface on the cambered surface of the minor axis both sides of oval taper type crown, opposite side is flat wedge surface.
4, by claim 2 or the 3 described convex wedge surface cutting teeths that are used for rock bit, it is characterized in that major axis two side bus of oval taper type crown and vertical line α in an angle, α is 0～30 °.
5, by claim 2 or the 3 described convex wedge surface cutting teeths that are used for rock bit, it is characterized in that horizontal bus on the convex wedge surface of oval taper type crown both sides and cutting teeth central plane β in an angle, β is 0～15 °.
6, by claim 2 or the 3 described convex wedge surface cutting teeths that are used for rock bit, it is characterized in that described convex wedge surface can be an arc surface or involute cambered surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320125536 CN2677582Y (en) | 2003-12-24 | 2003-12-24 | Convex wedge cutting teeth for roller bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320125536 CN2677582Y (en) | 2003-12-24 | 2003-12-24 | Convex wedge cutting teeth for roller bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2677582Y true CN2677582Y (en) | 2005-02-09 |
Family
ID=34581347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320125536 Expired - Lifetime CN2677582Y (en) | 2003-12-24 | 2003-12-24 | Convex wedge cutting teeth for roller bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2677582Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050147A (en) * | 2016-07-20 | 2016-10-26 | 西南石油大学 | Wide-top reinforced tooth |
| CN106545299A (en) * | 2015-09-18 | 2017-03-29 | 成都百施特金刚石钻头有限公司 | A kind of new combination tooth PDC drill bit |
| CN108291427A (en) * | 2015-11-19 | 2018-07-17 | 史密斯国际有限公司 | Fixation bite drill bit with on-plane surface cutting element and other downhole tools above |
-
2003
- 2003-12-24 CN CN 200320125536 patent/CN2677582Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545299A (en) * | 2015-09-18 | 2017-03-29 | 成都百施特金刚石钻头有限公司 | A kind of new combination tooth PDC drill bit |
| CN108291427A (en) * | 2015-11-19 | 2018-07-17 | 史密斯国际有限公司 | Fixation bite drill bit with on-plane surface cutting element and other downhole tools above |
| US10794118B2 (en) | 2015-11-19 | 2020-10-06 | Smith International, Inc. | Fixed cutter bits and other downhole tools having non-planar cutting elements thereon |
| CN108291427B (en) * | 2015-11-19 | 2021-01-05 | 史密斯国际有限公司 | Fixed cutter drill bits having non-planar cutting elements thereon and other downhole tools |
| CN106050147A (en) * | 2016-07-20 | 2016-10-26 | 西南石油大学 | Wide-top reinforced tooth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201024900Y (en) | Gear-coated diamond compound sheet | |
| CN201513124U (en) | Plowing type diamond compound plate drill tooth | |
| EP0584255A1 (en) | Rotary mining tools | |
| CN108487865A (en) | A kind of ansa shape cutting tooth | |
| CN203452651U (en) | Strong cone PDC (Polycrystalline Diamond Compact) vibration reduction acceleration drill bit | |
| CN2677582Y (en) | Convex wedge cutting teeth for roller bit | |
| CN2828298Y (en) | Convex addendum cutting tooth | |
| CN201314198Y (en) | Polycrystalline diamond composite sheet | |
| CN215718487U (en) | PDC drill bit of ridge non-plane wide-edge cutting teeth | |
| CN203248080U (en) | Combined drill | |
| CN2743526Y (en) | Top deviating wedge shaped teeth | |
| CN106121543B (en) | PDC single-cone bit based on modularization tooth arrangement | |
| CN209539271U (en) | A kind of ansa shape cutting tooth | |
| CN213063478U (en) | Novel sharp ridge-shaped cutting tooth | |
| CN2490305Y (en) | Tooth form for tri-cone rotary drill bit | |
| CN208310700U (en) | A kind of ansa shape cutting tooth | |
| CN210946953U (en) | Milling tooth with pre-crushing function | |
| CN210685868U (en) | Multi-surface structure diamond hard alloy composite sheet | |
| CN201835753U (en) | Polycrystalline diamond compact for rock-breaking tool for drilling | |
| CN2886054Y (en) | Tapered tip cone wedge shaped tooth for roller bit | |
| CN111764829A (en) | Polycrystalline diamond compact for plastic stratum | |
| CN202673157U (en) | Double-cone deflective wedge tooth | |
| CN203729884U (en) | Diamond-impregnated drill bit with arc teeth | |
| CN203452652U (en) | PDC (polycrystalline diamond compact) drilling bit | |
| CN203248083U (en) | Tooth-embedded roller bit |
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: 20131224 Granted publication date: 20050209 |