CN2490305Y - Tooth form for tri-cone rotary drill bit - Google Patents
Tooth form for tri-cone rotary drill bit Download PDFInfo
- Publication number
- CN2490305Y CN2490305Y CN 01206800 CN01206800U CN2490305Y CN 2490305 Y CN2490305 Y CN 2490305Y CN 01206800 CN01206800 CN 01206800 CN 01206800 U CN01206800 U CN 01206800U CN 2490305 Y CN2490305 Y CN 2490305Y
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- CN
- China
- Prior art keywords
- tooth
- rock
- sides
- scraping
- profile
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model is a tooth form for cone rotary drill bit used in drilling well on crust for petroleum, geology or other purposes, which consists of a tooth column, a scraping side face, an addendum cone and a scraping edge. The utility model is characterized in that 1-4 edges and 1-4 side faces are arranged besides the existing wedge tooth; the tooth advances or rotates with respective to the rock; the included angle A between two adjacent side faces is 50 degrees to 150 degrees, and the included angle B is equal to or not equal to twice of the A. The tooth form provided by the utility model can enhance side scraping capability of the tooth, increase scraping volume of rock and rock-breaking efficiency, and has wider application range of stratums.
Description
The utility model relates to oil, geological drilling is used or a kind of profile of tooth of other purpose boring rock bit on the earth's crust.
The shape of the existing tooth of rock bit has chisel teeth, hemi-spherical ended shape insert, conical tooth etc. at present.At different formation rock character and the broken rock characteristics of drill bit, often use difform tooth, to obtain higher efficiency of breaking rock.The broken rock characteristics of single-cone rotary drill bit are that long scraping apart from slippage cut fractured rock, and the tooth side direction is scraped the main broken rock form that broken rock is a single-cone rotary drill bit of squeezing.Though existing chisel teeth helps the wedging rock, but its side direction is scraped the rotation of crowded area along with drill bit, constantly changes, and can not scrape with maximum side direction all the time and squeeze face scraping rock; Though the side direction of hemi-spherical ended shape insert and conical tooth is scraped crowded area and do not changed with the rotation of drill bit, it is not high that the conical tooth side direction is scraped crowded efficiency of breaking rock; Hemi-spherical ended shape insert not only side direction scrapes that to squeeze efficiency of breaking rock not high, and is difficult to the wedging rock.These several profiles of tooth all can not be suitable for the movement characteristic of single-cone rotary drill bit preferably, have hindered the further raising of single-cone rotary drill bit efficiency of breaking rock.
The purpose of this utility model is in order to improve the efficient of single-cone rotary drill bit fractured rock, the tooth side direction to be scraped in the mode of similar milling squeeze the side rock, keeping bigger side direction to scrape crowded area, and a kind of profile of tooth that is used for rock bit is provided.
The purpose of this utility model is achieved in that on the basis of existing two sides of original chisel teeth, increases a side again; Or on the frustum part of original conical tooth, cut three planes or curved surface, more than so just being equivalent on the basis of former chisel teeth a rib and a face; Tooth top is a spirogyrate curved surface.For the rib wearing and tearing that do not make tooth are too fast, the rib between side and other side can not be too sharp-pointed; When tooth moved with gear wheel, tooth had forward and two kinds of motions of rotation with respect to rock; Three ribs on the tooth are scraped crowded rock successively, help tooth and scrape crowded rock, and the broken scar of expansion is long-pending and broken rock mass is long-pending.The rib number of tooth and number of sides can increase according to the character on stratum, and rib number and number of sides are minimum to be three.When being used for soft formation, the rib number of tooth and number of sides are three; When being used for hard or hard formation, the rib number of tooth and number of sides can increase to four ribs, four sides, five ribs, five sides or six ribs, six sides.
The scheme that the utility model adopts compared with prior art has following advantage: (1) tooth is pushing through in the journey scraping of rock because many rib and side, improved flank to scrape crowded ability, increased the scraping volume of tooth to rock; (2) crowded broken rock is scraped in the slippage that helps single-cone rotary drill bit, can obtain than the higher efficiency of breaking rock of existing single-cone rotary drill bit tooth; (3) it is in extensive range that profile of tooth of the present utility model adapts to the stratum, can increase the rib number and the number of sides of tooth according to the hardness on stratum.
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the single taper prismatic tooth in the utility model profile of tooth;
Fig. 2 is the vertical view of single taper prismatic tooth;
Fig. 3 is the multiple taper prismatic tooth in the utility model profile of tooth;
Fig. 4 is the vertical view of multiple taper prismatic tooth;
Among the figure: 1. tooth post, 2. scraping and cutting side surface, 3. outer convex surface tooth top, 4. scraping and cutting edge, the 5. multiple conical surface.
In Fig. 1, single taper prismatic tooth is made up of a cylin-drical tooth post 1, scraping and cutting side surface 2, outer convex surface tooth top 3, scraping and cutting edge 4, and tooth top is a spirogyrate curved surface; In Fig. 3, multiple taper prismatic tooth is made up of tooth post 1, scraping and cutting side surface 2, tooth top 3, scraping and cutting edge 4, the multiple conical surface 5, and tooth top is a spirogyrate curved surface.A and B are the angle of adjacent two sides in Fig. 2 and Fig. 4, and the scope at A angle is 50 °～150 °; The B angle equals or is not equal to the 2A angle.Profile of tooth also can be four ribs, four sides, five ribs, five sides or six ribs, six sides.More than these constitute profile of tooth key element of the present utility model.The multiple conical surface 5 can decide what to use according to the character of formation drilling.
Tooth of the present utility model adopts Talide or ceramal composite material.
Tooth of the present utility model is applicable to rock bit.
Claims (4)
1. a profile of tooth that is used for rock bit mainly is made up of cylin-drical tooth post (1), scraping and cutting side surface (2), outer convex surface tooth top (3), scraping and cutting edge (4), it is characterized in that: on the basis of existing two sides of original chisel teeth, increased a side again; Or on the frustum part of original conical tooth, cut three planes or curved surface, more than so just being equivalent on the basis of former chisel teeth a rib and a face; Tooth top (3) is a spirogyrate curved surface.
2. profile of tooth according to claim 1 is characterized in that: the rib between side and other side can not be too sharp-pointed: tooth has forward and two kinds of motions of rotation with respect to rock.
3. profile of tooth according to claim 1 is characterized in that: the rib number of tooth and number of sides are minimum to be three, and when being used for hard or hard formation, the rib number of tooth and number of sides can increase to four ribs, four sides, five ribs, five sides or six ribs, six sides.
4. profile of tooth according to claim 1 is characterized in that: as seen, A and B are the angle of adjacent two sides from vertical view, and the scope at A angle is 50 °～150 °; The B angle equals or is not equal to the 2A angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01206800 CN2490305Y (en) | 2001-07-10 | 2001-07-10 | Tooth form for tri-cone rotary drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01206800 CN2490305Y (en) | 2001-07-10 | 2001-07-10 | Tooth form for tri-cone rotary drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2490305Y true CN2490305Y (en) | 2002-05-08 |
Family
ID=33627367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01206800 Expired - Fee Related CN2490305Y (en) | 2001-07-10 | 2001-07-10 | Tooth form for tri-cone rotary drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2490305Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132874B (en) * | 2005-03-07 | 2010-04-07 | 株式会社宫永 | Drill |
| CN102959176A (en) * | 2010-06-24 | 2013-03-06 | 贝克休斯公司 | Cutting elements for downhole cutting tools |
| CN104806172A (en) * | 2015-05-13 | 2015-07-29 | 北京金工万邦石油技术开发有限公司 | Special-shaped PDC (polycrystalline diamond compact) cutting tooth drill bit |
| CN110145239A (en) * | 2019-05-20 | 2019-08-20 | 中国地质大学（北京） | It drills inserted, rock bit and drills inserted processing method |
-
2001
- 2001-07-10 CN CN 01206800 patent/CN2490305Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101132874B (en) * | 2005-03-07 | 2010-04-07 | 株式会社宫永 | Drill |
| CN102959176A (en) * | 2010-06-24 | 2013-03-06 | 贝克休斯公司 | Cutting elements for downhole cutting tools |
| CN102959176B (en) * | 2010-06-24 | 2015-08-12 | 贝克休斯公司 | For the cutting element of down-hole cutting element |
| CN104806172A (en) * | 2015-05-13 | 2015-07-29 | 北京金工万邦石油技术开发有限公司 | Special-shaped PDC (polycrystalline diamond compact) cutting tooth drill bit |
| CN110145239A (en) * | 2019-05-20 | 2019-08-20 | 中国地质大学（北京） | It drills inserted, rock bit and drills inserted processing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |