CN2227191Y - Steel type core bit - Google Patents
Steel type core bit Download PDFInfo
- Publication number
- CN2227191Y CN2227191Y CN 95241581 CN95241581U CN2227191Y CN 2227191 Y CN2227191 Y CN 2227191Y CN 95241581 CN95241581 CN 95241581 CN 95241581 U CN95241581 U CN 95241581U CN 2227191 Y CN2227191 Y CN 2227191Y
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- China
- Prior art keywords
- steel
- wing
- teeth
- core bit
- utility
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- Expired - Fee Related
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Abstract
The utility model provides a steel body type core-taking drill bit which comprises a main body with an inner hole, wherein a core-taking tool is arranged in the inner hole of the main body. The utility model is characterized in that at least two cutter wings are arranged on the main body, and at least one hard alloy diameter-keeping tooth and a PDC cutting tooth which are used for keeping the hole diameter of a well hole and cutting the well bottom are arranged on the cutter wings. Because the utility model omits a crown carcass of the drill bit, the utility model avoids the problem of easy crack generation existing in the use process of the drill bit; because the utility model is provided with a sintering crown carcass, the manufacturing cost of the utility model is obviously reduced.
Description
The utility model relates to a kind of drilling tool, particularly a kind of steel body formula core bit.
Core bit commonly used normally connects a steel joint on the drill bit carcass, cutting element adopts ballas (TSP), natural diamond or PDC sheet, and the shape of PDC sheet can be disk or cigarette end shape.Its manufacture method is that sintering goes out a bizet carcass, by butt welding joint is welded to (joint adopts the connection button-type of core barrel) on the carcass again.Shortcomings such as not only there is the manufacturing cost height in above-mentioned drill bit, and manufacturing time is long, and in use be prone to crackle.
The purpose of this utility model is to provide a kind of low cost of manufacture, in use is not prone to the steel body formula core bit of crackle.
The utility model provides a kind of steel body formula core bit, comprise the main body of being with endoporus, in the main body endoporus coring tool is arranged, it is characterized in that main body is provided with at least two wings, wing is provided with at least one carbide alloy gauge teeth and the PDC cutting teeth that can keep wellhole aperture and cutting shaft bottom.In the utility model owing to cancelled the drill bit carcass, the therefore crack problem of having avoided drill bit in use to be prone to, and because sintering bizet carcass not obviously reduces manufacturing cost of the present utility model.
Above-mentioned wing is the steel wing, the steel wing type that is in line on body surfaces.Owing to adopt the steel wing, it is longer than conventional type to mill length of said joint.
Above-mentioned steel wing becomes oblique angle type completely on body surfaces.
Above-mentioned steel wing becomes oblique angle type partly on body surfaces.The quantity of wing and thickness are decided according to the drilling condition of bit size and drill bit preparation use in the utility model.It is 3 inches～12.25 inches serial drill bit that the utility model can produce outside diameter.
Above-mentioned gauge teeth comprises inside and outside gauge teeth, and inside and outside gauge teeth is connected in steel wing top and bottom sides edge at interval definitely.Described external diameter tooth is a carbide alloy, and drill bit is protected.
Above-mentioned cutting teeth is the PDC tooth of disk, and the PDC space of teeth is connected in steel wing bottom and bottom sides edge definitely.Because the steel wing be to process separately, so the profile of wing, and the quantity and the size of gauge teeth and cutting teeth can both be decided according to on-the-spot instructions for use on the wing.
All be coated with topping on above-mentioned steel wing and inside and outside gauge teeth and the cutting teeth, topping adopts hot spraying to prevent erosion in advance.
The utlity model has following advantage:
In the utility model owing to cancelled the drill bit carcass, the therefore crack problem of having avoided drill bit in use to be prone to.
2. because sintering bizet carcass not obviously reduces manufacturing cost of the present utility model.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
The assembly structure schematic diagram of the 1st kind of embodiment of Fig. 1 the utility model.
Fig. 2 is the structural representation of looking up of Fig. 1.
The assembly structure schematic diagram of the 2nd kind of embodiment of Fig. 3 the utility model.
Fig. 4 is the structural representation of looking up of Fig. 3.
Embodiment 1:
With reference to figure 1, Fig. 2: the utility model comprises main body 4, have the endoporus 6 that has three taper holes in the main body 4, coring tool 5 is arranged in the endoporus 6, the lower end of coring tool 5 places the junction of two taper holes, main body 4 is provided with eight wings 2, wing 2 is welded to connect with the front end of main body 4, wing 2 is the steel wing, steel wing 2 type that is in line on main body 4 surfaces, each wing 2 is provided with three gauge teeths 3 and four cutting teeths 1 that can keep wellhole hole wall and cutting shaft bottom, gauge teeth 3 comprises two outer gauge teeths and an interior gauge teeth 3, two outer gauge teeths 3 are connected in steel wing 2 upper edge edges at interval definitely, and an interior gauge teeth 3 is connected on the bottom side edge of steel wing 2, two outer gauge teeths 3 are carbide alloy.Cutting teeth 1 is the PDC tooth of disk, and the PDC space of teeth is connected in steel wing 2 bottoms and bottom sides edge definitely, all is coated with topping on steel wing 2 and inside and outside gauge teeth 3 and cutting teeth 1.
Embodiment 2:
Substantially the same manner as Example 1 with reference to figure 3, Fig. 4: embodiment 2, different is to have the alternate endoporus 7 of awl straight hole in main body 4, coring tool 5 is arranged in the endoporus 7, and the lower end of coring tool 5 places the junction of the 3rd straight hole and taper hole.Each wing 2 is provided with four gauge teeths 3 and four cutting teeths 1 that can keep wellhole hole wall and cutting shaft bottom, gauge teeth 3 comprises three outer gauge teeths 3 and an interior gauge teeth 3, three outer gauge teeths 3 are connected in the upper edge edge of steel wing 2 at interval definitely, an interior gauge teeth 3 is connected on the bottom side edge of steel wing 2, and three outer gauge teeths 3 are carbide alloy.Four cutting teeths 1 are the PDC tooth of disk, and the PDC space of teeth is connected in steel wing 2 bottoms and bottom sides definitely along last.
Claims (7)
1, a kind of steel body formula core bit, comprise the main body of being with endoporus, in the main body endoporus coring tool is arranged, it is characterized in that described main body is provided with at least two wings, wing is provided with at least one carbide alloy gauge teeth and the PDC cutting teeth that can keep wellhole aperture and cutting shaft bottom.
2, steel body formula core bit according to claim 1 is characterized in that described wing is the steel wing, the steel wing type that is in line on body surfaces.
3, steel body formula core bit according to claim 1 is characterized in that described steel wing becomes plagiohedral completely on body surfaces.
4, steel body formula core bit according to claim 1 is characterized in that described steel wing becomes oblique angle type partly on body surfaces.
5, steel body formula core bit according to claim 1 is characterized in that described gauge teeth comprises inside and outside gauge teeth, and inside and outside gauge teeth is connected in steel wing top and bottom sides edge at interval definitely.
6, steel body formula core bit according to claim 1 is characterized in that described cutting teeth is the PDC tooth of disk, and the PDC space of teeth is connected in steel wing bottom and bottom sides edge definitely.
7, steel body formula core bit according to claim 1 is characterized in that all being coated with topping on described steel wing and inside and outside gauge teeth and the cutting teeth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95241581 CN2227191Y (en) | 1995-05-11 | 1995-05-11 | Steel type core bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95241581 CN2227191Y (en) | 1995-05-11 | 1995-05-11 | Steel type core bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2227191Y true CN2227191Y (en) | 1996-05-15 |
Family
ID=33882718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95241581 Expired - Fee Related CN2227191Y (en) | 1995-05-11 | 1995-05-11 | Steel type core bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2227191Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061921A (en) * | 2010-12-24 | 2011-05-18 | 西安科技大学 | Down-dip mining method of shaped hydraulic bracket on long-wall working surface in direction of large dip angle coal bed |
| CN102536123A (en) * | 2012-01-16 | 2012-07-04 | 三原石油钻头厂 | Gas lift reverse circulation diamond bit |
| CN104024556A (en) * | 2011-06-22 | 2014-09-03 | 史密斯国际公司 | Fixed cutter drill bit with core fragmentation feature |
| US9366090B2 (en) | 2011-02-10 | 2016-06-14 | Smith International, Inc. | Kerfing hybrid drill bit and other downhole cutting tools |
-
1995
- 1995-05-11 CN CN 95241581 patent/CN2227191Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061921A (en) * | 2010-12-24 | 2011-05-18 | 西安科技大学 | Down-dip mining method of shaped hydraulic bracket on long-wall working surface in direction of large dip angle coal bed |
| CN102061921B (en) * | 2010-12-24 | 2013-01-02 | 西安科技大学 | Down-dip mining method of shaped hydraulic bracket on long-wall working surface in direction of large dip angle coal bed |
| US9366090B2 (en) | 2011-02-10 | 2016-06-14 | Smith International, Inc. | Kerfing hybrid drill bit and other downhole cutting tools |
| US9404312B2 (en) | 2011-02-10 | 2016-08-02 | Smith International, Inc | Cutting structures for fixed cutter drill bit and other downhole cutting tools |
| US10851594B2 (en) | 2011-02-10 | 2020-12-01 | Smith International, Inc. | Kerfing hybrid drill bit and other downhole cutting tools |
| CN104024556A (en) * | 2011-06-22 | 2014-09-03 | 史密斯国际公司 | Fixed cutter drill bit with core fragmentation feature |
| US9347275B2 (en) | 2011-06-22 | 2016-05-24 | Smith International, Inc. | Fixed cutter drill bit with core fragmentation feature |
| CN104024556B (en) * | 2011-06-22 | 2016-06-29 | 史密斯国际公司 | There is the fixing teeth drill bit of core breakage properties |
| CN102536123A (en) * | 2012-01-16 | 2012-07-04 | 三原石油钻头厂 | Gas lift reverse circulation diamond bit |
| CN102536123B (en) * | 2012-01-16 | 2014-08-13 | 三原石油钻头厂 | Gas lift reverse circulation diamond bit |
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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 |