CN201318127Y - Wedge-circular combination tooth PDC bit - Google Patents
Wedge-circular combination tooth PDC bit Download PDFInfo
- Publication number
- CN201318127Y CN201318127Y CNU2009201056051U CN200920105605U CN201318127Y CN 201318127 Y CN201318127 Y CN 201318127Y CN U2009201056051 U CNU2009201056051 U CN U2009201056051U CN 200920105605 U CN200920105605 U CN 200920105605U CN 201318127 Y CN201318127 Y CN 201318127Y
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- CN
- China
- Prior art keywords
- pdc
- wedge
- drill bit
- tooth
- chisel teeth
- 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 - Fee Related
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Abstract
A wedge-circular combination tooth PDC bit is made of a wedge PDC combination tooth and a circular PDC blade, wherein the wedge PDC combination tooth is formed by welding a wedge PDC blade and an identical hard impregnated segment containing nature diamond or artificial polycrystalline diamond sheets. The wedge-circular combination tooth PDC bit is mainly used to drill strata of interbedded competent plastic tight shale and hard sand, and can increase drilling speed.
Description
Technical field
The utility model relates to field drilling wells such as oil, coalfield, mine, geology with artificial dimond synneusis compact bit, is generally called the PDC drill bit.Be primarily aimed at fine and close hard plasticity mudstone stratum and on drill bit, mix insertedly with the wedge shape PDC composite teeth of a kind of novel wedge shape PDC sheet and impregnated composition and circular PDC tooth, reach the purpose of raising rate of penetration, belong to machinery manufacturing technology field.
Background technology
The PDC drill bit is widely used in soft-medium hard formations such as oil, coalfield, and not only the drilling depth height reach hundreds of rice to several kms, and drilling speed generally also is higher than rock bit.But run into the hard plasticity mud stone folder argillaceous sandstone of big section compacting in deep-well, the PDC sheet is difficult for the wedging stratum, rate of penetration generally 0.5-1 rice/hour about.Rock bit is on such stratum, and drilling speed is also very slow and the PDC drill bit is similar, and this class stratum is to run into the stratum of difficult brill in the present deep drilling.In order to improve the rate of penetration of PDC drill bit in this class stratum, bit designer have proposed the PDC drill bit that sharp circle mixes the cloth tooth.On drill tip, with the proud exposure of wedge shape PDC tooth than the high 1-2 millimeter of knuckle-tooth.Like this, chisel teeth is easy to wedge the stratum because contact area is very little, and the shaft bottom forms the dome ridge, and the knuckle-tooth of back just is easy to the breakover fragmentation of projection has been cut.Improved drilling speed greatly on this class stratum, but owing to contain sand streak in the stratum, the very easy blunt of wedge angle behind the work certain hour, along with the blunt of chisel teeth, the very fast decline of PDC drill bit drilling speed, last and common PDC drill bit difference is little.Like this, improve the key that has become sharp round combination tooth PDC drill bit friction durability of wedge shape PDC tooth.
The utility model content
The purpose of this utility model is the deficiency at prior art, and a kind of PDC sheet and natural diamond or the impregnated block welding of diamond glomerocryst hard material wedge shape PDC composite teeth together that can be more wear-resisting than existing wedge shape PDC dental transition be provided.Can increase the abrasion resistance and the life-span of chisel teeth.
The purpose of this utility model is achieved by the following technical solution:
A kind of point circle combination tooth PDC drill bit, divide arrange chisel teeth and cylin-drical tooth on the drill bit, the cross sectional shape of chisel teeth is clipped two arc back rest parts for the straight line that intersects on the circumference with two with a circle, and two straight lines have formed the cusped edge end of chisel teeth at the intersection point place of circumference.Chisel teeth along it axially successively by thick 3-4 millimeter PDC sheet and the same shape of thick 6-8 millimeter and include natural diamond or the hard material matrix of impregnated of diamond glomerocryst thin slice is welded together to form.Impregnated is positioned at hard material matrix cusped edge end and presses close to the PDC sheet.The cylindrical PDC tooth depth of the aspect ratio of chisel teeth on the PDC drill tip goes out the 1-2 millimeter.Impregnated of hard material is by hot pressed sintering the thin slice of thick 2-3 millimeters thick to be contained the hot pressing thin slice of natural diamond or the top that thick 1.5-2 millimeter diamond glomerocryst thin slice is embedded in the wedge shape tip surface.Behind PDC sheet points wear 1-2 millimeter, the natural diamond or the diamond synneusis sheet that are set in impregnated tip, back are just devoted oneself to work, increase the abrasion resistance of wedge shape composite teeth, prolong the working life of chisel teeth, thereby improve point circle combination tooth PDC drill bit in the application life of boring hard plasticity mud stone and burning into sand rock stratum.Wedge shape PDC composite teeth proud exposure on drill bit guarantees chisel teeth wedging stratum earlier than the high 1-2 millimeter of circular PDC sheet, so that circular PDC tooth better cuts fractured rock, obtains higher drilling speed.
In sum, the utlity model has following advantage:
1. the utility model provides a kind of novel wedge shape PDC sheet and impregnated composite teeth of hard material, and it has than the single wear-resisting performance of wedge shape composite sheet dental transition.
2. stud with natural diamond hot pressing thin slice or diamond glomerocryst thin slice on the tooth wedge shape rib of this novel PDC composite teeth, can increase the abrasion resistance of wedge shape tip surface.
Description of drawings
Fig. 1 is a wedge shape PDC composite teeth, has the impregnated generalized section that wedge shape PDC sheet and hard material add natural diamond hot pressing sheet or diamond glomerocryst thin slice.
Fig. 2 is a point circle wedge shape PDC composite teeth cloth tooth principle schematic when mixing the PDC bit cutting fractured rock of cloth tooth.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
Be illustrated in figure 1 as a kind of novel wedge shape PDC composite teeth of the utility model, it comprises that the wedge shape PDC sheet 1 of thick 3-4 millimeter and impregnated 2 of the hard material wedge shape that welds together reach flat natural diamond hot pressing sheet or the diamond glomerocryst thin slice 3 that studs with the 1-3 millimeter at impregnated cusped edge place.Because adamantine abrasion resistance is higher than the PDC sheet, behind the little height of wedge shape PDC pad wear, after just devoting oneself to work, natural diamond can increase the abrasion resistance of wedge shape PDC composite teeth, keep the broken rock characteristics of point circle combination tooth PDC drill bit in fine and close mud stone.As shown in Figure 2.
It should be noted that at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (3)
1. a point is justified combination tooth PDC drill bit, divide arrange chisel teeth and cylin-drical tooth on the drill bit, the cross sectional shape that it is characterized in that chisel teeth is clipped two arc back rest parts for the straight line that intersects on the circumference with two with a circle, article two, straight line has formed the cusped edge end of chisel teeth at the intersection point place of circumference, this chisel teeth along it axially successively by thick 3-4 millimeter PDC sheet and the same shape of thick 6-8 millimeter and include natural diamond or the hard material matrix of impregnated of diamond glomerocryst thin slice is welded together to form.
2. drill bit as claimed in claim 1 is characterized in that, impregnated is positioned at hard material matrix cusped edge end and presses close to the PDC sheet.
3. drill bit according to claim 1 and 2 is characterized in that, the cylindrical PDC tooth depth of the aspect ratio of chisel teeth on the PDC drill tip goes out the 1-2 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201056051U CN201318127Y (en) | 2009-01-23 | 2009-01-23 | Wedge-circular combination tooth PDC bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201056051U CN201318127Y (en) | 2009-01-23 | 2009-01-23 | Wedge-circular combination tooth PDC bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201318127Y true CN201318127Y (en) | 2009-09-30 |
Family
ID=41196893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201056051U Expired - Fee Related CN201318127Y (en) | 2009-01-23 | 2009-01-23 | Wedge-circular combination tooth PDC bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201318127Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303192A (en) * | 2011-05-06 | 2012-01-04 | 成都比拓超硬材料有限公司 | Method for improving applicability of polycrystalline diamond composite sheet serving as drill tooth/cutter tooth |
| CN103061676A (en) * | 2013-01-14 | 2013-04-24 | 山东国岳金刚石制品有限公司 | Ploughing-cutting type diamond bit |
-
2009
- 2009-01-23 CN CNU2009201056051U patent/CN201318127Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303192A (en) * | 2011-05-06 | 2012-01-04 | 成都比拓超硬材料有限公司 | Method for improving applicability of polycrystalline diamond composite sheet serving as drill tooth/cutter tooth |
| CN103061676A (en) * | 2013-01-14 | 2013-04-24 | 山东国岳金刚石制品有限公司 | Ploughing-cutting type diamond bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20170809 Granted publication date: 20090930 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20190123 Granted publication date: 20090930 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090930 Termination date: 20180123 |