CN2410409Y - PDC drill bit capable of complete drilling bending passway - Google Patents
PDC drill bit capable of complete drilling bending passway Download PDFInfo
- Publication number
- CN2410409Y CN2410409Y CN 00224104 CN00224104U CN2410409Y CN 2410409 Y CN2410409 Y CN 2410409Y CN 00224104 CN00224104 CN 00224104 CN 00224104 U CN00224104 U CN 00224104U CN 2410409 Y CN2410409 Y CN 2410409Y
- Authority
- CN
- China
- Prior art keywords
- drill bit
- passway
- nozzle
- pdc
- curved channel
- 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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- Earth Drilling (AREA)
Abstract
The utility model relates to a PDC drill bit capable of complete drilling bending passway. The PDC drill bit capable of complete drilling bending passway is composed of a tyre body, PDC cutting teeth, and a nozzle. The PDC drill bit capable of complete drilling bending passway is characterized in that a passway between the hollow steel core of the tyre body and the nozzle is designed into the bending passway. The utility model enlarges the spraying angle of the nozzle of a diamond bit at the same radial position. The slurry jet is facilitated to clean the rock fragments out of the well bottom, the erosion of the reversed jet to the drill bit is reduced, and the service life is lengthened.
Description
The utility model relates to the comprehensive Drilling bore bit of a kind of PDC.
At present, the runner of the comprehensive Drilling bore bit of PDC of all diamond bit manufacturer production of China all adopts line flowing channel.There are some defectives at work in line flowing channel, and the one, the reverse jet that line flowing channel produces has great erosion effect to bit matrix, makes carcass easily produce cannelure, and cutting teeth comes off, and causes drill bit to damage in advance; The 2nd, line flowing channel is difficult for the bottom-hole cleaning landwaste, makes drill bit repeat the kata-rocks bits, and easily produces mud drum, has a strong impact on rate of penetration.
The purpose of this utility model is to provide a kind of PDC to creep into the curved channel drill bit comprehensively.Pass through curved channel, increase the jet angle of diamond bit hydrophthalmia, reduce of the recoil erosion effect of reverse jet to bit matrix, prolong the application life of drill bit, simultaneously, the bottom-hole cleaning landwaste reduces bit balling better, avoid the repetition fragmentation of drill bit, improve the bit speed of drill bit the shaft bottom landwaste.
The technical solution of the utility model is: the runner with the carcass steel core between the hollow and nozzle is designed to the curved channel be made up of straightway, arc section, straightway.
Owing to original line flowing channel is changed over curved channel, has increased the jet angle of diamond bit at same radius position top nozzle.The increase at nozzle ejection angle, the level that can increase current is divided speed, reduce vertical and divide speed, helping slurry jet goes out the shaft bottom in time clearly with the landwaste of PDC drill bit fragmentation and enters annular space, improve the shaft bottom cleaning performance, avoid drill bit the mud drum accident to occur, accelerate the chance that drill bit creeps into new stratum, improve rate of penetration, improve drilling benefit.Simultaneously, the increase at nozzle ejection angle can obviously reduce the erosion effect of reverse jet to the PDC drill bit, avoids bit matrix cannelure to occur, and cutting point comes off, and prolongs drilling life of bit.
Fig. 1 is the utility model carcass structure schematic diagram;
Fig. 2 creeps into the position schematic diagram for the utility model.
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing.
As shown in the figure, the utility model is made of carcass 1, PDC cutting teeth 5, nozzle 6, the PDC cutting teeth is arranged on the carcass bottom, nozzle is arranged on the carcass, and the central upper portion of carcass is that steel core is hollow 2, and the bottom of carcass is the nozzle connecting hole, between the hollow and nozzle connecting hole of steel core is curved channel 3, curved channel is made of for three sections straightway, arc section, straightway, and its arc section is between two straightways, and to the carcass center curvature.
Owing to be designed to curved channel, increased the jet angle of diamond bit at same radius position top nozzle, the jet angle of its curved channel nozzle is than big 0～40 degree of jet angle of line flowing channel nozzle.
Claims (3)
1, a kind of PDC creeps into the curved channel drill bit comprehensively, is made of carcass, PDC cutting teeth, nozzle, it is characterized in that: the runner at the carcass steel core between the hollow and nozzle is designed to the curved channel be made up of straightway, arc section, straightway.
2, PDC according to claim 1 creeps into the curved channel drill bit comprehensively, and the arc section that it is characterized in that curved channel is to the carcass center curvature.
3, PDC according to claim 1 and 2 creeps into the curved channel drill bit comprehensively, it is characterized in that jet angle big 0～40 degree of the jet angle of curved channel nozzle on identical drill bit radial location than line flowing channel nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224104 CN2410409Y (en) | 2000-01-22 | 2000-01-22 | PDC drill bit capable of complete drilling bending passway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00224104 CN2410409Y (en) | 2000-01-22 | 2000-01-22 | PDC drill bit capable of complete drilling bending passway |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2410409Y true CN2410409Y (en) | 2000-12-13 |
Family
ID=33588545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00224104 Expired - Fee Related CN2410409Y (en) | 2000-01-22 | 2000-01-22 | PDC drill bit capable of complete drilling bending passway |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2410409Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104251121A (en) * | 2014-09-18 | 2014-12-31 | 武汉地大长江钻头有限公司 | PDC drill bit capable for forming coarse particle rock cuttings and suitable for petroleum exploratory well |
| CN105765152A (en) * | 2013-11-20 | 2016-07-13 | 长年Tm公司 | Drill bits having blind-hole flushing and systems for using same |
| US9903165B2 (en) | 2009-09-22 | 2018-02-27 | Longyear Tm, Inc. | Drill bits with axially-tapered waterways |
-
2000
- 2000-01-22 CN CN 00224104 patent/CN2410409Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9903165B2 (en) | 2009-09-22 | 2018-02-27 | Longyear Tm, Inc. | Drill bits with axially-tapered waterways |
| CN105765152A (en) * | 2013-11-20 | 2016-07-13 | 长年Tm公司 | Drill bits having blind-hole flushing and systems for using same |
| CN104251121A (en) * | 2014-09-18 | 2014-12-31 | 武汉地大长江钻头有限公司 | PDC drill bit capable for forming coarse particle rock cuttings and suitable for petroleum exploratory well |
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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 |