CN2236540Y - Dual core drill bit - Google Patents
Dual core drill bit Download PDFInfo
- Publication number
- CN2236540Y CN2236540Y CN 95219001 CN95219001U CN2236540Y CN 2236540 Y CN2236540 Y CN 2236540Y CN 95219001 CN95219001 CN 95219001 CN 95219001 U CN95219001 U CN 95219001U CN 2236540 Y CN2236540 Y CN 2236540Y
- Authority
- CN
- China
- Prior art keywords
- drill bit
- polycrystalline diamond
- reaming hole
- hole
- hole body
- 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
The utility model belongs to the innovation design of a dual-core drill bit for oil drilling. The service life of the drill bit can be extended because of the adoption of a cutting element which is inlaid by a triangular polycrystalline diamond and a conical polycrystalline diamond in a mixed way. An inclined water hole is arranged on a hole enlarging body. A diameter shrinking and efficiency increasing chip removing ring is connected between the hole enlarging body and a hole leading body. Thus, the cooling and cleaning functions can be enhanced to guarantee the good use effect of the drill bit.
Description
The utility model belongs to the transformation of oil drilling with carcass diplocardia drill bit.
In oil deep drilling and sidetracking operation, adopt the diplocardia drill bit can get out a larger-diameter well, increase sleeve pipe and the borehole wall one annular clearance, help improving cementing quality; In easy undergauge well section, adopt the diplocardia drill bit to creep into, can reduce lock of tool drilling.
Present appreciable carcass diplocardia drill bit is a river stone---the S28-248 drill bit of Clayton Christensen's drill bit Co., Ltd, its cutting teeth is single triangle polycrystalline diamond, and the cutting teeth of reaming hole body region relies on the drilling fluid that returns on the leading body runner of bottom to cool off and cleans.The bit cutting tooth is in shearing broken rock process, and it is easily cataclasm to run into bad ground, has reduced the application life of drill bit; The cutting teeth of reaming hole body region has influenced the result of use of drill bit owing to can not cool off effectively and clean.
The purpose of this utility model is will provide a kind of and inlay the combined cut tooth and establish an oblique hydrophthalmia and be connected between leading body and the reaming hole body at the reaming hole body region-the carcass diplocardia drill bit of undergauge synergy chip removal ring.Because the triangle polycrystalline diamond is to shear brokenly rock (shear strength of rock is lower), pressure holding is imitated just less, makes drill bit have higher rate of penetration; And the higher conical polycrystalline diamond of abrasion resistance and shear strength is cut the effect fractured rock with plough, is adapted to the staggered frequent more abominable drilling condition in stratum and down-hole of soft or hard, helps the application life of director's drill bit.When creeping into, go out the higher conical polycrystalline diamond of sword and at first the stratum is dug roughly, shear brokenly rock by the triangle polycrystalline diamond again.Both complement each other, and have improved the functional performance of drill bit, solved single triangle polycrystalline diamond compact bit because broken tooth breaking rate is higher, and application life are than short problem.Because an oblique hydrophthalmia is established in reaming hole body bottom, the reaming hole body that has changed general diplocardia drill bit only depends on by the drilling fluid that returns on the leading body runner of bottom and cools off the situation of cleaning.Add that being connected undergauge synergy row between leading body and reaming hole body cuts ring, make that return on the landwaste by the leading body position of reaming hole body one side to the undergauge synergy chip removal ring also can discharging than large space through reaming hole body opposite, changed the situation that general diplocardia drill bit can only return by the landwaste at the leading body position of reaming hole body one side on reaming hole body runner, improved the cooling cleaning action of drill bit, made drill bit have result of use preferably.
The utility model is to realize like this; Establish an oblique hydrophthalmia [5] in the reaming hole body bottom of drill bit; Between leading body and reaming hole body, be connected a undergauge synergy chip removal ring [5]; Stud with triangle polycrystalline diamond [1] and conical polycrystalline diamond [2] on leading body and the reaming hole surface as cutting element.
Figure of description.
Fig. 1. a kind of carcass diplocardia drill bit
Description of drawings:
1. conical polycrystalline diamond 2. triangle polycrystalline diamonds
3. leading body 4. undergauge synergy chip removal rings
5. oblique hydrophthalmia 6. reaming hole bodies
Now the utility model will be further described in conjunction with the accompanying drawings: in drilling process, at first carcass diplocardia drill bit is connected then lower going-into-well with down-hole equipment at the bottom of, begin the rotation pressurization and creep into.Owing to the utlity model has eccentric structure, thereby in rotary course, can get out a well bigger than drill bit nominal size.Like this, can increase the annular clearance between the sleeve pipe and the borehole wall, help improving cementing quality.If in easy undergauge subterranean wells section, use the utility model to creep into, because the well that gets out is bigger, can prevent lock of tool drilling.
Because the abrasion resistance of conical polycrystalline diamond [1] and triangle polycrystalline diamond [2] is strong, the efficiency of breaking rock height, the reaming hole body region is set up the hydrophthalmia [5] of certain angle and size, be connected a undergauge synergy chip removal ring again between leading body and the reaming hole body, thereby the utlity model has rate of penetration and application life than characteristics such as height.In oil deep drilling and sidetracking operation, use the utility model can obtain significant technical economic benefit.
Claims (1)
1. carcass diplocardia drill bit is made up of leading body [3] and reaming hole body [6], it is characterized in that establishing in reaming hole body bottom an oblique hydrophthalmia [5]; Between leading body and reaming hole body, be connected a undergauge synergy chip removal ring [5]; Stud with triangle polycrystalline diamond [1] and conical polycrystalline diamond [2] on leading body and the reaming hole surface as cutting element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219001 CN2236540Y (en) | 1995-07-26 | 1995-07-26 | Dual core drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219001 CN2236540Y (en) | 1995-07-26 | 1995-07-26 | Dual core drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2236540Y true CN2236540Y (en) | 1996-10-02 |
Family
ID=33867323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95219001 Expired - Fee Related CN2236540Y (en) | 1995-07-26 | 1995-07-26 | Dual core drill bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2236540Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321609A (en) * | 2013-05-16 | 2013-09-25 | 巴州派特罗尔石油钻井技术服务有限公司 | Novel drilling and reaming tool |
| CN104747087A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Self-cleaning reamer blade for large-diameter reaming |
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
-
1995
- 1995-07-26 CN CN 95219001 patent/CN2236540Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321609A (en) * | 2013-05-16 | 2013-09-25 | 巴州派特罗尔石油钻井技术服务有限公司 | Novel drilling and reaming tool |
| CN104747087A (en) * | 2013-12-31 | 2015-07-01 | 中国石油化工集团公司 | Self-cleaning reamer blade for large-diameter reaming |
| CN113404435A (en) * | 2021-07-12 | 2021-09-17 | 潍坊盛德石油机械制造有限公司 | Eccentric drill bit and drilling equipment |
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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 |