CN2876306Y - Knife wing type PDC drill - Google Patents
Knife wing type PDC drill Download PDFInfo
- Publication number
- CN2876306Y CN2876306Y CN 200620019100 CN200620019100U CN2876306Y CN 2876306 Y CN2876306 Y CN 2876306Y CN 200620019100 CN200620019100 CN 200620019100 CN 200620019100 U CN200620019100 U CN 200620019100U CN 2876306 Y CN2876306 Y CN 2876306Y
- Authority
- CN
- China
- Prior art keywords
- wing
- bit
- knife
- pdc
- drill bit
- 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)
- Drilling Tools (AREA)
Abstract
The utility model discloses a kind of knife-winged PDC bit used in the artesian wells of oil and natural gas, which includes the bit body, the knife wing, the PDC cutting teeth, the nozzle and the crumb discharge slot. The knife wing of the kind of knife-winged PDC bit is divided into the external knife wing and the internal knife wing; only the distance from the outer end of the external knife wing to the bit axes is equal to the radius of bit head part, while the distance from the outer end of the internal knife wing to the bit axes is less than the radius of bit head part; and the numbers of the external knife wing and the internal knife wing are equal and are arranged with intervals in the surrounding. The stability of this kind of knife-winged PDC bit is high in the drilling process and the bit balling phenomenon is not easy to happen.
Description
Technical field
The utility model relates to a kind of oil and gas well drilling drill bit, specifically, is a kind of blade PDC bit of being made up of bit matrix, wing, PDC cutting teeth, nozzle and chip area.
Background technology
The advantage that rate of penetration is fast because the PDC drill bit has in soft-medium hard formation, the life-span is long, drilling depth is many is so be widely used in oil and gas well drilling.At present mainly contain two kinds of cloth tooth modes at the PDC of usefulness drill bit.A kind of is free style cloth tooth, and the PDC cutting teeth relatively is evenly distributed on the drill bit surface, and drill bit is more steady when creeping into, but chip area is little, and the discharge of landwaste is unimpeded inadequately, and the mud drum phenomenon takes place drill bit easily.Another kind is a wing formula cloth tooth, and all PDC cutting teeths all are arranged on the wing, if the wing negligible amounts, then chip area is bigger, and drill bit just is not easy the mud drum phenomenon takes place when creeping into, but the less stable of drill bit causes drill bit to damage in advance easily; If wing quantity is more, then the stability of drill bit is than higher, but chip area is less, and the discharge resistance of landwaste is bigger, so the mud drum phenomenon takes place when creeping into drill bit easily.
Summary of the invention
The purpose of this utility model provides a kind of blade PDC bit for oil and gas well drilling exactly, has both had advantages of higher stability in drilling process, is not easy to take place the mud drum phenomenon again.
In order to achieve the above object, the utility model comprises bit matrix, wing, PDC cutting teeth, nozzle and chip area, and wing is fixed on the bit matrix, and the PDC cutting teeth is arranged on the wing, and nozzle is installed on the bit matrix; Wing has outer wing and interior wing, and the distance of the outer end of outer wing from the drill bit axle center equals the drill bit radius, the outer end of interior wing from the distance in drill bit axle center less than the drill bit radius.
The quantity of outer wing and interior wing equates, and is circumferentially spaced apart.
After adopting such structure, owing to have only the distance of outer end from the drill bit axle center of outer wing to equal the drill bit radius, and the outer end of interior wing from the distance in drill bit axle center less than the drill bit radius, so under the identical situation of wing quantity, increased the cross-sectional area of chip area, reduced the discharge resistance of landwaste, improved the velocity of discharge of landwaste, so drill bit just is not easy to take place the mud drum phenomenon when creeping into; Again because under the identical situation of cloth tooth density, total wing quantity increases, and has improved the PDC cutting teeth in the lip-deep distributed degrees of drill bit, thereby has improved the stability of drill bit.
The utility model will be illustrated in conjunction with the accompanying drawings by the specific embodiment.
Description of drawings
Fig. 1 is a kind of specific embodiment crown configurations schematic diagram of the utility model blade PDC bit.
The specific embodiment
Blade PDC bit shown in Figure 1, form by bit matrix 1, outer wing 2, interior wing 3, PDC cutting teeth 4, nozzle 5 and chip area 6, outer wing 2 and interior wing 3 are fixed on the bit matrix, and PDC cutting teeth 4 is arranged on outer wing 2 and the interior wing 3, and nozzle 5 is installed on the bit matrix 1.The distance of the outer end of outer wing 2 from the drill bit axle center equals the drill bit radius, the outer end of interior wing 3 from the distance in drill bit axle center less than the drill bit radius.The quantity of outer wing 2 and interior wing 3 is equal, and upwards spaced apart in week.
In use, at first the utility model blade PDC bit and other downhole tool are coupled together, together at the bottom of the lower going-into-well, the turn on pump circulating fluid and the rotary drilling of pressurizeing then.In drilling process, the drilling fluid that ejects from nozzle 5 constantly will be discharged to by the landwaste that PDC cutting teeth 4 machines away in the well annular space by chip area 6.Because the quantity of outer wing 2 and interior wing 3 equates, and it is upwards spaced apart in week, the cross-sectional area of each chip area 6 has all been increased, the distribution of PDC cutting teeth 4 on the drill bit end face is also more even, therefore landwaste can in time be discharged in the well annular space, prevent the bit balling phenomenon, and the stability of drill bit also can be higher.
Claims (2)
1. blade PDC bit, comprise bit matrix, wing, PDC cutting teeth, nozzle and chip area, wing is fixed on the bit matrix, the PDC cutting teeth is arranged on the wing, nozzle is installed on the bit matrix, it is characterized in that wing has outer wing (2) and interior wing (3), the distance of outer end from the drill bit axle center of outer wing (2) equals the drill bit radius, the outer end of interior wing (3) from the distance in drill bit axle center less than the drill bit radius.
2. blade PDC bit according to claim 1 is characterized in that the quantity of outer wing (2) and interior wing (3) equates, and is circumferentially spaced apart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019100 CN2876306Y (en) | 2006-04-12 | 2006-04-12 | Knife wing type PDC drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620019100 CN2876306Y (en) | 2006-04-12 | 2006-04-12 | Knife wing type PDC drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2876306Y true CN2876306Y (en) | 2007-03-07 |
Family
ID=37819543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620019100 Expired - Fee Related CN2876306Y (en) | 2006-04-12 | 2006-04-12 | Knife wing type PDC drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2876306Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
-
2006
- 2006-04-12 CN CN 200620019100 patent/CN2876306Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409980A (en) * | 2011-12-22 | 2012-04-11 | 河南神龙石油钻具有限公司 | Blade type PDC (Polycrystalline Diamond Compact) drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070307 Termination date: 20100412 |