CN202788630U - Polycrystalline diamond compact (PDC) drill bit with sharp teeth - Google Patents
Polycrystalline diamond compact (PDC) drill bit with sharp teeth Download PDFInfo
- Publication number
- CN202788630U CN202788630U CN 201220381915 CN201220381915U CN202788630U CN 202788630 U CN202788630 U CN 202788630U CN 201220381915 CN201220381915 CN 201220381915 CN 201220381915 U CN201220381915 U CN 201220381915U CN 202788630 U CN202788630 U CN 202788630U
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- drill bit
- pdc
- teeth
- sharp
- cutting teeth
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Abstract
The utility model discloses a polycrystalline diamond compact (PDC) drill bit with sharp teeth. The PDC drill bit with the sharp teeth mainly comprises a drill bit body, a PDC composite piece with round cutting teeth and a spraying nozzle, wherein sharp-angle cutting teeth are arranged among the round cutting teeth of the PDC composite piece, an exposing end of each sharp-angle cutting tooth is in a sharp-angle shape, and the sharp-angle cutting teeth are higher than exposing ends of the round cutting teeth by 0.1-1 millimeter. The sharp teeth of the drill bit are capable of reducing the contact area between the composite piece and a stratum, so that the drill bit is easier to drill into the stratum compared with an ordinary drill bit under the condition that identical drilling pressure is applied. After the sharp teeth plow open the stratum, the other teeth crash rocks, and therefore higher mechanical drilling speed is achieved.
Description
Technical field
The utility model is the improvement of a kind of petroleum gas, used for geological prospecting drilling bit.
Background technology
At present, the PDC drill bit is widely used in oil, natural gas, geological drilling, has obtained outstanding result of use, and the present and the future will have more widely application.Conventional PDC drill bit is mainly by being comprised of bit body, circular PDC composite sheet and nozzle, wherein on the circular PDC composite sheet only with circular cutting teeth, have at soft-medium hard formation that rate of penetration is fast, the advantage of long service life.But conventional PDC drill bit is when plastic formation creeps into; it is low often can rate of penetration to occur; the problems such as inefficiency; when its reason is crept on these stratum exactly; apply under the equal pressure condition; conventional circular PDC composite sheet can not produce enough broken rock pressure power in the unit area and can't the wedging stratum, and then can't carry out the volume cutting, and rate of penetration is difficult to promote.
The utility model content
It is a kind of with pointed PDC drill bit that the purpose of this utility model is to provide, and this drill bit can improve the drill bit rate of penetration at plastic formation.
For solving the problems of the technologies described above, technical solutions of the utility model are: mainly by bit body 1, form with circular cutting teeth PDC composite sheet 2 and nozzle 4, it is characterized in that adding the wedge angle cutting teeth 3 that exposure end is pointed shape between the circular cutting teeth of PDC composite sheet 2, wedge angle cutting teeth 3 exceeds 0.1～1mm than circular cutting teeth exposure end.
The wedge angle of the exposure end of wedge angle cutting teeth 3 is acute angle or obtuse angle.
PDC drill bit behind the employing such scheme, in drilling process, when the PDC bit drills is met plastic formation, apply in same the pressure of the drill situation, because pointed tooth proud exposure is high, contact first the stratum, thereby enough broken rock pressure power wedging stratum can be arranged in the unit area, pointed tooth plough is turned up the soil behind the layer, the strata pressure state changes, the scope of freedom increases, and other PDC cutting teeth carries out the volume cutting subsequently, thereby improves rate of penetration.
Description of drawings
Fig. 1 is a kind of PDC Cutter arrangement diagram with pointed tooth
Fig. 2 is a kind of PDC bit cutting structural profile with pointed tooth
Among the figure: 1. bit body 2. PDC composite sheet 3. wedge angle cutting teeths 4. nozzles
The specific embodiment
Now the utility model will be further described in conjunction with Figure of description:
The technical solution of the utility model is the improvement of carrying out on the drill bit basis that forms by bit body 1, with PDC composite sheet 2 and the nozzle 4 of circular cutting teeth.Improved emphasis adds the wedge angle cutting teeth 3 that exposure end is pointed shape between the circular cutting teeth of PDC composite sheet 2, wedge angle cutting teeth 3 exceeds 0.1～1mm than circular cutting teeth exposure end.
The wedge angle of the exposure end of wedge angle cutting teeth 3 is acute angle or obtuse angle, and global shape can be square, rhombus, polygon or any at least with the shape of a wedge angle.
In drilling process, at first the utility model and other drilling tool are coupled together, at the bottom of the lower going-into-well, then the pressurization of turn on pump circulating fluid is crept into.The utility model has adopted the PDC composite sheet of circular cutting teeth and two kinds of cutting members of wedge angle cutting teeth.Owing to there is the wedge angle cutting teeth, at plastic formation, wedge angle cutting teeth elder generation wedging stratum is so there is higher rate of penetration.Periphery at the wedge angle cutting teeth has a plurality of circular cutting teeths to carry out secondary cutting and protection simultaneously, can prolong the life-span of this drill bit.
Claims (2)
1. PDC drill bit with pointed tooth, mainly by bit body (1), form with PDC composite sheet (2) and the nozzle (4) of circular cutting teeth, it is characterized in that adding the wedge angle cutting teeth (3) that exposure end is pointed shape between the circular cutting teeth of PDC composite sheet (2), wedge angle cutting teeth (3) exceeds 0.1～1mm than circular cutting teeth exposure end.
2. a kind of PDC drill bit with pointed tooth according to claim 1, the wedge angle that it is characterized in that the exposure end of wedge angle cutting teeth (3) is acute angle or obtuse angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220381915 CN202788630U (en) | 2012-08-03 | 2012-08-03 | Polycrystalline diamond compact (PDC) drill bit with sharp teeth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220381915 CN202788630U (en) | 2012-08-03 | 2012-08-03 | Polycrystalline diamond compact (PDC) drill bit with sharp teeth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202788630U true CN202788630U (en) | 2013-03-13 |
Family
ID=47815906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220381915 Expired - Fee Related CN202788630U (en) | 2012-08-03 | 2012-08-03 | Polycrystalline diamond compact (PDC) drill bit with sharp teeth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202788630U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018783A (en) * | 2014-05-27 | 2014-09-03 | 成都来宝石油设备有限公司 | High-drilling-speed PDC drill bit |
| CN104196458A (en) * | 2014-08-26 | 2014-12-10 | 莱州市原野科技有限公司 | Sharp-tooth PDC drill bit |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
-
2012
- 2012-08-03 CN CN 201220381915 patent/CN202788630U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104018783A (en) * | 2014-05-27 | 2014-09-03 | 成都来宝石油设备有限公司 | High-drilling-speed PDC drill bit |
| CN105275403A (en) * | 2014-07-01 | 2016-01-27 | 中国石油化工集团公司 | A plowing type PDC drill bit suitable for hard formations |
| CN104196458A (en) * | 2014-08-26 | 2014-12-10 | 莱州市原野科技有限公司 | Sharp-tooth PDC drill bit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20151104 Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: SINOPEC OILFIELD SERVICE Corp. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: SHENGLI DRILLING TECHNOLOGY Research Institute OF SINOPEC |
|
| 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: 20130313 Termination date: 20210803 |