CN2402793Y - Petroleum and natural gas drilling bit - Google Patents
Petroleum and natural gas drilling bit Download PDFInfo
- Publication number
- CN2402793Y CN2402793Y CN 99244011 CN99244011U CN2402793Y CN 2402793 Y CN2402793 Y CN 2402793Y CN 99244011 CN99244011 CN 99244011 CN 99244011 U CN99244011 U CN 99244011U CN 2402793 Y CN2402793 Y CN 2402793Y
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- CN
- China
- Prior art keywords
- composite sheet
- hard
- drilling
- drilling bit
- pdc
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model belongs to the improvement of the structure of a PDC drilling bit for drilling wells of petroleum and natural gas. The utility model is mainly characterized in that the surface of a base body of the drilling bit is inlaid with a composite sheet and is also inlaid with hard-alloy cutting teeth, and the hard-alloy cutting teeth are distributed on the back face of the composite sheet. In the normal drilling process, the hard-alloy cutting teeth has the auxiliary cutting function; when the drilling bit meets a hard sandwich layer, the existence of the hard-alloy cutting teeth enhances the anti-impact performance of the PDC composite sheet, thus, the ability of the drilling bit for drilling and penetrating hard sandwich layers is improved, and the service life of the drilling bit is extended.
Description
The utility model belongs to the architecture advances of oil and gas well drilling PDC drill bit.
When common PDC drill bit crept in soft formation, rate of penetration was fast, drilling depth is many, but in containing the stratum of hard interbedded layer, impact failure easily takes place the PDC composite sheet, made the drill bit ability of losing the job.The main cause that causes this kind phenomenon is that the broken rock mode of PDC drill bit is to shear, and the shear strength height of hard interbedded layer, thereby the PDC composite sheet is being born very big twisting resistance in drilling process, causes the drill bit twisting vibration easily, causes PDC composite sheet impact failure.
The bad main cause of common PDC drill bit drilling effect in hard interbedded layer is that drill bit has only a kind of cutting members of PDC composite sheet, and the utility model except that the PDC composite sheet insert carbide cutting tooth.The carbide cutting tooth is arranged in PDC composite sheet back, and lower than the exposure of PDC composite sheet.In the normal drilling process, the carbide cutting tooth plays the assisted machining effect, thereby the utlity model has with the equally good service behaviour of common PDC drill bit.The existence of carbide cutting tooth has strengthened the impact resistance of PDC composite sheet, thereby when the utility model bores the chance hard interbedded layer, can prevent that the PDC composite sheet from exempting from impact failure, so the utlity model has the ability that drills hard interbedded layer.The purpose of this utility model provides a kind of oil and gas well drilling drill bit that can effectively creep in containing the stratum of hard interbedded layer.
A kind of oil and gas well drilling drill bit mainly is made up of bit body, PDC composite sheet, carbide cutting tooth and nozzle.All arrange a carbide cutting tooth after each PDC composite sheet, distance is 5～10mm between the two, and the exposure of carbide cutting tooth is than the low 0.7～1.2mm of PDC composite sheet.
Because the utility model has all been arranged the carbide cutting tooth in each PDC composite sheet back, strengthened the ability that the shock resistance of PDC composite sheet damages, thereby when the utility model bores the chance hard interbedded layer, reduced the possibility that the PDC composite sheet is damaged greatly, prevented that drill bit from damaging in advance.And the utility model has with the equally good service behaviour of common PDC drill bit when creeping in soft formation, therefore, creep in containing the stratum of hard interbedded layer, the life-span of the present utility model is long, average rate of penetration is high, can save a large amount of drilling costs, remarkable in economical benefits.
Figure of description:
Fig. 1. a kind of cutting members of oil and gas well drilling drill bit is arranged schematic diagram
Fig. 2. a kind of cutting structure sectional drawing of oil and gas well drilling drill bit
Description of drawings:
1. bit body 2.PDC composite sheet 3. carbide cutting teeth 4. nozzles
Now the utility model will be further described in conjunction with Figure of description:
In drilling process, at first the utility model and other downhole tool are coupled together, at the bottom of the lower going-into-well, the turn on pump circulating fluid and the rotary drilling of pressurizeing then.The utility model has adopted PDC composite sheet [2] and [3] two kinds of cutting members of carbide cutting tooth, and carbide cutting tooth [3] is arranged in PDC composite sheet [2] afterwards, and the exposure of carbide cutting tooth [3] is lower than the exposure of PDC composite sheet [2].Because the exposure of carbide cutting tooth [3] is only than the low 0.7～1.2mm of the exposure of PDC composite sheet [2], so when in soft formation, creeping into, carbide cutting tooth [3] also wedging stratum participates in cutting, thereby the utility model has with the same effect of common PDC drill bit when boring soft formation.Because carbide cutting tooth [3] is very near apart from PDC composite sheet [2], 5～10mm is only arranged, thereby carbide cutting tooth [3] is equivalent to again support behind of PDC composite sheet [2], improved the shock resistance damage capability of PDC composite sheet [2], so when brill chance hard interbedded layer the utility model twisted vibration, PDC composite sheet [2] can be resisted shock loading effectively, avoids damaging, thereby guarantee the utility model operate as normal, drill hard interbedded layer smoothly.
Claims (2)
1. an oil and gas well drilling drill bit mainly is made up of bit body [1], PDC composite sheet [2], carbide cutting tooth [3] and nozzle [4], it is characterized in that each PDC composite sheet [2] back all arranges a carbide cutting tooth [3].
2. oil and gas well drilling drill bit according to claim 1, the exposure that it is characterized in that carbide cutting tooth [3] is than the low 0.7～1.2mm of the exposure of PDC composite sheet [2], and the distance between the two is 5～10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99244011 CN2402793Y (en) | 1999-09-01 | 1999-09-01 | Petroleum and natural gas drilling bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99244011 CN2402793Y (en) | 1999-09-01 | 1999-09-01 | Petroleum and natural gas drilling bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2402793Y true CN2402793Y (en) | 2000-10-25 |
Family
ID=34030191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99244011 Expired - Fee Related CN2402793Y (en) | 1999-09-01 | 1999-09-01 | Petroleum and natural gas drilling bit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2402793Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507820A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | PDC (polycrystalline diamond compact) bit applicable to gravel-containing formation |
| CN109441377A (en) * | 2018-10-30 | 2019-03-08 | 张家俊 | A kind of petroleum drilling device |
| CN110735603A (en) * | 2019-10-24 | 2020-01-31 | 中煤科工集团西安研究院有限公司 | Split type column piece composite drill bit for down-the-hole hammer |
-
1999
- 1999-09-01 CN CN 99244011 patent/CN2402793Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105507820A (en) * | 2014-09-27 | 2016-04-20 | 中国石油化工集团公司 | PDC (polycrystalline diamond compact) bit applicable to gravel-containing formation |
| CN109441377A (en) * | 2018-10-30 | 2019-03-08 | 张家俊 | A kind of petroleum drilling device |
| CN110735603A (en) * | 2019-10-24 | 2020-01-31 | 中煤科工集团西安研究院有限公司 | Split type column piece composite drill bit for down-the-hole hammer |
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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 |