CN2866788Y - Synneusis diamond composite insert drill bit with secondary grade tooth structure - Google Patents
Synneusis diamond composite insert drill bit with secondary grade tooth structure Download PDFInfo
- Publication number
- CN2866788Y CN2866788Y CN 200620033337 CN200620033337U CN2866788Y CN 2866788 Y CN2866788 Y CN 2866788Y CN 200620033337 CN200620033337 CN 200620033337 CN 200620033337 U CN200620033337 U CN 200620033337U CN 2866788 Y CN2866788 Y CN 2866788Y
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- CN
- China
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- bit
- tooth
- drill bit
- polycrystalline diamond
- diamond compact
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- Expired - Fee Related
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Abstract
The utility model provides a polycrystalline diamond compact bit with a double gear structure in order to solve the problem of short life duration and high drilling cost of the current compact bit. The utility model utilizes the project that the cutting teeth in the front row of the bit are two-gang polycrystalline diamond compact distributed longitudinally, wherein one gang is one-level gear and the other group is two-level gear, the one-level gear and the two-level gear are combined together into a continuous cutting structure. The adoption of two-level structure increases the total quantity of the compact, enhances cutter density of the bit, improves the cutting power of the bit in the damage state, extends the life duration of the bit, increases drilling depth, reduces frequency of tripping-out and running and reduces cost in the complex ground layer and the process of drilling.
Description
Technical field
The utility model belongs to the oil drilling tool field, is a kind of polycrystalline diamond compact bit with secondary toothing that is used for the not clear prospect pit drilling well in bad ground or stratum.
Background technology
The front-seat composite polycrystal-diamond of the current employed conventional polycrystalline diamond compact bit of oil drilling is arranged and is one pole cloth tooth (as shown in Figure 1), when bore meeting bad ground (as hard abrasive formation, broken formation, contain the interlayer of gravel etc.), the damage because of composite sheet often can't effectively further be crept into drill bit, bit life is shorter, drilling depth is less, can increase the number of elements that the number of times that makes a trip and drill bit use simultaneously, drilling cost is increased.The drilling contractor often wishes that to the well section that the stratum is not clear a drill bit can have more drilling depth when the prospect pit operation, to reduce exploration expenditure.
Summary of the invention
The utility model aim to provide a kind of can be when the bad ground drilling well, prolong the polycrystalline diamond compact bit with secondary toothing of drilling life of bit.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of polycrystalline diamond compact bit with secondary toothing, comprise drill bit, attached to the cutting teeth on the drill bit, it is characterized in that: the cutting teeth that is positioned at the drill bit front row is two groups of composite polycrystal-diamonds of vertically arranging, and wherein, one group of composite sheet is the one-level tooth for the main cutting tooth; Another group composite sheet is the secondary tooth for the reserve cutting teeth; One-level tooth and secondary tooth are combined and are formed continuous cutting structure.
Described secondary tooth is the crescent composite sheet of being made up of two sections circular arcs, and the combination of two sections circular arcs is adjusted as required.
Described secondary tooth can be arranged in the different parts of drill bit as required, can all arrange by each wing, also can only select the part wing to arrange.
The back rake angle of described secondary tooth can be identical with the back rake angle of the one-level tooth of its combination, also can be different.
Described secondary tooth and one-level tooth can select the composite sheet of different size to make up when combination as required.
Advantage of the present utility model is:
The I and II tooth has increased the total composite sheet quantity of drill bit, can prolong the application life of drill bit, is a kind of reserve cutting structure of innovation.
Two, the secondary tooth is when drill bit creeps into, and beginning does not participate in cutting, does not influence the initial aggressiveness of drill bit, and only just participation work after drill bit heavy wear has improved drill bit in the cutting power of decreasing under the attitude.
Three, the utility model drill bit can increase footage per bit, reduces the number of times that makes a trip, and can reduce cost in bad ground and prospect pit work, obtains economic benefit.
Description of drawings
Fig. 1 is conventional polycrystalline diamond compact bit structural representation.
Fig. 2 is the polycrystalline diamond compact bit structural representation with secondary toothing.
Fig. 3 is one-level tooth and secondary tooth combination schematic diagram.
Fig. 4 is a secondary tooth schematic diagram.
Fig. 5 is secondary tooth combination back rake angle schematic diagram.
The specific embodiment
The utility model provides the polycrystalline diamond compact bit of secondary toothing, for its cutting teeth, the cutting teeth at drill bit 1 front row is that two groups of composite polycrystal-diamonds are vertically arranged (as shown in Figure 2), wherein, one group of circular among figure composite sheet is main cutting teeth, is called one-level tooth 2; Meniscate one group of composite sheet is the reserve cutting teeth, is called secondary tooth 3; And the one-level tooth 2 of a circle and a meniscate secondary tooth 3 are combined, and form continuous cutting structure (as shown in Figure 3).
The theoretical foundation of secondary teeth drill bit: the secondary tooth is when drill bit creeps into, it is tooth in support, and beginning does not participate in cutting, does not influence the initial aggressiveness of drill bit, only just participation work after the heavy wear of one-level tooth has improved drill bit in the continuous cutting power of decreasing under the attitude.
The secondary tooth is the special cutting teeth of being made up of two sections circular arcs of crescent (as shown in Figure 4), wherein the size of arc section L1 by with the size decision of the one-level tooth of its combination, the combination of two sections circular arcs is adjusted as required.
Secondary tooth and one-level tooth can select the composite sheet of different size to make up when combination as required.
The secondary tooth can be arranged in the different parts (as nose, outer shoulder etc.) of drill bit as required, can all arrange by each wing, also can only select the part wing to arrange.
The back rake angle β (as shown in Figure 5) of secondary tooth can be identical with the back rake angle of the one-level tooth of its combination, also can be different.
Drill bit with secondary toothing need angle crown to drill bit according to lithology, cutting teeth be optimized design, to select can bring into play a kind of of secondary tooth effect.
Claims (6)
1, a kind of polycrystalline diamond compact bit with secondary toothing, comprise drill bit (1), attached to the cutting teeth on the drill bit (1), it is characterized in that: being positioned at the front-seat cutting teeth of drill bit (1) is two groups of composite polycrystal-diamonds of vertically arranging, wherein, one group of composite sheet is one-level tooth (2) for the main cutting tooth, and another group composite sheet is secondary tooth (3) for the reserve cutting teeth; One-level tooth and secondary tooth are combined and are formed continuous cutting structure.
2, the polycrystalline diamond compact bit with secondary toothing according to claim 1 is characterized in that: the crescent composite sheet of described secondary tooth (3) for being made up of two sections circular arcs.
3, the polycrystalline diamond compact bit with secondary toothing according to claim 1 and 2 is characterized in that: described secondary tooth (3) is arranged in the nose of drill bit, outer shoulder.
4, the polycrystalline diamond compact bit with secondary toothing according to claim 3 is characterized in that: described secondary tooth (3) is arranged on each wing of drill bit.
5, the polycrystalline diamond compact bit with secondary toothing according to claim 3 is characterized in that: described secondary tooth (3) is arranged on the bit part wing.
6, the polycrystalline diamond compact bit with secondary toothing according to claim 3 is characterized in that: the back rake angle of described secondary tooth (3) is identical with the back rake angle of the one-level tooth of its combination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033337 CN2866788Y (en) | 2006-03-07 | 2006-03-07 | Synneusis diamond composite insert drill bit with secondary grade tooth structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620033337 CN2866788Y (en) | 2006-03-07 | 2006-03-07 | Synneusis diamond composite insert drill bit with secondary grade tooth structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2866788Y true CN2866788Y (en) | 2007-02-07 |
Family
ID=37702492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620033337 Expired - Fee Related CN2866788Y (en) | 2006-03-07 | 2006-03-07 | Synneusis diamond composite insert drill bit with secondary grade tooth structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2866788Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364032A (en) * | 2011-11-02 | 2012-02-29 | 西南石油大学 | Fixed cutting-tooth drilling bit |
-
2006
- 2006-03-07 CN CN 200620033337 patent/CN2866788Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102364032A (en) * | 2011-11-02 | 2012-02-29 | 西南石油大学 | Fixed cutting-tooth drilling bit |
| CN102364032B (en) * | 2011-11-02 | 2014-03-26 | 西南石油大学 | Fixed cutting-tooth drilling 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: 20070207 |