CN210659946U - PDC drill bit capable of rapidly drilling plastic stratum - Google Patents
PDC drill bit capable of rapidly drilling plastic stratum Download PDFInfo
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- CN210659946U CN210659946U CN201921021039.6U CN201921021039U CN210659946U CN 210659946 U CN210659946 U CN 210659946U CN 201921021039 U CN201921021039 U CN 201921021039U CN 210659946 U CN210659946 U CN 210659946U
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Abstract
The utility model discloses a PDC drill bit for fast drilling in plastic stratum, which comprises a drill bit body, wherein a plurality of blades are distributed on the drill bit body and are distributed at intervals around the circumference of the central axis of the drill bit body; the blades extend downwards from the top end surface of the drill bit body to the side surface of the drill bit body; a plurality of first cutting teeth and a plurality of second cutting teeth are distributed on the blade; the first cutting teeth and the second cutting teeth are sequentially distributed at intervals from the top end to the bottom in the extending direction of the blade; the first cutting teeth and the second cutting teeth are protruded out of the surface of the blade; the height of the first cutting tooth protruding out of the surface of the blade is higher than the height of the second cutting tooth protruding out of the surface of the blade. The utility model discloses a creep into the PDC drill bit fast to plastic stratum, the first cutting teeth that exceeds the blade surface contact the stratum earlier, abolishes the stratum confining pressure, and the second cutting teeth tracking cutting on low blade surface reaches the purpose that improves broken rock efficiency.
Description
Technical Field
The utility model relates to a drill bit technical field especially relates to a creep into PDC drill bit fast to plastic stratum.
Background
At present, in oil drilling, a drill bit is generally adopted for drilling, and with the increase of the drilling depth, the stratum bears larger pressure of a liquid column, and the stratum lithology also presents a plastic state. The existing upper blade of the drill bit is mainly made of a diamond compact, but the diamond compact is difficult to effectively bite into the stratum, especially the stratum of a long age.
SUMMERY OF THE UTILITY MODEL
In order to overcome the not enough of prior art, the utility model aims to provide a creep into PDC drill bit fast to plastic stratum, the first cutting teeth that exceeds the wing surface contact the stratum earlier, breaks the stratum confining pressure, and the second cutting teeth trace cutting on the low wing surface that goes out reaches the purpose that improves broken rock efficiency.
The purpose of the utility model is realized by adopting the following technical scheme:
a PDC drill bit for quickly drilling plastic strata comprises a drill bit body, wherein a plurality of blades are distributed on the drill bit body and are circumferentially distributed around the central axis of the drill bit body at intervals; the blades extend downwards from the top end surface of the drill bit body to the side surface of the drill bit body; a plurality of first cutting teeth and a plurality of second cutting teeth are distributed on the blade; the first cutting teeth and the second cutting teeth are sequentially distributed at intervals from the top end to the bottom in the extending direction of the blade; the first cutting teeth and the second cutting teeth are protruded out of the surface of the blade; the height of the first cutting tooth protruding out of the surface of the blade is higher than the height of the second cutting tooth protruding out of the surface of the blade.
Preferably, the blade includes a cutting tooth distribution surface and two side surfaces distributed on two sides of the cutting tooth distribution surface; the cutting teeth are distributed on the cloth surface and the side surfaces extend along the extending direction of the blade; the two side surfaces and the distribution surface of the cutting teeth form an included angle; the first cutting teeth and the second cutting teeth are distributed on the cutting tooth cloth distribution surface.
Preferably, the side surfaces of the two adjacent blades are arranged at intervals and enclose a chip groove; the side surface extends from the top end surface of the drill bit body to the side surface of the drill bit body in a corrugated shape.
Preferably, a nozzle is arranged in the chip groove.
Preferably, a protruding part is arranged at the center of the top end of the drill bit body; the protruding part is made of wear-resistant materials.
Preferably, the plurality of blades comprise a plurality of first blades and a plurality of second blades, and the plurality of first blades and the plurality of second blades are circumferentially distributed at intervals around the central axis of the drill bit body; the length of the first plurality of blades is greater than the length of the second plurality of blades.
Compared with the prior art, the beneficial effects of the utility model reside in that: a plurality of first cutting teeth and a plurality of second cutting teeth are sequentially distributed in the extending direction of each blade, the height of the first cutting teeth protruding out of the surface of each blade is higher than the height of the second cutting teeth protruding out of the surface of each blade, the first cutting teeth higher than the surface of each blade contact the stratum first, the confining pressure of the stratum is broken, the second cutting teeth lower than the surface of each blade perform tracking cutting, and the purpose of improving the rock breaking efficiency is achieved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of another view structure of the present invention.
In the figure: 10. a drill bit body; 11. a chip groove; 12. a nozzle; 20. a blade; 21. a first cutting tooth; 22. a second cutting tooth; 23. a side surface; 24. the cutting teeth are distributed on the cloth surface.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments:
the PDC drill bit for rapidly drilling the plastic stratum as shown in fig. 1 and fig. 2 comprises a drill bit body 10, wherein a plurality of blades 20 are distributed on the drill bit body 10, the plurality of blades 20 are circumferentially distributed around the central axis of the drill bit body 10 at intervals, and the blades 20 extend from the top end surface of the drill bit body 10 to the side surface 23 of the drill bit body 10. Specifically, a plurality of first cutting teeth 21 and a plurality of second cutting teeth 22 are distributed on the blade 20, and the plurality of first cutting teeth 21 and the plurality of second cutting teeth 22 are sequentially distributed at intervals from the top end to the bottom in the extending direction of the blade 20. In addition, the first cutting tooth 21 and the second cutting tooth 22 are protruded from the surface of the blade 20; the first cutting tooth 21 protrudes from the surface of the blade 20 to a higher level than the second cutting tooth 22 protrudes from the surface of the blade 20.
On the basis of the structure, use the utility model discloses a when creeping into PDC drill bit fast to plastic stratum, because it has a plurality of first cutting teeth 21 and a plurality of second cutting teeth 22 to distribute in proper order on the extending direction of its each wing 20, first cutting teeth 21 protrusion is higher than the height of second cutting teeth 22 protrusion in wing 20 surface in the height on wing 20 surface, when drill bit body 10 eats into the stratum, it is located the first cutting teeth 21 that exceeds wing 20 surface on drill bit body 10 top and can contacts the stratum earlier, after abolishing the stratum confining pressure, drill bit body 10 is deep, the second cutting teeth 22 that is low on wing 20 surface this moment can follow the trail of cutting, steadily advance, reach the purpose that improves broken rock efficiency.
In addition, because the first cutting teeth 21 with higher convex parts are all distributed at the top end of the drill bit body 10, the cutting force can be concentrated to the position of the top point of the blade 20, and the single-point rock breaking capacity is improved.
Preferably, the blade 20 includes a cutting tooth distribution surface 24 and two side surfaces 23, the two side surfaces 23 are distributed on two sides of the cutting tooth distribution surface 24, and the cutting tooth distribution surface 24 and the side surfaces 23 extend along the extending direction of the blade 20; the two side surfaces 23 and the cutting tooth distribution surface 24 are arranged at included angles, and the first cutting teeth 21 and the second cutting teeth 22 are distributed on the cutting tooth distribution surface 24. Therefore, the blade 20 comprises a plurality of surfaces, impact force from the stratum can be effectively decomposed, the impact resistance of the blade 20 is greatly improved, and the service life of the drill bit is prolonged.
Preferably, the side surfaces 23 of two adjacent blades 20 are spaced and surround the junk slots 11, and the side surfaces 23 extend from the top end surface of the drill bit body 10 to the side surfaces 23 of the drill bit body 10 in a corrugated shape, so that rock debris can be removed along the corrugated shape of the junk slots 11 when the drill bit body 10 drills into a rock stratum, so that the rock debris around the blades 20 can be rapidly moved, and mud pockets are prevented from being generated.
Further, a nozzle 12 is arranged in the chip groove 11, and when the drill bit is used, the nozzle 12 can introduce water flow to wash rock debris in the chip groove 11 to help the rock debris to be discharged.
Preferably, a protrusion made of a wear-resistant material may be further provided at the center of the top end of the bit body 10, so that the protrusion of the bit body 10 may form a hard fulcrum, thereby increasing wear resistance.
Preferably, the plurality of blades 20 includes a plurality of first blades and a plurality of second blades, each of which is circumferentially spaced around the central axis of the bit body 10; the length of the first blades is greater than that of the second blades, so that the first blades with longer length can cut at high speed during drilling operation, and the second blades with shorter length can also take into account the capability of drilling hard interlayers.
Various other modifications and changes may be made by those skilled in the art based on the above-described technical solutions and concepts, and all such modifications and changes are intended to fall within the scope of the claims.
Claims (6)
1. A PDC drill bit for quickly drilling plastic strata comprises a drill bit body, wherein a plurality of blades are distributed on the drill bit body and are circumferentially distributed around the central axis of the drill bit body at intervals; the drill bit is characterized in that the blades extend downwards from the top end surface of the drill bit body to the side surface of the drill bit body; a plurality of first cutting teeth and a plurality of second cutting teeth are distributed on the blade; the first cutting teeth and the second cutting teeth are sequentially distributed at intervals from the top end to the bottom in the extending direction of the blade; the first cutting teeth and the second cutting teeth are protruded out of the surface of the blade; the height of the first cutting tooth protruding out of the surface of the blade is higher than the height of the second cutting tooth protruding out of the surface of the blade.
2. The PDC bit for rapid drilling of plastic formations according to claim 1 wherein the blades comprise a cutter distribution face and two side faces distributed on either side of the cutter distribution face; the cutting teeth are distributed on the cloth surface and the side surfaces extend along the extending direction of the blade; the two side surfaces and the distribution surface of the cutting teeth form an included angle; the first cutting teeth and the second cutting teeth are distributed on the cutting tooth cloth distribution surface.
3. The PDC bit for rapidly drilling into a plastic formation according to claim 2, wherein the side surfaces of two adjacent blades are spaced apart and enclose a chip discharge groove; the side surface extends from the top end surface of the drill bit body to the side surface of the drill bit body in a corrugated shape.
4. The PDC bit for rapid drilling of plastic formations according to claim 3 wherein a nozzle is provided in the junk slots.
5. The PDC bit for rapid drilling of a plastic formation according to any one of claims 1-4, wherein the bit body is provided with a projection at a tip center; the protruding part is made of wear-resistant materials.
6. The PDC bit for rapid drilling of a plastic formation of any one of claims 1-4, wherein the plurality of blades includes a first plurality of blades and a second plurality of blades, each of the first plurality of blades and the second plurality of blades circumferentially spaced about a central axis of the bit body; the length of the first plurality of blades is greater than the length of the second plurality of blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921021039.6U CN210659946U (en) | 2019-07-02 | 2019-07-02 | PDC drill bit capable of rapidly drilling plastic stratum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921021039.6U CN210659946U (en) | 2019-07-02 | 2019-07-02 | PDC drill bit capable of rapidly drilling plastic stratum |
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| Publication Number | Publication Date |
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| CN210659946U true CN210659946U (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921021039.6U Active CN210659946U (en) | 2019-07-02 | 2019-07-02 | PDC drill bit capable of rapidly drilling plastic stratum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
-
2019
- 2019-07-02 CN CN201921021039.6U patent/CN210659946U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113027372A (en) * | 2020-11-12 | 2021-06-25 | 北京博德世达石油技术股份有限公司 | Novel wear-resisting high-efficient junk mill |
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