CN212454260U - Spiral grading type rock breaking drill bit - Google Patents
Spiral grading type rock breaking drill bit Download PDFInfo
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- CN212454260U CN212454260U CN202020647988.1U CN202020647988U CN212454260U CN 212454260 U CN212454260 U CN 212454260U CN 202020647988 U CN202020647988 U CN 202020647988U CN 212454260 U CN212454260 U CN 212454260U
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Abstract
The utility model discloses a broken rock drill bit of spiral hierarchical formula mainly comprises drill bit base member, the body of reducing, nozzle, wing and tapered cutting tooth, circular cutting tooth. The drill bit base body is provided with a diameter protection body, the conical cutting teeth are arranged outside the drill bit base body, the round cutting teeth are arranged at the lower end part of the drill bit base body, and the nozzle is arranged on the drill bit base body. During drilling operation, the spiral grading type rock breaking drill bit is arranged at the lower part of the drilling tool assembly, the drill rod or the underground power drilling tool drives the drill bit to rotate to break rock, the round cutting teeth firstly contact with rock at the bottom of a well and break the rock, and the outer diameter of the drill bit base body where the round cutting teeth are located is small, so that the rock breaking efficiency is high. The spiral grading type rock breaking drill bit firstly drills small holes in the rock and then drills large holes to break the rock step by step, finally drills a designed borehole, grading rock breaking is beneficial to releasing internal stress of the rock, breaking strength is reduced, and compared with a conventional method, spiral tooth arrangement can effectively reduce the stress state of a single cutting tooth and protect the cutting tooth from being damaged.
Description
Technical Field
The utility model relates to a drill bit, especially a rock drill bit is broken to spiral hierarchical formula of oil and gas well drilling, coal bed gas well drilling, geological exploration, mine probing field.
Background
In the construction of petroleum and natural gas drilling, coal bed gas drilling, geological exploration and mine drilling industries, a drill bit is used for crushing stratum rocks to drill a connecting channel, the channel is called a borehole, and the communication between the ground and underground resources is realized through the borehole, so that the underground resources are extracted out of the ground. Where the drill bit is a tool that directly breaks rock to form a borehole, the performance of the drill bit directly affects the drilling rate. As the drilling depth is continuously increased, the strength and the abrasiveness of underground rocks are increased, and higher requirements are put on a drill bit. The existing drill bit mainly comprises a drill bit base body, a diameter protection body, a nozzle, blades and cutting teeth, wherein the blades and the cutting teeth are distributed circumferentially, and the cutting teeth are mostly circular cutting teeth, so that the rock breaking efficiency of the drill bit is obviously reduced, the service life is shortened, the drilling speed is reduced, the drilling cost is increased, and the technical requirements on the site cannot be met.
The southwest area and the Xinjiang area of China are main locations of national energy strategies, underground resources have the characteristics of deep burial, compact and hard rock and high exploration and development difficulty, and rock mechanics analysis shows that the harder the rock is, the higher the cohesion is, the higher the crushing difficulty is, on one hand, the smaller the crushed rock amount is, namely, the smaller the drilled hole diameter is, the higher the drilling efficiency is and the lower the energy consumption is, on the other hand, the crushing efficiency of the hard rock can be obviously improved by releasing rock internal stress.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of prior art, provide a broken rock efficient, long service life, with low costs, safe and reliable, simple structure, maintain convenient spiral hierarchical formula simultaneously and break rock drill bit.
The utility model provides a technical scheme that its technical problem adopted is:
the spiral grading rock breaking drill bit mainly comprises a drill bit base body, a diameter protection body, a nozzle, a cutter wing and cutting teeth; wherein: the cutting teeth include conical cutting and round cutting teeth; the blades are distributed in a spiral grading and reducing manner along the space between the diameter-protecting body and the cutting end at the bottom of the drill bit; the circular cutting teeth are arranged at the cutting end of the drill bit, and the conical cutting is arranged between the diameter-keeping body and the cutting end in a downward grading manner along the periphery of the blade; the nozzles are arranged in a grading manner along the circumferential direction of the blades.
The above scheme further comprises:
the blades are multiple groups and are uniformly distributed on the drill bit base body.
A nozzle is also provided at the cutting end of the drill bit.
The nozzles are a plurality of and are evenly distributed on the blades of the drill bit base body.
The utility model discloses a
A spiral grading type rock breaking drill bit is characterized in that a diameter protection body is processed on a drill bit base body, conical cutting teeth are installed on the outer portion of the drill bit base body, round cutting teeth are installed at the lower end portion (namely a cutting end) of the drill bit base body, and a nozzle is installed on the drill bit base body. During drilling operation, the spiral grading rock breaking drill bit is arranged at the lower part of the drill tool assembly, the drill rod or the underground power drill tool drives the drill rod or the underground power drill tool to rotate to break rock, the circular cutting teeth firstly contact with rock at the bottom of a well and break the rock, the outer diameter of a drill bit base body where the circular cutting teeth are located is smaller, so that the rock breaking efficiency is very high, a pilot hole with a small diameter can be quickly formed at the bottom of the well, the conical cutting teeth on the drill bit base body start to gradually contact with the rock and break the rock along with continuous drilling of the drill bit, the outer diameter of the base body where the conical cutting teeth are located is gradually increased, so that the shape of a hole at the bottom of the well is a step shape, the conical cutting teeth rotate along with the drill bit, the rock on a step body is broken under the drilling pressure, due to the existence of the pilot hole, the internal rock stress is released, the rock, compared with the conventional drill, the spiral grading type rock breaking drill has higher rock breaking efficiency. The spiral grading type rock breaking drill bit is similar to a conventional drill bit in that blades for mounting cutting teeth are machined, the number of the blades is determined according to site working conditions, nozzles of the spiral grading type rock breaking drill bit are different from those of the conventional drill bit, the nozzles at the lower end of a drill bit base body mainly aim at circular cutting teeth, the nozzles at the upper portion of the blades of the drill bit base body mainly aim at conical cutting teeth, and special nozzles are mounted on each circle of conical cutting teeth. The field test shows that the spiral grading type rock breaking drill bit can completely meet the technical requirements of the field drilling process, the rock breaking efficiency is high, the mechanical drilling speed is obviously improved, the data statistics and analysis show that the average mechanical drilling speed is improved by 96.8-188.9% in the drilling process of deep wells and ultra-deep wells.
The utility model has the advantages that: the spiral grading type rock breaking drill bit adopts a grading rock breaking method, firstly drills a small hole diameter and then drills a large hole diameter, so that the internal stress of the rock can be effectively released, and the energy loss can be reduced. Meanwhile, the spiral grading type rock breaking drill bit has the characteristics of simple structural design, reliable performance, convenience in operation and low cost, and is convenient to popularize and use in a large range.
Drawings
Fig. 1 is a schematic structural view of a spiral grading rock breaking drill bit according to the present invention.
In the figure: 1. the drill bit comprises a drill bit base body, 2. a diameter-protecting body, 3. a nozzle, 4. a conical cutting tooth and 5. a round cutting tooth.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example 1
A spiral grading rock breaking drill bit mainly comprises a drill bit base body 1, a gauge body 2, a nozzle 3, a blade and cutting teeth; wherein: the cutting teeth comprise a conical cutting 4 and a circular cutting 5; the blades are spirally distributed in a three-stage reducing manner along the space between the gauge body 2 and the cutting end at the bottom of the drill bit; the circular cutting teeth 5 are arranged at the cutting end of the drill bit, and the conical cutting teeth 4 are downwards arranged between the diameter-keeping body 2 and the cutting end in three stages along the periphery of the blade; the nozzles 3 are arranged in stages along the circumferential direction of the blades.
Example 2
On the basis of the embodiment 1, the method further comprises the following steps:
the blades are three groups and are uniformly distributed on the drill bit base body 1. A nozzle 3 is also provided at the cutting end of the drill bit. Nine nozzles 3 are uniformly distributed on the blades of the drill bit base body 1 in a spiral shape.
Example 3
Referring to the attached figure 1 of the specification, the spiral grading type rock breaking drill bit mainly comprises a drill bit base body 1, a gauge body 2, a nozzle 3, a blade, a conical cutting tooth 4 and a circular cutting tooth 5. The diameter-protecting body 2 is processed on the drill bit base body, the conical cutting teeth 4 are arranged outside the drill bit base body 1, the round cutting teeth 5 are arranged at the lower end part (cutting end) of the drill bit base body 1, and the nozzle 3 is arranged on the drill bit base body 1. The conical cutting teeth 4 and the round cutting teeth 5 are arranged on blades of the drill bit base body 1, and the blades are three groups and are uniformly distributed on the drill bit base body 1. The conical cutting teeth 4 on the drill bit base body 1 are distributed spirally, the distribution outer diameter of the conical cutting teeth 4 is larger than that of the circular cutting teeth 5, the number of the nozzles 3 is ten, one group is arranged at the cutting end, and the rest are uniformly distributed on the drill bit base body 1.
During drilling operation, the spiral grading type rock breaking drill bit is arranged at the lower part of the drilling tool assembly, a drill rod or a downhole power drilling tool drives the drill rod or the downhole power drilling tool to rotate to break rock, the circular cutting teeth 5 firstly contact with and break rock at the bottom of a well, and the outer diameter of the part, where the circular cutting teeth 5 are located, of the drill bit base body 1 is small, so that the rock breaking efficiency is high, and a pilot hole with a small diameter can be formed at the bottom of the well quickly. As the drill bit continues to drill into rock, the conical cutters 4 on the bit body 1 begin to progressively contact the rock and break up, and the bottom hole is stepped in shape as the outer diameter of the body in which the conical cutters 4 are located progressively increases. The tapered cutting teeth 4 are along with the rotation of the drill bit, the rock on the step body is crushed under the drilling pressure, the internal stress of the rock is released due to the existence of the front pilot hole, the rock volume of the step body is small, the rock breaking amount is small, the required energy consumption is low, and the spiral grading type rock breaking drill bit is higher than the conventional drill bit in rock breaking efficiency on the premise of the same energy equipment.
The spiral grading type rock breaking drill bit is similar to a conventional drill bit in that blades used for installing cutting teeth are machined, the number of the blades is determined according to site working conditions, nozzles of the spiral grading type rock breaking drill bit are different from those of the conventional drill bit, the nozzles located at the lower end of a drill bit base body are mainly directed at round cutting teeth, the nozzles located at the upper portion of the drill bit base body are mainly directed at conical cutting teeth 4, and special nozzles are installed on each circle of conical cutting teeth.
Claims (4)
1. The spiral grading rock breaking drill bit mainly comprises a drill bit base body (1), a gauge body (2), a nozzle (3), a blade and cutting teeth; the method is characterized in that: the cutting teeth comprise a conical cutting (4) and a circular cutting tooth (5); the blades are distributed in a spiral grading and reducing manner along the space between the diameter-protecting body (2) and the cutting end at the bottom of the drill bit; the circular cutting teeth (5) are arranged at the cutting end of the drill bit, and the conical cutters (4) are arranged between the caliber body (2) and the cutting end in a grading manner downwards along the periphery of the blade; the nozzles (3) are arranged in a grading manner along the circumferential direction of the blades.
2. The helical staged rock drill bit of claim 1, wherein: the blades are multiple groups and are uniformly distributed on the drill bit base body (1).
3. The helical staged rock drill bit of claim 1 or 2, wherein: the cutting end of the drill bit is also provided with a nozzle (3).
4. The helical staged rock drill bit of claim 1 or 2, wherein: the nozzles (3) are uniformly distributed on the blades of the drill bit base body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020647988.1U CN212454260U (en) | 2020-04-26 | 2020-04-26 | Spiral grading type rock breaking drill bit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020647988.1U CN212454260U (en) | 2020-04-26 | 2020-04-26 | Spiral grading type rock breaking drill bit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212454260U true CN212454260U (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020647988.1U Active CN212454260U (en) | 2020-04-26 | 2020-04-26 | Spiral grading type rock breaking drill bit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113821894A (en) * | 2021-11-25 | 2021-12-21 | 西南石油大学 | Drill bit design method based on local variable-strength rock breaking principle |
-
2020
- 2020-04-26 CN CN202020647988.1U patent/CN212454260U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113821894A (en) * | 2021-11-25 | 2021-12-21 | 西南石油大学 | Drill bit design method based on local variable-strength rock breaking principle |
| CN113821894B (en) * | 2021-11-25 | 2022-01-21 | 西南石油大学 | Drill bit design method based on local variable-strength rock breaking principle |
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