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PDC bit and cutting tooth thereof

A technology for cutting teeth and drill bits, which is applied in the direction of drill bits, drilling equipment, earthwork drilling and mining, etc. It can solve the problems of heat and burning of the diamond polycrystalline layer, reduce the life of the drill bit, and reduce the strength of rock breaking, so as to achieve good sharpness and improve The effect of rock breaking strength and service life

Inactive Publication Date: 2019-05-17
莱州市金野金刚石制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The PDC bit with this structure has contributed to the oil drilling engineering, but it also has the following shortcomings or deficiencies: ① When drilling through the hard formation, the diamond polycrystalline layer burns rapidly, resulting in collapsed wear, Finally, the life of the drill bit is reduced; ②Because the impact force of the rotating cylindrical tooth is small, when designing the PDC bit, it is usually adopted to increase the inclination angle of the cutting tooth on the design normal line to reduce the impact force of the tooth, but this method At the same time, it brings the defect that the rock-breaking strength decreases

Method used

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  • PDC bit and cutting tooth thereof
  • PDC bit and cutting tooth thereof
  • PDC bit and cutting tooth thereof

Examples

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Embodiment Construction

[0038] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

[0039] figure 1 It is a front view of a cutting tooth according to an exemplary embodiment. figure 2 yes figure 1 Front view of the cutter body of the cutter in . image 3 yes figure 1 A longitudinal section view of the base in .

[0040] Figure 4 yes figure 1 A top view of the base in . Figure 5 yes figure 1 A top view of the cutter in .

[0041] refer to Figure 1 to Figure 5 According to one aspect of the pre...

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Abstract

The invention discloses a PDC bit and a cutting tooth thereof. The cutting tooth comprises a cutting tooth body, and has a center line; a plurality of protrusion parts are arranged in the circumferential direction of the top of the cutting tooth body; a projection of the cutting tooth body in a direction perpendicular to the center line covers projections of the protrusion parts in the direction perpendicular to the center line; the top surfaces of the protrusion parts protrude from the top surface of the cutting tooth body. In a use process, the protrusion parts are relatively high in sharpness, so as to enter a rock layer more easily for rock breaking. Further, the cutting tooth body located behind the protrusion parts has a better function of buffering the cutting impact force, so thatrotatable friction force is easier to generate in a cutting process, and then the rock breaking intensity and the service life of the cutting tooth can be improved and prolonged.

Description

technical field [0001] The invention relates to an oil drilling technology, in particular to a cutting tooth. The invention also relates to a PDC drill bit. Background technique [0002] In the traditional PDC drill bit used for oil drilling, the diamond composite sheet used is generally a rotating cylindrical tooth, and its surface is a flat tooth surface. The PDC bit with this structure has contributed to the oil drilling engineering, but it also has the following shortcomings or deficiencies: ① When drilling through the hard formation, the diamond polycrystalline layer burns rapidly, resulting in collapsed wear, Finally, the life of the drill bit is reduced; ②Because the impact force of the rotating cylindrical tooth is small, when designing the PDC bit, it is usually adopted to increase the inclination angle of the cutting tooth on the design normal line to reduce the impact force of the tooth, but this method At the same time, it brings the defect that the rock-breaki...

Claims

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Application Information

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IPC IPC(8): E21B10/43E21B10/60
Inventor 王克行邱治国
Owner 莱州市金野金刚石制品有限公司
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