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Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit

A technology of diamond drill bits and cutting teeth, which is applied to drill bits, earth-moving drilling, drilling equipment, etc., can solve the problems of no footage of drill bits, cutting surface damage, diamond composite sheet damage, etc. Efficiency, improving tooth impact resistance, improving the effect of impact resistance

Inactive Publication Date: 2017-05-24
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When drilling into strata with high gravel content or hard formations, the high stress generated will exceed the strength of the diamond composite sheet, causing damage to the diamond composite sheet, resulting in damage to the cutting surface, and eventually leading to problems such as a decrease in ROP and no footage of the drill bit.
In addition, due to the poor impact resistance of the drill bit, the drilling speed of the drill bit decreases and the drill bit is replaced after tripping will bring high economic costs, and the daily cost during the drilling process is very high

Method used

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  • Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit
  • Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit
  • Non-planar cutting tooth for improving rock breaking efficiency and diamond drill bit

Examples

Experimental program
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Effect test

Embodiment approach 1

[0033] See figure 1 and figure 2 , which shows the three-dimensional structure and front view structure of the roof-shaped non-planar cutting tooth according to a specific embodiment of the present invention. As shown in the figure, the present invention provides a roof-shaped non-planar cutting tooth, which includes a cylindrical body 1, the end surface of the cylindrical body 1 is provided with a cutting ridge 11 that traverses the center line of the surface, and the cutting ridge 11 is the The highest point of the end surface of the cylindrical body 1, the two ends of the cutting ridge 11 extend to the outer edge 13 of the end surface of the cylindrical body 1, forming two cutting points 131, the ends of the cylindrical body on both sides of the cutting ridge 11 The top surface is a cutting bevel 14, and the height of the cutting bevel 14 gradually decreases from the cutting ridge 11 to the outer edge 13 of the end surface of the cylindrical body 1.

[0034] Specifically...

Embodiment approach 2

[0047] Figure 4 It is a schematic cross-sectional view of a diamond drill bit with roof-shaped non-planar cutting teeth of the present invention.

[0048] Figure 5 It is a three-dimensional view of a tooth arrangement embodiment of a diamond drill bit with roof type non-planar cutting teeth of the present invention

[0049] Such as Figure 4 As shown, the present invention also provides a diamond drill bit, which includes a drill bit body 3 and a plurality of blades 4, wherein: the drill bit body 3 is provided with an axially penetrating water channel 31, and one end of the drill bit body 3 is formed with a connection part 32, the other end of the drill bit body 3 is provided with a plurality of water holes 33, and a plurality of the water holes 33 communicate with the water channel 31; At the other end, a plurality of cutting teeth 5 are arranged side by side on one side of the blade 4 , and the plurality of cutting teeth 5 include the roof-shaped non-planar cutting teet...

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Abstract

The invention provides a ridge-shaped non-planar cutting tooth and a diamond drill bit. The ridge-shaped non-planar cutting tooth comprises a cylindrical body, wherein a cutting ridge which transversely penetrates through the surface center line is arranged on the surface of an end of the cylindrical body; the cutting ridge is located at the highest point of the surface of an end of the cylindrical body; two ends of the cutting ridge extend to the outer edge of the surface of the end of the cylindrical body; the surface of the end of the cylindrical body is divided into two cutting inclined planes which are respectively positioned on two sides of the cutting ridge by the cutting ridge; and the heights of the cutting inclined planes are linearly decreased progressively from the cutting ridge to the outer edge of the surface of the end of the cylindrical body. The ridge-shaped non-planar cutting tooth and the diamond drill bit have high impact resistance, and are used for a stratum with high impact. The ridge-shaped non-planar cutting tooth is mounted on the drill bit, the drilling efficiency of the drill bit can be improved, and the service life of the drill bit can be prolonged.

Description

technical field [0001] The present invention relates to a cutting tooth and a drill bit, in particular to a roof-shaped non-planar cutting tooth and a diamond drill bit used in the technical field of oil exploration drilling bits. Background technique [0002] At present, diamond drill bits are widely used in oil exploration drilling. This type of drill bit is usually composed of a drill body part that is sintered with tungsten carbide material or processed with a metal material as the base material, and a diamond composite cutting tooth that is brazed at the front end of the cutting surface of the drill blade blade. During the drilling process, the diamond composite sheet interacts with the rock, generating stress around the contact interface between the diamond composite sheet and the rock, and breaking the rock when the stress exceeds the strength of the rock. When drilling into high gravel content inclusion formations or hard formations, the high stress generated will e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/54
CPCE21B10/54
Inventor 程晓敏陈德民白登相杨雄文王永红刘宇
Owner BC P INC CHINA NAT PETROLEUM CORP