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Wide-top reinforced tooth

A technology of strengthening teeth and wide tops, which is applied in the field of teeth, can solve the problems of low strength, prone to broken teeth, broken teeth, etc., and achieve the effects of long service life, improved life of cutting teeth and drill bits, and easy cracking and shattering

Inactive Publication Date: 2016-10-26
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its strength is low, and it is prone to broken teeth and broken teeth during work.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] A wide-top reinforced tooth, including a tooth column 1 and a tooth crown 2, the tooth crown 2 is flat wedge-shaped, and the bevel angle α of the tooth crown 2 on both sides of the tooth width direction 1 and alpha 2 The range is 0°≤α 1 ≤10°, 0°≤α 2 ≤10°, and the tooth crown 2 is provided with reinforcing ribs 3 on at least one side in the tooth thickness direction (refer to figure 1 , figure 2 shown). Alternatively, the bevel angles of the tooth crown 2 on both sides of the tooth width direction are equal (ie α 1 = α 2 ). Preferably, the tooth crown 2 is provided with a reinforcing rib 3 symmetrically placed relative to the tooth crown 2 on both sides in the tooth thickness direction. Alternatively, the contour of the tooth tip in the tooth thickness direction is straight (refer to Figure 8 shown). As an option, the contour line of the tooth top of the tooth in the tooth width direction is a straight line or a circular arc (refer to Figure 9 shown) or wavy...

Embodiment 2

[0066] This embodiment is basically the same as Embodiment 1, the difference is: the bevel angle α of the crown 2 of the tooth on both sides in the tooth width direction 1 and alpha 2 The range is 0°≤α 1 ≤5°, 0°≤α 2 ≤5°. As an option, the bevel angles of the crown 2 of the tooth on both sides of the tooth width direction are equal and 0° (ie α 1 = α 2 =0°), refer to Figure 18 shown.

Embodiment 3

[0068] This embodiment is basically the same as Embodiment 1, and the difference is that the bevel angles of the crown 2 of the tooth on both sides of the tooth width direction are not equal (ie α 1 ≠α 2 ), where the oblique angle α 1 and alpha 2 The range is 0°≤α 1 ≤5°, 5°≤α 2 ≤10°.

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Abstract

The invention relates to a tooth for a cone-inlaid drill, a drill having a cone structure, or a rock-breaking tool having a cone structure in the oil drilling and geological drilling fields, so that the strength of the existing wide tooth can be enhanced effectively. According to a technical scheme, a wide-top reinforced tooth comprises a tooth post and a crown in a flat wedge shape; and ranges of oblique angles alpha 1 and alpha 2 of the crown at the two sides in a tooth width direction are as follows: alpha 1 is larger than or equal to 0 degree and is less than or equal to 10 degrees, and the alpha 2 is is larger than or equal to 0 degree and is less than or equal to 10 degrees. A reinforced rib is arranged at the crown in a tooth thickness direction. The tooth has characteristics of large tooth edge width, high strength, and high toughness; and the damage effect area of the downhole rock by the tooth can be increased and thus the rack-breaking efficiency of the drill is improved.

Description

technical field [0001] The invention relates to a tooth used for petroleum and geological drilling with a toothed roller drill bit or a drill bit with a roller cone structure or a rock-breaking tool. Background technique [0002] The structure of the drill bit teeth is one of the key factors affecting the drilling efficiency of the drill bit. In the prior art, the commonly used tooth profiles (or "tooth profiles") of the toothed cone bit and the bit with a cone structure include spoon-shaped teeth, wedge-shaped teeth, conical spherical teeth, spherical teeth, and the like. For different geological conditions, teeth of different tooth types (also called cutting teeth) should be used to improve the adaptability of the drill bit to the formation. [0003] In the prior art, the lower tooth column part of the tooth used for the toothed roller cone drill bit or the drill bit with the roller cone structure or the rock breaking tool is cylindrical, and the upper tooth crown part gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B10/16E21B10/52
CPCE21B10/16E21B10/52
Inventor 杨迎新杨燕陈炼高翔林敏包泽军
Owner SOUTHWEST PETROLEUM UNIV
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