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Bushing button bit and machining method thereof

A processing method and bushing technology, applied in drills, metal processing, metal processing equipment, etc., can solve problems such as aggravating the failure of the drill bit to drop teeth, improve the stress condition of the orifice, reduce the loss of teeth, and enhance the reliability of the fixed teeth. Effect

Inactive Publication Date: 2015-03-25
SOUTHWEST PETROLEUM UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These will aggravate the tooth loss of the drill bit

Method used

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  • Bushing button bit and machining method thereof
  • Bushing button bit and machining method thereof
  • Bushing button bit and machining method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present invention will be further described below in combination with specific embodiments and accompanying drawings.

[0034] Basic example like figure 1 , 2As shown, a bushing-mounted roller cone bit includes teeth 4 arranged on the roller cone 3, and the teeth 4 are embedded and fixed in the tooth holes 31 on the roller cone 3 through their tooth roots 41. The diameter of the tooth hole 31 is Smaller than the maximum diameter inside the tooth hole 31, the diameter of the matching part of the tooth 4 root 41 and the hole is smaller than the maximum diameter of the lower part of the tooth root 41, a bushing 5 is arranged between the tooth 4 and the tooth hole 31, and the tooth root 41 of the tooth 4 passes through the The interference fit is fixed in the bush 5, and the bush 5 is fixed in the tooth hole 31 through the interference fit.

[0035] As an option 1, the diameter of the opening of the tooth hole 31 is 0.1%-1% smaller than the maximum diameter inside the...

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PUM

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Abstract

The invention provides a bushing button bit and a machining method of the bushing button bit and relates to drill bits used in various drilling projects. The bushing button bit comprises teeth arranged on a bit body. The teeth are inlaid and fixed into tooth holes in the bit body through tooth roots. The bushing button bit is characterized in that the diameter of an orifice of each tooth hole is smaller than the maximum diameter in the tooth hole; the diameter of the part, matched with the orifice, of the tooth root of each tooth is smaller than the maximum diameter of the lower portion of the tooth root of the tooth; a bushing is arranged between each tooth and the corresponding tooth hole; the tooth roots of the teeth are inlaid and fixed into the corresponding bushings in an interference fit mode, and the bushings are inlaid and fixed into the corresponding tooth holes in an interference fit mode. Through the combining form of the teeth, the bushings and the tooth holes, falling teeth of the button bit can be reduced, and the service life of the button bit is obviously prolonged, so that the drilling footage and drilling efficiency of the button bit are improved, and the drilling cost is lowered.

Description

technical field [0001] The invention relates to drill bits used in various drilling projects, in particular to a toothed wheel drill bit used in oil and gas drilling projects. Background technique [0002] The roller cone bits used in drilling engineering can be divided into milling roller cone bits and insert roller cone bits according to the tooth shape and material. The teeth of the insert roller cone bits are generally made of cemented carbide. Because the wear resistance and strength of the cemented carbide teeth of the toothed roller cone bit are better than those of the milled toothed roller cone bit, it is widely used in drilling operations. The existing toothed gear bit is to press the tooth root of the cylindrical tooth into the cylindrical tooth hole on the gear shell, and the tooth root and the tooth hole are consolidated together by interference fit or welding , The stress generated by the interference fit of the fixed teeth through the interference deformation...

Claims

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Application Information

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IPC IPC(8): E21B10/08B23P19/02
CPCE21B10/08B23P19/021
Inventor 牛世伟郑华林杨迎新况雨春陈炼徐家年高清春陈思路曹生朱太辉刘虹利黄显德
Owner SOUTHWEST PETROLEUM UNIV