Iron-based diamond-impregnated bit for drilling in hard slipping foundation

A diamond-impregnated and diamond-impregnated technology, which is applied in the field of iron-based diamond-impregnated drill bits, achieves less variables, reduces the probability of thermal damage, and is highly targeted

Inactive Publication Date: 2012-12-19
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the slipping phenomenon that occurs when the existing diamond bit drills into hard and weakly abrasive formations, and to provide an iron-based impregnated diamond bit for drilling into hard and slippery fo

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  • Iron-based diamond-impregnated bit for drilling in hard slipping foundation
  • Iron-based diamond-impregnated bit for drilling in hard slipping foundation

Examples

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example 1

[0021] Select the drill bit size according to the actual drilling design, select the matrix formula, drill bit structure and diamond parameters according to the lithology characteristics of the construction formation, and perform charging calculation, weighing, mixing, charging, steel body alignment, drying, hot pressing Sintering, heat preservation and cooling, later machining, inspection and delivery.

[0022] Now take the drill hole diameter of 76.5mm, formation rock hardness of 6000MPa, weak abrasiveness, and drillability of grade 10~11 granite as an example: iron base is used as the matrix formula, the formula hardness is HRC15±3, and the lip surface of the drill bit is Tine type, as described below.

[0023] 1. Iron-based carcass components (mass percentage): 70% iron powder; 12% zinc powder; 15% 663 bronze powder; 1% manganese powder; 325 mesh.

[0024] 2. Use JR5 type diamond particles, the particle size is 40~45 mesh and 46~50 mesh, and mix according to the mass rat...

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Abstract

The invention discloses an iron-based diamond-impregnated bit for drilling in a hard slipping foundation. An iron-based substrate mixed material provided by the invention is formed by sintering an iron-based matrix and a diamond; the diamond is impregnated in the iron-based matrix; the volume percentage of the content of the diamond is 45-75%, and the grain size is 35-45mu; the iron-based matrix comprises the following components in percentage by mass: 65-72% of iron powder, 10-14% of zinc powder, 14-18% of 663 bronze powder, 1% of manganese powder and 2% of nickel powder; according to the invention, the iron powder with the mass content of about 70% is used for replacing the common tungsten carbide powder, and therefore, the cost of the diamond-impregnated bit is greatly reduced, the sintering temperature is reduced, and the heat damage rate of the diamond is reduced; the iron-based matrix is few in component, less in variable and easy to control; and the iron-based diamond-impregnated bit has higher pertinence and mainly aims to the hard slipping foundations.

Description

technical field [0001] The invention relates to an iron-based impregnated diamond drill bit, in particular to an iron-based impregnated diamond drill bit for drilling hard and weakly abrasive formations. Background technique [0002] Hard and weakly abrasive rock formations, also known as "slip" formations, have the characteristics of high rock hardness, high strength, and weak abrasiveness. Diamond drill bits often slip when drilling in such rock formations, resulting in poor drilling efficiency. Low footage, or no footage at all, is a long-standing technical problem in the drilling industry. Conventional treatment methods for "slippery" formations include: (1) Artificial cutting of diamond bits: grinding, sandblasting, lip surface acid etching, sanding at the bottom of the hole and adding sand to the flushing fluid are all auxiliary means to wear the drill bit. Body to realize the diamond drill edge. (2) Soft matrix drill bit: When drilling into slippery formations, pe...

Claims

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Application Information

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IPC IPC(8): E21B10/46C22C38/16B22F3/14B22F1/00
Inventor 孙友宏马银龙高科刘宝昌王秋雯
Owner JILIN UNIV
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