Method for manufacturing polycrystal diamond drill used for geological prospecting

A technology of polycrystalline diamond and geological exploration, which is applied in the manufacture of tools, casting molding equipment, metal processing equipment, etc., can solve the problems of high cost, difficult processing, cumbersome manufacturing process, etc., and achieve excellent performance, fast drilling efficiency, The effect of increasing the impact value

Inactive Publication Date: 2008-03-26
上海融智金刚石钻头有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polycrystalline diamond (PDC for short) drill bits are mostly used for drilling in the prior art, and the drill bits generally use powder sintering processes such as alloy copper and tungsten carbide. Not only the manufacturing process is cumbersome, the processing is difficult, the cost is expensive, and the strength of the drill bit cannot be guaranteed

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The composition and weight percentage of the drill bit are: 40CrMnMo 85%, Cu 11.5%, Sn 3.5%.

Embodiment 2

[0017] The composition and weight percentage of the drill bit are: 40CrMnMo 81%, Cu 13.5%, Sn 5.5%.

[0018] The PDC bit manufactured by the method of the present invention uses highly wear-resistant and impact-resistant polycrystalline diamond composite (PDC) as cutting teeth, and scrapes the formation in a shearing manner during the drilling process with excellent chip removal and self-sharpening properties. , A higher ROP can be obtained with low drilling pressure and high rotational speed. The drill bit is suitable for mudstone, sandstone, oil shale.

[0019] The structural characteristics of the PDC drill bit that the inventive method makes are as follows:

[0020] 1. Use highly wear-resistant and impact-resistant mirror-polished PDC chips as the cutting teeth of the drill bit, which reduces the friction and vibration impact of cutting rocks, and the reasonable cutting angle and side inclination angle improve the cutting performance;

[0021] 2. The drill bit body is fo...

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PUM

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Abstract

The present invention relates to a manufacture method of polycrystalline diamond bit for geological prospecting. Said invention adopts a casting-forming process, and includes the following steps: using graphite as raw material to make bit master pattern, firstly using wax material and making the wax material into bit pattern, covering said bit pattern with several layers of fireproof coating material, then using graphite to make pattern shell, melting said pattern to obtain bit hollow pattern, melting the bit mixture, pouring to obtain bit casting and making the bit casting undergo the processes of surface quenching and thermal refining treatment so as to obtain the invented finished product. It is characterized by that the described bit mixture composition includes (by wt%) 80%-85% of 40CrMnMo alloy steel, 10%-14% of Cu and 3.5%-5.5% of Sn.

Description

technical field [0001] The invention relates to a manufacturing technology of a drill bit, in particular discloses a manufacturing method of a polycrystalline diamond drill bit for geological exploration. Background technique [0002] Polycrystalline diamond (PDC for short) drill bits are mostly used for drilling in the prior art, and the drill bits generally use powder sintering processes such as alloy copper and tungsten carbide. Not only the manufacturing process is cumbersome, the processing is difficult, the cost is expensive, and the strength of the drill bit cannot be guaranteed . Contents of the invention [0003] The purpose of the present invention is to change the traditional powder sintering process of PDC manufacturing in the prior art, and adopt the casting process to manufacture polycrystalline diamond drill bits. [0004] The present invention is achieved in the following way: a method for manufacturing a polycrystalline diamond drill bit for geological ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04C22C38/38B23P5/00
Inventor 张明利王兴民于振忠张全涛曹智钦张会平
Owner 上海融智金刚石钻头有限公司
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