Ground source heat pump well drilling wear-resistance bit and manufacturing method thereof

A ground source heat pump and drill bit technology, which is used in drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of high damage frequency, difficult to repair, and hard objects are fragile, and achieve long service life, not easy to fall off, and not easy to crack. Effect

Inactive Publication Date: 2009-12-09
祖国全
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the drill bits used at home and abroad are basically roller cone bits or composite drill bits for geological drilling. This type of drill bit is composed of a steel blank and a wear-resistant layer on the working face. The wear-resistant layer on the working face is generally welded by silver welding. Diamond is welded to the steel blank. This kind of drill bit has better performance and longer service life when used in stable formation properties; but its disadvantage is that it is fragile when encountering hard objects, and it is not easy to repair, and the cost is high.
The dr...

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  • Ground source heat pump well drilling wear-resistance bit and manufacturing method thereof
  • Ground source heat pump well drilling wear-resistance bit and manufacturing method thereof

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Embodiment 1

[0013] The specific implementation steps of the present invention for preparing the ground source heat pump drilling wear-resistant drill bit are as follows:

[0014] A. Clean, degrease and decontaminate the surface of the steel rough drill bit to be processed;

[0015] B. Preparation of slurry and coating: Take 200g of tungsten carbide powder and nickel-based alloy powder according to the weight ratio of 3:10-60 and mix them evenly, add 6-20g of turpentine containing 1-10g of rosin as a binder , after stirring evenly, a slurry is formed, and the slurry is coated on the clean surface to be processed on the pretreated steel blank of the drill bit, and the thickness of the coating layer is adjusted to 1.3-6.5mm; The drill bits coated with slurry are placed in an oven, baked at 80-160°C for 1-3 hours, and can be precisely shaped according to specific needs after being out of the oven;

[0016] C. Carry out vacuum sintering on the above-mentioned drill bit after drying and shapin...

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PUM

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Abstract

The invention discloses a ground source heat pump well drilling wear-resistance bit and a manufacturing method thereof. The manufacturing method is characterized by comprising the following steps: uniformly mixing tungsten carbide powder and nickel base alloy powder according to a weight ratio of 3:10-60, adding rosin-containing turpentine oil serving as a bonding agent into the mixture in an amount of 3 to 10 percent of the weight of the powder to make slurry through stirring, and coating the slurry on a damageable working face of a steel blank of the bit to form a 1.3 to 6.5 millimeter coating; and drying the bit in an oven at a temperature of between 80 and 160 DEG C for 1 to 3 hours, heating the bit at a vacuum of 10 to 30 Pa to 1,080 to 1,180 DEG C for vacuum melting, keeping the temperature for 30 to 55 minutes, furnace cooling the bit to 260 DEG C, and tapping air cooling the bit to obtain ground source heat pump well drilling wear-resistance bit of which the working face of the steel blank is melt with 1 to 5 millimeter nickel-base carbon tungsten alloy. The bit has the advantages of a damageable working face hardness of HRC58-71, excellent plasticity, low manufacturing cost, service life which is 3 to 5 times that of the prior roller bit and easy damaged working face repair.

Description

technical field [0001] The invention belongs to the technical field of drill bits, and in particular relates to a wear-resistant drill bit suitable for ground source heat pump drilling and a vacuum welding technology for obtaining a nickel-based tungsten carbide alloy wear-resistant layer on the surface of a steel base. Background technique [0002] Ground source heat pump technology is a new type of energy-saving technology that uses underground shallow renewable energy as a low-temperature heat source to cool or heat buildings. About 1 / 3 of the projects are drilling projects, and the loss of drill bits accounts for about 15% of the cost of drilling projects. Therefore, improving the service life of the drill bit and reducing the manufacturing cost of the drill bit are an important part of popularizing and using this energy-saving technology. At present, the drill bits used at home and abroad are basically roller cone bits or composite drill bits for geological drilling. Th...

Claims

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Application Information

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IPC IPC(8): E21B10/46C23C24/10
Inventor 祖国全何高清祖晅
Owner 祖国全
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