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Preparing method of tungsten copper powder for perforating bullet type cover

A powder preparation, tungsten copper technology, applied in coating and other directions, can solve problems such as low production efficiency and increased production cost, and achieve the effects of avoiding pollution, improving friction, and reducing molding pressure

Active Publication Date: 2015-06-24
BC P INC CHINA NAT PETROLEUM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to address the defects and deficiencies in the above-mentioned prior art, and to provide a method for preparing tungsten-copper powder for perforating ammunition cover. That is to say, the segregation of different component powder particles is the result of the joint action of particle specific gravity and particle internal friction. By solving the segregation problem of the existing tungsten and copper powders in the process of mixing and spinning, on the basis of ensuring the perforation performance of the perforating bullet , to avoid the problems of increased production cost and low production efficiency caused by the degreasing and pre-burning process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: 1.5% (mass percent) copper coated with tungsten powder

[0023] Weigh 1.882Kg of copper acetate and put it into a ball mill, add 6Kg of cemented carbide balls and mill for 1.5 hours, then add 40Kg of tungsten powder and mix for 2 hours at a speed of 300 rpm. Subsequently, 400 mm of water was added to continue ball milling for 30 minutes. Put the powder mixture into a boat and slowly push it into a 450°C hydrogen reduction furnace to calcine and reduce the powder. After coming out of the furnace, put 40.6Kg of copper-coated tungsten powder and 9.4Kg of electrolytic copper powder into the ball mill, add 6Kg of hard alloy balls and 40 grams of engine oil. The speed of the ball mill is 300 rpm, and the powder is unloaded after mixing for 2 hours. The prepared tungsten-copper mixed powder is formed into a powder cover according to the normal spinning process, and assembled in the SDP39HMX25-2 perforating charge, with a penetration depth of 810mm.

Embodiment 2

[0024] Embodiment 2: Tungsten powder coating 1% (mass percentage) copper

[0025] Weigh 1.255Kg of copper acetate and put it into a ball mill, add 6Kg of cemented carbide balls and mill for 1 hour, then add 40Kg of tungsten powder and mix for 2 hours at a speed of 300 rpm. Subsequently, 400 mm of water was added to continue ball milling for 30 minutes. Put the powder mixture into a boat and slowly push it into a 450°C hydrogen reduction furnace to calcine and reduce the powder. After coming out of the furnace, put 40.4Kg of copper-coated tungsten powder and 9.6Kg of electrolytic copper powder into the ball mill, add 5Kg of hard alloy balls and 40 grams of engine oil. The engine oil is ordinary engine oil. The speed of the ball mill is 300 rpm, and the powder is unloaded after mixing for 2 hours. The prepared tungsten-copper mixed powder is formed into a powder cover according to the normal spinning process, and assembled in the SDP39HMX25-2 perforating bullet, with a penetr...

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PUM

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Abstract

The invention discloses a preparing method of tungsten copper powder for a perforating bullet type cover, and relates to the technical field of manufacturing of petroleum perforating devices. According to the preparation method, copper acetate is selected as copper salt for wrapping tungsten powder particles, after being mixed, the copper acetate and the tungsten powder particles are calcinated in a hydrogen environment and are reduced to obtain copper-coated tungsten powder, then, the copper-coated tungsten powder is mixed with electrolytic copper powder, and therefore the tungsten copper powder is obtained. Based on the surface features of tungsten copper powder particles and a powder particle segregation mechanism that powder particles with different components have the phenomenon of segregation under the joint function of particles proportions and particle internal friction force, the preparing method solves the problems of increase of production costs and the low production efficiency caused by a degreasing presintering process on the bases of solving the problem of segregation in the processes of mixing and rotary pressing of tungsten powder and copper powder and guaranteeing the perforating performance of perforating bullets.

Description

technical field [0001] The invention relates to the technical field of preparation of petroleum perforating equipment, in particular to a preparation method of tungsten copper powder for perforating ammunition cover. Background technique [0002] The perforating performance of perforating bullets directly affects the productivity of oil and gas wells. Improving the perforating depth of perforating bullets is the long-term goal pursued by the developers of perforating bullets. The drug-type cover material is the carrier of the energy-gathering effect, and its performance directly affects the quality of the jet. Therefore, the development of liner material technology is one of the key technologies of perforating bullets. Compared with the traditional dense powder cover, the powder cover has technical advantages such as high production efficiency, high processing precision and no pestle blockage after jet perforation. At the same time, the material composition design of the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/22
Inventor 罗宏伟郭鹏谢湛余讯涂良
Owner BC P INC CHINA NAT PETROLEUM CORP
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