Powder metallurgy billet and cold extrusion forming process for perforating bullet body

Abstract

The invention relates to a perforating charge body powder metallurgy billet and a cold extrusion forming process method, and belongs to petroleum exploitation tools. The billet is formed through compatibility of iron powder, copper powder, nickel powder, graphite powder, molybdenum powder and a binder according to different weight ratios, mechanical mixing, pressing and sintering are performed on the raw materials to prepare a charge body billet, cold extrusion is adopted to carry out extrusion on the whole charge body billet to obtain a charge body with the final shape, and sintering and precise pressing shaping are performed to obtain the perforating charge body. According to the present invention, the low alloy content powder metallurgy formula and the cold extrusion technology are adopted to process the charge body, and the following characteristics are provided, wherein the characteristics are that the material formula is novel, scientific and reasonable property is provided, mechanical property of the charge body is good, a penetration depth value of the perforation is large, use is safe and reliable, the production process is simple, the cost is low, perforating operation efficiency is increased, and petroleum exploitation cost is reduced.

Description

technical field [0001] The invention belongs to oil exploitation tools, and mainly relates to an elastic body material of an underground perforating bullet used in oilfield exploitation and an elastic body forming processing method. Background technique [0002] Oilfield perforating charge is a downhole perforating tool used to improve oil recovery efficiency in oilfields. The projectile body is a key component of the perforating charge. Its main function is to enhance the lateral detonation wave impulse of the perforating charge, increase the kinetic energy of the metal jet, delay and reduce the interference of the sparse wave on the metal jet, and ensure the perforation depth. Practice has shown that the higher the strength of the projectile, the greater the penetration value of the perforating charge. Therefore, increasing the strength of the projectile is one of the effective ways to increase the penetration of the perforating charge. Traditional elastic body processing...

AI Technical Summary

Problems solved by technology

Due to the complex structure of the projectile body, high machining cost and low production efficiency, it cannot meet the actual production needs. Although the use of cold extrusion technology improves production efficiency and relatively reduces production costs, the choice of projectile material is greatly restricted. Currently only 20 # Steel is manufactured by cold extrusion, while 20 # The mechanical properties of the steel projectile are low, the perforation penetration is unstable, and the size of the fragments after the projectile explodes is large, which is prone to well jamming accidents and increases the cost of salvage operations

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