Oil field perforating bullet body powder metallurgy material and perforating bullet body manufacturing method

Abstract

The invention relates to oil field perforating bullet projectile body powder metallurgy material and a method for manufacturing the perforating bullet projectile body, belonging to the field of petroleum extraction machinery. The metallurgy material is composed of ferrous powder, copper powder, nickel powder, graphite powder and rare earth powder which are of different weight compatibility, mechanical mixing of the raw materials is carried out, and the materials are pressed and moulded by blank mold and processed into a cogged ingot of the projectile body by sintering; then certain density gradient is formed at different parts of the projectile body by secondary divided extrusion; activated sintering is carried out; finally precision mould pressing is carried out to realize near net shape, thus obtaining the oil field perforating bullet projectile body. In the invention, formula is reasonable, manufacturing technique is simple, the cost is low, the operation performance is good and the operation is reliable.

Description

technical field [0001] The invention belongs to petroleum exploitation machinery, and mainly relates to perforating bullets used in petroleum exploitation. Background technique [0002] The traditional oilfield perforator body is made of No. 20 steel through multiple cold extrusion and mechanical processing methods. There are many technical problems such as unstable performance, high cost, poor debris, and easy well sticking. During the perforation operation, residual holes or even blind holes often occur, so that the oil yield of the oil well cannot meet the design requirements. In severe cases, the perforation operation must be carried out again, which increases the cost of oil recovery. In addition, due to the many production steps of the traditional processing technology, the production efficiency is low, and the material utilization is low, which makes the manufacturing cost of the projectile body relatively high. In addition, since No. 20 steel produces relatively lar...

AI Technical Summary

Problems solved by technology

[0002] The traditional oilfield perforator body is made of No. 20 steel through multiple cold extrusion and mechanical processing methods. There are many technical problems such as unstable performance, high cost, poor debris, and easy well sticking. During the perforation operation, residual holes or even blind holes are often produced, so that the oil yield of the oil well cannot meet the design requirements. In serious cases, the perforation operation must be repeated, which increases the cost of oil recovery

In addition, due to the many production steps of the traditional processing technology, the production efficiency is low, and the material utilization is low, making the manufacturing cost of the projectile body relatively high

In addition, due to the relatively large fragments produced by No. 20 steel after the explosion of the projectile, a large number of fragments accumulate together, which is prone to well jamming accidents, thereby increasing salvage operations, reducing production efficiency, and increasing oil production costs.

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