Powder composite materials for plugless facing of perforator shaped charges

Abstract

Shaped changes are used for driving perforation channels in casing and rock though which oil enters a well. Important characteristics governing the quality of exposing an oil stratum are the depth of the perforation channel and its free volume. Currently shaped charges are mainly supplied with formed copper facings. Use of these facings, depending on charge construction, is accompanied in 20–60% of cases by formation of a plug and blocking of the channel which markedly reduces its transmitting capacity. In view of this avoidance of plug formation alongside providing a high penetration capacity for shaped charges is an important task. Use of powder materials as plugless facings has recently caused particular interest. However, information about them is contradictory and inadequate. In addition, the possibility of total avoidance of a plug, use of waste-free technology for preparing facings, and also creation in contrast to compact materials of very varied composites has made powder materials very promising for developing the shaped charges of perforators. In this work a study is made of the effect of powder characteristics and compact copper facings on the working parameters of shaped charges ZPK 95N.