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Title: Energy transfer through a multi-layer liner for shaped charges

Abstract

This invention relates to the determination of parameters for selecting materials for use as liners in shaped charges to transfer the greatest amount of energy to the explosive jet. Multi-layer liners constructed of metal in shaped charges for oil well perforators or other applications are selected in accordance with the invention to maximize the penetrating effect of the explosive jet by reference to four parameters: (1) Adjusting the explosive charge to liner mass ratio to achieve a balance between the amount of explosive used in a shaped charge and the areal density of the liner material; (2) Adjusting the ductility of each layer of a multi-layer liner to enhance the formation of a longer energy jet; (3) Buffering the intermediate layers of a multi-layer liner by varying the properties of each layer, e.g., composition, thickness, ductility, acoustic impedance and areal density, to protect the final inside layer of high density material from shattering upon impact of the explosive force and, instead, flow smoothly into a jet; and (4) Adjusting the impedance of the layers in a liner to enhance the transmission and reduce the reflection of explosive energy across the interface between layers.

Inventors:
 [1];  [1]
  1. (Albuquerque, NM)
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
OSTI Identifier:
865328
Patent Number(s):
4498367
Assignee:
Southwest Energy Group, Ltd. (Albuquerque, NM) SNL
DOE Contract Number:  
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
energy; transfer; multi-layer; liner; shaped; charges; relates; determination; parameters; selecting; materials; liners; amount; explosive; jet; constructed; metal; oil; perforators; applications; selected; accordance; maximize; penetrating; effect; reference; adjusting; charge; mass; ratio; achieve; balance; areal; density; material; ductility; layer; enhance; formation; buffering; intermediate; layers; varying; properties; composition; thickness; acoustic; impedance; protect; final; inside; shattering; impact; force; flow; smoothly; transmission; reduce; reflection; interface; intermediate layers; acoustic impedance; energy transfer; intermediate layer; explosive charge; shaped charge; shaped charges; areal density; explosive energy; explosive force; liner material; /86/29/102/

Citation Formats

Skolnick, Saul, and Goodman, Albert. Energy transfer through a multi-layer liner for shaped charges. United States: N. p., 1985. Web.
Skolnick, Saul, & Goodman, Albert. Energy transfer through a multi-layer liner for shaped charges. United States.
Skolnick, Saul, and Goodman, Albert. Tue . "Energy transfer through a multi-layer liner for shaped charges". United States. https://www.osti.gov/servlets/purl/865328.
@article{osti_865328,
title = {Energy transfer through a multi-layer liner for shaped charges},
author = {Skolnick, Saul and Goodman, Albert},
abstractNote = {This invention relates to the determination of parameters for selecting materials for use as liners in shaped charges to transfer the greatest amount of energy to the explosive jet. Multi-layer liners constructed of metal in shaped charges for oil well perforators or other applications are selected in accordance with the invention to maximize the penetrating effect of the explosive jet by reference to four parameters: (1) Adjusting the explosive charge to liner mass ratio to achieve a balance between the amount of explosive used in a shaped charge and the areal density of the liner material; (2) Adjusting the ductility of each layer of a multi-layer liner to enhance the formation of a longer energy jet; (3) Buffering the intermediate layers of a multi-layer liner by varying the properties of each layer, e.g., composition, thickness, ductility, acoustic impedance and areal density, to protect the final inside layer of high density material from shattering upon impact of the explosive force and, instead, flow smoothly into a jet; and (4) Adjusting the impedance of the layers in a liner to enhance the transmission and reduce the reflection of explosive energy across the interface between layers.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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