Energy transfer through a multi-layer liner for shaped charges

Patent · 01 January 1985

OSTI ID:865328

Skolnick, Saul ^[1]; Goodman, Albert ^[1]

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1. Albuquerque, NM

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.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
• Other Award/Contract Number: AC04-76
• Assignee: Southwest Energy Group, Ltd. (Albuquerque, NM)
• Patent Number(s): US 4498367
• OSTI ID: 865328
• Country of Publication: United States
• Language: English

Related Subjects

/86/29/102/
accordance
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areal
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balance
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composition
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energy
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metal
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parameters
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perforators
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protect
ratio
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reference
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shaped charges
shattering
smoothly
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varying