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Title: Three-phase hypervelocity projectile launcher

A hypervelocity projectile launcher for use in perforating borehole casings provides improved penetration into the surrounding rock structure. The launcher includes a first cylinder of explosive material that defines an axial air-filled cavity, a second cylinder of explosive material defining an axial frustum-shaped cavity abutting and axially aligned with the first cylinder. A pliant washer is located between and axially aligned with the first and second cylinders. The frustum shaped cavity is lined with a metal liner effective to form a projectile when the first and second cylinders are detonated. The washer forms a unique intermediate projectile in advance of the liner projectile and enables the liner projectile to further penetrate into and fracture the adjacent rock structure.
Inventors:
 [1];  [1];  [1];  [1]
  1. (Los Alamos, NM)
Issue Date:
OSTI Identifier:
869631
Assignee:
Regents of University of California, Office of Technology (Alameda, CA) LANL
Patent Number(s):
US 5370055
Research Org:
Los Alamos National Laboratory (LANL), Los Alamos, NM
Country of Publication:
United States
Language:
English
Subject:
three-phase; hypervelocity; projectile; launcher; perforating; borehole; casings; provides; improved; penetration; surrounding; rock; structure; cylinder; explosive; material; defines; axial; air-filled; cavity; defining; frustum-shaped; abutting; axially; aligned; pliant; washer; located; cylinders; frustum; shaped; lined; metal; liner; effective; form; detonated; forms; unique; intermediate; advance; enables; penetrate; fracture; adjacent; material defining; provides improved; explosive material; axially aligned; borehole casing; metal liner; shaped cavity; surrounding rock; improved penetration; hypervelocity projectile; metal line; velocity projectile; projectile launcher; axially align; borehole casings; /102/89/175/