Circulation shaped charge

Ammunition and explosives – Blasting – Detonation wave modifying

Patent

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Details

102476, 102501, 175 45, 175 457, F42B 102, F42B 1210

Patent

active

056334753

ABSTRACT:
An apparatus for generating a large perforation in a target such as a wellbore casing. A recess in a housing has a closed end and an open end facing the target. A shaped liner in the recess has an apex facing the recess open end, and has a base end facing the closed end of the recess. The shaped liner defines an interior volume filled with explosive material. The explosive material is detonated and expands the liner against the recess wall and forms a perforating jet which moves toward the recess open end. If the recess open end is circular, the perforating jet exits the recess as an annular jet which impacts the target and cuts a plug section from the target. The penetrating power of the jet is confined to the annular cutting area instead of being focused into a conventional jet shape. Multiple shaped liners can be placed in the recess, and the shape of the perforating jet can be modified by the liner shape and recess dimensions.

REFERENCES:
patent: 2797892 (1957-07-01), Ryan
patent: 2831429 (1958-04-01), Moore
patent: 3003556 (1961-10-01), McGehee
patent: 3016014 (1962-01-01), Lebourg
patent: 3224368 (1965-12-01), House
patent: 3862600 (1975-01-01), Tocco
patent: 4312273 (1982-01-01), Camp
patent: 4421032 (1983-12-01), Rudolf et al.

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