Perforating apparatus energy absorber and explosive charge holde

Boring or penetrating the earth – Boring with explosion in inaccessible hole – Concave-shaped charge

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Details

175 456, 102310, E21B 4317

Patent

active

044284403

ABSTRACT:
In a perforating apparatus which has a plurality of explosive charges contained in an elongated tubular perforating gun body and supported on a carrier an energy absorber and explosive charge holder are provided by the present invention. The carrier extends longitudinally in the gun body and has the cases of the explosive charges mounted therethrough with a detonating cord or prima cord positioned at the detonating end portion of the several explosives charges. The energy absorber and explosive charge holder comprises a shaped metallic shield that grasps sides of an explosive charges case to secure it in a rigid fixed position on the carrier. An aperture in this shield permits passage of the detonating cord over the detonating end portion of the charge case and retention of it at that location. The shield encircles the detonating end portion of the explosive charge case and covers sides of the case such that upon detonation of the explosive charge laterally directed energy from the growth of the explosion is absorbed by the shield.

REFERENCES:
patent: 2980017 (1961-04-01), Castel
patent: 3346057 (1967-10-01), Bell
patent: 3739723 (1973-06-01), Hakala
patent: 3773119 (1973-11-01), Shore
patent: 3965993 (1976-06-01), Lavigne et al.
patent: 4071096 (1978-01-01), Dines
patent: 4312273 (1982-01-01), Camp
patent: 4326462 (1982-04-01), Garcia et al.
patent: 4371044 (1983-02-01), Willig et al.

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