Shaped charge having multi-point initiation for well perforating

Details Shaped charge having multi-point initiation for well perforating Shaped charge having multi-point initiation for well perforating

1987-12-28

1989-05-16

Brown, David H.

Ammunition and explosives

Blasting

Detonation wave modifying

89 115, 102309, 175 46, F42B 102, F42B 308

Patent

active

048299014

ABSTRACT:
An improved shaped charge is provided for well perforating guns utilized in hydrocarbon recovery operations. An increased diameter entry hole through the casing may be formed by the shaped charge, which is particularly beneficial when perforating gravel packed formations. The explosive powder within the charge case is initiated utilizing a multi-point discharge insert which channels the shock waves from the primer cord of the gun to multiple points each radially spaced from the center line of the charge case. A plasticizer charge is utilized to fill the relatively small diameter channels formed by the insert, and an insert material having a relatively low speed of sound is preferred to prevent detonation of the explosive powder through the insert material. By changing the configuration and the size of the insert channels, the entry hole size and depth of penetration formed by the shaped charges of the gun may be easily and inexpensively modified.

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patent: 4672896 (1987-06-01), Precoul et al.
patent: 4711181 (1987-12-01), Ringel et al.

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