Time delay perforating apparatus

Details Time delay perforating apparatus Time delay perforating apparatus

1990-11-21

1992-01-07

Neuder, William P.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

175 454, E21B 431185

Patent

active

050782100

ABSTRACT:
A time delay perforating apparatus and method of use. The apparatus includes at least one first and second gun with a time delay device positioned therebetween. The time delay device delays firing of the second gun for a predetermined period after firing of the first gun and prevents fluid communication between the first and second guns. The time delay device is positioned in a housing interconnecting the first and second guns and closes off a central opening through the housing. The time delay device includes a body with a primer assembly, a firing pin for detonating the primer assembly, an ignition mix ignited by detonation of the primer assembly, a time delay mix triggered by ignition of the ignition mix, and an explosive disposed in the body. The firing pin is oriented such that it closes off a central opening through the body. The explosive includes a primary explosive triggered by the time delay mix and a secondary explosive triggered by the primary explosive. The time delay device directs its explosive output to fire the second gun.

REFERENCES:
patent: 3011551 (1961-12-01), Young et al.
patent: 3189094 (1965-06-01), Hyde
patent: 3706344 (1972-12-01), Vann
patent: 4478294 (1984-10-01), Sumner
patent: 4614156 (1986-09-01), Colle, Jr. et al.
patent: 4619333 (1986-10-01), George
patent: 4690227 (1987-09-01), George et al.
Exhibit A-Drawing.
Vann Systems Engineered Well Completion Product Catalog, pp. A-5-A-7; B1-B3; and B-3; and TCP 1001; TCP 1013; TCP 1022; TCP 1014; TCP 1016; TCP 1020; TCP 1018; and TCP 1024.

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