Boring or penetrating the earth – Boring with explosion in inaccessible hole – Concave-shaped charge
Patent
1975-09-08
1976-06-29
Novosad, Stephen J.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
Concave-shaped charge
102 20, E21B 43117, F42B 308
Patent
active
039659933
ABSTRACT:
In the representative embodiment of the present invention disclosed herein, this new and improved perforating apparatus includes a unique elongated carrier strip of a ductile steel carrying encapsulated shaped explosive charges having their forward ends fitted and snugly secured against the concave rear face of the strip by means of externally-threaded axial projections respectively threaded into tapped charge-mounting holes closely spaced along the carrier. The forward face of the carrier strip and the rear portions of the capsules are complementally shaped for accommodation within a given size of well bore piping thereby allowing the largest-possible mass of explosive to be disposed in each capsule. To assure that the new and improved perforating apparatus can be used safely in gas-filled well bores without risking either severe distortion or breakage of the carrier, additional openings are arranged in the strip between adjacent charge-mounting openings and cooperatively sized for preferentially inducing a minor transverse bend in the strip across each of these additional openings upon detonation of the adjacent charges instead of allowing the carrier to be severely bent in a substantially-uninterrupted arc or exaggerated bow along its full length.
REFERENCES:
patent: 2756677 (1956-07-01), McCullough
patent: 2980017 (1961-04-01), Castel
patent: 3048101 (1962-08-01), Lebourg
patent: 3235005 (1966-02-01), Delacour
patent: 3282213 (1966-11-01), Bell et al.
patent: 3282354 (1966-11-01), Hakala et al.
patent: 3327630 (1967-06-01), Bell
patent: 3636875 (1972-01-01), Dodson
Bouguyon Gerard
Chesnel Pierre
Lavigne Jean
Archambeau, Jr. Ernest R.
Moore Stewart F.
Novosad Stephen J.
Schlumberger Technology Corporation
Sherman William R.
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