WELL BORE PERFORATING APPARATUS

摘要

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.