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A perforating gun having an elongated, spiral strip with an outer surface, cylindrical about a longitudinal axis, and a diameter sized for convenient entry and removal from a well. The strip has a series of threaded openings spaced in intervals for mounting capsule explosive charges in a phased rela

A perforating gun having an elongated, spiral strip with an outer surface, cylindrical about a longitudinal axis, and a diameter sized for convenient entry and removal from a well. The strip has a series of threaded openings spaced in intervals for mounting capsule explosive charges in a phased relationship between 0 and 360 degrees. The cross-sectional area of the strip around each opening is selected to prevent fragmentation of the carrier upon detonation of the charges. The spiral strip is preferably metallic and forms a helical band with a pitch in a range of 12 to 24 inches. In each threaded opening is an explosive capsule with a hollow cap having at one end a threaded nose for attachment to one of the threaded openings. The cap has an annular, interior thread with a thread run-out of selected width at the other end. The capsule has a hollow body having an open end with exterior threads with a width less than the width of the thread run-out in the cap to permit free spinning of the body in the cap after thread make-up. The closed end of the body has a slot and retainer to receive a detonating cord. The hollow body of the explosive capsule may be freely spun to align the slot and retainer for convenient threading and connection with the detonating cord.

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A perforating gun for carrying a plurality of shaped charge explosives connecting by a detonating cord to perforate a section of a well in a selected pattern, comprising: an elongated, spiraled strip having an outer diameter sized for convenient entry and removal from a well; a series of openings sp

A perforating gun for carrying a plurality of shaped charge explosives connecting by a detonating cord to perforate a section of a well in a selected pattern, comprising: an elongated, spiraled strip having an outer diameter sized for convenient entry and removal from a well; a series of openings spaced in intervals along a length of the spiraled strip to serve as mounts for the shaped charge explosives to be arranged in an angular phase relationship to correspond with said selected perforation pattern in the well; the cross-sectional area of the spiraled strip around each opening being selected to prevent fragmentation of the carrier upon detonation of the charges; whereby the spiraled strip may be positioned in the well, the explosives detonated to create perforations in the selected pattern and the spiraled strip retrieved from the well; wherein said openings of the spiraled strip are threaded; and wherein the perforating gun has an explosive capsule charge which comprises: a cap having a threaded nose for engagement with a threaded opening of said spiraled strip; the cap being hollow to contain explosive and terminating in an annular, interior thread with a thread run-out of selected width; a hollow body to contain said explosive and having an open end with exterior threads having a width less than the width of the thread run-out in the cap to permit free spinning of the body in the cap after thread make-up; a slot and retainer to receive a detonating cord on a closed end of the hollow body; whereby the hollow body may be freely spun to align said slot and retainer for convenient threading and connection of the detonating cord with the explosive capsule charge.