Shaped Charge Tubing Cutter

摘要

A shaped charge pipe cutter is constructed with the cutter explosive material packed intimately around an axially elongated void space that is continued through a heavy wall boss portion of the upper thrust disc. The boss wall is continued to within a critical initiation distance of a half-cuter junction plane. An explosive detonator is positioned along the void space axis proximate of the outer plane of the upper thrust disc. Geometric configurations of the charge thrust disc and end-plate concentrate the detonation energy at the critical initiation zone.

主权项

1. A shaped charge tubing cutter comprising:
first and second matched explosive units, wherein each matched explosive unit is a singular element developed symmetrically about an axis of revolution, wherein the first matched explosive unit comprises a first conical metallic liner and a first metallic backing plate, wherein the second matched explosive unit comprises a second conical metallic liner and a second metallic backing plate, wherein each matched explosive unit comprises a first explosive material intimately formed between inner surfaces of the respective first and second conical metallic liners and the respective first and second metallic backing plates, wherein a truncated apex of the first conical metallic liner and a truncated apex of the second conical metallic liner are joined coaxially along a common juncture plane, and wherein an aperture extending along the axis of revolution through the first metallic backing plate and the first explosive material is empty; and an explosive detonator positioned along the axis of revolution adjacent to and externally of the first explosive material and the first metallic backing plate.