Boring or penetrating the earth – Boring with explosion in inaccessible hole – With wall engaging packer or anchor
Patent
1990-11-02
1991-08-27
Dang, Hoang C.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
With wall engaging packer or anchor
175 454, 175 456, E21B 431185
Patent
active
050425935
ABSTRACT:
A hydraulically dampened detonator for firing an oil well perforating gun can be lowered into the well on a slick line (i.e., a solid cable line) and set rigidly against the well tubing inner wall. The tool uses a hydraulically dampened piston to power a firing pin that detonates a cartridge (e.g. a .22 caliber hornet or the like) to fire an explosive charge. A jar or other commerically available weighing or loading tool can be lowered with the slick line to load the piston and firing pin to detonate the cartridge. Hydraulic dampening prevents inadvertent firing and controls a preliminary lowering of the piston just prior to firing.
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Dang Hoang C.
Songe, Jr. Lloyd J.
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