Boring or penetrating the earth – Boring with explosion in inaccessible hole – With bore condition firing control – or compensating means
Patent
1985-06-11
1986-07-08
Leppink, James A.
Boring or penetrating the earth
Boring with explosion in inaccessible hole
With bore condition firing control, or compensating means
175 456, E21B 43116
Patent
active
045987769
ABSTRACT:
A more reliable operation of a multisection perforating gun for a subterranean well is achieved by disposing a detonation-transmitting element in parallel relationship to the conventional arrangement of booster charges and primer cords by which the detonating energy is transmitted from one gun section to the next. In one embodiment the detonation-transmitting element extends adjacent the primer cord from the upper portion of a gun section to a medial portion of the primer cord in the gun section, where the bottom end of the detonation-transmitting element is secured to an auxiliary booster charge having sufficient detonating energy to effect the detonation of the medial portion of the primer cord. In another modification, the detonation-transmitting element is radially spaced from the primer cord and has a circular, radially disposed portion at its upper end which is ignited by the booster charge secured to the bottom end of the flame-transmitting element in the upwardly adjacent section.
REFERENCES:
patent: 2925775 (1960-02-01), McKee
patent: 3648785 (1972-03-01), Walker
patent: 4011815 (1977-03-01), Garcia
patent: 4491185 (1985-01-01), McClure
Baker Oil Tools, Inc.
Bui Thuy M.
Leppink James A.
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