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AssigneeHalliburton Company
InventorsJames M. Barker, Larry L. Grigar, Dennis E. Schramek, Starlin M. Reid, Cyril R. Sumner
Estimating the term…
For use in a perforating gun assembly, a perforating gun detonator is disclosed. One embodiment is hermetically sealed while the other has openings therein to admit well fluids. In both embodiments, a narrow conductive metal foil is provided with a current to vaporize the narrow foil, explode the foil and propel a flyer driven by a shock wave for detonation of a spaced secondary explosive. The explosive then couples explosion into a detonating cord against a shoulder in a housing adjacent to the secondary explosive. The current is formed by means of an AC voltage multiplier circuit providing a charge on a capacitor which is discharged through a spark gap. Charging circuitry includes a blocking capacitor to prevent DC and a resistor for bleeding a small current from the capacitor to ground which prevents static or stray current accumulation.
A detonator for use in a well borehole for detonating explosives, comprising:
For use with a detonator connected to detonate explosives in a well borehole apparatus, an electrical impulse circuit comprising:
A method of controllably detonating a detonator in a well borehole, comprising the steps of:
Dependencies are inferred from the claim text.