The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1998
Filed:
Oct. 25, 1996
David W Ewick, North Granby, CT (US);
Daniel P Sutula, Jr, Farmington, CT (US);
Brendan M Welch, Farmington, CT (US);
Anthony Sendek, Canton, CT (US);
Willie B Eicke, Jr, Bay City, TX (US);
The Ensign-Bickford Company, Simsbury, CT (US);
Abstract
A detonation system especially useful for initiating a plurality of substantially simultaneous seismic detonations includes an electric trunkline circuit disposed on the surface of a firing site containing boreholes, within which booster charges having respective top and base portions are disposed. The booster charges are connected without intervening detonators to the downhole ends of equal-sized lengths of low-energy detonating cord, the surface ends of which are connected to semiconductor bridge-initiated electric detonators connected in series in the firing circuit. The resulting system, because of the small deviation in function time of the semiconductor bridge detonators, has greatly reduced scatter time as compared to prior art systems utilizing conventional downhole electric detonators, and has a safety advantage in that the boreholes are free of detonators. The booster charges are dimensioned and configured to direct more of their explosive energy in a downward direction than in an upward direction, and are fired at the top portion thereof, in order to maximize the downward direction of energy of the booster charge.