Walter R Henry

Address:

3212 Brett Jackson Dr, Crowley, TX 76036

Phone:

(817)2970129

VIN:

2GCEC13C881123327

Make:

CHEVROLET

Model:

SILVERADO

Year:

2008

US Patent:

44548141, Jun 19, 1984

Filed:

Jul 7, 1982

Appl. No.:

6/396027

Inventors:

Walter B. Henry - Fort Worth TX
John F. McNeely - Cleburne TX
Harrold D. Owen - Fort Worth TX

Assignee:

Pengo Industries, Inc. - Fort Worth TX

International Classification:

F42D 104
E21B 43118

US Classification:

102200

Abstract:

The invention relates to improved systems and methods for selectively firing perforating guns in well bores and is concerned primarily with the production of a positive confirmation to the effect that each actuation at the operator control station intended to cause a firing of a particular shaped charge did or did not in fact result in the firing of that shaped charge. Such positive confirmation is accomplished by methods which involve the passage of measuring current from a constant current source through certain conductive loops to develop signals that are a function of the conductive loop resistance, the storage and comparison of said signals, and the display of resultant information. Due to certain phenomena, satisfactory measurement results will not be achieved unless a measuring current of substantial magnitude is used. The various parameters involved are treated.