Wells – Processes – Perforating – weakening – bending or separating pipe at an...
Reexamination Certificate
2006-05-18
2009-02-10
Bagnell, David J (Department: 3672)
Wells
Processes
Perforating, weakening, bending or separating pipe at an...
C166S055200, C175S004540
Reexamination Certificate
active
07487833
ABSTRACT:
Safety apparatus is disclosed for providing ballistic train interruption in a perforating system. The safety apparatus comprises a generally tubular shaped housing having first and second ends which are fabricated to permit the housing to be positioned at any location in the perforating system. The apparatus comprises first and second ballistic sections in the housing and a third ballistic section which is rotatably mounted in the housing to move between a disarmed position and an armed position based on downhole pressure. Upon retrieval of the perforating system from the wellbore, the safety apparatus functions to return a third ballistic section to its disarmed position. Additionally, apparatus is provided to permanently disable the third ballistic section to insure that no inadvertent detonation of the guns occurs when retrieving the system from a wellbore.
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Grigar Larry
Hromas Joe C.
Bagnell David J
Clarence E. Eriksen & Associates, P.C.
Galloway Bryan P.
Hutchins Cathleen R
McGoff Kevin B.
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