Apparatus and method for determining an optimum phase angle for

Details Apparatus and method for determining an optimum phase angle for Apparatus and method for determining an optimum phase angle for

1993-08-06

1995-02-28

Neuder, William P.

Wells

Processes

Perforating, weakening, bending or separating pipe at an...

175 46, 166 551, 102310, E21B 43117

Patent

active

053928571

ABSTRACT:
A novel method utilizing a new mathematical formulation for determining an optimum phase angle for phasing shaped charges in a perforating gun allows a novel perforating apparatus to be designed which phases the shaped charges by an angle equal to the optimum phase angle. Therefore, when the shaped charges detonate and a plurality of perforations are produced in a formation traversed by the wellbore, since the optimum phase angle is used to phase the charges in the perforating gun, the distances between adjacent perforations in the formation are maximized. Since such distances are maximized, the liklihood that a bridge between adjacent perforations will fail is substantially reduced.

REFERENCES:
patent: 4726431 (1988-02-01), Oestreich et al.
patent: 4844170 (1989-07-01), Gill
patent: 4960171 (1990-10-01), Parrott et al.
patent: 5054564 (1991-10-01), Oestreich et al.

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