Downhole charge carrier

Details Downhole charge carrier Downhole charge carrier

1992-04-06

1994-06-28

Brown, David H.

Ordnance

Well perforators

175 46, E21B 43117

Patent

active

053236840

ABSTRACT:
This invention discloses downhole explosive carriers in which the explosive charges are mounted in a unique staggered spiral pattern thereby allowing a greater number of shots that can be fired per unit length while increasing the spacing between explosive charges; the latter advantage further reduces the potential interference between fired shots and pressure change therefore providing a greater perforated hole size. With a 31/2-inch gun perforating through a 41/2- to 5-inch casing, one trip of the present invention downhole provides as much or greater flow area than what could be achieved by two trips of a conventional gun, while eliminating the risk of splitting the casing which can be caused due to multiple shooting. With a 33/8-inch gun perforating a 5-inch trip of the current invention equals two trips of a conventional gun of the same size, plus a 10% improvement in flow rate.

REFERENCES:
patent: 4552234 (1985-11-01), Revett
patent: 4773299 (1988-09-01), 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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