Selective perforation of multiple well zones

Selective perforation of multiple well zones

Multiple zones in a well can be selectively perforated either simultaneously, or in series, by using a system including a tubing string (24) which carries at least a first (56) and a second (76) perforating gun; at least a first (52) and a second (72) pressure actuated firing head associated with th...

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Hauptverfasser: GEORGE, FLINT R, BURLESON, JOHN D, MASON, JUSTIN L
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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creator GEORGE, FLINT R
BURLESON, JOHN D
MASON, JUSTIN L
description Multiple zones in a well can be selectively perforated either simultaneously, or in series, by using a system including a tubing string (24) which carries at least a first (56) and a second (76) perforating gun; at least a first (52) and a second (72) pressure actuated firing head associated with the first (56) and second (76) perforating guns, respectively; first (30) and second (66) packers for isolating the perforating guns from each other; and a first selective communication device (83,85,87) for isolating the second firing head (72) from a source of actuating fluid pressure until after the first perforating gun (56) has been fired, and for then communicating the second firing had (72) with a source of actuating fluid pressure in response to firing of the first perforating gun (56).
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subjects EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
title Selective perforation of multiple well zones
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