| CPC E21B 43/119 (2013.01) [E21B 33/1243 (2013.01); E21B 43/116 (2013.01)] | 20 Claims |
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1. A downhole perforation tool, comprising:
an upper sub-assembly configured to couple to a downhole conveyance within a wellbore tubular installed in a wellbore that is formed from a terranean surface toward a subterranean formation;
a plurality of perforation sub-assemblies, each perforation sub-assembly comprising:
one or more perforation guns configured to initiate an explosive charge, each of the one or more perforation guns configured to activate based on an activation signal provided by a stinger tool run into the wellbore through the wellbore tubular and separately from the upper sub-assembly;
one or more ports configured to fluidly couple the wellbore with a bore that extends from the one or more ports to the upper sub-assembly to receive a wellbore fluid from the subterranean formation, through the one or more ports, and into the bore;
one or more port covers configured to move between a first position such that the one or more ports is open to the wellbore to fluidly couple the wellbore with the bore and a second position such that the one or more ports is closed to the wellbore to fluidly decouple the wellbore from the bore;
for each port cover, a sleeve positioned uphole of the port cover; and
for each port cover, at least one spring positioned between the sleeve and the port cover and to abut an uphole end of the port cover, the spring biased to urge the port cover toward the first position;
a main wellbore seal positioned between the upper sub-assembly and the plurality of perforation sub-assemblies, the main wellbore seal actuatable to anchor the downhole perforation tool to a casing in the wellbore; and
at least one secondary wellbore seal positioned between adjacent perforation sub-assemblies of the plurality of perforation sub-assemblies, the at least one secondary wellbore seal actuatable to fluidly isolate a portion of an annulus of the wellbore from another portion of the annulus of the wellbore.
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