US12709965 - Shock resistant perforating tool for multizone completions

The patent describes a shock-resistant perforating tool designed for wellbore applications, featuring multiple perforator units connected by a signal transfer module that includes an initiator, igniter, fuse, and isolator. The design emphasizes non-projectile activation and incorporates shock attenuators to prevent unintended activation of the fuse from shock and vibration.

Claim 1

1 . An apparatus for perforating a wellbore, comprising: a plurality of perforator units that includes at least a first perforator unit and a second perforator unit; and a signal transfer module connecting the first perforator unit to the second perforator unit, the signal transfer module including: an enclosure having a bore, an input end, and an output end, an initiator positioned adjacent to the first perforator unit and at least partially in the enclosure, the initiator configured to generate a shock wave when initiated, an igniter positioned in the enclosure and adjacent to the initiator, the igniter configured to generate a low order detonation upon receiving the shock wave generated by the initiator, wherein the initiator and the igniter are configured to interact principally through a non-projectile activation, a fuse positioned in the enclosure and configured to be initiated by the low order detonation of the igniter, the fuse outputting a high order detonation from the output end of the enclosure, and, an isolator securing the fuse in the bore of the enclosure using at least one motion transmitting connection, wherein every motion transmitting includes at least one shock attenuator, wherein the at least one shock attenuator attenuates at least one of: shock and vibration, and wherein the attenuation is at least enough to prevent activation of the fuse. a plurality of perforator units that includes at least a first perforator unit and a second perforator unit; and a signal transfer module connecting the first perforator unit to the second perforator unit, the signal transfer module including: an enclosure having a bore, an input end, and an output end, an initiator positioned adjacent to the first perforator unit and at least partially in the enclosure, the initiator configured to generate a shock wave when initiated, an igniter positioned in the enclosure and adjacent to the initiator, the igniter configured to generate a low order detonation upon receiving the shock wave generated by the initiator, wherein the initiator and the igniter are configured to interact principally through a non-projectile activation, a fuse positioned in the enclosure and configured to be initiated by the low order detonation of the igniter, the fuse outputting a high order detonation from the output end of the enclosure, and, an isolator securing the fuse in the bore of the enclosure using at least one motion transmitting connection, wherein every motion transmitting includes at least one shock attenuator, wherein the at least one shock attenuator attenuates at least one of: shock and vibration, and wherein the attenuation is at least enough to prevent activation of the fuse.

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USPTO PDF

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