A gun to gun transfer delay fuse that includes a delay housing, a first cylindrical cavity housing a firing pin and igniter, and a second cylindrical cavity housing a delay fuse with a centralizer feature.

Select-fire, downhole shockwave generation devices, hydrocarbon wells that include the shockwave generation devices, and methods of utilizing the same are disclosed herein. The shockwave generation devices are configured to generate a shockwave within a wellbore fluid that extends within a tubular conduit of a wellbore tubular. The shockwave generation devices include a core, a plurality of explosive charges arranged on an external surface of the core, and a plurality of triggering devices. Each of the plurality of triggering devices is associated with a selected one of the plurality of explosive charges and is configured to selectively initiate explosion of the selected one of the plurality of explosive charges. The methods include methods of generating a shockwave utilizing the downhole shockwave generation devices.

Method and systems of controlling detonation of a plurality of explosive charges. A controller has a magneto-inductive transmitter to transmit a magneto-inductive signal to a plurality of detonators, each having a receiver to receive the magneto-inductive signal and a respective firing delay time. The method includes, at each of the plurality of detonators, receiving, via the magneto-inductive signal from the magneto-inductive transmitter, a time sync signal; synchronizing a local clock in the detonator based on the time sync signal; receiving, via the magneto-inductive signal from the magneto-inductive transmitter, a firing code; waiting the respective firing delay time from receipt of the firing code, wherein the waiting is clocked by the local clock; and after expiry of the respective firing delay time, triggering a respective explosive associated with the detonator.

A firing system comprising an electronic initiator, and a blasting unit connected to and capable to initiate the electronic initiator, wherein the electronic initiator comprises an external housing made of plastics, an explosive charge, a fuse head and an electronic delay element, the external housing comprising an inner cavity and retaining means adapted to retain at least one shock tube, the explosive charge, the fuse head and the electronic delay element being located in the inner cavity of the external housing, the explosive charge being located at a closed end of the inner cavity, at a position such that the explosive charge is capable to ignite the shock tubes retained by the retaining means in a use situation of the electronic initiator, the fuse head and the explosive charge being located relative to each other such that the fuse head is capable to ignite the explosive charge, and the electronic delay element being connected to the fuse head and being configured to initiate it.

A firing system comprising an electronic initiator, and a blasting unit connected to and capable to initiate the electronic initiator, wherein the electronic initiator comprises an external housing made of plastics, an explosive charge, a fuse head and an electronic delay element, the external housing comprising an inner cavity and retaining means adapted to retain at least one shock tube, the explosive charge, the fuse head and the electronic delay element being located in the inner cavity of the external housing, the explosive charge being located at a closed end of the inner cavity, at a position such that the explosive charge is capable to ignite the shock tubes retained by the retaining means in a use situation of the electronic initiator, the fuse head and the explosive charge being located relative to each other such that the fuse head is capable to ignite the explosive charge, and the electronic delay element being connected to the fuse head and being configured to initiate it.

A device and a method thereof for operating a stemming rod used for the blasting and configured to include an information collection function are proposed. The device includes a stemming material information collection unit configured to collect stemming material information including information related to energy applied and compaction counts when filling a stemming material into a blast hole, from a sensor built into the stemming rod used for the blasting, a communication-performing unit configured to perform wireless communication with a detonator to be charged through a communication module built into the stemming rod used for the blasting, and a blasting time controller configured to control a blasting time on the basis of detonator information and location information of the stemming rod used for the blasting, the information being collected from the communication-performing unit.

A device and a method thereof for operating a stemming rod used for the blasting and configured to include an information collection function are proposed. The device includes a stemming material information collection unit configured to collect stemming material information including information related to energy applied and compaction counts when filling a stemming material into a blast hole, from a sensor built into the stemming rod used for the blasting, a communication-performing unit configured to perform wireless communication with a detonator to be charged through a communication module built into the stemming rod used for the blasting, and a blasting time controller configured to control a blasting time on the basis of detonator information and location information of the stemming rod used for the blasting, the information being collected from the communication-performing unit.

A wellbore perforating system and method with reliable and safer connections in a perforating gun assembly is disclosed. The system/method includes a gun string assembly (GSA) deployed in a wellbore with multiple perforating guns attached to plural switch subs. The perforating guns are pre-wired with a cable having multi conductors; the multi conductors are connected to electrical ring contacts on either end of the perforating guns. The switch subs are configured with electrical contacts that are attached to the electrical contacts of the perforating guns without the need for manual electrical connections and assembly in the field of operations. The system further includes detonating with a detonator that is positioned upstream of the perforating gun. The detonator is wired to a switch that is positioned downstream of the perforating gun.

A wellbore perforating system and method with reliable and safer connections in a perforating gun assembly is disclosed. The system/method includes a gun string assembly (GSA) deployed in a wellbore with multiple perforating guns attached to plural switch subs. The perforating guns are pre-wired with a cable having multi conductors; the multi conductors are connected to electrical ring contacts on either end of the perforating guns. The switch subs are configured with electrical contacts that are attached to the electrical contacts of the perforating guns without the need for manual electrical connections and assembly in the field of operations. The system further includes detonating with a detonator that is positioned upstream of the perforating gun. The detonator is wired to a switch that is positioned downstream of the perforating gun.

A wellbore perforating system and method with reliable and safer connections in a perforating gun assembly is disclosed. The system/method includes a gun string assembly (GSA) deployed in a wellbore with multiple perforating guns attached to plural switch subs. The perforating guns are pre-wired with a cable having multi conductors; the multi conductors are connected to electrical ring contacts on either end of the perforating guns. The switch subs are configured with electrical contacts that are attached to the electrical contacts of the perforating guns without the need for manual electrical connections and assembly in the field of operations. The system further includes detonating with a detonator that is positioned upstream of the perforating gun. The detonator is wired to a switch that is positioned downstream of the perforating gun.