Provided is a method of operating a blasting system. A blasting device is synchronized with a detonator. A unit group including a plurality of the detonators is set. A first detonator is set from among the plurality of detonators of the unit group. A wireless network based on the first detonator is set. The blasting device performs communications with the plurality of detonators of the unit group via the first detonator.

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.

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.

A mechanical gun to gun delay for providing a desired time delay between the firing of a first gun and the firing of a second gun downhole without using a pyrotechnic fuse as the delay.

A mechanical gun to gun delay for providing a desired time delay between the firing of a first gun and the firing of a second gun downhole without using a pyrotechnic fuse as the delay.

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.

An electronic delay detonator logging control device and a method therefor are disclosed. The state and the connection of a plurality of electronic delay detonators connected in parallel and a trunk line are inspected before blasting so as to check for an incomplete connection and prevent a partial misfire. A log counter is assigned to the plurality of electronic delay detonators such that the plurality of electronic delay detonators can be blasted in desired blasting patterns or in sequence. In the event of a failure, a logging recovery mode is operated so as to recover connection information of the plurality of electronic delay detonators.

The invention allows improved planning and implementation of blasting operations. The location of a hand-held apparatus (200) is determined based on signaling received by a high-accuracy positioning unit (220). If the location corresponds with a location of a bore hole in a stored blasting plan, an electronic detonator selected by a user is identified based on its identifier read by a NFC reader (230) of the hand-held apparatus (200), and the stored blasting plan is updated with the hand-held apparatus (200) to indicate that the assigned electronic detonator has been set in the bore hole.

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.