Switch module for wellbore perforating gun

A tandem sub system for perforating guns comprising:

• a tandem sub including a signal pod cavity, a throughbore and a cavity for a pressure bulkhead;
• a signal pod comprising
• a chassis having a longitudinal axis;
• a printed circuit board attached to the chassis;
• a receptacle at a longitudinal first end of the chassis;
• a first electrical connector positioned within the receptacle and electrically connected to the printed circuit board;
• a second electrical connector positioned at a longitudinal second end of the signal pod opposite the first end and wherein the second electrical connector is electrically connected to the printed circuit board;
• a ground electrical contact extending from the printed circuit board and electrically connected thereto;
• and
• a detonator electrically connected to the printed circuit board and positioned between a longitudinal midline of the chassis and the first end of the chassis;
• and
• a pressure bulkhead connected to the second electrical connector where the pressure bulkhead includes conductive core and an insulating body where the conductive core is connectable to a next tool in the system.

A perforating gun system deployable in a wellbore extending through a subterranean earthen formation, the perforating gun system having a longitudinal axis and comprising:

• a first perforating gun comprising a charge carrier configured to receive one or more shaped charges, the charge carrier comprising a detonator cord housing configured to receive a terminal end of a detonator cord and support the detonator cord along the longitudinal axis;
• a tandem sub comprising a sub housing and a signal pod cavity, a throughbore and a cavity for a pressure bulkhead;
• a signal pod comprising:
• a chassis having a longitudinal axis;
• a printed circuit board attached to the chassis;
• a receptacle at a longitudinal first end of the chassis;
• a first electrical connector positioned within the receptacle and electrically connected to the printed circuit board;
• a second electrical connector positioned at a longitudinal second end of the signal pod opposite the first end and wherein the second electrical connector is electrically connected to the printed circuit board;
• a ground electrical contact extending from the printed circuit board and electrically connected thereto;
• and
• a detonator electrically connected to the printed circuit board and positioned between a longitudinal midline of the chassis and the first end of the chassis;
• a pressure bulkhead connected to the second electrical connector where the pressure bulkhead includes conductive core and an insulating body where the conductive core with a conductive axial post;
• and
• a second perforating gun also configured to receive one or more shaped charges, and including a top plate connector oriented toward the conductive axial post of the pressure bulkhead to enable electric signals received by the signal pod to pass along to the second perforating gun.