Wellbore gun perforating system and method
View Patent ↗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.
1. An electrical system for use in a perforating gun assembly, said system comprising:
(a) a first perforating gun;
(b) a first switch sub;
(c) a second switch sub;
wherein
said first switch sub comprises a first switch;
said second switch sub comprises a second switch;
said first switch is configured with a first fire output, a first ground output and a first through output;
said second switch comprises a detonator; said detonator is configured with a detonator fire input and a detonator ground input through said first perforating gun;
said second switch is configured with a second ground input and a second through input;
said first fire output electrically connected directly to said detonator fire input through said first perforating gun; and
said first through output is electrically connected directly to said second through input through said first perforating gun.
2. The electrical system of claim 1 wherein said first ground output is electrically connected to said detonator ground input and to said second ground output.
3. The electrical system of claim 1 wherein said detonator ground input is electrically connected to an electrical ground in said second switch sub.
4. The electrical system of claim 1 wherein said first switch is further configured with a first ground input, a first through input.
5. The electrical system of claim 1 wherein said second switch is further configured with a second fire output, a second ground output and a second through output.