Dual ESP-ESP unit for fluid production from two reservoirs
Application

Wells with two producing reservoirs operated by electric submersible pumps.

Downhole equipment
Application
The liquid from the lower reservoir through the inner channel of the packer enters the lower submersible motor jacket and flows to the lower ESP. After getting the necessary pressure the fluid flows through the internal channel of the assembly joint, multi-pipe bypass system, flow divider and then enters the tubing string. The required bottomhole pressure for the lower layer is set by changing the operating frequency of the lower ESP.

The liquid from the upper reservoir enters the annulus above the packer and flows to the upper ESP. After getting the necessary pressure the fluid flows through the flow divider to the tubing string. The required bottomhole pressure for the upper layer is set by changing the operating frequency of the upper ESP.

1 - Tubing string;
2 - Upper ESP;
3 - Multi-pipe bypass system;
4 - Lower ESP;
5 - SEM jacket;
6 - Assembly joint;
7 – Packer.
Key Features
1. Creating individual output parameters for each reservoir;
2. Application of the upper serial ESP of 5 dimensions with SEM 96 (100);
3. Application of the lower serial ESP of 5 dimensions with SEM 103;
4. Possibility of the liquid flow rate and moisture content determining for each reservoir at the wellhead;
5. Construction of an independent pressure build-up for each reservoir.
6. In case of one of the ESP failure, the second layer remains in operation.