Well Jet Pump

This example shows the use of SimHydraulics® to simulate a well jet pump installation.

The well jet pump installation presented in this example consists of a surface-mounted centrifugal pump and a jet pump installed in the well below water level by 1.5 ft. The distance between the centrifugal pump and water level is 36 ft.

The centrifugal pump discharge pressure is 20 psi and its delivery at nominal conditions is expected to be about 130 gpm. Pipeline PL1 between the centrifugal pump output and the jet pump inlet has a 2 in diameter and is 37.5 ft long. The diameter of pipeline PL2 is 4 in, and it is 36 ft long. The centrifugal pump output is divided into two parts: one goes through the check valve into the tank, and the rest is diverted to the inlet of the jet pump. The delivery of the pump assembly must be greater than 25 gpm. The centrifugal pump NPSH must be greater than 2 psi.

The jet pump parameters were initially determined based on recommendations provided in the Pump Handbook by Karassic, I. J., et al (third edition, 2001), and then modified to simplify the calculations. As a result, the primary flow rate ( $q_{1}$) of the jet pump is 104.5 gpm, the secondary flow rate ( $q_{2}$) is 26.5 gpm, and the output of the pump assembly ( $q_{p}$) is 26.5 gpm.

When you run the simulation, the simulation data is automatically logged to the workspace under the name pump_log. For more information, see About Simulation Data LoggingAbout Simulation Data Logging.