What are Ejectors?

Ejectors (also referred to as Surface Jet Pumps, Eductors or Venturi’s) provide a simple, robust and reliable method of pumping and boosting the pressure of fluids.

The operation is based on Bernoulli’s principle, which states:

"When the speed of a fluid increases its pressure decreases and vice versa."

By increasing the velocity of a fluid as it passes through the nozzle, a low-pressure region is created within the Ejector. This region entrains and compresses the secondary LP stream, which we call the suction fluid. As the combined HP and LP streams pass through the Ejector’s diffuser section, the velocity decreases and the pressure is regained, resulting in an intermediate pressure, which lies somewhere between the LP and HP inlet pressures.

Why choose Ejectors?

Here are just a few reasons:

  • Zero emissions
  • No moving parts
  • No maintenance
  • Proven reliability
  • Easy to install
  • Simple to control
  • Low cost & weight
  • Topside or subsea installation
  • Short pay-back & significantly cheaper than mechanical pumps /compressors
  • Performance easily modified to suit depleting well conditions
  • Handles solids and two-phase without damage

In summary, Ejectors use a high-pressure fluid to compress low-pressure fluid to an intermediate pressure.