Among the main issues encountered with mature fields are decline in well flowing pressures which, in many cases, is inadequate to overcome backpressure imposed on the wells by the downstream system, resulting in reduced production or complete cessation of flow from the well.

The SEP-iSYS™ Low Pressure Production Unit (LPPU) operates at pressures close to atmospheric pressure, enabling wells to produce into the system at significantly reduced imposed backpressure. This novel system consist of two vessels, a low pressure separator to receive production fluids and a surge vessel that operates in batches to discharge the fluids at a higher pressure using high pressure motive gas.

The system is an automated system that allows the surge vessel to switch between receiving production fluids at low pressure and discharging liquids at higher pressure without requirement of operator intervention. The system is a compact, self-contained system with no rotating equipment allowing for easy installation and operation on unmanned well-head platforms.