Transvac is a world leader in Ejector technology solutions for the subsea industry. Using IP gained over 35 years supported by a new state-of-the-art research, development and functional test facility, Transvac can provide innovative Ejector technology for subsea processing applications.
With no moving parts and no maintenance Transvac's Ejector technology is an ideal solution for subsea processing. To ensure trouble-free operation, all Transvac subsea Ejectors are designed, manufactured and tested in-house.
Operating mechanical equipment subsea requires huge amounts of energy, often megawatts of power. Ejector technology can operate using existing energy and therefore operating costs can be negligible.
Mechanical equipment requires special designs for performing subsea. Ejector designs change very little whether subsea or topside.
Subsea Sand Slurry Ejector installed on TORDIS
TORDIS - The worlds first Subsea separation system
Ejector technology will provide reliable performance at a fraction of the capital and operating costs of alternative rotating mechanical equipment. In many cases an Ejector can eliminate the need for rotating mechanical equipment if sufficient energy is available from the wells.
Flows can be simply calculated using pressure drop data across the Ejector, thereby negating the need for flow metering instrumentation.
Materials of construction and mechanical design meet project specific subsea piping standards. Transvac also provides ceramic nozzle and diffuser components for abrasive applications which have been proven over many years on topside applications.
Transvac supplied the first subsea processing Ejector on the TORDIS project for Statoil.
Testing Transvac patented Ejector, for Campos Basin, Brazil
Subsea Applications:
Hydrocyclone pressure boosting
Separator flushing
Sand slurry pumping / boosting
Boosting multi-phase Degasser flow
Recovery of LP Gas
LP well production boosting
Unloading wells
Multi-phase pumping
Micro-bubble generation
Flow metering
Flow Restrictor / Pressure let-down
Transvac Subsea Ejector during performance mapping
CFD Modeling for a Subsea Ejector
Sand Slurry Pumping
Transvac Liquid Jet Pump
with ceramic internal parts
Transvac Eductors (also called Liquid Jet Pumps) are an ideal method of transporting sand slurries from Separators or Cyclones as part of a de-sanding / sand washing system for the Oil & Gas and allied industries. Accumulated sand is normally fluidised; to ensure it will flow, using jets of water by-passed from the motive water supply, prior to entering the suction port of the Eductor.
Transvac sand slurry Eductors are manufactured as standard with ceramic motive water nozzles and ceramic throat inserts to resist abrasion. The body of the Eductor is available in 316L stainless steel, carbon steel, duplex steel or super duplex steel.
For high liquid flow applications an energy efficient solution is to combine a small low energy, high pressure pump with a Transvac Ejector. The Ejector can entrain 5 parts suction flow for every 1 part motive flow, delivered by the mechanical pump. The combined 6 parts flow can then be discharged at an intermediate pressure into the process to flush vessels.
Transvac designed tested and manufactured a flushing Ejector for Campos Basin, Brazil
Subsea Production Boosting
All Ejector systems are custom designed to suit the Well operating conditions with one or a number of Ejectors installed in parallel for maximum operating flexibility. The systems are compact, use simple controls and can operate across a wide range of pressures and flows.
Filter Backwashing
Transvac Liquid Jet Pump with ceramic internal parts
Ejectors in this case called Liquid Jet Pumps can be used to back flush filters used as part of mechanical subsea pumping systems.
To resist erosion from entrained solids the Liquid Jet Pump motive nozzle and throat would usually be made from high grade ceramics.
Transvac angled Flow Restrictor for subsea operation
in duplex with ceramic internal parts
Transvac Flow Restrictors are used to provide resistance to fluid flow resulting in energy loss. As fluid passes through the custom design flow nozzle, the pressure drop limits the pressure or fluid velocity in the downstream pipeline.
With no moving parts and erosion resistant materials Transvac Flow Restrictors offer a robust and reliable method of controlling fluid flow / pressure.
Discharge flows can be determined using operating curves produced by Transvac during performance mapping.
Flow Restrictors are available as straight through (in-line) or angled designs.
