FREE WATER KNOCKOUT

 

Engineering Technology, Inc. (ETI) provides systems to process and remove oil from principally produced water streams. Treating elements include wave-baffles, enhanced coalescing devices, degassing, & settling time. ETI offers FWKOs for a variety of applications for three-phase operation in vertical and horizontal configurations, as well as with incorporation of splitter boxes for flow averaging crude oil to multiple treating vessels.

 

REASONS FOR FWKOs

During crude oil production, some oil wells begin to increase the water content in the produced fluids. As the stream concentration approaches 70% water, water becomes the continuous phase. The FWKO has retention times that exceed conventional gas/liquid separators and can process the larger volumes of water. The quantity of gas normally is reduced at this stage of production, and a higher quality of oil and water is required.

 

THE PROCESS

Gases, water, and oil can be processed through a FWKO to skim off the oil, clean up the water, and degas the fluids.  After this stage of separation, the water is routed to final coalescers, hydro-cyclones, or flotation equipment, while the crude oil is delivered to heater treaters for further processing; and the gas is recovered/used as fuel. The purpose of the FWKO is to generate a relatively low water-cut oil phase, a relatively clean water phase, and a clean gas phase. The design of FWKOs is generally 150 microns oil-in-water for gutless vessels to 60 microns oil-in-water for enhanced coalescing devices. The practical limit of enhanced settling devices is 50 microns oil-in-water (also referred to as a Skimmer vessel). Sizing is often referred to in terms of 50-100 BPD/ft2.  For heavy oils, FWKOs are designed around the quality of the oil emulsion rather than water quality.

 

OPTIONS & FEATURES

  • ENHANCED COALESCING DEVICES
  • INTERNAL COATING
  • ALLOY MATERIALS
  • PIPING TO SKID EDGE
  • FACTORY INSULATION
  • FIRETUBES
  • VORTEX TUBES
  • DEMISTING VANE OR MESH PAD
  • SKID-MOUNTED MODULES
  • LADDERS AND PLATFORMS
  • HEATING ELEMENTS