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Separator Jetting – Cyclonic Jetting Unit and Flow Patterns (post B-FSM-123)

Cyclonic jetting technology is an offshoot of solid-liquid hydrocyclone technology. The unit is a modified hydrocyclone with the cone/apex removed to allow for shielded vortex combined spray and suction flow.

Note: Please read post B-FSM-049 first to reference the flow patterns of a solid-liquid hydrocyclone and desander.

Cyclonic Jetting Device Flow Pattern

Refer to the graphic below pertaining to the flow pattern description.

  • The cyclonic jetting device is a solid-liquid hydrocyclone with a truncated or absent cone.
  • The vortex finder is extended past the body cylinder – into the section where the cone would normally be present.
  • These geometric changes allow for uncoupled vortices – i.e. the irrotational outer and rotational vortices are separated resulting in two irrotational vortexes
  • The annular vortex fluidizes the surrounding settled sand while the center vortex captures the suspended sand particles
  • A cyclonic jetting device operates with a pressure differential ratio (PDR) from 1.3-1.5 to balance the flow split (S)
  • These vortexes result in shielded vortex sand removal from the vessel. This operation prevents turbulence above solids removal zone. The solids are fluidized, captured, and transported in one compact device.

The header picture shows the operation of a single cyclonic jetting device in a vertical vessel. The swirling flow reaches down into the settled sand, lifting the particles in an encapsulated discharge stream.

A video of the operation of this technology can be found on our company website here.

Next week I will discuss the installation of the cyclonic jetting unit in horizontal and vertical vessels.


  1. Rawlins, C.H., “Design of a Cyclonic Solids Jetting Device and Slurry Transport System for Production Systems”, paper 166118, presented at the SPE Annual Technical Conference and Exhibition, New Orleans, LA, 30 September – 2 October, 2013. https://doi.org/10.2118/166118-MS


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