eProcess Technologies

Open and Closed Dewatering (B-FSM-159)

There are two classes of final dewatering – Open and Closed. The selection depends on the level of hazardous contaminants in the system.

Open Dewatering

  • Uses bulk dewatering bag and open frame or covered bin (splash guard)
  • Vapors to atmosphere
  • Gravity filter/drain of liquid to skid pan and return to open drain
  • Solids retained in dewatering bag
  • Simple and cheap process and operation

Closed Dewatering

  • Uses bulk dewatering bag and enclosed frame
  • Vapors captured to vent or process system
  • Gravity filter/drain of liquid to enclosed skid pan and return to closed drain or process
  • Solids retained in dewatering bag
  • Enclosed bin with removable lid, sight glasses, vent, sloped bottom drain, and internal frame to hold dewatering bag
  • Bin sits on load cell platform and entire system in frame
  • Costly and complex design and operation

References:

  1. Rawlins, C.H. and Wang, I. 2001. “Design and Installation of a Sand-Separation and -Handling System for a Gulf of Mexico Oil Production Facility”. SPE Production and Facilities, August, pp. 134-140. https://doi.org/10.2118/72999-PA
  2. Rawlins, C.H. 2019. “Enhanced Production Through Surface Facilities Sand Management.” SPE Distinguished Lecturer presentation. Link here
  3. Rawlins, C.H. “What to do with Produced Solids after Separation: Dewatering, Transport, and Disposal.”. White Paper Publication, eProcess Technologies. Link here

Next week I will cover the dewatering filter-bag system.

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