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Separator Jetting – Discharge Piping Design (B-FSM-129)

Pre-requisites for this post:

Flow Boundary Conditions

All information below is based on calculations in posts listed above

Cyclonic jetting cluster basis

  • Four heads, each at 7.5 m³/hr, produced sand in 10% salinity water

Upper boundary – erosion velocity

  • API RP 14E: 3.7 m/s (12.2 ft/s)
  • McLaury-Shirazi (SPE 56812): >30 m/s (>100 ft/s)
  • 1” pipe for single unit, 2” for four units

Lower boundary – horizontal and vertical transport velocity

  • Durand-Wasp: VMT-H = 0.65 m/s (2.1 ft/s)
  • 2X Stokes Settling @ VMT-H = 1440 µm

Boundary Conditions: 0.65-3.7 m/s (2.1-12.2 ft/s)

Pipe use: 1-2 hours per day

Slurry outlet/header piping = 2” CS/DSS pipe sufficient for duty

Mechanical Design

ASME 31.11 for slurry piping transport systems

  • Horizontal runs sloped (1:100)
  • Elbows at long radius or 5R/10R
  • >10D between elbows
  • Eccentric reducers

Full port valves of gate or rotating disc

Sample ports on vertical upflow only

Operation

NEVER introduce slurry into empty piping or process equipment

  • Pre-fill with (moving) water
  • Post-flush all piping

Next week I will start the discussion slurry dewatering and disposal for jetting systems.

References:

  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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