Drillstring Surge & Swab Pressure Calculator

Model pressure surges during tripping in and swab pressure reduction during pulling pipe out of hole using Burkhardt fluid clinging dynamics.

Pipe Tripping Speed V_p (ft/min):

Pipe End Condition:

Hole / Casing ID D_h (in):

Pipe / Collar OD D_p (in):

Well True Vertical Depth TVD (ft):

Mud Weight MW (ppg):

Plastic Viscosity PV (cP):

Yield Point YP (lb/100ft²):

Surge Pressure Increase (ΔP_surge):

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Swab Pressure Drop (ΔP_swab):

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Burkhardt Clinging Factor (K_c):

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Displaced Fluid Annular Velocity:

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Equivalent Surge Mud Weight:

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Equivalent Swab Mud Weight:

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Tripping Safety Evaluation:

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