// multi-utility computation suite · offline · instant · precise
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eng.drilling-thrust-torque Calculator
Calculates drilling thrust force and torque for rotary drilling from WOB, RPM, and formation properties. Optimal WOB balances ROP (increases with WOB) against bit wear (also increases with WOB) — the minimum cost per metre occurs at the economic optimum WOB.
Inputs
D Mm
Distance across a circle through its centre. Always confirm units match the rest of the calculation.
F Mm Rev
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Sigma Mpa
Energy transferred by a force over a displacement (J = N·m).
K Factor
Reference formula or conversion factor shown for context.
Results
thrust force Ft (N)
Forward propulsive force generated by the engine or motor. Net thrust = gross thrust minus inlet momentum drag.
torque Mt (N·mm)
Rotational force (N·m) = force × perpendicular lever arm. High torque at low RPM is ideal for hauling; high RPM suits high-speed applications.
power at 200 rpm spindle (kW)
The value at the specified point or condition.
Ft = K·σu·D·f
Reference formula or conversion factor shown for context.
K material factors
A dimensionless multiplier applied in the calculation.
BUE risk
Overall risk level based on the computed score or classification. Higher risk may call for mitigating actions or additional review.