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Equivalent Circulating Density Calculator

ECD=MW+ΔPa0.052TVDECD = MW + \frac{\Delta P_a}{0.052TVD}

Enter mud weight, annular pressure loss, and true vertical depth. The result is the effective circulating density in ppg.

Tabular solver

Inputs

Defaults provide a quick field-unit example for the equation.

3 variables

Calculation runs locally with the shared TypeScript engine.

Formula reference

Equivalent circulating density converts annular pressure loss into an effective mud-weight value at depth during circulation.

View formula, units, and source

Assumptions

  • Annular pressure loss is known for the circulating rate and well geometry.
  • The field-unit conversion uses psi, ft, and ppg.
  • Depth is true vertical depth.

Common mistakes

  • Using standpipe pressure instead of annular pressure loss.
  • Using measured depth instead of true vertical depth.
  • Ignoring ECD margin at weak formations or casing shoes.