Drilling & Mud Engineering Calculators

Hydraulics

Calculate drilling pump output from pump geometry and operating rate.

Hydraulics

Estimate circulating pressure when the pump rate changes.

Hydraulics

Assess the hydraulic power a pump delivers at a given rate.

Hydraulics

Evaluate bit nozzle performance and hydraulic energy delivered at the bit.

Hydraulics

Review pressure losses around the full circulating system.

Hydraulics

Estimate equivalent circulating density during circulation.

Hydraulics

Estimate return density when cuttings are loading the annulus.

Hydraulics

Evaluate annular fluid velocity for hole-cleaning planning.

Hydraulics

Check whether the circulating rate is transporting cuttings adequately.

Hydraulics

Plan lag time and strokes for samples to reach surface.

Volumes & capacities

Determine usable volume of a rectangular surface tank.

Volumes & capacities

Determine usable volume of a cylindrical surface tank.

Volumes & capacities

Determine total wellbore volume for planning and tracking.

Volumes & capacities

Determine annular volume across multiple wellbore sections.

Volumes & capacities

Determine internal capacity of pipe and tubulars.

Volumes & capacities

Determine steel displacement when running or pulling pipe.

Volumes & capacities

Estimate the volume of drilled solids generated while drilling.

Volumes & capacities

Track expected hole fill and displacement while tripping.

Well pressure & control

Determine hydrostatic pressure at a given depth.

Well pressure & control

Convert between downhole pressure and equivalent mud weight.

Well pressure & control

Estimate pressure effects caused by pipe movement.

Well pressure & control

Assess allowable shut-in casing pressure limits.

Well pressure & control

Assess formation pressure indicated by shut-in conditions.

Well pressure & control

Estimate casing pressure change as an influx enters the well.

Well pressure & control

Determine the mud weight required to regain well control.

Well pressure & control

Prepare shut-in well-control data and a complete kill sheet.

Well pressure & control

Interpret leak-off test results for casing shoe strength.

Well pressure & control

Interpret formation integrity test results.

Well pressure & control

Size a slug for the desired dry pipe on trips.

Well pressure & control

Estimate the pressure needed to break gelled mud and start circulating.

Well pressure & control

Plan a lightweight spot pill and its hydrostatic effect.

Well pressure & control

Assess hydrostatic impact of losses while returns are reduced.

Well pressure & control

Assess hydrostatic loss when the hole is not kept full while pulling out.

Drilling-fluid formulas

Evaluate mud rheology from viscometer readings.

Drilling-fluid formulas

Plan weight-up, dilution and blending adjustments to mud weight.

Drilling-fluid formulas

Plan dilution to control low-gravity solids content.

Drilling-fluid formulas

Plan the dilution needed to reduce mud weight.

Drilling-fluid formulas

Plan treatment to lower the oil/water ratio of an invert emulsion.

Drilling-fluid formulas

Plan treatment to raise the oil/water ratio of an invert emulsion.

Drilling-fluid formulas

Evaluate oil and water content from a retort analysis.

Drilling-fluid formulas

Determine the density of a blended liquid phase.

Drilling-fluid formulas

Evaluate water-phase salinity from laboratory analysis.

Drilling-fluid formulas

Evaluate average solids density from a retort analysis.

Drilling-fluid formulas

Plan a blend of fluids with different densities.

Drilling-fluid formulas

Convert temperatures between field unit systems.

Drillstring mechanics

Estimate the free point and stuck depth of the drillstring.

Drillstring mechanics

Assess tensile and overpull capacity of the drillstring.

Drillstring mechanics

Assess torque, drag and buckling limits for the string.

Drillstring mechanics

Identify rotary speeds to avoid for the drillstring.

Cementing & directional

Plan a casing cement job volume and placement.

Cementing & directional

Plan directional survey positioning between stations.