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Annular Velocity & Hole Cleaning: Getting Cuttings Out of the Hole
Why annular velocity determines hole cleaning efficiency. Minimum AV targets, cuttings slip velocity, deviated well challenges, and flow rate optimization.
Lag Time & Bottoms-Up: Tracking What Comes Out of the Hole
How to calculate bottoms-up time and pump strokes. Why lag time matters for mud logging, gas shows, well control, and knowing what is really happening downhole.
Related Tools
Hydrostatic Pressure Calculator
Calculate hydrostatic pressure from mud weight and true vertical depth. Oilfield imperial (ppg/psi) and metric (SG/kPa) units with overbalance analysis and pressure gradient.
Equivalent Circulating Density Calculator
Calculate ECD from mud weight and annular pressure loss. Determine safe operating window between pore pressure and fracture gradient for wellbore stability.
Annular Velocity Calculator
Calculate annular velocity and flow rate for hole cleaning. Enter hole/pipe diameters and pump rate to get AV in ft/min with cuttings transport analysis.