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Hydrostatic Pressure in Drilling: Why Mud Weight Controls Everything
How hydrostatic pressure keeps a well under control. Mud weight, TVD, pore pressure, overbalance margins, and what happens when the numbers go wrong.
ECD Explained: Equivalent Circulating Density in Drilling Operations
What ECD is, why it matters more than static mud weight, how annular pressure losses push you toward the fracture gradient, and how to manage the operating window.
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.
Mud Weight Blending: The Math Behind Mixing Drilling Fluids
How to calculate mud blending volumes, barite additions, and dilution ratios. Mass balance equations, practical mixing sequences, and common mistakes that waste product.
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.
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.
Lag Time & Bottoms-Up Calculator
Calculate bottoms-up lag time and strokes from well geometry and pump data. Track drilling fluid returns for mud logging, gas detection, and wellbore monitoring.