Quick, browser-based calculators for everyday drilling, completion and workover engineering. Bookmark this page — more are added over time.
How many sacks of barite to raise your mud to a target weight. Live results, worked formula and field notes.
Open calculator →Buoyancy factor from mud weight, and the buoyed (effective) weight your string hangs at in that fluid.
Open calculator →Capacity, displacement and steel volume of pipe or tubing from OD and ID, with totals over length.
Open calculator →Annular capacity and total volume between the hole (or casing ID) and the pipe OD run inside it.
Open calculator →Elastic stretch of a pipe string under an applied pull, from length and steel cross-sectional area.
Open calculator →Estimate free pipe above a stuck point from a measured stretch and the differential pull that caused it.
Open calculator →Safety factor and margin of overpull from a pipe rated body yield or joint strength against the actual load.
Open calculator →Net external collapse load at depth versus a pipe rated collapse, with a collapse safety factor.
Open calculator →The tools are free — the expertise is available to hire.