Oilfield Calculator: Drilling

Oilfield Drilling & Blast Calc is a professional engineering calculator suite built for drilling rigs, mine benches, and quarry pits. Ten focused tools for mud engineers, drilling engineers, blast engineers, mining engineers, and field technicians — all running fully offline, so you get answers whether you are at a remote wellsite, a pit wall, or an underground heading with zero signal.

No ads. No subscriptions. No sign-up. Open the app and calculate.

WHAT'S INCLUDED:

Drilling & Completion
- Mud Weight Calculator (FREE): Hydrostatic pressure, mud gradient in psi/ft, pore pressure, frac pressure at the shoe, overbalance, and kick tolerance from mud weight, TVD, and shoe depth.
- Casing Burst & Collapse: API 5C3 burst and collapse ratings from OD, grade, and weight, with safety factor, body yield, buoyed weight, and hydrostatic at depth.
- Drill String Weight: Compute drill pipe, HWDP, and collar hookload, buoyed weight, and air weight for trip planning.

Mining & Blasting
- Screen Size Selector (FREE): Pick the correct screen aperture and deck size for target particle cuts.
- Pit Slope Stability: Quick factor-of-safety check for open-pit slope angles and bench geometry.
- Blast Hole Pattern: Burden, spacing, stemming, and powder factor for surface blast design.
- Rock Density & Porosity: Bulk density, grain density, and porosity from lab or field samples.
- Mine Ventilation Airflow: Size airflow, velocity, and pressure drop for underground mine ventilation circuits.

Environmental & Flow
- Flow Weir Calculator: V-notch, rectangular, and Cipolletti weir discharge for field water measurement.
- Sludge Volume & Dewatering: Wet weight, dry solids, moisture content, and dewatered volume and weight for pit and process water.

WHO IS IT FOR:
- Drilling engineers sizing casing and planning trips
- Mud engineers mixing and monitoring circulating systems
- Blast engineers laying out shot patterns and powder loads
- Mining engineers running pit and ventilation checks
- Quarry operators screening aggregate
- Field technicians and supervisors who need answers on the rig floor or bench

WHY OILFIELD & MINING PROS LOVE IT:
- Fully offline — works at the wellsite, underground, or deep in the pit with no cell service
- No ads and no subscription — pay once, own it
- API-aware and MSHA-aware inputs that match the units and conventions you already use on the job
- Professional accuracy with clear formulas, unit conversions, and sensible defaults
- Clean iPhone and iPad interface designed for gloves, hard hats, and bright sunlight

ONE-TIME UNLOCK:
Upgrade to Pro for a single $12.99 USD payment (non-consumable, no subscription) to unlock all 8 Pro calculators plus job sheet PDF export. Buy once, use forever — on every iPhone and iPad signed in to your Apple ID.

From the rig floor to the quarry bench, Oilfield Drilling & Blast Calc keeps the numbers you need one tap away. Download now and put a full drilling and mining toolkit in your pocket.