Drilling Hydraulics (Basic) vs Derrick

Drilling Hydraulics (Basic Calculations) provides an useful tool to students, drillers, technicians, drilling engineers and other professionals of the oil well drilling. Unit System with setting of decimals. Formulas and Calculations: - Capacities and Volumes - Mud Properties and Gradient - Temperature Gradient - Pressure Gradient - Hydrostatic Pressure - Mud Pump Output - Hydraulics on Drill Bit nozzles - Friction Losses (on borehole section) - ECD - Equivalent Circulating Density - Pressure with well closed (Kick/LOT/FIT) Formulas: - The factors/constants are calculated based on different units of measures. iCloud: - Auto saves to restore when to open the app again - Shares the same data on devices with same Apple ID DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

Derrick is the rotation calendar built for oilfield hands, and it actually keeps your hitch straight. Pick your rotation once (14/14, 14/7, 7/7, 21/21, 28/28, a custom on/off, or a pattern you build yourself), set the day your hitch starts, and Derrick paints your ON and OFF days correctly, for years. No drift. No "off by a day." No blank calendar when the new year rolls over. That sounds basic. It's the thing every other oilfield calendar gets wrong. NEW: build your own rotation. Line up days, nights and days off in any order, from a day and night swing to 4 on 4 off, 2-2-3 or DuPont, and see the first four weeks before you save. Building a pattern is free. CREW PASS: send your rotation to your crew or your spouse as a code and a QR. They scan or paste it and import your whole schedule in one tap, with no re-typing dates and no getting a day wrong. Free, works offline, no account. FREE • Big, glanceable countdown: HOME IN __ DAYS / BACK IN __ DAYS • Today at a glance: "On hitch · Day 9 of 14" • Full month calendar with your ON/OFF days in color; scroll years ahead or back • Agenda of your upcoming hitches and time off, with exact dates • Crew Pass: share your rotation as a code/QR; your crew imports it in one tap • Home Screen & Lock Screen widgets • Crew-change reminders the evening before • Ticket wallet: keep one ticket (H2S, BOSIET, TWIC, a medical) with expiry reminders • Day & night shifts • Works offline on the rig or at sea. No account, no sign-up. DERRICK PRO: one-time unlock (no subscription) • Whole year on one page: export a clean, printable PDF (one year per page, not 12 separate months) • Plan your life around your hitch: add birthdays, weddings, hunting season, the kids' games, and see instantly whether you'll be home or working • Estimate your pay: day rate or hourly + overtime, per-diem, in your currency (USD, CAD, GBP, AUD, NOK, EUR & more) • Hitch Log: a record of every hitch (dates, rig, overtime, per-diem) with a year summary; export it as a spreadsheet or PDF • Unlimited tickets in your wallet, each checked against your hitch • Pro widgets: a full-month rotation grid, and your next crew change beside this hitch's estimated pay • Export to Calendar: your next 12 months as all-day events in a calendar file to share, or to import into Google Calendar, Outlook or a partner's phone Buy Pro once and keep it. No subscriptions. No ads. Crew change shouldn't be this hard to track. Now it isn't.