Drilling Formulas and Drilling Calculations

Practice to drill the well at near balance condition in conjunction with well control precaution

In some situation, where you drill with mud weight that is very close to balance condition (near formation pressure) and you don’t have much room to weight up due to fracture gradient limitation, from the well control perspective, you may need to drill one stand, then circulate bottom up and perform flow check. If everything is static, you can go ahead and drilling. Moreover, you need to look at the peak gas after going back to drill because it indicates how well of mud weight is. If you don’t see any gas peak, it means that your mud weight at the static condition is good. However, if you see any gas peak while drilling but it does not come from formations that you are drilling, this situation indicates that you don’t have or just enough mud weight to control the well in the static condition. You can check where the gas coming from by using a lag stroke calculation.

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Trip Margin Calculation

By DrillingFormulas.Com | January 26, 2011 - 9:42 am |August 9, 2011 Applied Drilling Calculations, Oil Field Knowledge, Well Control Formulas

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Trip margin is an increment of drilling mud density to provide overbalance so as to compensate the swabbing effect while pulling out of hole.

You can quickly calculate how much trip margin required by this following simple equation.

Trip Margin = Mud Yield Point ÷ [11.7 x (Hole diameter – Drill pipe diameter)]

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Mud Up Calendar Rotational Planner Sheet for Oilfield Personnel

By DrillingFormulas.Com | January 25, 2011 - 9:38 am |July 8, 2024 Uncategorized

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Are you an oilfield worker struggling to keep track of your time on and off the rig? Look no further! This is a free Rig Schedule Planner which will help you. This powerful tool is designed specifically for oilfield professionals working common rotations like 7/7, 14-14, 21/21, and 28/28 schedules.

Why should you download the Rig Schedule Planner, simply called Mud up schedule?

Tailored for oilfield workers: Unlike generic calendar apps, our planner is built with your unique needs in mind, supporting the most common offshore rotation patterns.
User-friendly interface: This file is very simple to use, ensuring you can plan your schedule effortlessly without any complicated setup or learning curve.
Compatibility: This planner works seamlessly with the latest versions of Microsoft Excel, guaranteeing smooth operation on your desktop or laptop computer.
Absolutely free: This valuable file can be downloaded at no cost.
Improved work-life balance: By clearly visualizing your on and off periods, you can better plan your personal life, family time, and vacations around your work commitments.
Increased productivity: With a clear overview of your schedule, you can optimize your time both on and off the rig, leading to improved efficiency and job satisfaction.