Calculating the perfect-well time

The following describes a technique that allows one to consistently calculate the physical limit for a particular drilling operation (and thus create well-cost estimates and identify opportunities for improvement) using a quick and simple technique that converts standard operational times and a specific energy to calculate the minimum time to drill an interval to a "perfect-well time." The perfect well time is a close approximation of the minimum time possible to drill a particular well, and can easily be calculated with a simple spreadsheet. Click here to enlarge imageTo define the "perfect well," engineers must step each hole interval through the process illustrated in the table. Note...

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