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Unformatted text preview: ulated during drilling. 15 By closely monitoring well pressure, rig crews maintain the wellbore fluid pressure so that it is equal to or slightly greater than the pressures from the formation. This type of pressure balance is referred to as an “overbalanced” condition. By contrast, a well is in an “underbalanced” condition when the formation pressures exceed the wellbore drilling fluid pressures. Rig crews rely upon a number of indicators to track fluid pressures. 16 Operators routinely rely upon drilling mud suppliers to provide assistance with choosing an appropriate drilling mud. Drilling rig crews include “mudloggers” who monitor drilling mud, wellbore pressures, and other data. 16 This process of monitoring well pressures is referred to as “measurement while drilling.” Operators also routinely rely upon drilling mud suppliers to provide assistance with choosing an appropriate drilling mud and to provide “mudloggers” on the rig to monitor drilling mud, wellbore pressures, and other data. 15 15 Cementing is an important factor in well...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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