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UB: See Underbalance.
UBD: See Underbalance drilling.
UBI: Ultrasonic borehole imager.
UBO: Underbalance operations.
UCS: See Unconned compressive strength.
UIC: Underground injection control.
ULCC: See Ultralarge crude carrier.
Ultimate Customer: Customer that purchases energy for consumption and
not for resale. See End user.
Ultimate Potential: An estimate of recoverable reserves that will have been
produced by the time all exploration and development activity is completed;
includes production to date, remaining reserves, development of existing
pools, and new discoveries.
Ultimate Strength: The maximum stress that a material can w