دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the pressure exerted by a specific number of molecules contained in a specific volume (usually I cubic foot) at a specific temperature. Base pressure is a factor used in calculating gas volume. Standard base pressure varies from state to state. In Texas, for example, base pressure is 14.73 psia at 6().F. In Louisiana, base pressure is 15.025 psia at 6()ﾰF. base price II: the value of natural gas, usually at the wellhead, before any imposition of taxes, gathering, compression, or other charges, as stated in a gas sales contract. basicity II: pH value above 7 and the ability to neutralise or accept protons from .:ids.

n: igneous or metamorphic rock, which seldom contains petroleum. Ordinarily, it lies below sedimentary rock. When it is encountered in drilling, the well is usually abandoned.

unproductive rocks, usually igneous or metamorphic, at the bottom of a sedimentary rock sequence.

n: a device placed in the drill or work string that catches debris when a drillable object is being milled or drilled downhole.

n: an expandable, cylindrically shaped gripping mechanism that is fitted into an overshot to retrieve fish from the borehole. See grapple.

a device used to catch debris in the wellbore. Often a part of the string.

n: a fishing accessory run above a bit or a mill to recover small, nondrillable pieces of metal or junk in a well.