دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A formation pressure that is higher than the normal formation fluid hydrostatic pressure.

n: pressure exceeding or falling below the pressure to be expected at a given depth. Normal pressure increases approximately 0.465 pow1ds per square inch per foot of depth or 10.5 kilopascals per metre of depth. Thus, normal pressure at 1,000 feet is 465 pounds per square inch;at 1,000 metres it is 10,500 kilopascals. See pressure gradient.

n: A formation pressure that deviates from the normal formation fluid hydrostatic pressure. Such pressure may be classified as "subnormal" (lower than normal) or "overpressured" (higher than normal).

n: The abnormal pressure per meter in depth, usually express as MPa/m. It is the reference
of density of the mud and the procedure of the casing design.

a pore pressure higher than a column of sea water for that true vertical depth.

n: a procedure whereby a product may be subjected to intensified but controlled conditions of heat, pressure, radiation, or other variables to produce, in a short time, the effects of long- time storage or use under normal conditions.

n: The total time from beginning of the accident to the normal situation.

adj: requiring free atmospheric oxygen for normal activity.

n: a group of two or more particles held together by strong forces. Aggregates are stable with normal stirring, shaking, or handling;they may be broken by treatment such as ball milling a powder or shearing a suspension.

n: A group of two or more individual particles held together by strong forces. Aggregates are stable to normal stirring, shaking or handling as powder or a suspension. They may be broken by drastic treatment such as ball milling a powder or by shearing a sus

n: diving in which a diver uses a normal atmospheric mixture of oxygen and nitrogen as a breathing medium. It is limited to depths less than 190 feet (58 metres) because of the dangers of nitrogen narcosis;however, dives with bottom times of 30 minutes or less may be conducted to a maximum of 220 feet (67 metres).

n: the distance from the normal level of the sea surface to the bottom of the hull or base of an offshore drilling platform or rig.

n: The distance from normal sea level to drill platform when marine drilling.

the clearance between the highest water surface that occurs during the extreme environmental conditions and the underside of the deck.