دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a clause in an oil or gas lease that excludes, or releases, unproductive formations from the lease at the end of a specified period.

n: a cylindrical separator standing up- right, perpendicular to the ground.

n: a pre-established location in the vertical plane along the tank shell couesponding to a given horizontal station. Compare horizontal station.

n: (VSM) an Hshaped device that supports a pipeline above the ground. Vertical support members are used in parts of the world where frozen earth prevents normal burial of the line. See lowering-up.

n: a large oil company that is involved in all aspects of the oil industry, from exploration and production to transportation and refining.

n: (VLCC) a supertanker whose capacity is larger than 100,000 deadweight tons (90,720 deadweight tonnes) but less than 500,000 deadweight tons (453,600 deadweight tonnes). Compare ultralarge crude carrier.

n: a container used as a structural envelope to provide for functions that include storage, settling, separation, and filtration for liquid and/or vapor.. Conditions of vessel use include atmospheric and elevated pressures and temperatures.

n: (VEF) a calculated factor, based on the experience of recent voyages, that reflects the average difference between vessel and shore measurements in terms of percent.

n: 1. a device, positioned in the drill stem between the bit and the drill collars, that absorbs impact loads and vibration from the up-and-down motion of the drill stem. Vibration dampeners are designed to transmit torque while absorbing reciprocative loads that decrease the efficiency of the drill bit. Also called a Shock Sub. 2. a device affixed to an engine crankshaft to minimize stresses that result from torsional vibration of the crankshaft. vibration error n: the maximum change in operating output, at any measured value within a specific range, when vibration levels of specified amplitude and range or frequencies are applied to the transducer along specified axes.

n: The tool can decrease the vertical and rotary shock vibration coming from bottomhole .