دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. the process of lowering the drill stem into the wellbore when the well is shut in on a kick and when the weight of the drill stem is sufficient to overcome the force of well pressure. 2. the process of putting tubing into a well under pressure.

v: shutting in and stripping in when well blowout .

the number of rod strokes per minute of the beam ift unit. Set by depth, viscosity of fluid, gas content, weight of fluid supported, etc.

n: a method of artificial lift in which a subsurface pump located at or near the bottom of the well and connected to a string of sucker rods is used to lift the well fluid to the surface. The weight of the rod string and fluid is counterbalanced by weights attached to a reciprocating beam or to the crank member of a beam pumping unit or by air pressure in a cylinder attached to the beam.

n: a deviation of natural gas from Boyles and Charless laws for ideal gas. Natural gas is not an ideal gas in that it is a mixture of several gases. As the pressure increases, the volume of space that a given weight of natural gas would occupy becomes increasingly smaller than the volume calculated by application of Boyles and Charless laws.

n: a tanker with a capacity over 100,000 deadweight tons (90,720 dead weight tonnes). Supertankers with a capacity larger than 100,000 deadweight tons but less than 500,000 deadweight tons (45,360 deadweight tonnes) are called very large crude carriers. Those with a capacity over 500,000 deadweight tons are called ultralarge crude carriers.

n: 1. in a flowing stream of water, the finer sand, silt, and clay that are carried well off the bottom by the turbulence of the water. Compare bed load, dissolved load. 2. the weight of the drill stem when suspended from the hook.

n: a rotary tool that is hung from the hook and the traveling block to suspend and permit free rotation of the drill stem. It also provides a connection for the rotary hose and a passage- way for the flow of drilling fluid into the drill stem.

n: A mechanical device that must simultaneously suspend the weight of the drillstring, provide for rotation of the drillstring beneath it while keeping the upper portion stationary, and permit high-volume flow of high-pressure drilling mud from the fixed por

n: Chemical extracted from the bark of trees and used as clay deflocculant in water muds. Tannins are moderate molecular weight, anionic polymers with complex structures. Quebracho is a tannin.

n: A string of casing that consists of two or more sizes or weights.

n: A string of drill collar that consists of two or more sizes or weights.