دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The teeth of the bit can self-sharpening ,because its teeth be processed by special built-up welding .

n: The section of can supporting its up-stage stress and loss the ability of transporting up fluid column pressure.

scanning electron microscope.

a rig supported by attached pontoons.

n: a type of pipe-laying vessel with a submerged pontoon hull and an elevated work area. Semi-submersible lay vessels remain relatively steady in high seas and are used in areas where conditions are expected to be continually rough.

n: a welding technique in which the arc is maintained in a continuous stream of gas between an electrode and the pipe being welded. The semi- automatic welding apparatus consists of a spool of coiled wire that provides filler metal for the weld, a pair of driving rollers that guide the wire to the weld, a welding gun, and a supply of shielding gas. Each type of semiautomatic welding is usually identified by the type of shielding gas used;in CO2 wire welding, for example, carbon dioxide is the shielding gas.

n: a diving life-support system in which the gas is partially vented and the remainder is recycled, purified, and reoxygenated.

n: a tide having twohigh water levels and two low water levels per day.