دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the part of a groove on the drawworks drum that changes direction. Grooves run parallel to each other, except in the angle-control section, where each groove is machined at a slight angle. This angled part of the groove causes the wire rope being spooled onto the drum to change direction so that the next wrap of rope on the drum lies in between the wraps of rope already on the drum. Also called a crossover section.

n: R-SO3-M (R is alkyl, M is cation),a kind of anionic surface active agent, mainly used as foaming agent of foam drilling fluid, for example alkane sulfonate.

system 11: a type of tap sampling system found on liquid storage tanks. The permanently installed taps on the out- side of the tank are attached to pipes and a floating boom inside the tank that rises and falls with the liquid level.

a low to moderate strength centralizer formed by arched spring-like straps of metal.

n: a vertical cylindrical vessel in which bubble caps and bubble-cap trays are arranged.

n: a perforated steel tray on which bubble caps are mounted. Bubble caps and trays are arranged in bubble towers, cylindrical vessels set vertically. See sieve tray. valve tray.

n: I. a subsurface hydrocarbon trap that has the features of both a structural trap and a stratigraphic trap. 2. a combination of two or more structural traps or two or more stratigraphic traps.

a trap that has both structural and stratigraphic character.

n: the first of several wraps of wire rope around the drawworks drum that will never be played out (unspooled) as the rope moves off the drum.

n: The first rope twisted in the drum spool.

n: a dome or anticlinal fold in which a mobile plastic core has ruptured the more brittle overlying rock. Also called piercement dome.

a salt or other column that pierces upper layers and may form traps of obstructions to flow.