دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: crotch that the roughneck uses to grasp the drilling volume when triping.

n: 1. an accurately calibrated, usually U-shaped, pipe used to check, or prove, the accuracy of a meter on a LACT unit or other oil measuring installation. 2. a type of continuous-flow volumetric prover comprising a length of pipe from which a known volume is displaced by a displacer to or from a meter being proved at normal operating conditions.

n: 1. (obsolete) a worker who places pipe to one side in the derrick. 2. a pneumatic or hydraulic device often used on drill ships that, on command from an operator, either picks up pipe from a rack and lifts it into the derrick or takes pipe from out of the derrick and places it on the rack. It eliminates the need to stand pipe in the derrick or mast while it is out of the hole, which is desirable for maintaining the vessels centre of gravity as low as possible and for minimising the possibility of capsizing.

n: see tower hand.

n: the maximum load of pipe setback that the force enforced by the drilling volume on it.

n: the volume of gas in a pipeline.

n: a cylindrical sliding piece that is moved by or that moves against fluid pressure within a confining cylindrical vessel.

n: the actual volume displaced by a piston in a cylinder as it moves from the beginning of the compression stroke to the end of it.

n: an increase in the average level of mud maintained in each of the mud pits, or tanks. If no mud or other substances have been added to the mud circulating in the well, then a pit gain is an indication that formation fluids have entered the well and that a kick has occurred.

n: when drilling belt of transition or high pressure , the fluid in layer equivalent displaces the fluid in the annular, thus arises the volume of mud pool increasing.