دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

compaction of a zone (vertical height shrinkage) created by compaction of the matrix after some load supporting fluids have been produced.

n: A shot section of pipe ,tubing ,or drill pipe run into a hole.

n: the foundation on which the derrick or mast and usually the draw- works sit. It contains space for storage and wellcontrol equipment.

a downhole safety valve designed to close when the flow rate reaches a preset level as measured by a pressure drop across a valve.

n: the environment below the surface of the earth;groundwater, deep water, underground formations, etc. subsurface geology n: the study of rocks that lie beneath the surface of the earth. subsurface safety valve n: see tubing safety valve.

n: a procedure in which a bottomhole sampler is lowered into the well and filled with a sample that is representative of the reservoir conditions and that contains all the constituents of the fluid in their true proportions. Tests run on this sample help to obtain an accurate knowledge of the physical properties of the reservoir fluid under actual conditions.

n: a special steel pumping rod. Several rods screwed together make up the mechanical link from the beam pumping unit on the surface to the sucker rod pump at the bottom of a well. Sucker rods are threaded on each end and manufactured to dimension standards and metal specifications set by the petroleum industry. Lengths are 25 or 30 feet (7.6 or 9.1 metres);diameter varies from 0.5 to 1.5 inches (12 to 30 millimetres). There is also a continuous sucker rod (trade name: CorodTM).

a string or solid or hollow tubular that is moved by a pump jack at the surface to operate a rod pump at the bottom of the well.

n: an internally threaded fitting used to join sucker rods.

n: the downhole assembly used to lift fluid to the surface by the reciprocating action of the sucker rod string. Basic components are barrel, plunger, valves, and hold-down. Two types of sucker rod pumps are the tubing pump, in which the barrel is attached to the tubing, and the rod, or insert, pump, which is run into the well as a complete unit.