دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a theory of acoustic propagation in porous and elastic media that taken into account fluid behaviors.

n: transverse or longitudinal seismic waves transmitted in the interior of an elastic solid or fluid and not related to a boundary surface.

the deformation of pipe in compression as it moves from straight to sinusoidal to helical shapes in the hole. Usually in the elastic range.

n: see modulus of elasticity .

n: wave in an elastic medium that causes an element of the medium to change volume without rotating.

n: the buckling of tubing in a large-diameter pipe or casing.

compressional deformation of tubulars to the point where the tubing resembles a corkscrew. The condition may be temporary if the metal is not yielded past the elastic recovery point. Tubulars that are corkscrewed may be pumped through but will stick most

n: a spherical or cylindrical object that is a component part of a pipe prover that moves through the prover pipe. The displacer has an elastic seal that contacts the inner pipe wall of a prover to prevent leakage. The displacer is made to move through the prover pipe by the flowing fluid and displaces a known measured volume of fluid between two fixed detecting devices.

non-permanent structural deformation during which the amount of deformation (strain) is proportional to the applied stress (load).

n: a collision between a neutron and the nucleus of an atom of an element such as hydrogen. In such a collision, the neutrons energy is reduced by exactly the amount transferred to the nucleus with which it collided. The angle of collision and the relative mass of the nucleus determine energy loss.

n: temporary changes in dimensions caused by stress. The material returns to the original dimensions after removal of the stress.

n: the deformation of caused by the effect of overlying-strata pressure which is standed by the rock in the range of elastic limit

deformation of a body in the elastic range, i.e., recovery to the initial shape is possible when the stress or load is removed.