دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: The inferior drill column bend since bit load produced by self-weight reach to definite value when drill column is in the wellbore. It is decided by bit load and deviation angle.

n: When the pressure suffered by inferior drill column reach to critical value, it deviates the vertical axis and forms a tangency point with borehole face.

n: If bit load continues increasing after buckling of first order, bending shape will change piecemeal and tangency point will move downward.

the point in the well or the weight applied where the pipe buckles (sinusoidal bending) and stops or significantly slows during pipe running in a horizontal well.

n: bending of pipe that may occur because of hole deviation. Pipe may bend because of the angle of the hole or because of an abrupt deviation such as a dogleg.

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

the compression load that initiates buckling in the pipe.

a buckling characterized by maximum wall contact. Takes the form of a wound spring.

a repeating shape like a sine wave. May be applied to pipe buckling.