دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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.

v: to tighten up a threaded connection (such as two joints of drill pipe).

v: To tighten up a threaded connection.

to tighten a connection.

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: a method of pairing two persons for their mutual aid or protection. The buddy system is used to ensure that each crew member is accounted for, particularly in situations where hydrogen sulphide may be encountered.

n: any substance or combination of substances that, when dissolved in water, produces a solution that resists a change in its hydrogen ion concentration with the addition of acid or base.

a chemical used to keep the pH in a certain range without extremes of high or low pH.