دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: Both ends are thick thread, used to connect joints with different thread and diameter.

n: a gas measurement device that consists of a mutiple-ported Pitot tube installed inside a pipe through which gas is flowing;it is installed perpendicular to the flow of gas. The length of the annubar is equal to the diameter of the pipe in which it is installed. An annubar senses the difference between total flowing pressure and static pressure;gas volume is calculated from this difference. See Pitot tube.

a gas flow rate measurement device using Pitot tubes. Common in pipelines.

n: Refers to eyeholes formed by mud desander in drilling operation.

the unobstructed opening size (diameter, length and width, or other shape factor).

n: The solid particle that can not pass the American NO.200 standard sieve, that is refered to the solid particle whose diameter is bigger that 74um.

n: The commercial artificial diamond. It is a ball composed by more or least radiated slender crystal of diamond. There is no obvious cleavage face. It has high abrasion resistance and mainly is used for manufacturing diamond tool.

v: in reference to tubing under the effects of temperature changes, sucker rod pumping, or high internal pressure, to increase in diameter while decreasing in length. Compare reverse-balloon.

an increase in pipe O.D. as internal pressure is applied (shortens pipe) or a decrease in diameter (Reverse Ballooning: lengthens pipe) as external pressure is applied.

small diameter hole made in the ground to obtain a sample for the purpose of searching for a gas leak in a pipeline.

n: a tool joint box which has been subjected to a torque which has resulted in permanent enlargement of the box diameter. This normally occurs adjacent to the box sealing shoulder.

a bit that, when rotated, drills a hole larger than its diameter.