دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a flow-control device employing a ball with a rotating mechanism to open or close the tubing.

any of several valves that rotate a ball with a flow passage to allow or deny flow.

v: to use a ball mill to grind, polish, or pulverise metal or stone particles.

v: to plug open perforations by using ball sealers.

When using ball sealers, to effectively shut-off the entire zone and cause pressure to rise sharply.

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.

n: see ballast movement.

n: any shipboard tank or tanker compartment normally used for carrying saltwater ballast. When these compartments or tanks are not connected with the cargo system, they are called segregated ballast tanks or systems.