دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. (nautical) a volume measure equal to 100 square feet applied to mobile offshore drilling rigs. 2. a measure of weight equal to 2,000 pounds. 3. (metric) a measure of weight equal to 1,000 kilograms. Usually spelled tonne."

n: Large-capacity, self-locking wrenches used to grip drillstring components and apply torque.

n: the part of the tongs that extends behind the tong jaws, and to which the jaws are attached. A snub line is attached to the end of the tong arm to prevent the tong from turning too far when it is being used to make up, break out, or back up pipe.

n: The cylinder with heavy object,which be used to adjust the position of tong.

n: a weight placed in the derrick or under the rig floor that is attached by means of wire rope to the tong hanger. Each set of tongs has a counterbalance to ensure that they hang at a convenient height above the rig floor.

n pi: very hard and brittle pieces of serrated steel that are installed in the tongs and that grip or bite into the tool joint of drill pipe when the tongs are latched onto the pipe.

n: The toothing hard and brittle bloom that have been thermal treated,which be fixed in the tong.

n: a relatively long narrow steel projection bolted to the tong arm to which wire rope is attached;suspends the tongs in the derrick.

n: on a set of tongs, one of two hinged devices that crew members latch around elements of the drill stem to make up or break out such elements. Tong jaws normally have replaceable serrated inserts (dies) to grip the pipe.

n: The sheave that be used to hang wire rope of tong.

n: The operation that screwing tightly the thread of drill string or casing by tong.