دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a partial restriction, generally a plate, placed to change the direction, guide the flow, or promote mixing within a tank or vessel. 2. a device that is seated on the bit pin, in a tool joint, or in a drill pipe float, to centralize the lower end of a go-devil while permitting the bypass of drilling fluid.

n: A replaceable metal ring inserted in the BHA (q.v.) to act as a landing collar for a survey tool.

n: 1. a device that is inserted into a pipeline for the purpose of cleaning;a line scraper. Also called a pig. 2. a device that is lowered into the borehole of a well for various purposes such as enclosing surveying instruments, detonating instruments, and the like. v: to drop or pump a device down the borehole, usually through drill pipe or tubing.

n: a device that is dropped down a borehole,usually through the drill pipe or tubing.

n: 1. a scraping tool that is forced through a pipeline or flow line to clean out accumulations of wax, scale, and debris from the walls of the pipe. It travels with the flow of product in the line. cleaning the pipe walls by means of blades or brushes affixed to it. Also called a line scraper or a go-devil. 2. a batching cylinder with neoprene or plastic cups on either end and used to separate different products travelling in the same pipeline. 3. a neoprene displacement spheroid, automatically launched and received. used to displace liquid hydrocarbons from natural gas pipelines. 4. in hydro- static testing of a pipeline. a scraper used inside the line to push air out ahead of the test water and to push water out after the test. v: to force a device called a pig through a pipeline or a flow line for the purpose of cleaning the interior walls of the pipe. separating different products. or displacing fluids.

a flow line clearing device, pumped through the line with normal flow.