دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a rock of biochemical origin, composed largely of calcium phosphate from bird droppings and vertebrate remains.

n: a device used to determine the angle and direction by which a wellbore deviates from the vertical. After the instrument is run into the hole, it takes a photograph that is then brought to the surface, developed, and analysed. Photographic survey instruments can be single-shot or multishot and magnetic or gyroscopic.

n: oxidation introduced by sunlight;a very slow process that helps to break down hydrocarbons exposed to sunlight into other components and, eventually, into carbon dioxide and water.

n: (OSHA) a chemical for which there is scientifically valid evidence that it is a combustible liquid, a compressed gas, explosive, flammable, an organic peroxide, an oxidizer, pyrophoric, unstable (reactive),or water reactive.

a log-log plot of resistivity (x-axis) vs. porosity. Helps determine which zones contain hydrocarbon.

n: a cylindrical or spherical device that is affixed to the end of a wireline just above the hook to keep the line straight and to provide weight. v: to soak metal pieces in a chemical solution to remove dirt and scale from the metals surface.

a chemical treatment of the tubulars to remove pipe dope, mill scale and mud or cement residue.

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.

n: a gelled viscous fluid placed at a specific depth in the well. usually to overcome or minimise a problem at that depth. For example. a special bentonite pill may be spotted (placed) at or near a formation to which drilling fluid is being lost. The pill may seal the formation and reduce or stop the lost circulation problem.

n: a relatively small volumn of specially prepared fluid placed or circulated in the wellbore. Fluid pills are commonly preparedfora variety of special functions, such as a sweep pill prepared at high viscosity to circulate around the wellbore lost-circulati

a volume of gelled fluid mixed for a specific purpose. A fluid loss pill for example.

n: in pipeline construction. the hole drilled as the first step of a directionally drilled river crossing. It establishes a pathway for the pipeline.

n: a small-diameter hole that is later opened up to the required diameter. Sometimes used in directional drilling to control wellbore deviation during kick-off.

a small (sometimes) diameter hole drilled through a pay zone to determine the pay top and bottom or various contacts, before the main well position is selected. May also use a pilot hole to better control influx rate.

n: the machined extension on the very end of the bearing pin that fits into the nose of the cone of a roller cone bit.

n: the extended part of shaft neck of cone bit, coordinated with conr taper top.