دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a reaction in which an element has been changed into an unstable isotope during bombardment by neutrons.

n: a wireline instrument for measuring bottomhole temperature or pressure. It contains a clock-driven recording section and either a pressure element or a temperature element. It is thin enough to pass downhole through small tubing.

n: a thick-walled container, usually steel, used to hold devices that determine and record pressure or temperature in a wellbore. See bonomhole pressure.

a thick walled pressure container of pressure measuring instruments or a sample container.

n: a device set in a tubing coupling to facilitate the landing of pressure bombs (recorders).

hanger for bottom-hole pressure recorder (bombs).

n: 1. the pressure at the bottom of a borehole. It is caused by the hydrostatic pressure of the wellbore fluid and, sometimes, by any back-pressure held at the surface, as when the well is shut in with blowout preventers. When mud is being circulated, bottomhole pressure is the hydrostatic pressure plus the remaining circulating pressure required to move the mud up the annulus. 2. the pressure in a well at a point opposite the producing formation, as recorded by a bottomhole pressure bomb.

n: The pressure at the bottom of the borehole, or at a point opposite the production formation.

n: a pressuretight container (bomb) used to record the pressure in a well at a point opposite the producing formation.

n: an instrument to measure bottomhole pressure. Also called bottomhole pressure bomb.

compensated neutron log. Radioactive neutron source bombards the formation with high energy neutrons, which are slowed and captured by atoms of the formation. The low energy neutrons are reflected back to the tool and counted. The amount of neutrons retur

n: Schlumberger/Anadrill LWD tool that bombards the formation with fast neutron. Detectors measure the slowed neutrons that are bounced back by Hydrogen atoms. Used to deduce porosity, lithology, clay analysis, and gas detection.

n: equipmenting bomb stock and transportation on the rotary rig in order to be convenient for explosive drilling