دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a powerful magnet placed in the return line between the wellbore and the mud pit to remove metal particles from the drilling mud. A ditch magnet is often used during milling operations.

n: A device used to aspirate the iron fillings and powers from the drill fluid when corrode or washover the junk

a sudden change in the direction of the wellbore. Generally based on degrees per 100 ft.

n: The elbow caused by a sharp change of direction in the wellbore.

n: 1. an abrupt change in direction in the wellbore, frequently resulting in the formation of a keyseat. 2. a sharp bend permanently put in an object such as a pipe, wire rope. or a wire rope sling.

n: The elbow caused by a sharp change of direction in the wellbore.

n: A measure of how quickly the wellbore changes direction, expressed in degrees (of total course change) per 100 or 30m of wellbore length.

n: a tool used to broaden the wellbore ,on whose body there are upper-line and lower-line gear wheels and in each line there are three gear wheels in symmetric offset spread

adj, adv: pertaining to the wellbore.

a general term referring to subsurface equipment, tools or other items.

any of a variety of downhole cameras, including full motion video, recording memory camera, sequence sending cameras, etc. Used to get a better picture of the wellbore or a fish.

n: the devices used to measure and record the downhole layer ,fluid property,state of the wellbore and some parameters relational with drilling

n: signals transmitted from an instrument located downhole to a receiving monitor on the surface-a surfacereadout instrument. Downhole telemetry may be transmitted via a special wireline or via mud pulse (much as radio signals are transmitted through the air). Frequently, downhole telemetry is employed in determining the drift angle and direction of a deviated wellbore. See measurement while drilling.

n: The process whereby signals are transmitted from a downhole sensor to a surface readout instrument. This can be done by a conductor line (as on steering tools) or by mud pulses (as in MWD tools (q.v.)).