دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. in directional drilling, the direction of the wellbore or of the face of a deflection tool in degrees (0-359") clockwise from true north. 2. an arc of the horizon measured between a fixed point (such as true north) and the vertical circle passing through the centre of an object.

n: Reflecting the direction of wellbore deflection.

in a horizontal plane, it is the angle (measured clockwise) of well path departure usually from true or magnetic north. It may also be expressed as the compass direction of the path of the well bore as measured by a borehole survey. (Note: check the speci

n: A factor reflecting wellbore deflection. It is defined as the included angle between the north and the projection of tan of survey point in the level.

n: see riser angle indicator.

abbr: bottom of ;used in drilling reports.

an outside annulus, one out from the A annulus, usually production casing x production casing or surface casing. (Note, there may be regional differences in the A, B, C annulus designations)

seldom used name for a SSSV profile.

n: a liquefied hydrocarbon product composed chiefly of butanes and pr0- pane. If it originates from a refinery, it may also contain butylenes and propylene.

n: See bourdon tube case.

n: metal alloy, either tin-based or lead-based, used primarily in friction bearings.

a soft metal alloy used in some seals and bearings.