دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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.

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.

barrels per day.

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

a soft metal alloy used in some seals and bearings.

v: the procedure whereby one threaded piece (such as a pipe) is unscrewed from another.

v: To disconnect a string of pipe by unscrewing one threaded piece from another.

unscrewing a tool or equipment. In pipe recovery, back-off of a joint precedes recovery of the upper section in a well. Common in plug and abandonment or sidetrack operations.

n: The pressure within a system caused by fluid friction or an induced resistance to flow through the system. Hydraulic Thru-Tubing Fishing tools are typically operated using back pressure created by fiow through a nozzle.

a pressure caused by a restriction or fluid head that exerts an opposing pressure to flow.