دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The brake system of cable tool barrel.

n: voltage induced in the armature of a motor by the magnetic field in which it is turning. Also called counter emf. See electromotive force.

return flow from injection of a fluid into a formation.

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.

a flow control valve that provides some control when running or pulling a string.

n: The included angle between the table of PDC and the line paralleling bit axis.

a tool to enlarge a drilled hole.