دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. position of the rigs weight indicator where hook load is zero.2. position of an engines transmission when the engines flywheel or other power transmission device is not being turned by the engine.

n: a packer that, unlike compression or tension packers, requires neither set-down weight nor ups train pull to remain set.

n: the fluid heavy weight additive that without magnetic.

n: see oil-bath air cleaner. oil-bath reservoir n: in rotary table assemblies, a compartment in the base of the rotary table assembly that contains oil of a specified weight and viscosity and through which parts of the assembly move to be lubricated.

n: under any speed or tooth wear , the bit pressure gained under the condition of lowest drilling cost .

n: a graduated plumb bob that is attached to a metal gauge tape and that is of sufficient weight to keep the tape taut.

n: the strata of rock that over-lie the stratum of interest in drilling.

n: the layers of rock lying above a particular formation.

the sediment weight pressing down on the formation. Usually about 1 psi/ft.

n: a hole whose diameter is larger than the diameter of the bit used to drill it. An overgauge hole can occur when a bit is not properly stabilised or does not have enough weight put on it.

n: the well its diameter exceeds the diameter of bit.

v: to pull on pipe with enough force to exceed the pipes weight.

n: pull on pipe over and beyond its weight in either air or fluid.

the load applied when pulling equipment that is in excess of the actual string weight.

n pl: the number of times the drilling line is passed (reeved) between a rigs crown block and its traveling block. Typically, a line may have from four to 12 parts. In the case of a four-part line, the line is passed two times between the crown and travelling blocks;a 12-part line is passed six times between the two blocks. The greater the number of parts, the more weight the line able to support. Also called falls.