دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a sand control technique coupling fracture treating (usually a tip screenout fracture) with a screen and gravel packing of the wellbore.

the loading of proppant per square foot after the fracture has been placed. Commonly between 4 and 16 lb/ft2 of fracture face.

the width of a fracture at the wellbore. Hydraulic frac width is generated by frac fluid viscosity and/or pump rate (i.e., horsepower).

n: shortened form of formation

a stimulation method involving injection of fluid into the well at a high enough pressure to break the rock. Fracturing “failure” of the rock is a tensile failure as the wellbore in enlarged by pressure.

n: an area or point above the point at which a tubular, such as drill pipe, is stuck in the wellbore.

n: the depth at which pipe is struck, or more specifically the depth immediately above the point at which pipe is stuck.

a technique for estimating the highest free point in a string of stuck pipe. It is based on a differential stretch calculation with amount of pull and the free point constant (FPC).

n: a device run on wireline into the wellbore and inside the fishing string and fish to locate the area where a fish is stuck. When the drill string is pulled and turned, the electromagnetic fields of free pipe and stuck pipe differ. The freepoint indicator is able to distinguish these differences, which are registered on a metering device at the surface.

n: pipe or column which can not move down and up and turn because wellbore fall scraps amassed around pipe or other reasons.

abbr: foot-pound.

n: hole which is caused by oversize bit.



a wellbore drilled with a full gauge bit (maintained initial diameter).

n: a wellbore drilled with a full-gauge bit. Also called a true-to-gauge hole.