دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: old-style tap with longitudinal grooves across the threads. See tap, taper tap.

n: A usual fishing tool for fishing tubular goods dropping in the wellbore. There are thread and coning in the inner surface.

another name for a tapered tap. Used to screw into boxed of connections.

v: 1. to unscrew one section of pipe from another section, especially drill pipe while it is being withdrawn from the wellbore. During this operation, the tongs are used to start the unscrewing operation. 2.to separate, as gas from a liquid or water from an emulsion.

n: 1. an obstruction in the borehole, usually caused by the caving in of the well or the borehole or by the intrusion of a large boulder.2.a tool placed in the hole to retain cement or other material;it may later be removed, drilled out, or left permanently.

n: An obstruction in the borehole, caused by a buildup of material such as scale, wellbore fill, or cuttings that can restrict wellbore access or, in severe cases, eventually close the wellbore . In open hole a bridge usually caused by the caving in of the w

a blockage in the wellbore caused by a mass of particles that lock together and prevent pipe movement or flow.

n: a phenomenon that sometimes occurs when a well blows out. Rocks, sand, clay, and other debris clog the hole and stop the blowout.

n: The wellbore blinding due to borehole wall sloughing.

n: The wellbore which is blocked by collapsed formation, cutting, or low-performance drilling fluid.

n: water that has a large quantity of salt, especially sodium chloride, dissolved in it;salt water.

n: Dissolving a great quantity of salt, especailly sodium chloride. Usually used to make up salt water drilling fluid.

a mixture of water and a soluble salt. Most common brines are sodium chloride NaCl, potassium chloride KCl and calcium chloride CaCl2. Brine densities may range from 8.33 to > 19 lb/gal (1 to >2.28 g/cc). The USGS definition of a brine is a salinity of mo

n: The inferior drill column bend since bit load produced by self-weight reach to definite value when drill column is in the wellbore. It is decided by bit load and deviation angle.

the part of the wellbore that is changing deviation, usually building toward a maximum deviation angle.

n: The rate at which drift angle is increasing as the wellbore is being deviated from vertical. Usually measured in degrees per 100 ft drilled.

n: That part of the wellbores trajectory where the drift angle is increasing.