دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: After the drilling fluid gets to the bottom of the well through the drill column ,the fluid carries those cuttings out of the well,and when the cuttings removed the fluid run through the drill column to clear the wellbore,cool and lubricate the drill tool

n:1. intentional deviation of a wellbore from the vertical. Although well bores are normally drilled vertically, it is sometimes necessary or advantageous to drill at an angle from the vertical. Controlled directional drilling makes it possible to reach subsurface areas laterally remote from the point where the bit enters the earth. It often involves the use of deflection tools. 2. a technique of river crossing in pipeline construction in which the pipe is buried under the riverbed at very much greater than those of conventional crossings. With this technique, a hole in the form of an inverted arc is drilled beneath the river, and the made-up pipeline is pulled through it.

n: The intentional deviation of a wellbore in order to reach an objective some distance from the rig.

drilling the wellbore in a planned angle of deviation or trajectory.

n: an employee of a directional drilling service company whose main job is to help the driller at a well site keep the wellbore as close as possible to its planned course. Also called directional operator.

n: A specialist in directional techniques employed by an operator to ensure the target is reached.

n: a wellbore intentionally drilled at an angle from the vertical. See directional drilling.

n: During the process of drilling,the direction of deflection and the axis figure go forward according to anticipated design.

n: a logging method that records drift angle, or deflection from the vertical, and direction of the drift. A singleshot directional-survey instrument makes a single photograph of a compass reading of the drift direction and the number of degrees the hole is off vertical. A multi shot survey instrument obtains numerous readings in the hole as the device is pulled out of the well. See directional drilling.

n: A method of measuring the inclination and direction of the wellbore by using a downhole instrument. The well must be surveyed at regular intervals to plot its course accurately.

a measurement of the well path that records the inclination and azimuth of the wellbore using a compass or other device.

n: a tool that, when lowered into the wellbore, makes a photographic record of the angle and drift of the wellbore;that is, it records the number of degrees the hole is off vertical and the direction in which it is off vertical. Several types of instrument are available;some are capable of photographing only a single record - single-shot survey instrumentswhereas others are capable of making several records in one run - multishot survey instruments.

n: The dimensional position which the wellbore of directional well passes from the well head to bottom.

n: a line through which drilling mud travels from the mud pump to the standpipe on its way to the wellbore.

n: A high-pressure pipeline between the exit of drill pump and the standpipe

the volume of a wellbore occupied by fluid. When the swept volume varies from the calculated displacement, part of the wellbore may not be actively swept.

a reservoir drive mechanism in which dissolved gas from the crude oil breaks out of solution and provides energy to push the hydrocarbons toward the wellbore.