دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

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: Surveyor hired by the operator to run survey tools in the hole.

n: the angle at which a wellbore deviates from the vertical, expressed in degrees, as revealed by a directional survey. Also called angle of deviation, angle of drift, and inclination. See directional survey.

n: refer to hole deviation angle

directional survey.

n: a device used to detem1ine direction and angle at which a wellbore is drifting off the vertical. Unlike magnetic surveying instruments, a gyroscopic instrument reads true direction and is not affected by magnetic irregularities that may be caused by casing or other ferrous metals. See directional drilling, directional survey.

n: a kind of inclinometer used to measure the angle of inclination ,angle of orientation using the orientation-keeping ability of the top

n: a directional survey that provides a record of drift angle and direction at various depths in the hole. See directional survey.

n: A technique for determining the deviation of a wellbore. The multishot tool provides more accuracy than the single-shot tool and is usually used in highly deviated wells.

n: a directional survey that uses measurement-while-drilling techniques to detem1ine drift angle and azimuth.

n: 1. a charge of high explosive, usually nitroglycerine, detonated in a well to shatter the formation and expedite the recovery of oil. Shooting has been almost completely replaced by formation fracturing and acid treatments. 2. a point at which a photograph is made in a single-shot survey. See directional survey.

n: It can measure the angle of inclination and azimuth of a point in the borehole.