دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a centrifugal device for removing very fine particles, or silt, from drilling fluid to keep the amount of solids in the fluid at the lowest possible point. Usually, the lower the solids content of mud, the faster is the rate of penetration. The desilter works on the same principle as a desander. Com- pare desander.

n: A hydrocyclone with an inside diameter less than 6 inches. It can remove a large fraction of solids larger than 15–20 microns.

n: a contact closure change, or other signal, that starts or stops a prover counter/timer and defines the calibrated volume of the prover.

n: in lubricating oils and in some engine fuels, a chemical that is added to the oil or to the fuel that suspends dirt, carbon, and other foreign matter in the oil or fuel. As a result of the detergents in motor oil, the oil will very quickly appear dirty because it is suspending the particles.

an estimate using a single number value. It does not account for ranges in value or probability of occurrence for the parameter.

n: The well whose wellbore deviates from vertical orientation and exceeds deviation angle required by straight hole.

n: See deviated hole.

a well with an inclination other than zero degrees from vertical. In practice, deviated wells are usually more than about 10o from vertical.

n: A wellbore that is not vertical. The term usually indicates a wellbore intentionally drilled away from vertical.

n: departure of the wellbore from the vertical, measured by the horizontal distance from the rotary table to the target. The amount of deviation is a function of the drift angle and hole depth. The term is sometimes used to indicate the angle from which a bit has deviated from the vertical during drilling. See drift angle.

n: The angle at which a wellbore diverges from vertical. Wells can deviate from vertical because of the dips in the beds being drilled through. Wells can also be deliberately deviated by the use of a whipstock or other steering mechanism. Wells are often dev

actual term is inclination - the angle from vertical in a section of a well.

n: A kind of cone bit with no offset, opened outer teeth guidance. Used for drilling vertical well and directional well.