دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: the centre line of wellbore

n: the interspace between the wellbore and casing or drilling pipe

n: the curvature of space curve of wellbore

n: the amount a wellbore is deflected from vertical.

n: the phenomenon of wellbore enlarging because of hole sloughing caused by the types,characters of drilling fluid and improper measurement

n: the shape and size of the wellbore.

n: certain section of all wellbore ,namely the length or distance between two points or two depths

n: a device used to enlarge the size of an existing borehole. It has teeth arranged on its outside circumference to cut the formation as it rotates.

n: a special drilling tool that can enlarge an existing hole to the required diameter.

a larger device (usually of a fixed diameter) that enlarges the wellbore to a diameter equal to or less than the upper casing drift). Compare to an under-reamer or watermelon mill or string mill.

n: the weight of the drill stem that is suspended from the hook.

n: The total force pulling down on the hook. This total force includes the weight of the drillstring in air, the drill collars and any ancillary equipment, reduced by any force that tends to reduce that weight. Some forces that might reduce the weight includ

the actual weight of a pipe string measured at the surface;affected by buoyancy, friction and other factors in the wellbore.

n: the vertical distance between a point of wellbore and wellhead.