دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pI: the fragments of rock dislodged by the bit and brought to the sulphur in the drilling mud. Washed and dried cuttings samples are analysed by geologists to obtain information about the formations drilled.

n: Small pieces of rock, cement, or steel that break away due to the action of the bit, milling, cutting, or underreaming tools.

chips of rock from the drilling process. They are circulated to the surface by the mud and separated in the screens and shaker. They are useful for identifying and correlating the formation.

n: a kind of enlarger equipped with Scalable erasing knifes

n: refer todrilling-type hole opener

n: refer to drilling-type hole opener

n: a tool used to enlarge the diameter of bare hole under the casing
and it shrinks when descent down hole while extendes under the fluid pressure and shrinks again when stop the pump

n: a method of well completion in which a slotted or perforated liner, often wire-wrapped, is placed in the well and surrounded by gravel. If open hole, the well is sometimes enlarged by underreaming at the point where the gravel is packed. The mass of gravel excludes sand from the wellbore rot allows continued production.

n: a tool that open hole through casing under the control of hydraulic pressure.

v: to enlarge the wellbore below the casing.

n: To enlarge a wellbore past its original drilled size. Underreaming is sometimes done for safety or efficiency reasons. Some well planners believe it is safer to drill unknown shallow formations with a small-diameter bit, and if no gas is encountered, to t

n: a device used to underream. See underream.

n: The tool that be used to enlarge the diameter of borehole for tripping in casing easily.