دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a group of two or more particles held together by strong forces. Aggregates are stable with normal stirring, shaking, or handling;they may be broken by treatment such as ball milling a powder or shearing a suspension.

n: A group of two or more individual particles held together by strong forces. Aggregates are stable to normal stirring, shaking or handling as powder or a suspension. They may be broken by drastic treatment such as ball milling a powder or by shearing a sus

a shape of a reamer blade that allow milling either up or down.

n: a device made up in the drill stem above the mill to collect bits of junk ground away during a milling operation. During milling, drilling mud under high pressure forces bits of junk up the narrow space between the boot sub and hole wall. When the junk reaches the wider annulus above the boot sub and pressure drops slightly, the junk falls into the boot sub. A boot sub also can be run above the bit during routine drilling to collect small pieces of junk that may damage the bit or interfere with its operation. Also called a junk sub or junk boot.

a device run in the drill string just above the mill to catch cuttings.

n: a milling device attached to the bottom of washpipe that mills or drills debris accumulated around the outside of the pipe being washed over. Usually, a bum shoe has pieces of very hard tungsten carbide embedded in it. Also caned a rotary shoe. See washpipe.

n: A kind of milling and cutting tool operated by hydraulic power.

an overshot fishing tool with a bottom cutter surface to allow milling the top slips or all the slips prior to retrieving a packer.

n: 1. the point at which, in terms of temperature and pressure, a fluid cannot be distinguished as being either a gas or a liquid, i.e., the point at which die physical properties of a liquid and a gas are identical. 2. one of the places along die length of milling line at which strain is exerted as pipe is run into or pulled out of the hole.

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 powerful magnet placed in the return line between the wellbore and the mud pit to remove metal particles from the drilling mud. A ditch magnet is often used during milling operations.

n: A device used to aspirate the iron fillings and powers from the drill fluid when corrode or washover the junk

drilling, milling and under-reaming.