Diamond Core Drill Manufacturers Association - translation to ρωσικά
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Diamond Core Drill Manufacturers Association - translation to ρωσικά

DRILL SPECIFICALLY DESIGNED TO REMOVE A CYLINDER OF MATERIAL
Core bit; Core bits; Drill core; Diamond core drill; Core Drill; Core drilling

Diamond Core Drill Manufacturers Association      

нефтегазовая промышленность

Ассоциация производителей оборудования для алмазного бурения

core drill         
1) колонковый бур
2) грунтонос
core drill         

строительное дело

колонковый бур

грунтонос

нефтегазовая промышленность

станок для колонкового бурения

Ορισμός

Национальная ассоциация промышленников
(НАП; National Association of Manufacturers)

крупнейшая организация монополистов США. Основана в 1895. Объединяет около 30 тыс. фирм (1973), включая наиболее могущественные концерны страны. НАП играет большую роль в системе политической и общественной жизни США. Руководящие органы НАП состоят из Совета директоров, президента, группы постоянных, региональных и почётных вице-президентов, а также около 20 постоянных комитетов, анализирующих и разрабатывающих рекомендации по многим вопросам и проблемам, входящим в сферу непосредственной деятельности государственного аппарата США (внешняя политика, экономическое положение страны и прогнозирование, международная экономическая деятельность, социальные изменения внутри страны, связь с общественностью и пути воздействия на неё, профсоюзы и рабочее движение, налогообложение и др.). Штаб-квартира НАП находится в Нью-Йорке; под её руководством действует ряд региональных центров ассоциации.

Βικιπαίδεια

Core drill

A modern core drill is a drill specifically designed to remove a cylinder of material, much like a hole saw. The material left inside the drill bit is referred to as the core.

Core drills used in metal are called annular cutters. Core drills used for concrete and hard rock generally use industrial diamond grit as the abrasive material and may be electrical, pneumatic or hydraulic powered. Core drills are commonly water cooled, and the water also carries away the fine waste as a slurry. For drilling masonry, carbide core drills can be used, but diamond is more successful when cutting through rebar.

The earliest core drills were those used by the ancient Egyptians, invented in 3000 BC. Core drills are used for many applications, either where the core needs to be preserved (the drilling apparatus used in obtaining a core sample is often referred to as a corer), or where drilling can be done more rapidly since much less material needs to be removed than with a standard bit. This is the reason that diamond-tipped core drills are commonly used in construction to create holes for pipes, manholes, and other large-diameter penetrations in concrete or stone.

Core drills are used frequently in mineral exploration where the coring may be several hundred to several thousand feet in length. The core samples are recovered and examined by geologists for mineral percentages and stratigraphic contact points. This gives exploration companies the information necessary to begin or abandon mining operations in a particular area.

Before the start of World War Two, Branner Newsom, a California mining engineer, invented a core drill that could take out large diameter cores up to 16 feet in length for mining shafts. This type of core drill is no longer in use as modern drill technology allows standard drilling to accomplish the same at a much cheaper cost.

Core drills come with several power choices including electric, pneumatic, and hydraulic (all of which require power sources, such as a generator).

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