core drill

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core drill

[′kȯr ‚dril]
(mechanical engineering)
A mechanism designed to rotate and to cause an annular-shaped rock-cutting bit to penetrate rock formations, produce cylindrical cores of the formations penetrated, and lift such cores to the surface, where they may be collected and examined.

core drill

A drill used to remove a sample of rock in situ, for determining bedrock profiles or for obtaining a core for testing; the sample is retained in the core barrel.
References in periodicals archive ?
In this work, an intensive experimental study on the wear rate of the sintering diamond thin-wall core bit during drilling [Al.sub.2][O.sub.3] bulletproof ceramics (99wt.%) has been conducted.
Among the tools needed for less-costly scientific superdeep drilling and sampling are long-life hard-rock drill and core bits; special core drilling technology for recovering a significant percentage of core; the use of hollow shaft downhole drilling and coring motors for improved core recovery, increased penetration rates, and reduced fatigue and stress in long drill strings; advanced automation for drill pipe handling and tripping equipment; improved methods for borehole trajectory control; more sensitive monitors placed near the bit for early deviation detection, and downhole instruments to monitor core and drill bit performance.
This is a professional grade core bit, available in exact specifications and designed to be used in a variety of drilling jobs.
National Diamond is a leading US manufacturer & distributor of diamond saw blades, diamond core bits, loop blades, diamond cup wheels, diamond polishing pads, tuck point blades, turbo blades and other specialty diamond cutting and finishing tools from over 20 years.
The first was a special Christensen core bit, designed with an extended O.D.
From the same supplier, Core Drill (UK) supplied many impregnated core bits to a mineral drilling contractor on a 12,000 m project in North Wales.
Tenders are invited for Procurement Of 76Mm And 96Mm Hq Pcd Non Coring Bits And Nq Pcd Core Bits Pertaining To Exploration Division
Tenders are invited for Supply Of Low Spc Nq Diamond Core Bits
Tenders are invited for The T C Core Bits And Diamond Core Bits Are Required For Drilling Purpose
Tenders are invited for Rotary Hammer Specification: Rotary Hammer, Model: Gbh 2-22 Re, Drilling Dia In Steel-13 Mm , Core Bits Masonry-68 Mm, Power Output-620 W, No Load Speed-0 To 1000 Rpm, Single Impact Energy-2.2 J, Make: Bosch Or Similar.
Tenders are invited for Procurement Of Diamond Core Bits, Reaming Shells And Casings
Limited Tenders are invited for Procurement Of Impregnated Self Sharpening Diamond Core Bits