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 2011, the market scale of core drill in China grew by 14.
And the trend has been concerned by some of Chinese industrial players which are intensifying their input in the R&D of full-hydraulic deep-hole core drill products.
Another Sweden-based company, Sandvik, is not only a high-tech transnational company, but one of the three leading core drill producers in the world.
Lianyungang Huanghai Machinery is the only listed Chinese company in China core drill industry, with the major products including full-hydraulic power core drills and spindle-type core drills.
2 inch diameter) diamond core drill and directional diamond core holes will be drilled toward the mineral targets defined by the in-hole geophysics; and that it is expected to cost less than half of standard drilling approaches.
The geographic location of the core drill program was selected to coincide with the area of the kaolin deposit most likely to be subjected to initial development.
Coremaster core drills cut freely at high speeds and are able to straighten a cored hole in one pass, eliminating a finish pass.
Since ordinary rotary core drills would have turned these soft sediments into soup, the crew used a technique called hydraulic piston coring, which collects fragile sediments virtually intact.