core bit


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core bit

[′kȯr ‚bit]
(design engineering)
The hollow, cylindrical cutting part of a core drill.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The wear rate data of the sintering diamond core bit under different bit performance and machining process parameters involved in this paper can be found in the figures drawn with Origin software.
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.
These items include Cheetah-2, Green Giant, T-SEG Signature 15 (all saw-blade models), and Pro Core Bits-wet which is a professional grade core bits model.
The Devico steerable core barrel has two eccentric bearings which can displace the inner barrel and its attached core bit to give a maximum deviation of up to 1.5 [degrees] in 1 m.