core barrel

core barrel

[′kȯr ‚bar·əl]
(design engineering)
A hollow cylinder attached to a specially designed bit; used to obtain a continuous section of the rocks penetrated in drilling.

core barrel

The hollow cutting tool of a core drill; consists of a section of pipe which has a carbide insert or diamond cutting edge.
References in periodicals archive ?
Tenders are invited for Nx Size Exploratory Diamond Core Drilling With Double Core Barrel (50 M Length) In I Seam At Kuya U/G Mine
The company developed the wireline-retrieved Q core barrel, which revolutionized the exploration business in the 1960s and is still the standard used for exploration drilling.
The technology incorporates sonic frequencies that match the resonant energy of the ground, allowing the core barrel to easily advance in unconsolidated and difficult overburden formations.
Among the topics are dosimetry assessments for the reactor pressure vessel and core barrel in British pressurized water reactor plants, the sensitivity of adjustment to parameter correlations and to response-parameter correlations, Los Alamos National Laboratory fission basis, reactor pulse-repeatability studies at the Annular Core Research Reactor, and developing neutron measurement in intense gamma fields using a new type of nuclear emulsion.
Continuous representative cores were retrieved using a 100mm internal diameter 3 metre core barrel with complete undisturbed intervals recovered from the mineralised sections.
The 70-employee plant makes core barrel, drill rods and other in-hole products for clients worldwide.
The adjustable speed, hydraulic top head with direct reading tachometer allows you to set the rotary speed control to match the size of the core barrel and type of material being drilled, including re-bar.
One is for the basic design of a key structure called a core barrel assembly (CBA), part of the pebble bed modular reactor (PBMR), and the other is for provision of forgings and procurement of items for the CBA.
This was accomplished by driving three-meter long, aluminum core barrels into the bog sediments aided by a Vibra-Coring device, which produces high-frequency vibrations that help drive the core barrel into the sediments while minimizing deformation of the stratigraphy.
An inner core barrel just above the bit at the bottom of the drill string is retrieved by a wire cable that travels down the center of the drill pipe.
The rig is optimized for Atlas Copco's latest diamond bit and core barrel technologies, and can be delivered skid or crawler mounted with an electric or diesel power unit.
However, advanced piston coring, which drives the core barrel through the sediment by hydraulic pressure, yields almost perfect recovery of soft, unlithified sediments that would be severely disturbed by rotary drilling.