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Calibration Models for Geophysical Borehole Logging.

Authors
Snodgrass-JJ
Source
NTIS: PB 255 499 :21 pages
Link
NIOSHTIC No.
10000830
Abstract
The Bureau of Mines designed and constructed a series of calibration models for geophysical borehole logging. A nominal hole diameter of 3 inches was selected as representative of typical core holes drilled for mining and engineering purposes, although additional hole diameters of 2, 5, and 8 inches are provided in one of the models for determination of empirical correction factors for variations in hole diameter. The physical properties of the models were determined by laboratory analyses of drill core samples and evaluated statistically for reliability. This report outlines the location of the models, elements of design and construction, and results of the laboratory tests. The models are available at the Denver Federal Center, Denver, Colorado, for use by government agencies and private industry to calibrate logging equipment for measurements of density, sonic velocity, magnetic susceptibility, and electrical resistivity.
Publication Date
19760101
Document Type
IH; Report of Investigations
Fiscal Year
1976
NTIS Accession No.
PB-255499
NTIS Price
A03
Identifying No.
RI 8148
NIOSH Division
DRC;
Source Name
NTIS: PB 255 499
State
CO;
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