Method of measuring material properties of rock in the wall of a borehole
Abstract
To measure the modulus of elasticity of the rock in the wall of a borehole, a plug is cut in the borehole wall. The plug, its base attached to the surrounding rock, acts as a short column in response to applied forces. A loading piston is applied to the top of the plug and compression of the plug is measured as load is increased. Measurement of piston load and plug longitudinal deformation are made to determine the elastic modulus of the plug material. Poisson's ratio can be determined by simultaneous measurements of longitudinal and lateral deformation of the plug in response to loading. To determine shear modulus, the top of the plug is twisted while measurements are taken of torsional deformation.
- Inventors:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- AT&T
- OSTI Identifier:
- 865416
- Patent Number(s):
- 4510799
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
E - FIXED CONSTRUCTIONS E02 - HYDRAULIC ENGINEERING E02D - FOUNDATIONS
E - FIXED CONSTRUCTIONS E21 - EARTH DRILLING E21B - EARTH DRILLING, e.g. DEEP DRILLING
- DOE Contract Number:
- AC04-76DP00789
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; measuring; material; properties; rock; wall; borehole; measure; modulus; elasticity; plug; cut; base; attached; surrounding; column; response; applied; forces; loading; piston; top; compression; measured; load; increased; measurement; longitudinal; deformation; determine; elastic; poisson; ratio; determined; simultaneous; measurements; lateral; shear; twisted; torsional; simultaneous measurement; material properties; shear modulus; simultaneous measurements; applied force; borehole wall; elastic modulus; applied forces; surrounding rock; /73/
Citation Formats
Overmier, David K. Method of measuring material properties of rock in the wall of a borehole. United States: N. p., 1985.
Web.
Overmier, David K. Method of measuring material properties of rock in the wall of a borehole. United States.
Overmier, David K. Tue .
"Method of measuring material properties of rock in the wall of a borehole". United States. https://www.osti.gov/servlets/purl/865416.
@article{osti_865416,
title = {Method of measuring material properties of rock in the wall of a borehole},
author = {Overmier, David K},
abstractNote = {To measure the modulus of elasticity of the rock in the wall of a borehole, a plug is cut in the borehole wall. The plug, its base attached to the surrounding rock, acts as a short column in response to applied forces. A loading piston is applied to the top of the plug and compression of the plug is measured as load is increased. Measurement of piston load and plug longitudinal deformation are made to determine the elastic modulus of the plug material. Poisson's ratio can be determined by simultaneous measurements of longitudinal and lateral deformation of the plug in response to loading. To determine shear modulus, the top of the plug is twisted while measurements are taken of torsional deformation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 1985},
month = {Tue Jan 01 00:00:00 EST 1985}
}
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