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Title: 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:
 [1]
  1. (Albuquerque, NM)
Publication Date:
Research Org.:
AT & T CORP
OSTI Identifier:
865416
Patent Number(s):
US 4510799
Assignee:
United States of America as represented by United States (Washington, DC) SNL
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 = {1985},
month = {1}
}

Patent:

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