Document Type
Patent
Publication Date
12-3-2002
Patent Number
patent number H2052
Abstract
The distal end of a basic tube element including a stopper device with an expandable plug is positioned in a pre-drilled hole in a rock face. Rotating a force control wheel threaded on the tube element exerts force on a sleeve that in turn causes the plug component of the stopper means to expand and seal the distal end of the tube in the hole. Gas under known pressure is introduced through the tube element. A thin capillary tube positioned in the tube element connects the distal end of the tube element to means to detect and display pressure changes and data that allow the permeability of the rock to be determined.
Application Number
09/827701
Assignees
Clemson University (Clemson, SC)
Filing Date
2001-04-07
Primary/U.S. Class
73/38
Other/U.S. Class
73/152.41, 702/12
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