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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