Patents Assigned to Groundflow Limited
  • Method for electrolinetic downhole logging
    Patent number: 6597633
    Abstract: A method and apparatus for measuring the properties, such as permeability, of the rock surrounding a metal cased borehole by generating a seismic or sonic shock downhole within the borehole which is propagated into the surrounding formation where it generates an electrokinetic signal which is detected by measuring the potential between at least two space apart electrodes in contact with the casing.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: July 22, 2003
    Assignee: Groundflow Limited
    Inventors: John William Aidan Millar, Richard Hedley Clarke