Browsing Earth Resources Laboratory by Author "Rao, Rama V.N."

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    • Cement Bond Evaluation Using Early Refracted Arrivals 

      Rao, Rama V.N.; Mandal, Batakrishna; Cheng, Arthur C. H.; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
      The cement bond evaluation tool is a device used to examine the integrity of cement bonding to the casing. A conceptual tool operating between 80-200 kHz is considered here, with a transmitter and two receivers, oriented ...

    • Source Radiation Patterns In Cased Boreholes 

      Rao, Rama V.N.; Turpening, Roger M.; Nafi, M. Toksoz (Massachusetts Institute of Technology. Earth Resources Laboratory, 1997)
      Source radiation from open and cased boreholes are well documented. The effect of an unbonded casing on the radiation patterns of volume, radial stress and axial stress sources in a borehole has received less attention ...