Assignee
PARA MAGNETIC LOGGING INC
US·4 granted patents·142 citations·filing 1989–1991
Top patents by PatentIndex Score
4 records- 0183US5260661ACalibrating and compensating influence of casing thickness variations on measurements of low frequency A.C. magnetic fields within cased boreholes to determine properties of geological formationsPARA MAGNETIC LOGGING INC·Filed 1991·Granted Nov 9, 1993·65 cites·8 claims
- 0261US5043669AMethods and apparatus for measurement of the resistivity of geological formations from within cased wells in presence of acoustic and magnetic energy sourcesPARA MAGNETIC LOGGING INC·Filed 1989·Granted Aug 27, 1991·22 cites·14 claims
- 0360US5187440AMeasuring resistivity changes from within a first cased well to monitor fluids injected into oil bearing geological formations from a second cased well while passing electrical current between the two cased wellsPARA MAGNETIC LOGGING INC·Filed 1991·Granted Feb 16, 1993·31 cites·9 claims
- 0453US5223794AMethods of operation of apparatus measuring formation resistivity from within a cased well having one measurement and two compensation stepsPARA MAGNETIC LOGGING INC·Filed 1991·Granted Jun 29, 1993·24 cites·2 claims
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