| 5276656 |
Method for fluid identification and evaluation within wellbores using ultrasonic scanning |
Charles F. Magnani |
1994-01-04 |
| 5164548 |
Method and apparatus for ultrasonic scanning of a borehole having improved sensor array and timing circuit |
— |
1992-11-17 |
| 5138585 |
Method for fluid identification and evaluation within wellbores using ultrasonic scanning |
Charles F. Magnani |
1992-08-11 |
| 4862424 |
Interferometric means and method for accurate determination of fiberoptic well logging cable length |
Peter Graebner, Swan A. Sie |
1989-08-29 |
| 4847814 |
Three-dimensional borehole televiewer display |
— |
1989-07-11 |
| 4803479 |
Electrical phase measurement means and method for accurate determination of well logging cable length |
Peter Graebner, Swan A. Sie |
1989-02-07 |
| 4722603 |
Interferometric means and method for accurate determination of fiber-optic well logging cable length |
Peter Graebner, Swan A. Sie |
1988-02-02 |
| 4714889 |
Method of interpreting impedance distribution of an earth formation using precursor logging data provided by a multi-electrode logging array stationary within a borehole |
Carroll W. Chapman |
1987-12-22 |
| 4711122 |
Flexible mud excluder for borehole televiewer |
Dennis J. Fischer |
1987-12-08 |
| 4703279 |
Method of interpreting impedance distribution of an earth formation penetrated by a borehole using precursor data provided by a moving logging array having a single continuously emitting current electrode and a multiplicity of potential electrodes |
Carroll W. Chapman |
1987-10-27 |
| 4677386 |
Method of interpreting impedance distribution of an earth formation obtained by a moving array using end emitting current electrodes sequentially activated and a series of potential electrodes |
Carroll W. Chapman |
1987-06-30 |
| 4677385 |
Methd of logging an earth formation penetrated by a borehole to provide an estimate of impedance distribution with depth using end emitting current electrodes sequentially activated and a multiplicity of potential electrodes of a moving logging array |
Carroll W. Chapman |
1987-06-30 |
| 4675611 |
Method of logging an earth formation penetrated by a borehole to provide an improved estimate of impedance distribution of the formation |
Carroll W. Chapman |
1987-06-23 |
| 4675610 |
Method of logging an earth formation penetrated by a borehole to provide an improved estimate of impedance distribution with depth using a single continuously emitting current electrode and a multiplicity of potential electrodes of a moving logging array |
Carroll W. Chapman |
1987-06-23 |
| 4556884 |
Depth dependent multiple logging system |
Anthony P. S. Howells, Anthony M. Dienglewicz, Raman Viswanathan |
1985-12-03 |
| 4514809 |
Dynamic range control of electrode pad current in well logging tools |
Wade M. Johnson |
1985-04-30 |
| 4402068 |
Method and apparatus for acoustic well logging |
— |
1983-08-30 |
| 4346593 |
Well logging correction method and apparatus |
Anthony P. S. Howells, Raman Viswanathan |
1982-08-31 |
| 4320470 |
Method and apparatus for acoustic well logging |
— |
1982-03-16 |
| 4297879 |
Well logging correlation method and apparatus |
Anthony P. S. Howells, Ronald E. Diederich |
1981-11-03 |
| 4271356 |
Method and apparatus for natural gamma ray spectrum analysis using microprocessor stripper |
Vernon E. Groeschel |
1981-06-02 |
