| Patent Number |
Title Of Patent |
Date Issued |
| 4692707 |
Method and apparatus for measuring the earth formation resistivity of a plurality of radial regi |
September 8, 1987 |
| A wall engaging pad for well logging comprises a face portion of electrically conductive material within which are disposed three or more current electrodes. The survey current emitted from the current electrodes is differently focussed. A suitable current return is furnished. A plur |
| 4622855 |
Low thermal response time surface acoustic wave sensors |
November 18, 1986 |
| Disclosed is an externally loaded pressure sensor using a pair of SAW devices formed on the wall of an interior cavity. The difference frequency of these devices is used as a temperature-compensated measure of hydrostatic pressure on the sensor exterior. The termal response time of t |
| 4622854 |
Rounded wall surface acoustic wave sensors |
November 18, 1986 |
| Disclosed is an externally loaded pressure sensor using a pair of SAW devices formed on the wall of an interior cavity. The difference frequency of these devices is used as a temperature-compensated measure of hydrostatic pressure on the sensor exterior. The cavity wall immediately a |
