Stanley J Locke

US Patent:

46927077, Sep 8, 1987

Filed:

Jul 6, 1983

Appl. No.:

6/511414

Inventors:

Stanley Locke - Norwalk CT
Michel Gouilloud - Norwalk CT

Assignee:

Schlumberger Technology Corporation - New York NY

International Classification:

G01V 320

US Classification:

324374

Abstract:

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 plurality of individual measurements having respective graduated depths of investigation are obtained and suitably processed to yield resistivity measurements. The body of the sonde carrying the pad may be used to enhance the focussing of the survey current.

US Patent:

46228551, Nov 18, 1986

Filed:

Dec 31, 1984

Appl. No.:

6/687716

Inventors:

Bikash K. Sinha - West Redding CT
Stanley Locke - Norwalk CT

Assignee:

Schlumberger Technology Corporation - New York NY

International Classification:

G01L 1100

US Classification:

73703

Abstract:

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 the sensor is shortened by matching to each other the sensor wall thicknesses adjacent the two SAW devices, e. g. , by making these wall thicknesses approximately the same by means of forming an external flat on the sensor body.

US Patent:

46228543, Nov 18, 1986

Filed:

Dec 31, 1984

Appl. No.:

6/687715

Inventors:

Stanley Locke - Norwalk CT
Bikash K. Sinha - West Redding CT
Michael P. Ekstrom - Paris, FR

Assignee:

Schlumberger Technology Corporation - New York NY

International Classification:

G01L 1100

US Classification:

73703

Abstract:

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 adjacent the long sides of at least one of the SAW devices is rounded, to improve pressure sensitivity without unacceptable increase in stresses or other adverse effects.