In-situ stress project, Technical Report Number 8; Calibration and accuracy of electronic gauges used in the hydrofracturing experiment, Cajon Pass, California

Abstract

This report (map) Is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards (and stratigraphlc nomenclature). Any use of trade names is for descriptive purposes only and doe* not imply endorsement by the U.S.G.S.

In-situ stress project Technical Report Number 7; The use of mechanical pressure and temperature gauges in hydraulic fracturing at the Cajon Pass well, California

“…The Kuster gauge and a Data Instruments (DI) pressure transmitter are run together on the wireline. The DI gauge is read at the surface in the logging truck (see Updegrove and Springer, 1987). The Kuster gauge screws onto the bottom of this gauge and a standing valve is connected to the bottom of the entire assembly.…”