Measuring and testing – Borehole or drilling – Downhole test
Patent
1984-08-23
1987-02-10
Kreitman, Stephen A.
Measuring and testing
Borehole or drilling
Downhole test
73152, 73597, 73784, 367 25, 367 75, G01V 140, E21B 4900
Patent
active
046415203
ABSTRACT:
A technique and apparatus for estimating in situ stresses by measuring stress-induced velocity anisotropy around a borehole. Two sets each of radially and tangentially polarized transducers are placed inside the hole with displacement directions either parallel or perpendicular to the principal stress directions. With this configuration, relative travel times are measured by both a pulsed phase-locked loop technique and a cross correlation of digitized waveforms. The biaxial velocity data is used to back-calculate the applied stress.
REFERENCES:
patent: 3354983 (1967-11-01), Erickson et al.
patent: 3580057 (1971-05-01), Seegmiller
patent: 3796091 (1974-03-01), Serata
patent: 4030345 (1977-06-01), Edmond et al.
patent: 4075885 (1978-02-01), Hardy et al.
patent: 4080836 (1978-03-01), Thompson et al.
patent: 4346460 (1982-08-01), Schuster
patent: 4363242 (1982-12-01), Heyman
patent: 4380806 (1983-04-01), Waters et al.
patent: 4522071 (1985-06-01), Thompson
Carnahan L. E.
Hightower Judson R.
Kreitman Stephen A.
Oldham Scott M.
Sartorio Henry P.
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