Method for determining fracture toughness of rock by core boring

Details Method for determining fracture toughness of rock by core boring Method for determining fracture toughness of rock by core boring

1987-02-19

1988-07-26

Myracle, Jerry W.

Measuring and testing

Borehole or drilling

Downhole test

73799, E21B 4902

Patent

active

047592141

ABSTRACT:
The disclosed method introduces a pressure effectivity factor h, so as to continuously determine fracture toughness K.sub.IC of rock during core boring by using the equation of

REFERENCES:
patent: 2555275 (1951-05-01), Millison
Abou-Sayed, A. S., An Experimental Technique . . . Stress Conditions, 6th Int. Conference on Exp. Stress Analysis, Munich, Germany, 1978, pp. 819-824.

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