Borehole pressure cell

Details Borehole pressure cell Borehole pressure cell

1976-08-13

1977-06-21

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

E21B 4900

Patent

active

040303454

ABSTRACT:
A device and method for determining strength properties of a subterranean formation. The device is insertable into a borehole formed in the formation, and includes a pair of inflatable semi-cylindrical members mounted on a shaft. The inflatable members when pressurized exert radial force in all directions except along the plane between the members, with the result that a higher parting force is exerted on the formation perpendicular to the plane between the members than across any other plane through the axis of the device.

REFERENCES:
patent: 3466926 (1969-09-01), Ruppeneit et al.
patent: 3987669 (1976-10-01), Daneshy
Lord, A. E. et al., Acoustic Emission. . . Capacity from Materials Evaluation, May 1976, pp. 103-108.

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