Borehole dilatometer with intensifier

Details Borehole dilatometer with intensifier Borehole dilatometer with intensifier

E - Fixed Constructions

21

B

166/2

E21B 49/00 (2006.01) E02D 1/02 (2006.01)

Patent

CA 1244755

ABSTRACT OF THE DISCLOSURE Apparatus for use in testing the mechanical behaviour and deformation characteristics of rocks and the like at various locations in a borehole comprises a pressure intensifier used in conjunction with a dilatometer head, the two being rigidly interconnected so as to be lowered into the borehole. The pressure intensifier comprises a cylindrical housing providing upper and lower cylinders, and a double action piston which provides a 6 to 1 differential between the input pressure side and the output pressure side. Pressure changes are measured by means of a pressure transducer, and volumetric changes are determined from measurements of the linear displacement of the piston. Such linear displacements are measured by means of a shaft encoder coupled to a motion translating device for translating linear displacement into rotary displacement.

506586

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