Patent ID: 8561474
Filing Date: 2013-10-22
Classification: E21B,G01N

Abstract:
1. A triaxial cell for the testing of geomaterials on specimens including: at least one piston for subjecting a specimen to a stress directed along the longitudinal axis of the specimen; hydraulic means for subjecting a lateral wall of the specimen to a stress, under the pressure of a fluid; said hydraulic means comprising at least one sealed test chamber inside which the specimen is placed, and a circuit for pressurising and controlled draining of said test chamber with a pressurising fluid, wherein said cell exhibits means for subjecting the specimen to a tensile force, provided for removably fastening it between two attachments intended to move apart or closer together under the action of said at least one piston so as to subject said specimen to said longitudinal stress or to remove the load therefrom; and, wherein said subjecting means include at least two half-shells situated in said test chamber, respectively interconnected with two elements to be subjected to one another removably, wherein both said half-shells form a sealed shell when said attachments are brought closer, the internal volume of the sealed shell constituting a depressurising chamber, and a circuit for putting under vacuum said depressurising chamber.