Rock sample testing equipment

Abstract

The invention relates to rock sample testing equipment. The rock sample testing equipment comprises a clamp holder, a confining pressure system, a medium circulating system, a displacement sensor, an extensometer, a balance and a differential pressure sensor, the clamp holder comprises a clamp holder base and a cavity fixed on the clamp holder base, and a cavity is formed in the cavity; the confining pressure system is connected to the clamping device and used for injecting confining pressure liquid into the cavity. The medium circulating system is connected to the rock core and is used for injecting drilling fluid into two ends of the rock sample; a rubber sleeve is attached to and surrounds the rock sample, and an extensometer is arranged on the outer side of the rubber sleeve; a clamp holder sealing end cover is arranged at the bottom of the clamp holder, and a piston fixed on the clamp holder sealing end cover is arranged in the cavity; the balance is connected to one end of the rock sample; the differential pressure sensor is connected to two ends of the rock sample. According to the scheme provided by the invention, the pressure transmission process and the chemical potential difference induced seepage pressure process of the shale at high temperature and high pressure can be simulated, the drilling efficiency is improved, and the drilling cost and the risk of borehole wall instability are reduced.

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