Low-bit-pressure drilling and grinding comprehensive simulation test system with confining pressure

Abstract

The invention relates to a low-bit-pressure drilling and grinding comprehensive simulation test system with confining pressure, which comprises a bracket, a base, a simulation sleeve, a confining pressure loading device, a rotary driving device and a drilling tool, and is characterized in that the bracket is erected on a foundation, the foundation is provided with a pit hole, the base is arranged on the bottom wall of the pit hole, and a carrier is arranged at the upper end of the base; the base is provided with a bit pressure loading device used for pressurizing the carrier upwards, the upper end of the carrier is provided with a concave cavity, the simulation sleeve is vertically installed on the bottom wall of the concave cavity, a target piece is installed in the simulation sleeve, the bottom wall of the concave cavity is provided with an impact force detector, the confining pressure loading device is assembled outside the simulation sleeve and used for loading confining pressure to the simulation sleeve, and the support is provided with a loading beam capable of moving up and down. The rotary driving device is arranged on the loading beam, the drilling tool is arranged above the target piece and is in transmission connection with the rotary driving device, and a drilling displacement monitor is arranged on the loading beam. The device has the advantages that under different confining pressures, drilling and grinding tests can be implemented by simulating a coiled tubing to be matched with a turbine drill, a screw motor, a rotary punching tool, a jet motor and other tools.

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