The results show that the driving module can provide a stable rotation speed of up to 150 r/min when the sealing pressure is 140 MPa. On the other hand, the performance of the driving module is tested. There is no leakage of pressure or fluid in the whole test process.

The results show that the test cabin with inner diameters of 150 mm and 500 mm runs stably under the working condition of a pressure up to 190 MPa (considering the influence of temperature of 150 ☌), and the cabin remains in the stage of elastic deformation. On the one hand, a segmented simulated coring test cabin is constructed, and pressure testing of the test cabin is carried out. Furthermore, the two main modules of the device are analyzed and studied experimentally. The principles and methods of applying temperature and pressure to the device are expounded.

Therefore, to adapt to the special application scenario of the research and development of pressure-preserving coring tools under the extreme environmental conditions of deep strata, in this study, an in-situ simulation device under high-temperature and ultrahigh-pressure conditions is developed.

With the increasing mining depth of deep mineral resources, the underground temperature and pressure also increase, which requires more advanced mining equipment.

Need for speed underground full