Oil shale is a very important alternative energy, hydraulic mining is an effective method for oil shale utilization in Jilin Province. For the Nong'an oil shale in Jilin Province, the average compressive strength of horizontal bedding is 17.14MPa, and the average compressive strength of vertical bedding is 10.90MPa. For cone straight-shaped nozzle, when the jet pressure P is 10MPa and the nozzle outlet diameter d is 1mm, striking force generated by the jet is 15.65N, it can break the oil shale.

Aluminum alloy drill pipe used in deep drilling has great potential and broad field of application. Unlike steel drill pipe production method, aluminum alloy drill pipe is manufactured using forward extrusion in the horizontal hydraulic extrusion press to extrud internal/external upset ends with variable cross-section, and form an assembly line to produce aluminum alloy drill pipe. In this experiment, using 55MN double-action extrusion press on 7075 aluminum alloy tubing to get variable cross-section on one-shot, the extruded pipe body are in good surface quality wihtout cracks, laying the foundation for the forming technology of variable cross-section of aluminum alloy drill pipe.

WAl12 reinforced 2024 aluminum alloy matrix composites were prepared by powder metallurgy with tungsten particles and W50Al50 alloy particles. The effects of WAl12 on the mechanical properties of 2024 aluminum alloy composites at room temperature and high temperature were studied, and the friction behavior was characterized. The results show that intermetallic WAl12 phase forms in the composite by 2024 aluminum alloy and tungsten. The mechanical properties and friction behavior can be improved by the formation of intermetallic WAl12 phase. The tensile strength of 2024 aluminum alloy at room temperature and 180 °C can be improved by adding tungsten less than 1.5 at.%. Adding 2.0 at.% tungsten can reduce the friction coefficient by 20 % and the scratch width by 40 %. The tensile fracture surface of the sample was analyzed by scanning electron microscopy (SEM), indicating that WAl12 intermetallic phase is closely connected with the aluminum matrix.