How about the collapse of rotary drilling machine?
You have to use a large proportion of mud. If you can't do it, you'll have to use a reverse circulation rig or an impact drill.
The term "drilling machine" generally refers to the equipment for drilling the earth's crust. Differential screw feeding type, hydraulic feeding type drilling machine; rotary - rope decompression type, hydraulic cylinder decompression type drilling rig; mobile rotary type - full hydraulic power head type, mechanical power head drill. Vibratory drill. Composite rig: vibration, impact, rotation, static pressure and other functions in different combinations of drilling rig together. The former Ministry of Geology and mineral resources in the Department of "DZ3-79" in the provisions of the rig category (table 3-1), all with Chinese Pinyin letters.
Drill rig is mechanical equipment for drill holes on the surface, can be a large outdoor wells, oil and gas well drilling equipment, small equipment or single movable, called spiral drill. The drilling rig can take samples of underground mineral deposits, or for underground production facilities such as underground machines, instruments, pipes and wells. It is a mobile device mounted on the truck, trailer, track, or is fixed on land and offshore structures (such as drilling platform, generally referred to as the "offshore oil rig", although the design does not contain a drill).
