Construction and Technical Characteristics of the Thermodrill for Under Water Operation

Zenjiro HOKAO, Teijiro SHIBATA, Shoji OMURA
1973 Journal of the Mining and Metallurgical Institute of Japan  
The piercing holes in the sea bed is a first stage operation on the ocean development, this creates technical difficulties, however, as many boring machines used on land are not efficient for under water operation. The authors built a special jet piercing machine or thermodrill which could operate under water efficiently. . The thermodrill operates with oxygen gas and kerosene. The piercing holes at the bottom of the sea requires high pressure of the jet stream, more than 10kg/cm2. This paper
more » ... scribes the construction and technical characteristics of the thermodrill, and the measuring results of total pressure of the jet stream. The controll systems of oxygen gas, kerosene and cooling water are also described.
doi:10.2473/shigentosozai1953.89.1020_89 fatcat:4c4vmodfmjaitd7zoe6abfxaoa