| 摘要 |
A method for introducing material under high pressures into selected areas for various purposes which comprises confining non-gaseous carbon dioxide under pressure, applying heat thereto to produce high pressure carbon dioxide gas, conducting the gas into the material and directing the formed high pressure mixture of carbon dioxide gas and material into the selected area. The invention is used to create pressure surges in oil well drilling fluid in a line and for hurling fire retardant material into fires to rapidly extinguish them.
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