| 摘要 |
PROBLEM TO BE SOLVED: To provide equipment for pulling up slime etc. accumulated on the bottom of a well, which enables even the hardened slime to be pulled up in an efficiently crushed manner. SOLUTION: A jet nozzle 2 is provided at the tip of a high-pressure pipe 4 for feeding high-pressure water; a cylindrical net cage 3 with an opened upper end is attached to the tip of the high-pressure pipe 4 in such a manner as to be concentric with the high-pressure pipe 4; and the jet nozzle 2, which is provided at the tip of the high-pressure pipe 4, is provided with a lower jet orifice 8 for emitting a jet of high-pressure water downward, and upper jet orifices 9, 9... for emitting the jet of high-pressure water obliquely upward. COPYRIGHT: (C)2005,JPO&NCIPI
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