| 摘要 |
PCT No. PCT/GB93/00526 Sec. 371 Date Jan. 9, 1995 Sec. 102(e) Date Jan. 9, 1995 PCT Filed Mar. 12, 1993 PCT Pub. No. WO93/18279 PCT Pub. Date Sep. 16, 1993A method of raising material, such as production fluid (6), from a bore hole (3) involves pumping water down a pipe (7) to a fluidising unit (A) so that the water activates and entrains the material and carries it up through a discharge conduit (8) to a separator (B).
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