| 摘要 |
According to a first embodiment, the invention relates to a separating device for removing sand and rock particles in the extraction of liquids or gases from wells drilled in rock, comprising a plurality of annular discs of a brittle-hard material stacked one on top of the other and axially braced by means of a supporting structure, the discs having on their upper side at least three spacers uniformly distributed over the circular circumference of the discs, the discs being stacked one on top of the other in such a way that the spacers respectively lie one over the other, and that a separating gap with a height of 0.05-1 mm, preferably 0.2-0.5 mm, is present in each case between the individual discs. According to a second embodiment, the invention relates to a separating device for removing sand and rock particles in the extraction of liquids or gases from wells drilled in rock, comprising a plurality of bush-shaped elements of a brittle-hard material stacked one on top of the other and axially braced by means of a supporting structure, slits with a slit width of 0.05-1 mm, preferably 0.2-0.5 mm, being formed in the bush-shaped elements.
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