Patent ID: 8662167

Claim:
Separating device for removing sand and rock particles which is suitable as an integral component part of extraction equipment for the extraction of liquids or gases from deep wells, the separating device comprising at least one ceramic filter module ( 1 ), the ceramic filter module ( 1 ) comprising: a) an annular stack ( 6 ) of brittle-hard annular discs ( 7 ), the upper side ( 16 ) of which has at least three elevations ( 8 ) uniformly distributed over the circular circumference of the discs, the discs ( 7 ) being stacked and braced in such a way that a separating gap ( 9 ) for the removal of sand and rock particles is present in each case between the individual discs ( 7 ), b) a coupling-on element ( 10 ) at the upper end and a coupling-on element ( 11 ) at the lower end of the annular stack ( 6 ), c) a clamping device ( 14 , 15 ) for the axial bracing of the annular stack ( 6 ), d) an outer cage ( 5 ) for the mechanical protection of the filter module ( 1 ), e) a coupling element ( 12 ) at the upper end and a coupling element ( 13 ) at the lower end of the ceramic filter module ( 1 ) for connecting the ceramic filter module ( 1 ) to further components of the extraction equipment, wherein the discs ( 7 ) are stacked and braced in the annular stack ( 6 ) such that the discs ( 7 ) are movable with respect to one another in the radial and tangential directions, and wherein the annular discs ( 7 ) comprise, at least in part, a ceramic material.