Patent ID: 9249560
Filing Date: 2016-02-02
CPC Classification: E03B,E21B

Claim Text:
1. An apparatus for activating or cleaning filter tube wells which have a filter tube, comprising a first volume body and a second volume body, which are adapted to an inner diameter of the filter tube by outer diameters of the first volume body and the second volume body and whose outer circumferential surfaces are designed to be flexible in a radial direction with respect to the a well longitudinal axis, such that a sealing effect exists between the outer circumferential surfaces of the respective volume bodies and an inner wall of the filter tube; a removal chamber, which is hydraulically connectable to a pump device, the removal chamber being provided between the first and second volume bodies and the inner wall of the filter tube; and at least one equalizing tube which completely penetrates the removal chamber in a longitudinal direction of the apparatus, such that a hydraulic flow is established between outer end faces of the two volume bodies opposite the removal chamber, the equalizing tube equalizing volumetric flow of the first and second volume bodies between the outer end faces.