FILTERING MODULE Russian patent published in 2015 - IPC E21B43/08 

FIELD: oil-and-gas industry.

SUBSTANCE: device contains a bearing housing designed as a pipe, a shaft, a filtering element consisting of, at least, one unit of independent replaceable ring filtering bushings, installed coaxially with the housing. The module is fitted with, at least, one gripping bushing which is coaxially installed on the housing surface, with, at least, one additional spacer ring on the joint of adjacent of replaceable bushing units, installed on the external surface of the housing and fitted with a radial hole. The centralizer designed as a thin-walled ring frame which has a cross-section with adjacent ledges and hollows in the radial direction, is installed with possibility of adjunction of ledges to the internal surface of the filtering element and hollows to the external surface of the housing. The internal surface of each gripping bushing is fitted with evenly distributed on it radial depressions designed open from the bearing housing and through along a longitudinal axis of the gripping bushing. The external surface of each gripping bushing and the top flange of the module are fitted with ledges. The module case in the zone of location of each sliding bearing is fitted with, at least, one radial channel and a radial hole.

EFFECT: reliability improvement and service life increase, service facilitating, productivity increase.

13 cl, 7 dwg