ABOVE-PACKER SLUDGE TRAP Russian patent published in 2020 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used in well cleaning using packer. Sludge trap includes branch pipe, metal rings and stiffeners. From outside, the housing is concentrically installed, from below the branch pipe and housing are rigidly and tightly connected by a plug, and from the top the branch pipe and the housing are rigidly connected by stiffness ribs. Metal rings are made in the form of truncated cones, the base is directed downwards and located between the housing and the branch pipe, at that, the external rings are rigidly fixed to the housing, and annular channels are formed with branch pipe, diameters of annular channels of metal rings are reduced downwards. Under lower metal ring body is equipped with radial holes, and branch pipe above housing is equipped with filter with radial holes. Above radial holes in filter there installed and fixed is movable bushing with mounting seat for dropable ball, wherein the movable bushing has the possibility of limited longitudinal movement downwards with tight covering of the holes and fixation relative to the filter. Check valve is installed in the pipe below the filter. Outside housing is equipped with self-sealing cuff passing from bottom to top. Cuff is fixed on the housing so that its upper edge is located opposite the upper end of the housing. Device is equipped with slime catching chamber below radial openings of housing.

EFFECT: increased efficiency and reliability of operation, increased volume of extracted sludge, expanded technological capabilities of the device.

1 cl, 4 dwg