FILTER FOR CLEANING PROCESS LIQUID DURING WASHING OR KILLING OF WELLS Russian patent published in 2016 - IPC E21B43/08 B01D29/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to equipment for current maintenance of wells in oil industry, in particular, to filters for cleaning of the well-killing fluid. Proposed device comprises inlet and discharge branch pipes, a sealed cylindrical body in which the inner cavity is divided by a partition with holes into two sections. One section is bigger than the other and the inner cylindrical wall of the big section is equipped with reflectors. In the lower part of the big filter section there is installed a branch pipe with a plug. Smaller section of the filter comprises a branch pipe with a plug and a valve. On the partition with holes the holes are made over the entire area. In the big section, between opposite walls, there is installed an additional partition parallel to the partition with holes. It is welded to the bottom and side wall of the cylindrical body, and its height is smaller than that of the partition with holes. In the lower part of the filter big section, between the additional partition and the partition with holes, there is installed a valve. Additional partition is equipped with reflectors arranged at different heights with their tops upwards at an angle of 45° and opposite to the inner cylindrical wall of the big section.

EFFECT: higher quality of cleaning of the process liquid pumped into a well.

1 cl, 1 dwg