METHOD FOR CATCHING AND DISPOSING OF SAND FROM PRODUCTS OF PETROLEUM AND GAS BOREHOLES AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2021 - IPC B01D19/00 B01D45/12 E21B43/34 B01D17/04 

FIELD: petroleum industry.

SUBSTANCE: invention relates to the petroleum industry and can be used in oil separation and preparation units. The invention relates to an apparatus for catching and disposing of sand from the products of petroleum and gas boreholes, including a gas separator-sand catcher containing an inlet ascending inclined flow stabiliser pipeline in the form of a bundle of internal pipes, connected with the inlet vertical chamber in the form of a gas removal cap equipped with a gas outlet branch pipe and a central pipe with a screw swirler. The apparatus also includes a separation container with a liquid outlet branch pipe wherein a package of plane-parallel plates is placed. The spiral of the screw swirler is located along the entire length of the central pipe. The body of the separator is inclined towards the liquid flow and separated by a sand barrier divider separating the buffer area from the sedimentation area, located wherein is a package of plane-parallel plates with a deposition mirror with an area multiple of at least three areas of the mirror of the sedimentation area. Each area along the lower generatrix is equipped with a sand-collecting and silt-accumulating chamber with apparatuses for washing and removing accumulated mechanical impurities, respectively. The apparatus includes a drainage container with a submersible centrifugal pump and a sludge washing system, separated by a sand barrier divider, and the outlet of the submersible centrifugal pump is connected by a pipeline with a washing apparatus in the drainage container and with a washing apparatus in the separator. The invention also relates to a method for catching and disposing of sand from the products of petroleum and gas wells, implemented in the above apparatus. The method includes supplying a gas-water-petroleum mixture incoming from the borehole, separating and removing free gas into a gas pipeline, breaking down the petroleum-water emulsion into petroleum and water, depositing solid particles, washing the deposition by a water jet with removal of sand and silt into a drainage container. The deposition is washed and removed into the drainage container cyclically using water accumulated in the drainage container, returning the water to the washing system.

EFFECT: combination of processes of removing abnormal volumes of gas and simultaneously sand and mechanical impurities before entering the preliminary water discharge unit (PWDU) for increasing the efficiency thereof, a simplification of the design due to differentiation of the sedimentation and buffer separation areas in one container.

2 cl, 2 dwg