WELL CLEANING DEVICE Russian patent published in 2021 - IPC E21B37/00 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry and can be used when cleaning a well from bottom hole cuttings and scrap, proppant, small metal and non-metallic objects. The device contains a body with a connecting thread for fastening on a string of process pipes, or a string of tubing, or a string of coiled tubing and delivery of the device to the well, a waste container, centralizers, a device for supplying liquid coming from the earth's surface in the form of an ejector equipped with replaceable nozzles and fittings providing various working combinations of flow rate and pressure of the working fluid flowing through the body of the device. The ejector is installed above the filter section connected to the accumulator, which is connected by means of a valve to a tip made with a bevel to destroy sand or debris plugs in the well. The filter section is assembled from a fine mesh filter, a coarse filter and a magnetic filter. The storage device is made in the form of several pipes coaxially screwed together with the possibility of increasing the volume. The valve is equipped with working elements that ensure the flow of working fluid with sludge only in one direction from bottom to top.

EFFECT: possibility of cleaning a well with a high degree of absorption is provided, the likelihood of the device sticking is reduced, the device can be used in wells with different inner diameters, it is possible to adjust the volume of the garbage accumulator and adjust the operating modes.

2 cl, 3 dwg