FIELD: hydraulic fracturing.
SUBSTANCE: invention can be used in the manufacture and repair of screw conveyors used for hydraulic fracturing. Pre-cut screw blades are welded in straight sections into a continuous spiral and welded to the base pipe mounted on the shaft. The first sections of the spiral are attached to the beginning of the base pipe. The entire screw structure is sequentially assembled and welded by imparting rotational movement to the shaft at a constant speed. The resulting screw conveyor is heated to 300°C in the furnace, then again installed on a rotating shaft and the screw spiral is welded with a high-alloyed electrode wire with a carbon content of 3.5 wt.%.
EFFECT: surfacing of a high-alloy additive on the screw spiral provides an increase in the service life of the screw conveyor.
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