This technology is used in loose sandstone oil and gas reservoirs, particularly in water and steam injection development, and in heavy oil reservoirs with severe sand production. When the sand control pipe string cannot be placed at the designed well depth due to continuous sand production from the reservoir, this technology allows for simultaneous flushing and lowering during the descent process, enabling the tools to reach the designed position smoothly. Anton provides reverse filling technology services and supporting tools for conventional casing completion well types.