Method for producing direct connection between running-controlled horizontal filter well and vertical infiltration well for rock dewatering in lignite mining, involves expanding vertical hole, and dewatering hole in horizontal well

摘要

The method involves placing a connector in a pipeline at a horizontally aligned hole (5) of a running-controlled horizontal filter well (1) under a vertical rinsing hole (4) by loose horizontal drill pipes attacking at the connector. The vertical rinsing hole is pushed down with reduced diameter, and the connector is penetrated in partial areas of the vertical rinsing hole. The connector is expanded to a stable intersection. The vertical rinsing hole is expanded to a vertical infiltration well (2) and directly dewatered in the horizontal filter well. An independent claim is also included for a connector for producing direct connection between a running-controlled horizontal filter well and a vertical infiltration well.