A METHOD FOR HORIZONTALLY DRILLING FILTRATE INTAKE WELL AND APPARATUS FOR CLOGGING FRONT TIP OF WELL

摘要

An apparatus for closing the leading end of a horizontal pumping well and a method for drilling a horizontal pumping well using the same are provided to improve efficiency in digging the horizontal pumping well by preventing inflow of soil and discharging the dug soil smoothly. A method for drilling a horizontal pumping well comprises the steps of: completing drilling of the horizontal pumping well by digging the side wall of a vertical pumping well using an outer pipe casing(110) and an inner screw rod(120) in a drilling machine located in the bottom of the vertical pumping well; separating a drilling tool equipped on the leading end of the screw rod so as to serve as a closing device closing the leading end of the horizontal pumping well; drawing the screw rod out of the horizontal pumping well; separating the outer pipe casing from the drilling machine to remain inside the horizontal pumping well; inserting a perforated pipe in the outer pipe casing so as to contact the drilling tool; and removing the outer pipe casing in order to complete the horizontal pumping well including the perforated pipe.