FIELD: mining industry.
SUBSTANCE: group of inventions relates to a drilling system with several channels for flow circulation and to a drilling method for drilling wells with a large bore diameter in solid rocks. The drilling system contains a ground manifold and equipment of a submersible air hammer, a gas lift manifold and equipment, a drilling drive unit, a drilling tool with several channels for flow circulation, and equipment of drilling mud circulation (6). The ground manifold and equipment of the submersible air hammer and the gas lift manifold and equipment, respectively, are connected to the drilling tool with several channels for flow circulation by means of a drilling drive unit. The equipment of drilling mud circulation (6) is connected to the drilling drive unit by means of erosion-resistant gooseneck (15) and sand discharge pipeline (14).
EFFECT: system combines advantages of sand removal with a gas lift reverse circulation and an air hammer with a closed reverse circulation, and can significantly reduce the amount of gas introduced, while ensuring drilling efficiency, which reduces the area occupied at the work site, reduces the need for energy and flushing fluid, and reduces fuel consumption.
10 cl, 12 dwg
