Balling-resistant PDC drill provided with penetrating pits in flow passage surface

• Main Authors: LIN MIN, REN HAITAO, CHEN LIAN, ZHOU CHUNXIAO, YANG YINGXIN, QIN XIAOQING, BAO ZEJUN, WANG XIYONG
• Format: Patent
• Language: Chinese; English
• Published: 11.06.2014
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The utility model discloses a balling-resistant PDC drill provided with penetrating pits in the flow passage surface. The balling-resistant PDC drill comprises a drill body, wherein a screwed joint connected with a drill rod is arranged at the lower part of the drill body; a plurality of blade wings are arranged at the upper part of the drill body; a flow passage groove in the drill is formed by the notches among the blade wings; the whole or part of the surface of the flow passage groove is provided with communicating pits. Compared with the conventional PDC drills, the balling-resistant PDC drill provided with the penetrating pits in the flow passage surface can obviously reduce adhesion of debris on the flow passage groove, and can prevent flow passage blockage, so as to achieve the purpose of balling resistance, increase drilling efficiency of the drill, and reduce drilling cost.