Cave drill bit is expanded in coal mining

• Main Authors: LU SHOUGANG, WANG HONGCUN, JING HUI, YANG WAIMING, LI YONGLI, QI FULI, LI SICAI, ZHANG MENGCAI
• Format: Patent
• Language: English
• Published: 25.11.2015
• 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

Cave drill bit is expanded in coal mining belongs to the drilling engineering technique, installation screw rod -type connects on the center part of board -like cutter body upper end, and a round pin axle is installed separately to the difference of symmetry on the face of the relative both sides of board -like cutter body but two round pins epaxially install board -like wing respectively through bearing symmetry and wobbling, solid supporting role describes the alloy land on board -like wing outward flange and end the edge, on the face of the relative both sides of board -like cutter body, the upside position punishment that lies in two board -like wings do not installs and put the extreme position baffle, this drill bit simple structure, manufacturing cost and use cost are cheap, use the operation simple and easy convenient, and work quality is good, and service problem is few, especially adapts to to use under the softer condition of geology such as coal class.