Long spiral drill bit for drilling machine

• Main Authors: GAO YANG, XIONG ZHENGUO, WANG XIUTING, HUANG KUI, TANG CHANGYAO, WANG YONG
• Format: Patent
• Language: Chinese; English
• Published: 13.10.2023
• 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

A mounting seat is arranged on the end face of a drill bit body, a spiral piece is arranged on the peripheral face of the drill bit body, and alloy drill bits are detachably mounted on the front end face of the mounting seat and the front surface of the spiral piece through mounting assemblies. The mounting assembly comprises a base, a connecting cylinder is obliquely and fixedly arranged on the front side of the base, the downward end of the connecting cylinder is closed, the upward end of the connecting cylinder is open, a counter bore is formed in the opening, a threaded hole communicated with the counter bore is formed in the opening, a threaded head is in threaded fit in the threaded hole, a protection plate is matched in the counter bore, and the inner side and the outer side of the protection plate are fixedly connected with the threaded head and the alloy drill bit respectively. And a sealing ring is sleeved on the thread head and is pressed on the inner end surface of the counter bore by a protection