The utility model discloses a downhole drilling hole dust prevention device, which is characterized in that the sleeve is arranged in the dust hole drilling, drill pipe along the axial direction through the dust in the dust prevention sleeve; the sleeve, by block along the axial direction is divided into zones and in return slag on the other side of the side hole drilling dust area; in the area of the return slag dust sleeve is arranged at the bottom of the slag outlet; in the area of dust dust sleeve is arranged at the bottom of the outlet, the spray system is arranged on the upper sleeve of dust dust dust in the area, the sleeve is installed at the end of the end cover. The utility model can effectively carry out dust removal at the orifice, avoid dust diffuse in the well, and can protect the drilling personnel when the drilling hole is sprayed out, and prevent the occurrence of a serious accident.
【技术实现步骤摘要】
【技术保护点】
１．一种井下钻孔孔口灭尘装置，其特征是在钻孔孔口上设置灭尘套筒（１０），钻杆（１２）沿轴向贯穿灭尘套筒（１０）；在所述灭尘套筒（１０）内，由挡块（６）沿轴向分隔为处在钻孔孔口所在一侧的返渣区和另一侧的灭尘区；在所述返渣区的灭尘套筒（１０）的底部设置有出渣口（４）；在所述灭尘区的灭尘套筒（１０）的底部设置有出水口（７），在所述灭尘区的灭尘套筒（１０）的上半部设置喷雾系统，在所述灭尘套筒（１０）的尾部设置端盖（１１）。
【技术特征摘要】
【专利技术属性】
技术研发人员：罗惠林，张纯如，冯震，
申请(专利权)人：淮南矿业集团有限责任公司，
类型：实用新型
国别省市：34
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