Combined down-the-hole hammer

• Main Authors: MU DI, CHEN YONG, GAO YI, KANG WENBO, YIN WENDE
• Format: Patent
• Language: Chinese; English
• Published: 17.10.2012
• 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 combined down-the-hole hammer, which comprises a single hammer, an annular frame, a slag-return exhaust sleeve, a slag discharge pipe and an input shaft, wherein the annular frame adopts an annular structure, a plurality of uniformly distributed through holes are arranged on the annular frame, and the single hammer is fixed; an upper end of the input shaft is connected with a drilling rod, a lower end of the input shaft is connected with a flange on the annular frame to transfer torsional moment; the slag discharge pipe is arranged above the annular frame, a lower end surface of the slag discharge pipe is connected with an upper end of the single hammer, and an upper end surface is connected with the slag-return exhaust sleeve. The combined down-the-hole hammer can be cooperated with such as a tube driller, the area of the rocks to be broken by impact is greatly reduced, the drilling efficiency is improved, and compared with the single large-diameter down-the-hole hammer, the pro