Haozhou Drilling Engineering Machinery (Shandong) Co., Ltd.

Yechun Zhao

Da Zhang

Yechen Zhao

Fengzheng Jing

Yeshui Zhao

Chengliang Yan

A full-hole reverse circulation cluster-type down-the-hole (DTH) hammer with multiple independent channels is provided. The DTH hammer includes a drill rod, a drill rod joint, a drill rod air pipe, a diversion chamber, at least one hammer, and an upper pressure plate, a lower pressure plate, and an upper outer hammer protection pipe for fixing the hammer, where at least one jet air pipe communicated with the diversion chamber and at least one drill cuttings discharge pipe are arranged between the hammers; lower ends of the jet air pipe and the drill cuttings discharge pipe are located close to a hammer drill bit; and the lower end of the jet air pipe is provided with jet holes for producing a negative pressure.

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Jinan, China

Yechun Zhao