Hole-broadening drill

The utility model relates to a hole-broadening drill. The hole-broadening drill comprises a drill body. Reaming blocks and water guide grooves are alternately arranged on the outer wall of the drill body. The outer wall of each reaming block is provided with reaming protrusions. The joint between ea...

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Bibliographic Details
Main Authors BAO XINYI, SU GANG, YAO FENGLEI
Format Patent
LanguageEnglish
Published 04.02.2015
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
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Summary:The utility model relates to a hole-broadening drill. The hole-broadening drill comprises a drill body. Reaming blocks and water guide grooves are alternately arranged on the outer wall of the drill body. The outer wall of each reaming block is provided with reaming protrusions. The joint between each water guide groove and the outer wall of the drill body is provided with a chamfer. Compared with a straight-edge structure of a water flowing groove of a traditional drill, the chamfering structure enables water flow on the outer side of the drill to flow into the drill more conveniently, improves water guide efficiency, so that reaming and hole broadening through the reaming blocks are facilitated, and the drilling quality and efficiency are improved.
Bibliography:Application Number: CN20142513679U