Deflecting and reaming drilling rig

The utility model relates to a deflecting and reaming drilling rig which comprises a drilling rig body. The drilling rig body comprises a plurality of drill bits which are sequentially arranged from top to bottom and from large to small, the adjacent drill bits are fixedly connected through connecti...

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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 deflecting and reaming drilling rig which comprises a drilling rig body. The drilling rig body comprises a plurality of drill bits which are sequentially arranged from top to bottom and from large to small, the adjacent drill bits are fixedly connected through connecting rods, and the drill bit at the uppermost end is fixedly connected with a drill stem through a connecting sleeve. When the deflecting and reaming drilling rig is used for drilling, due to the fact that the drill bit at the lowermost end is small, the deflecting and reaming drilling rig can deflect and turns to avoid a hard stratum point when meeting the hard stratum point, accidents are avoided, damage to the drill bits and deformation of the drill stem are avoided, and the working reliability and safety are improved.
Bibliography:Application Number: CN20142507418U