Nearly drill bit reamer

The utility model relates to a nearly drill bit reamer, the central authorities of reamer body have along the fluid passage of its axial through front end and rear end, evenly be equipped with on the lateral wall all around of reamer body and a plurality ofly link up in fluid passage's installa...

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Hauptverfasser: ZHU YINGJIE, ZHANG YE, SHAO QIANG, WANG JUN, GENG LI, LYU MINGJIE, HAN FEI, JI YOUZHE, WANG XUE, LIANG GUOHONG
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creator ZHU YINGJIE
ZHANG YE
SHAO QIANG
WANG JUN
GENG LI
LYU MINGJIE
HAN FEI
JI YOUZHE
WANG XUE
LIANG GUOHONG
description The utility model relates to a nearly drill bit reamer, the central authorities of reamer body have along the fluid passage of its axial through front end and rear end, evenly be equipped with on the lateral wall all around of reamer body and a plurality ofly link up in fluid passage's installation space, install reaming device among each installation space respectively. Reaming device includes enlarger and protecting cover, the protecting cover is fixed on reamer body outer wall, and the enlarger can be provided in the corresponding protecting cover to the reamer body circumference outside under the effect that receives well drilling hydraulic pressure force with stretching out. Fluid passage's rear end be equipped with with bumping of dropping into press the ball keep off suppress in fluid passage pressures, and the seat valve formula that makes the drilling fluid pass through of sliding backward bump pressure ball backstop device. The utility model discloses can according to particular case select reaming hole operation mode or while creeping into reaming hole operation mode, the reaming hole is effectual.
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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
title Nearly drill bit reamer
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