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发明名称
ROLLER BIT WITH COLLIMATED JETS SWEEPING SEPARATE BOTTOM-HOLE TRACKS
摘要
<p>A roller cone jet-type drill bit with nozzles which direct collimated streams of mud at different angles, to sweep different radii of the hole bottom.</p>
申请公布号
WO2000019055(A1)
申请公布日期
2000.04.06
申请号
US1999022434
申请日期
1999.09.28
申请人
发明人
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主分类号
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