| 摘要 |
This invention describes a reaming tool ( 10 ) for attachment to a drill string having a body ( 12 ) that has connection means ( 14 a, 14 b) at either end for attachment to a drill string, at least one roller reamer ( 16 ) rotatably mounted to the body ( 12 ), and at least one channel ( 18 ) extending on the body positioned to intersect with the roller reamer ( 16 ). This ensures that flushing fluid flow is directed to each roller reamer ( 16 ).
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