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对大直径反循环平底钻头口转钻进井底冲洗液流速进行了研究，得出在模拟实验条件下，井底各点切向速度、径向速度及合速度的大小及钻头转速、冲洗液流量对井底流速的影响规律。
The research on the flow rate of bottom hole flushing fluid in the large diameter reverse circulation flat bottom drill port was made. Under the simulation experiment conditions, the tangential speed, radial velocity, combined speed and the bit rotation speed, Influence of Flow on Bottomhole Velocity.