It is a big change to conventional way of drilling mud circulation.
是常规钻井泥浆循环方式的重大变革。
The utility model relates to a pump valve of a well drilling mud pump.
本实用新型涉及钻井泥浆泵的泵阀。
However, the disposal of drilling mud has remained a difficult problem in drilling method.
钻井法目前已广泛应用于矿山建设工程，但钻井泥浆的处理一直是钻井法难点问题之一。
钻井泥浆处理剂。
钻井泥浆处理剂。
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