改变水泥浆或处理液的设计性能的一种化学剂或流体。
A chemical or fluid that alters the performance of an engineered slurry or treatment fluid.
在钻井中负责泥浆测试，并负责泥浆处理而使泥浆重量、性能和化学性质保持在规定范围内的工作人员。
A person responsible for testing the mud at a rig and for prescribing mud treatments to maintain mud weight, properties and chemistry within recommended limits.
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