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在地质勘探工作中，由于钻孔的孔身结构、钻具配套、机械钻进速度及所钻岩层性质、冲洗液比重、粘度等一系列差异，所需的冲洗液量也是不同的；再则，小口径金刚石钻进、大口径合金或钢粒钻进以及不取岩心的全面钻进对水量的要求也不一样，因而要求泥浆泵的排量可以调节和变化，以满足不同口径、不同孔深、不同地层的钻进需要，加快钻进速度，提高钻进效率。
In the geological exploration work, the amount of flushing fluid required is also different due to a series of differences such as the hole structure of the borehole, the matching of the drilling tool, the speed of the mechanical drilling, the nature of the rock to be drilled, the specific gravity and the viscosity of the washer liquid, and so on , Small-diameter diamond drilling, large-diameter alloy or steel grain drilling and drilling do not take the core of the water requirements are not the same, thus requiring mud pump displacement can be adjusted and changes to meet the different caliber, different holes Deep, different strata drilling needs to speed up the drilling speed, improve drilling efficiency.