BW250/50型泥浆泵有外型小、重量轻、泵量及泵压基本能满足一般岩心钻探的特点,但不适应在第四纪地层中钻进。主要缺陷是:①因泥浆粘度大,含砂量多、砂粒粗细不能控制在规定的技术要求范围内,加上钻孔口径大破碎岩粉多,使泥浆中砂子的含量大大增多,往往大于30％,造成陶瓷 BW250 / 50 mud pump has the appearance of small, light weight, pump and pump pressure to meet the basic characteristics of the general core drilling, but not suitable for drilling in Quaternary formations. The main defects are: (1) due to mud viscosity, sand content and sand thickness can not be controlled within the specified technical requirements, coupled with the large diameter of the bore hole crushed stone, the sand content in the mud greatly increased, often greater than 30 %, Resulting in ceramic