China TSINGTAO HAINUOAO OILFIELD MACHINERY Co., Ltd has always been dedicated to the research and production of mud pump fluid end expendables to customers all over the world. The Products are designed to fit mud pumps of Emsco, Gardner- Denver, National, Oilwell, Ideco, Skytop/Brewester, as well as OPI, Wirth, Wilson and Gaso.