中国专利局1989年2月9日公布授予我院申请的“旋转驴头增距式长冲程抽油机”项目实用新型专利权(专利号:88202313.6)。这是我院继“模拟钻井泥浆动失水仪”获专利权后获得的第二项专利权。该项目是由我院机械系孔昭瑞教授、李明信工程师设计提出,石油工业服务中心江汉石油学院代理 On February 9, 1989, the Chinese Patent Office announced the patent for utility model of “Rotating donkey head distance-increasing long-stroke pumping unit” applied to our hospital (Patent No. 88202313.6). This is our hospital following the “simulated drilling mud loss of water meter,” won the second patent after the patent. The project is designed by Professor Kong Zhaorui, Department of Mechanical Engineering, Li Mingxin engineer, Petroleum Industry Service Center, Jianghan Petroleum Institute