一、前言近年来,随着企业经济体制的改革和经济责任制的贯彻落实,钻井成本问题引起了各方面的重视。钻井工程既要保证钻孔的工程质量,还要有较高的钻进效率和经济效益。只有不断地降低钻井成本,将钻井费用降至最低,才能多快好省地完成水文地质勘察和钻井任务,满足国民经济发展对地下水 I. Introduction In recent years, with the reform of the economic structure of the enterprises and the implementation of the economic responsibility system, the issue of drilling costs has drawn great attention from all quarters. Drilling engineering should not only ensure the quality of the drilling, but also have a higher drilling efficiency and economic benefits. Only by continuously reducing drilling costs and drilling costs to a minimum can we accomplish hydrological and geological exploration and drilling tasks more quickly and efficiently to meet the needs of the development of the national economy for groundwater