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井斜角 30°～ 6 0°的斜井段易形成岩屑床 ,其形成后难以清除 ,不稳定易向井底方向滑动 ,影响钻进速度、威胁钻井施工安全 ,是定向井施工中井眼净化的危险区。介绍江苏局安徽公司现阶段提高大斜度定向井井眼净化程度的系列技术措施 ,由于受其有效程度所限偶发井下复杂情况和事故。在关注大斜度定向井井眼净化的同时 ,研究开发出“融清除岩屑床与钻进为一体的新工艺技术” ,作为技术储备。文中介绍该工艺技术的技术要点 ,论证其技术优势及可行性、经济性。
It is easy to form a cuttings bed in the inclined well with a well angle of 30 ° ~ 60 °, which is difficult to remove after it is formed. The instability easily slides toward the bottom hole, affecting the drilling speed and threatening the drilling safety. Danger zone This article introduces a series of technical measures to improve the degree of decontamination of high-angle directional wellbore at the current stage of Anhui Bureau of Jiangsu Bureau. Due to the complexity and accident of underground spouts due to its effective extent, While paying attention to the decontamination of high-angle directional wellbore, the research and development of “a new process technology that integrates the removal of cuttings beds and drilling into one” has been researched and developed as a technical reserve. The article describes the technical points of the technology, demonstrate its technical advantages and feasibility, economy.