Removal of water-based drilling fluids from downhole surfaces
    5.
    发明公开
    Removal of water-based drilling fluids from downhole surfaces 审中-公开
    Bohrloch博士

    公开(公告)号:EP1391580A2

    公开(公告)日:2004-02-25

    申请号:EP03252719.4

    申请日:2003-04-30

    IPC分类号: E21B43/22 E21B37/06

    摘要: Water-based drilling fluids are removed from downhole surfaces in a well bore, leaving the surfaces water-wet, by contacting the surfaces with a water-based removal solution comprised of water and a mixture of a sulfonated kraft lignin salt and an N-methyl-N-oleyltaurine salt dissolved therein is provided. The solution can be used as a spacer between drilling fluid and a cementing composition.

    摘要翻译: 将水基钻井液从井眼的井下表面上除去,使表面水润,通过使表面与由水和磺化硫酸盐木质素盐和N-甲基的混合物组成的水基去除溶液接触 提供溶解于其中的-N-油基牛磺酸盐。 该溶液可用作钻井液和固井组合物之间的间隔物。