Well drilling fluids and process for drilling wells
    1.
    发明授权
    Well drilling fluids and process for drilling wells 失效
    井钻井液和钻井工艺

    公开(公告)号:US4812244A

    公开(公告)日:1989-03-14

    申请号:US100460

    申请日:1987-09-24

    IPC分类号: C09K8/24 C09K7/02

    CPC分类号: C09K8/24

    摘要: The rheological characteristics of aqueous well drilling fluids are improved by incorporating into the fluids small amounts of sulfonated styrene-maleimide copolymers and at least one water-soluble polymer prepared from acrylic acid or acrylate or their derivatives.

    摘要翻译: 通过向流体中加入少量的磺化苯乙烯 - 马来酰亚胺共聚物和至少一种由丙烯酸或丙烯酸酯或其衍生物制备的水溶性聚合物,改善了水性钻井液的流变特性。

    Well drilling fluids and process for drilling wells
    2.
    发明授权
    Well drilling fluids and process for drilling wells 失效
    井钻井液和钻井工艺

    公开(公告)号:US4740318A

    公开(公告)日:1988-04-26

    申请号:US808715

    申请日:1985-12-13

    IPC分类号: C09K8/24 C09K7/02

    CPC分类号: C09K8/24

    摘要: The rheological characteristics of aqueous well drilling fluids are improved by incorporating into the fluids small amounts of sulfonated styrene-maleic anhydride copolymers and at least one water-soluble polymer prepared from acrylic acid or acrylamide or their derivatives.

    摘要翻译: 通过在流体中加入少量的磺化苯乙烯 - 马来酸酐共聚物和至少一种由丙烯酸或丙烯酰胺或其衍生物制备的水溶性聚合物,改善了水性钻井液的流变特性。

    Restoring lost circulation
    7.
    发明授权
    Restoring lost circulation 失效
    恢复流失

    公开(公告)号:US5325922A

    公开(公告)日:1994-07-05

    申请号:US964819

    申请日:1992-10-22

    IPC分类号: E21B21/00 E21B33/13

    CPC分类号: E21B21/003

    摘要: Method for restoring drilling fluid circulation to a borehole having strata being invaded by the drilling fluid, by circulating a non-conventional cementitious slurry such as drilling fluid-blast furnace slag mixture into the strata, and allowing the mixture to solidify in situ.

    摘要翻译: 将钻井液循环恢复到具有由钻井液侵入地层的钻孔的方法,通过将诸如钻井液 - 高炉渣混合物的非常规水泥浆循环到地层中,并允许混合物原位固化。