Invert emulsion drilling fluid containing a hygroscopic liquid and a polymeric suspending agent
    1.
    发明授权
    Invert emulsion drilling fluid containing a hygroscopic liquid and a polymeric suspending agent 有权
    含有吸湿性液体和聚合物悬浮剂的反相乳液钻井液

    公开(公告)号:US09376608B2

    公开(公告)日:2016-06-28

    申请号:US13187170

    申请日:2011-07-20

    IPC分类号: C09K8/12 C09K8/36

    CPC分类号: C09K8/12 C09K8/36

    摘要: According to an embodiment, an invert emulsion drilling fluid comprises: an external phase, wherein the external phase of the drilling fluid comprises a hydrocarbon liquid; an internal phase, wherein the internal phase of the drilling fluid comprises a hygroscopic liquid; and a suspending agent, wherein the suspending agent is a polymer comprising urea linkages or urea and urethane linkages. According to certain embodiments, the hygroscopic liquid comprises a salt and a suitable solvent. According to other embodiments, the hygroscopic liquid comprises an alcohol. In certain embodiments, the drilling fluid does not contain an organophilic clay or organophilic lignite. According to another embodiment, a method of using the invert emulsion drilling fluid comprises: introducing the drilling fluid into at least a portion of a subterranean formation.

    摘要翻译: 根据一个实施例,反相乳液钻井流体包括:外部相,其中钻井液的外部相包括烃液体; 内部相,其中所述钻井液的内相包括吸湿液体; 和悬浮剂,其中所述悬浮剂是包含脲键或尿素和氨基甲酸酯键的聚合物。 根据某些实施方案,吸湿性液体包含盐和合适的溶剂。 根据其他实施方案,吸湿性液体包含醇。 在某些实施方案中,钻井液不含亲有机粘土或有机褐煤。 根据另一个实施例,使用反相乳液钻井液的方法包括:将钻井流体引入至地下地层的至少一部分。