High viscosity crosslinked gelled alcohol
    4.
    发明授权
    High viscosity crosslinked gelled alcohol 失效
    高粘度交联胶凝醇

    公开(公告)号:US5874385A

    公开(公告)日:1999-02-23

    申请号:US962219

    申请日:1997-10-31

    IPC分类号: C09K8/68 E21B43/17 C09K3/00

    CPC分类号: C09K8/685

    摘要: A fracturing fluid composition for use in fracturing underground formations, such as oil or gas wells is described. It includes at least one anhydrous aliphatic alcohol, a modified guar gum polymer, and as a complexor, a sodium borate salt. A gel breaker which acts over a time period to degrade the guar gum cross linked polymer and thereby reduce the viscosity of the gel is provided as well to aid in the removal thereof from an oil or gas well that has been fractured by application of the fluid under pressure.

    摘要翻译: 描述了用于压裂地下地层(如油井或气井)的压裂液组合物。 它包括至少一种无水脂族醇,改性瓜尔胶聚合物和作为络合剂的硼酸钠盐。 提供了在一段时间内作用以降解瓜尔胶交联聚合物并因此降低凝胶粘度的凝胶破乳剂,以帮助将其从已经通过施加流体破裂的油或气井中除去 在压力之下。

    Foamed nitrogen in liquid CO2 for fracturing
    5.
    发明授权
    Foamed nitrogen in liquid CO2 for fracturing 有权
    在液体CO2中发泡氮气用于压裂

    公开(公告)号:US06729409B1

    公开(公告)日:2004-05-04

    申请号:US09857827

    申请日:2001-10-05

    IPC分类号: E21B4326

    CPC分类号: C09K8/703 C09K8/38

    摘要: A method for fracturing subterranean formations surrounding oil and gas wells using a fracturing fluid consisting of a foam constituted by a liquid phase and a gaseous phase. The liquid phase has a foam forming substance dissolved therein. The foam forming substance is preferably a surfactant such as a non-ionic hydrofluoroether surfactant. The liquid phase is preferably CO2 and the gaseous phase N2.

    摘要翻译: 使用由液相和气相构成的泡沫构成的压裂液压裂围绕油气井的地下地层的方法。 液相中溶解泡沫形成物质。 泡沫形成物质优选为非离子性氢氟醚表面活性剂等表面活性剂。 液相优选为二氧化碳和气相N2。