Viscoelastic compositions
    4.
    发明授权
    Viscoelastic compositions 有权
    粘弹性组合物

    公开(公告)号:US08785355B2

    公开(公告)日:2014-07-22

    申请号:US12466411

    申请日:2009-05-15

    IPC分类号: C09K8/532

    摘要: The present invention provides aqueous viscoelastic compositions comprising a cleavable anionic surfactant which is a sulphonate and possibly also an electrolyte. The cleavable surfactants useful in the present invention comprise a chemical bond, which is capable of being broken under appropriate conditions, to produce oil soluble and water soluble products typically having no interfacial properties and surface activity compared with the original surfactant molecule. Further, the rheological properties of the aqueous viscoelastic composition are usually altered upon cleavage of the cleavable surfactant generally resulting in the elimination of the viscosifying, viscoelastic and surfactant properties of the composition. Aqueous viscoelastic compositions in accordance with the present invention are suitable for use in oil-field applications, particularly for hydraulic fracturing of subterranean formations. Thus, the present invention also relates to a wellbore service fluid and a method of fracturing a subterranean formation.

    摘要翻译: 本发明提供含有可分解阴离子表面活性剂的水性粘弹性组合物,其是磺酸盐,也可能是电解质。 可用于本发明的可切割表面活性剂包含能够在合适条件下破碎的化学键,以产生与原始表面活性剂分子相比通常不具有界面性质和表面活性的油溶性和水溶性产物。 此外,水解粘弹性组合物的流变性通常在切割可切割表面活性剂时改变,通常导致组合物的增粘,粘弹性和表面活性剂的消除。 根据本发明的水性粘弹性组合物适用于油田应用,特别是用于地下地层的水力压裂。 因此,本发明还涉及井筒服务流体和压裂地层的方法。

    VISCOELASTIC COMPOSITIONS
    5.
    发明申请
    VISCOELASTIC COMPOSITIONS 有权
    粘弹性组合物

    公开(公告)号:US20090291864A1

    公开(公告)日:2009-11-26

    申请号:US12466411

    申请日:2009-05-15

    IPC分类号: C23F11/14 C11D1/28

    摘要: The present invention provides aqueous viscoelastic compositions comprising a cleavable anionic surfactant which is a sulphonate and possibly also an electrolyte. The cleavable surfactants useful in the present invention comprise a chemical bond, which is capable of being broken under appropriate conditions, to produce oil soluble and water soluble products typically having no interfacial properties and surface activity compared with the original surfactant molecule. Further, the rheological properties of the aqueous viscoelastic composition are usually altered upon cleavage of the cleavable surfactant generally resulting in the elimination of the viscosifying, viscoelastic and surfactant properties of the composition. Aqueous viscoelastic compositions in accordance with the present invention are suitable for use in oil-field applications, particularly for hydraulic fracturing of subterranean formations. Thus, the present invention also relates to a wellbore service fluid and a method of fracturing a subterranean formation.

    摘要翻译: 本发明提供含有可分解阴离子表面活性剂的水性粘弹性组合物,其是磺酸盐,也可能是电解质。 可用于本发明的可切割表面活性剂包含能够在合适条件下破碎的化学键,以产生与原始表面活性剂分子相比通常不具有界面性质和表面活性的油溶性和水溶性产物。 此外,水解粘弹性组合物的流变性通常在切割可切割表面活性剂时改变,通常导致组合物的增粘,粘弹性和表面活性剂的消除。 根据本发明的水性粘弹性组合物适用于油田应用,特别是用于地下地层的水力压裂。 因此,本发明还涉及井筒服务流体和压裂地层的方法。

    Measurement of hydrogen sulphide and thiols in fluids
    10.
    发明授权
    Measurement of hydrogen sulphide and thiols in fluids 有权
    测量流体中的硫化氢和硫醇

    公开(公告)号:US08268146B2

    公开(公告)日:2012-09-18

    申请号:US12797148

    申请日:2010-06-09

    摘要: A wellbore tool has an electrochemical sensor for measuring the amount of hydrogen sulphide or thiols in a fluid downhole in a wellbore. The sensor comprises a temperature- and pressure-resistant housing containing a flow path for the fluids. The fluids flow over one side of a gas permeable membrane the other side of the membrane being exposed to a chamber containing at least two electrodes and containing a reaction solution which together with the hydrogen sulphide or thiols create a redox reaction resulting in an electrical current dependent upon the amount of hydrogen sulphide or thiols in the fluid. Measurement is made by passing formation fluid along the flow path and repeatedly applying varying potential to one electrode and measuring the peak current flowing between that electrode and a second electrode.

    摘要翻译: 井眼工具具有用于测量井眼中井下液体中硫化氢或硫醇的量的电化学传感器。 传感器包括耐温和耐压壳体,其容纳流体的流动路径。 流体在气体可渗透膜的一侧流动,膜的另一侧暴露于含有至少两个电极的室中,并且含有与硫化氢或硫醇一起产生氧化还原反应的反应溶液,导致电流依赖 在流体中的硫化氢或硫醇的量。 通过使流体流动沿流动路径并且重复地向一个电极施加变化的电位并测量在该电极和第二电极之间流动的峰值电流来进行测量。