公开(公告)号：US09150777B2

公开(公告)日：2015-10-06

申请号：US14526764

申请日：2014-10-29

Applicant: Baker Hughes Incorporated

Inventor： James B. Crews ,  Tianping Huang

IPC: C09K8/584 ,  C09K8/68 ,  C09K8/66 ,  C09K8/60

CPC classification number: C09K8/584 ,  C09K8/602 ,  C09K8/68 ,  C09K2208/26 ,  C09K2208/30

Abstract: Fluids viscosified with viscoelastic surfactants (VESs) may have their viscosities reduced (gels broken) by the direct or indirect action of an internal breaker composition that contains at least one mineral oil, at least one polyalphaolefin oil, at least one saturated fatty acid and/or at least one unsaturated fatty acid. The internal breaker may initially be dispersed oil droplets in an internal, discontinuous phase of the fluid. In one non-limiting embodiment, the internal breaker, e.g. mineral oil, is added to the fluid after it has been substantially gelled. An oil-soluble surfactant is present to enhance or accelerate the reduction of viscosity of the gelled aqueous fluid.

Abstract translation: 用粘弹性表面活性剂（VES）粘稠的流体可以通过含有至少一种矿物油，至少一种聚α-烯烃油，至少一种饱和脂肪酸和/或其混合物的内部破碎剂组合物的直接或间接作用使其粘度降低（凝胶破裂） 或至少一种不饱和脂肪酸。 内部破碎机最初可以将油滴分散在流体的内部不连续相中。 在一个非限制性实施例中，内部断路器，例如， 矿物油在其已基本凝胶化之后加入到流体中。 存在油溶性表面活性剂以增强或加速胶凝水性流体的粘度降低。