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公开(公告)号：US20160289548A1
公开(公告)日：2016-10-06
申请号：US15178140
申请日：2016-06-09
Applicant: BAKER HUGHES INCORPORATED
Inventor： Qi Qu , Leiming Li , Hong Sun , Magnus Legemah , Jia Zhou
IPC: C09K8/68 , E21B43/26 , E21B43/267 , C09K8/88
CPC classification number: C09K8/685 , C09K8/70 , C09K8/887 , C09K2208/26 , E21B43/25 , E21B43/26 , E21B43/267
Abstract: A method includes forming a well treatment fluid by combining an aqueous fluid, a viscosifying agent, a crosslinker, and a rheology modifier containing an aldehyde. The viscosifying agent is crosslinked, increasing viscosity of the fluid. The method includes treating a well with the fluid exhibiting the increased viscosity, chemically changing the aldehyde after the crosslinking and thereby forming an acid, and decreasing viscosity of the crosslinked fluid as a result of forming the acid. The aldehyde may be glyoxal which forms oxalic acid, breaking a crosslink. A well treatment fluid is formulated with ingredients including an aqueous fluid and a viscosifying agent and a crosslinker configured to crosslink the viscosifying agent. The fluid includes a rheology modifier containing an aldehyde. The fluid may lack an aldehyde crosslinking delay additive.
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公开(公告)号：US20130220621A1
公开(公告)日：2013-08-29
申请号：US13736799
申请日：2013-01-08
Applicant: Baker Hughes Incorporated
Inventor： Magnus Legemah , Hong Sun , Michael Guerin
Abstract: Polyboronic compounds useful as delayed crosslinking agents may be produced by using a polyamine as base scaffold and incorporating boron via reaction with intermediate borates which may be formed in the condensation reaction between boric acid and a diol. A di-aldehyde, such as glyoxal, may be introduced following caustic treatment of the reaction mixture of polyaminoboronate to form the polyboronic compound.
Abstract translation: 可用作延迟交联剂的多硼化合物可以通过使用多胺作为基础支架并通过与可能在硼酸和二醇之间的缩合反应中形成的中间体硼酸盐反应引入硼来制备。 可以在苛性碱处理聚氨基硼酸盐的反应混合物以形成多硼化合物之后引入二醛，例如乙二醛。
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