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    • 3. 发明申请
    • CEMENTING COMPOSITION COMPRISING ANIONICALLY - AND HYDROPHOBICALLY-MODIFIED CELLULOSE ETHERS AND ITS USE
    • 包含阴离子和疏水改性纤维素的组合物及其用途
    • WO2013049094A1
    • 2013-04-04
    • PCT/US2012/057177
    • 2012-09-26
    • DOW GLOBAL TECHNOLOGIES LLCWITHAM, Cole, A.POINDEXTER, Michael, K.KUHLMAN, Roger, L.
    • WITHAM, Cole, A.POINDEXTER, Michael, K.KUHLMAN, Roger, L.
    • C04B24/38C04B28/02C09K8/487C04B103/46
    • C09K8/487C04B24/383C04B28/02C04B28/04E21B33/14C04B24/22C04B2103/408C04B2103/46
    • Disclosed is a composition and a method for cementing a casing in a borehole of a well using an aqueous cementing composition comprising (a) water, (b) a cementing composition comprising (i) a hydraulic cement, (ii) an anionically- and hydrophobically- modified polymer, (iii) a dispersant, and optionally (iv) one or more other additives conventionally added to aqueous cementing compositions useful in cementing casings in the borehole of wells. Preferably the anionically- and hydrophobically-modified hydroxyethyl cellulose has an ethylene oxide molar substitution of from 0.5 to 3.5, a hydrophobe degree of substitution of from 0.001 to 0.025, an anionic degree of substitution of from 0.001 to 1, and a weight-average molecular weight of from 100,000 to 4,000,000 Daltons and the dispersant is sulfonated polymer, melamine formaldehyde condensate, a naphthalene formaldehyde condensate, a branched or non-branched polycarboxylate polymer. Preferably, the aqueous cementing composition is pumped downwardly into said casing, pumping upwardly into the annulus surrounding said casing until said aqueous composition fills that portion of the annular space desired to be sealed, and then maintaining said aqueous cementing composition in place until the cement sets.
    • 公开了一种组合物和方法,用于使用水性胶结剂组合物将井筒固定在井眼中,所述组合物包括(a)水,(b)粘合剂组合物,其包含(i)水硬性水泥,(ii)阴离子和疏水性 - 改性聚合物,(iii)分散剂,和任选地(iv)一种或多种其它常规添加到水泥固井组合物中的其它添加剂,可用于固井在井眼中。 优选地,阴离子和疏水改性的羟乙基纤维素的环氧乙烷摩尔取代度为0.5-3.5,疏水取代度为0.001至0.025,阴离子取代度为0.001至1,重均分子量 重量为100,000至4,000,000道尔顿,分散剂为磺化聚合物,三聚氰胺甲醛缩合物,萘甲醛缩合物,支链或非支化聚羧酸酯聚合物。 优选地,将水性胶结剂组合物向下泵送到所述壳体中,向上泵送进入围绕所述壳体的环空中,直到所述含水组合物填充期望密封的环形空间的那部分,然后将所述水性固井组合物保持在适当位置,直到水泥组 。