公开(公告)号：US20110203796A1

公开(公告)日：2011-08-25

申请号：US12711945

申请日：2010-02-24

申请人： Abhijit Tarafdar ,  Dibyadarshani Senapati ,  Girish Dinkar Sarap ,  Rahul Chandrakant Patil

发明人： Abhijit Tarafdar ,  Dibyadarshani Senapati ,  Girish Dinkar Sarap ,  Rahul Chandrakant Patil

IPC分类号： E21B33/13 ,  C09K8/42

CPC分类号： C09K8/467 ,  C04B24/281 ,  C04B28/02 ,  C04B2103/0046 ,  C04B2103/22 ,  Y02W30/92 ,  C04B14/10 ,  C04B14/108 ,  C04B18/08 ,  C04B2103/0085 ,  C04B2103/10 ,  C04B2103/40 ,  C04B2103/42 ,  C04B2103/46 ,  C04B2103/50

摘要： Compositions and methods according to the invention are directed to a cement composition for use in a subterranean formation. The cement composition comprises: (A) cement; (B) water; and (C) a polymer, wherein the polymer: (i) comprises a monomer or monomers selected from the group consisting of epoxysuccinic acid, a substituted epoxysuccinic acid, and an alkali metal salt, alkaline earth metal salt, or ammonium salt of any of the foregoing, and any combination of any of the foregoing; (ii) has the following characteristics: (a) is water soluble; and (b) is biodegradable; and (iii) is capable of providing: (a) a thickening time of at least 2 hours for a test composition at a temperature of 190° F. and a pressure of 5,160 psi; and (b) an initial setting time of less than 24 hours for the test composition at a temperature of 217° F. and a pressure of 3,000 psi, wherein the test composition consists of 860 grams of Class-H Portland cement, 325 grams of deionized water, and 0.4% by weight of the cement of the polymer. The method comprises the steps of: (A) introducing the cement composition into the subterranean formation; and (B) allowing the cement composition to set after introduction into the subterranean formation.

摘要翻译： 根据本发明的组合物和方法涉及用于地下地层的水泥组合物。 水泥组合物包括：（A）水泥; （B）水; 和（C）聚合物，其中所述聚合物：（i）包含选自环氧琥珀酸，取代的环氧琥珀酸和碱金属盐，碱土金属盐或铵盐中的任何一种的单体或单体 前述内容，以及任何前述内容的任何组合; （ii）具有以下特征：（a）是水溶性的; 和（b）是可生物降解的; 和（iii）能够提供：（a）在190°F的温度和5,160psi的压力下对于测试组合物的至少2小时的增稠时间; 和（b）测试组合物在217°F的温度和3,000psi的压力下的初始凝固时间小于24小时，其中测试组合物由860克H类波特兰水泥，325克 去离子水和0.4重量％的聚合物的水泥。 该方法包括以下步骤：（A）将水泥组合物引入地层; 和（B）允许水泥组合物在引入地层之后凝固。