公开(公告)号：US10774257B2

公开(公告)日：2020-09-15

申请号：US16129177

申请日：2018-09-12

申请人： China Petroleum & Chemical Corporation ,  SINOPEC Research Institute of Petroleum Engineering

发明人： Yongxue Lin ,  Xiaohua Yang ,  Lin Wang ,  Jian He ,  Junbin Jin ,  Fan Yang ,  Haibo Wang

IPC分类号： C09K8/24 ,  C08F293/00 ,  C08F220/56

摘要： A random copolymer, a preparation method of the random copolymer, a drilling fluid containing the random copolymer. The random copolymer contains structural unit (A) represented by formula (1), structural unit (B) represented by formula (2), structural unit (C) represented by formula (3), and structural unit (D) represented by formula (4) or (5): wherein X is halogen. When the random copolymer is used as a filter loss reducer in a high-calcium drilling fluid, the filter loss of the high-calcium drilling fluid can be reduced.

公开(公告)号：US10538484B1

公开(公告)日：2020-01-21

申请号：US16129285

申请日：2018-09-12

申请人： China Petroleum & Chemical Corporation ,  SINOPEC Research Institute of Petroleum Engineering

发明人： Xiaohua Yang ,  Yongxue Lin ,  Jian He ,  Lin Wang ,  Haibo Wang ,  Fan Yang ,  Zhoujun Li ,  Xiaoqiang Dong

IPC分类号： C07C235/28 ,  C07H5/04 ,  C07C231/02 ,  C07C309/21 ,  C07C309/29 ,  C07C235/30

摘要： A maleamic acid monomer, and a preparation method and a use of the maleamic acid monomer. The structural formula of the monomer is as follows: formula (1), wherein, R is selected from The maleamic acid monomer provided in the present invention may be used as a comonomer to prepare temperature-tolerant and calcium salt-tolerant polymers.

公开(公告)号：US20140186626A1

公开(公告)日：2014-07-03

申请号：US14031366

申请日：2013-09-19

申请人： SINOPEC RESEARCH INSTITUTE OF PETROLEUM ENGINEERING ,  CHINA PETROLEUM & CHEMICAL CORPORATION

发明人： Zhifa WANG ,  Zhi Yang ,  Yongxue Lin ,  Xiaohua Yang ,  Jiang Xu ,  Long Chai ,  Zhoujun Li ,  Guo Zhang ,  Yang Xu ,  Haibo Wang ,  Yong Kong

IPC分类号： C09K8/035

CPC分类号： C09K8/035 ,  C08B31/12 ,  C09K8/04 ,  C09K8/50 ,  C09K8/57 ,  C09K8/62 ,  Y10T428/2982

摘要： The present invention provides a modified starch, preparation method and use of the same, also provides a drilling fluid comprising the modified starch which contains bi-substituted starch structural units and tri-substituted starch structural units, wherein, the tri-substituted starch structural units are represented by the following formula (1), the bi-substituted starch structural units are the structural units represented by the following formula (2) and/or the structural units represented by the following formula (3), and the total content of the bi-substituted starch structural units and tri-substituted starch structural units accounts for 20 wt % or more of the modified starch, preferably 20-30 wt %, the weight-average molecular weight of the etherified starch is 50,000-600,000, preferably 80,000-580,000, wherein, R1, R2, and R3 are C1-C5 alkylene respectively, and M1, M2, and M3 are H, alkali metal element, or alkaline earth metal element respectively.

摘要翻译： 本发明提供了改性淀粉及其制备方法及用途，还提供了含有二取代淀粉结构单元和三取代淀粉结构单元的改性淀粉的钻井液，其中，三取代淀粉结构单元 由下式（1）表示，双取代淀粉结构单元是由下式（2）表示的结构单元和/或下式（3）表示的结构单元， 二取代淀粉结构单元和三取代淀粉结构单元占改性淀粉的20重量％或更多，优选20-30重量％，醚化淀粉的重均分子量为50,000-600,000，优选80,000- 580,000，其中R1，R2和R3分别为C1-C5亚烷基，M1，M2和M3分别为H，碱金属元素或碱土金属元素。