公开(公告)号：US4933378A

公开(公告)日：1990-06-12

申请号：US390575

申请日：1989-08-07

申请人： Clare H. Kucera ,  Stefano C. Crema ,  Michael D. Roznowski ,  Gerd Konrad ,  Heinrich Hartman

发明人： Clare H. Kucera ,  Stefano C. Crema ,  Michael D. Roznowski ,  Gerd Konrad ,  Heinrich Hartman

IPC分类号： C04B24/26 ,  C04B28/02 ,  C09K8/46

CPC分类号： C04B24/2652 ,  C04B28/02 ,  C09K8/487

摘要： A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a copolymer of acrylamide/vinyl imidazole and derivatives thereof in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

公开(公告)号：US4931489A

公开(公告)日：1990-06-05

申请号：US389649

申请日：1989-08-04

申请人： Clare H. Kucera ,  Stefano C. Crema ,  Michael D. Roznowski ,  Gerd Konrad ,  Heinrich Hartmann

发明人： Clare H. Kucera ,  Stefano C. Crema ,  Michael D. Roznowski ,  Gerd Konrad ,  Heinrich Hartmann

IPC分类号： C04B24/26 ,  C04B28/02 ,  C09K8/46

CPC分类号： C04B28/02 ,  C04B24/2652 ,  C09K8/487

摘要： A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a copolymer of acrylamide/vinyl imidazole and derivatives thereof in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000. The composition can also optionally include a dispersant such as sodium or potassium salts or a sulfonated naphthalene formaldehyde condensate.

摘要翻译： 用于固井油，气和水井的固井组合物，其包含水，水硬性水泥和有效量的水溶性流体损失添加剂，其由丙烯酰胺/乙烯基咪唑及其衍生物的共聚物组成，其重量比为约95： 5至5:95，所述共聚物的分子量范围为约100,000至3,000,000。 组合物还可任选地包括分散剂如钠盐或钾盐或磺化萘甲醛缩合物。