公开(公告)号：EP1144542A4

公开(公告)日：2004-06-09

申请号：EP99966603

申请日：1999-12-22

申请人： CONOCOPHILLIPS CO

发明人： EFNER HOWARD F ,  STEPHENS MICHAEL

IPC分类号： C04B24/26 ,  C08F220/56 ,  C09K7/02 ,  C08F222/38 ,  C08F226/02 ,  C08F226/06 ,  C08F226/10

CPC分类号： C04B24/2652 ,  C04B24/2641 ,  C04B24/2688 ,  C08F220/56

摘要： A composition comprising a polymer which comprises repeat units derived from a first unsaturated amide, a hydroxy acrylate, and at least two monomers selected from the group consisting of (1) a vinyl pyridine or derivative thereof and acrylic acid or salt thereof; (2) a vinyl morpholine and a second unsaturated amide; (3) acrylic acid or salt thereof and a second unsaturated amide; (4) acrylic acid or salt thereof, a vinyl pyridine, and a vinyl morpholine; and combination of two or more thereof wherein said first unsaturated amide is not the same as said second unsaturated amide.

公开(公告)号：EP1397577A4

公开(公告)日：2004-04-28

申请号：EP00960141

申请日：2000-07-12

申请人： CONOCOPHILLIPS CO

发明人： STEPHENS MICHAEL ,  PEREIRA BURTON

IPC分类号： C04B22/00 ,  C04B24/38 ,  C04B28/02 ,  C09K8/46 ,  C09K8/473 ,  E21B33/13

CPC分类号： C04B24/383 ,  C04B22/0053 ,  C04B28/02 ,  C09K8/46 ,  C09K8/473 ,  C04B38/00 ,  C04B2103/0051

摘要： Improved low density well cement slurry compositions are formed by the addition of a free-fluid inhibitor additive to a mixture comprising a hydraulic cement and water. Suitable free-fluid inhibitors are hydroxy ethyl cellulose polymers having a cps value in the range of from about 5000 to about 50,000.