| 发明名称 |
Well cement compositions |
| 摘要 |
<p>Lightweight well cement compositions, comprised of a hydraulic cement, water and an additive comprising a suspension of microspheres in water gelled with sodium bentonite, are used in the annulus between a pipe and the well bore for sealing the pipe in zones or formations which readily fracture at low hydrostatic pressure.</p> |
| 申请公布号 |
EP1316539(A2) |
申请公布日期 |
2003.06.04 |
| 申请号 |
EP20020258245 |
申请日期 |
2002.11.29 |
| 申请人 |
HALLIBURTON ENERGY SERVICES, INC. |
发明人 |
BROTHERS, LANCE E.;BRADEN, JAMES A.;KEENER, KRISTA L. |
| 分类号 |
C04B28/02;C09K8/42;C09K8/46;C09K8/473;E21B33/13;(IPC1-7):C04B38/08 |
主分类号 |
C04B28/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
