| 发明名称 |
Uses of an aqueous dispersion of colloidal barite particles |
| 摘要 |
<p>There is disclosed a method of making an additive for increasing the density of a wellbore fluid, the method comprising: comminuting a solid material and a dispersant in an aqueous medium, so as to produce solid colloidal particles coated with the dispersant.</p> |
| 申请公布号 |
EP1600486(A2) |
申请公布日期 |
2005.11.30 |
| 申请号 |
EP20050012788 |
申请日期 |
1997.07.16 |
| 申请人 |
SOFITECH N.V.;COMPAGNIE DES SERVICES DOWELL SCHLUMBERGER |
发明人 |
SAWDON, CHRISTOPHER ALAN;BRADBURY, ANDREW JAMES |
| 分类号 |
C09K8/00;C09K3/00;C09K8/03;C09K8/16;C09K8/32;C09K8/60;(IPC1-7):C09K7/00;C09K7/06;C09K7/02 |
主分类号 |
C09K8/00 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
