| 发明名称 |
FLUIDI ACQUOSI DI TRIVELLAZIONE E RIEMPIMENTO |
| 摘要 |
<p>Aqueous, clay-containing drilling fluids and packer fluids are modified for reduction of viscosity and gel strength upon addition of water soluble lignosulfonates and particular low molecular weight acrylic copolymers. Enhanced reduction of viscosity and gel strength may be obtained by also adding an ethoxylated phenol surfactant.</p> |
| 申请公布号 |
IT1157912(B) |
申请公布日期 |
1987.02.18 |
| 申请号 |
IT19820019065 |
申请日期 |
1982.01.12 |
| 申请人 |
NL INDUSTRIES INC. |
发明人 |
BLATTEL STEVEN RAY;HILSCHER LARRY WAYNE |
| 分类号 |
C09K8/04;C09K8/20;C09K8/24;E21B21/00;(IPC1-7):E21B/ |
主分类号 |
C09K8/04 |
| 代理机构 |
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代理人 |
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| 主权项 |
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| 地址 |
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