| 发明名称 |
Scale inhibitor |
| 摘要 |
This invention relates to a process for inhibiting scaling in a subterranean oil or gas producing formation, comprising adding to the formation a composition comprising a metal chelant, a scale inhibitor and divalent metal cations, wherein the stability constant of the metal chelant-metal cation chelate at ambient temperature is equal to or higher than the stability constant of the chelate formed from the metal cations and the scale inhibitor, and wherein the solubility of the chelate formed from the metal cations and the scale inhibitor decreases with increasing temperature. |
| 申请公布号 |
US8822390(B2) |
申请公布日期 |
2014.09.02 |
| 申请号 |
US201113638440 |
申请日期 |
2011.03.24 |
| 申请人 |
Clariant Finance (BVI) Limited |
发明人 |
Heath Steve;Todd Malcolm |
| 分类号 |
C09K8/52;E21B37/06 |
主分类号 |
C09K8/52 |
| 代理机构 |
|
代理人 |
Waldrop Tod A. |
| 主权项 |
1. A process for inhibiting scaling in a subterranean oil or gas producing formation, comprising adding to the formation a composition comprising a metal chelant, a scale inhibitor and 1 to 10 wt.-% of divalent metal cations, wherein the stability constant of the metal chelant-metal cation chelate at ambient temperature is equal to or higher than the stability constant of the chelate formed from the metal cations and the scale inhibitor, and wherein the solubility of the chelate formed from the metal cations and the scale inhibitor decreases with increasing temperature, wherein the pH of the composition is adjusted to 4-14. |
| 地址 |
Tortola VG |
