| 发明名称 |
Subsurface safety valve and method for chemical injection into a wellbore |
| 摘要 |
A subsurface safety valve is modified to permit the passage of a downhole treatment chemical through the valve while bypassing a valve closure member which is maintained within the safety valve in operative condition. |
| 申请公布号 |
US8056637(B2) |
申请公布日期 |
2011.11.15 |
| 申请号 |
US20080263267 |
申请日期 |
2008.10.31 |
| 申请人 |
LARNACH ALAN;CHEVRON U.S.A. INC. |
发明人 |
LARNACH ALAN |
| 分类号 |
E21B34/10 |
主分类号 |
E21B34/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
