| 发明名称 |
HYDROSTATIC PRESSURE INDEPENDENT ACTUATORS AND METHODS |
| 摘要 |
<p>An actuator that may be used in a wellbore to change the state of a downhole tool. The actuator has an operator that is axially moveable in response to changes in tubing pressure. The actuator includes a hydraulic circuit that creates a temporary reference pressure against which the tubing pressure indexes the operator.</p> |
| 申请公布号 |
WO2013074392(A1) |
申请公布日期 |
2013.05.23 |
| 申请号 |
WO2012US64287 |
申请日期 |
2012.11.09 |
| 申请人 |
SCHLUMBERGER CANADA LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SCHLUMBERGER TECHNOLOGY CORPORATION |
发明人 |
CAMINARI, RICHARD, T. |
| 分类号 |
E21B21/08;E21B17/02 |
主分类号 |
E21B21/08 |
| 代理机构 |
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代理人 |
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