| 摘要 |
<p>A sensor for installation in an underground well having a casing or tubing installedtherein, the sensor comprising: a sensor body that can be installed in a hole formedin the casing or tubing so as to extend between the inside and outside of the casingor tubing; sensor elements located within the body and capable of sensing propertiesof an underground formation surrounding the well; and communication elementslocated within the body and capable of communicating information between thesensor elements and a communication device in the well; wherein the sensor bodyalso includes a portion that can be sealed to the casing or tubing to prevent fluidcommunication between the inside and the outside of the casing or tubing throughthe hole when the sensor body is installed therein. The invention also providessystems incorporating such sensors, methods for installing sensors and applicationsof such systems. The sensors can include pressure, temperature, resistivity,conductivity, stress, strain, p H and chemical composition sensors.</p> |
