| 摘要 |
A pressure release encoding system, as shown in Figure 13, for communicating downhole information through a wellbore to a surface location has a valve (7) for providing a fluid restriction to fluid passing in the wellbore, an inclination sensor (404) postioned in the wellbore for sensing a downhole condition in the welbore, an actuator (400) cooperative with the valve for moving the valve between at least two positions in timed relation to the downhole condition sensed by die sensor (18), and a detector postioned at the surface location for providing a measurement value at the surface location correlative to the time between the changes of the pressure of the fluid in the wellbore.
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