| 摘要 |
A pressure release encoding system (1 ) for communicating downhole information through a wellbore (2) to a surface location (20) include a downhole tool (8) with a valve (36) for providing a fluid restriction to fluid passing in the wellbore (2), a sensor (404) positioned in the wellbore for sensing a downhole condition in the wellbore, a brake (44) cooperative with the valve (36) for moving the valve between at least two positions in timed relation to the downhole condition sensed by the sensor, and a detector (18) positioned 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. The system (1 ) associates position of the valve with pressure transduction. The sensor (404) is an inclination sensor for sensing an angle of inclination of the wellbore. |
