| 摘要 |
<p>The present invention provides a method of monitoring a well to detect and provide warning of pipe sticking. The method includes 1) monitoring the downhole annular fluid pressure of a drilling fluid being pumped through the drill string during drilling over predetermined intervals of time to obtain a series of pressure measurements, 2) monitoring the torque required to rotate the drill string during said periods to obtain a series of torque measurements, and 3) comparing the series of downhole annular fluid pressure measurements with the series of torque measurements so as to identify corresponding changes in both, and 4) raising an alarm when the magnitude of the changes passes predetermined alarm values.</p> |
