| 摘要 |
A method is disclosed for identifying potential drilling hazards in a wellbore, including measuring a drilling parameter, correlating the paramete r to depth in the wellbore at which selected components of a drill string pass , determining changes in the parameter each time the selected components pass selected depths in the wellbore, and generating a warning signal in response to the determined changes in the parameter. Another disclosed method include s determining times at which a drilling system is conditioning the wellbore, measuring torque, hookload and drilling fluid pressure during conditioning, and generating a warning signal if one or more of maximum value of measured torque, torque variation, maximum value of drill string acceleration, maximu m value of hookload and maximum value of drilling fluid pressure exceeds a selected threshold during reaming up motion of the drilling system.
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