Methods and systems for averting or mitigating undesirable...

Details Methods and systems for averting or mitigating undesirable... Methods and systems for averting or mitigating undesirable...

2005-03-22

2005-03-22

Neuder, William (Department: 3672)

Boring or penetrating the earth

Automatic control

Of fluid pressure below ground

C175S038000, C175S048000

Reexamination Certificate

active

06868920

ABSTRACT:
A method and system for averting or mitigating undesirable drilling events during a drilling process is disclosed. The state of the drilling rig is detected, preferably automatically, based on surface and/or downhole measurement data. One or more undesirable drilling events are detected by correlating the acquired measurement data with the detected state. A drilling rig action is determined which averts or mitigates a detected undesirable drilling event. Finally, the drilling process is overridden by commanding performance of the action.The algorithm used in detecting the most likely rig state is preferably probabilistic in nature, and is even more preferably based on particle filtering techniques.

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