Method for determining drilling malfunction by correlation...

Details Method for determining drilling malfunction by correlation... Method for determining drilling malfunction by correlation...

2008-01-08

2008-01-08

Bates, Zakiya W. (Department: 3676)

Boring or penetrating the earth

With bit wear signal generating

C175S048000, C702S009000

Reexamination Certificate

active

07316278

ABSTRACT:
A method for determining a drilling malfunction includes determining a correspondence between at least one drilling operating parameter and at least one drilling response parameter. Determining the correspondence is performed when a parameter related to a dissipative motion of the drill string falls below a selected threshold. A value of the drilling response parameter is predicted based on the correspondence and measurements of the drilling operating parameter. Existence of the malfunction is determined when the predicted value is substantially different from a measured value of the drilling response parameter.

REFERENCES:
patent: 5474142 (1995-12-01), Bowden

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