Boring or penetrating the earth – Processes
Reexamination Certificate
2006-05-16
2006-05-16
Bagnell, David (Department: 3672)
Boring or penetrating the earth
Processes
C175S024000, C175S027000, C175S038000, C175S048000
Reexamination Certificate
active
07044239
ABSTRACT:
A drilling system includes a pressure sensor disposed on a drill string in the wellbore, the sensor responsive to pressure of a drilling fluid disposed in an annular space between a wall of the wellbore and the drill string, and a processor operatively coupled to the pressure sensor. The processor is adapted to operate a drill string release controller to release the drill string into the wellbore so as to maintain an equivalent density of the drilling fluid substantially at a selected value. A method for automatically drilling a wellbore includes measuring pressure of a drilling fluid in an annular space between a wall of the wellbore and a drill string in the wellbore, and automatically controlling a rate of release of the drill string in response to the measured pressure so as to maintain an equivalent density of the drilling fluid substantially at a selected value.
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King Charles H.
Niedermayr Michael
Pinckard Mitchell D.
Bagnell David
Bomar Shane
Noble Corporation
Osha & Liang LLP
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