Measuring and testing – Borehole or drilling – Pressure measurement
Reexamination Certificate
2006-01-17
2006-01-17
Williams, Hezron (Department: 2856)
Measuring and testing
Borehole or drilling
Pressure measurement
C073S152430
Reexamination Certificate
active
06986282
ABSTRACT:
A method and apparatus is provided to collect downhole data during a drilling operation via a downhole tool. A differential pressure is created by the difference between internal pressure of fluid passing through the downhole tool and the annular pressure in the wellbore. The apparatus includes a drill collar connectable to the downhole drilling, and has an opening extending into a chamber therein. A piston is positioned in the chamber and has a rod extending into the opening. The piston is movable between a closed position with the rod filling the opening, and an open position with the rod retracted into the chamber to form a cavity for receiving downhole fluid. A sensor is positioned in the rod for collecting data from fluid in the cavity. The apparatus may also be provided with a probe and/or hydraulic circuitry to facilitate the collection of data.
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Ciglenec Reinhart
Hoefel Albert
Echols Brigitte L.
Fitzgerald John
Salazar J. L. Jennie
Schlumberger Technology Corporation
Segura Victor H.
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