Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Earth science
Reexamination Certificate
2007-03-01
2010-12-07
Nghiem, Michael P (Department: 2863)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Earth science
C324S338000
Reexamination Certificate
active
07848887
ABSTRACT:
A system and method to determine directional measurements for a drilling tool that at times rotates and at other times does not rotate. The method includes making a first set of measurements when the apparatus is rotating, making a second set of measurements when the apparatus is not rotating, and combining the first and second sets of measurements to obtain the directional measurements. The system includes a transmitter-receiver pair wherein the transmitter has a magnetic dipole moment parallel to a longitudinal axis of the apparatus and the receiver has a magnetic dipole moment that is tilted relative to the longitudinal axis of the apparatus, an electronics module to excite the transmitter and detect a receiver signal to make a first and second set of measurements when the apparatus is rotating and not rotating, and a processor to combine the first and second sets of measurements to obtain the directional measurements.
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Li Qiming
Yang Jian
Fonseca Darla
Le Toan M
Nghiem Michael P
Rutherford Charlotte
Schlumberger Technology Corporation
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