Baker Hughes Corporation

Daniel C Minette

James V Leggett, Iii

Herbert W Beimgraben

Ronald Deady

Bernard G Hubner

Macmillan M Wisler

Wallace Harold Meyer

Wallace H Meyer, Jr

Macmillan H Wisler

The present invention provides a measurement-while-drilling (MWD) system having a downhole computer and multiple downhole sensors. Relatively large amounts of basic or &ldquo;raw&rdquo; data are measured by downhole sensors, and these data are processed within a downhole computer to be reduced to parameters of interest, which may be utilized to control the drilling operation by downhole devices, stored downhole, telemetered to the surface, or both. The measurements may be correlated downhole with stored reference data thereby providing additional information pertaining to the drilling operation. Downhole depth correlation between downhole measured parameters may be made by utilizing surface determined or downhole determined borehole depth.

Drilling system with downhole apparatus for determining parameters of interest and for adjusting drilling direction in response thereto

The present invention provides a measurement-while-drilling (MWD) system having a downhole computer and multiple downhole sensors. Relatively large amounts of basic or 'raw' data are measured by downhole sensors, and these data are processed within a downhole computer to be reduced to parameters of interest, which may be utilized to control the drilling operation by downhole devices, stored downhole, telemetered to the surface, or both. The measurements may be correlated downhole with stored reference data thereby providing additional information pertaining to the drilling operation. Downhole depth correlation between downhole measured parameters may be made by utilizing surface determined or downhole determined borehole depth.

Drilling system with downhole apparatus for determining parameters of

A method for analyzing data from a measurement-while-drilling (MWD) formation evaluation logging tool which compensates for rotation of the logging tool (along with the rest of the drillstring) during measurement periods. The density measurement is combined with the measurement from a borehole caliper, preferably an acoustic caliper. The acoustic caliper can continuously measure the standoff as the tool is rotating around the borehole. If the caliper is aligned with the density source and detectors, it can determine the standoff in front of the detectors at any given time. This information can be used to separate the density data into a number of bins based on the amount of standoff. After a pre-set time interval, the density measurement can then be made. The first step in this process is for short space and long space densities to be calculated from the data in each bin. Then, these density measurements can be combined in a manner that minimizes the total error in the density calculation.

Method for analyzing formation data from a formation evaluation

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The Woodlands, TX, United States of America

Daniel C Minette