초록 ▼

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

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.

대표청구항 ▼

[ What is claimed is:] [1.] A measurement-while-drilling downhole apparatus for use in drilling a borehole in a formation, comprising:(a) a plurality of sensors within the downhole assembly for providing a plurality of downhole measurements, said plurality of sensors including a device for providing

[ What is claimed is:] [1.] A measurement-while-drilling downhole apparatus for use in drilling a borehole in a formation, comprising:(a) a plurality of sensors within the downhole assembly for providing a plurality of downhole measurements, said plurality of sensors including a device for providing measurements of the resistivity of the formation; and(b) a computer within the downhole assembly for transforming the plurality of downhole measurements into one or more parameters of interest during drilling of the borehole in accordance with programmed instructions provided to the computer, one said parameter of interest being water saturation of the formation.