Communications: electrical – Wellbore telemetering or control – Pulse or digital signal transmission
Patent
1995-12-12
1998-09-22
Eldred, J. Woodrow
Communications: electrical
Wellbore telemetering or control
Pulse or digital signal transmission
3408931, 3408556, 3408563, 7315202, 7315203, 7315205, 7315246, 175 40, 175 45, G01V 300
Patent
active
058120688
ABSTRACT:
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.
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Aron et al., Sonic Compression Measurements While Drilling, SWPLA 35.sup.th Annual Logging Symposium, Jun. 19-22, 1994, 17 pages.
Beimgraben Herbert W.
Deady Ronald
Hubner Bernard G.
Leggett, III James V.
Meyer Wallace H.
Baker Hughes Incorporated
Eldred J. Woodrow
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