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

  • US 5,812,068 A
  • Filed: 12/12/1995
  • Issued: 09/22/1998
  • Est. Priority Date: 12/12/1994
  • Status: Expired due to Term
First Claim
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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.

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