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High temperature wellbore monitoring method and apparatus

  • US 7,862,228 B2
  • Filed: 07/27/2006
  • Issued: 01/04/2011
  • Est. Priority Date: 07/28/2005
  • Status: Expired due to Fees
First Claim
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1. An apparatus comprising a downhole element and a master element connected together via a sealed connection;

  • wherein the downhole element consists of a temperature sensor and a pressure sensor without any electronics and is embedded in a sealed housing resistant to high temperature;

    wherein the master element comprises electronics that control the temperature sensor and the pressure sensor;

    wherein the sealed connection is resistant to high temperature;

    wherein the sealed connection is a cable; and

    wherein the master element comprises further a controlled current source supplying a current to the downhole element via the sealed connection and said current being alternatively switched in polarity.

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