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Secure activation of a downhole device

  • US 7,347,278 B2
  • Filed: 08/27/2004
  • Issued: 03/25/2008
  • Est. Priority Date: 10/27/1998
  • Status: Expired due to Term
First Claim
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1. A system comprising:

  • a well tool for deployment in a well;

    a controller;

    a link coupled between the controller and the well tool, wherein the well tool comprises plural control units, each of the plural control units having a microprocessor and an initiator coupled to the microprocessor,each microprocessor adapted to communicate bi-directionally with the controller,wherein the controller is adapted to send a plurality of activation commands to respective microprocessors to activate the respective control units,each activation command containing a unique identifier corresponding to a respective control unit, andwherein each control unit includes a circuit board, the corresponding microprocessor and initiator being mounted on one planar surface of the circuit board.

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