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Communications protocol for digital telemetry system

  • US 5,331,318 A
  • Filed: 02/26/1993
  • Issued: 07/19/1994
  • Est. Priority Date: 09/05/1991
  • Status: Expired due to Term
First Claim
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1. A method for controlling access of a plurality of information packets to and from a connecting digital telemetry cartridge, each packet containing data from at least one well-logging tool along a tool bus, comprising the following steps:

  • providing a transmission window of preprogrammed timed length and a selected starting delay to each information packet of the downhole well-logging tool string;

    receiving a frame start command from the digital telemetry cartridge;

    activating said starting delay for said provided window;

    transmitting continuously the data from connecting tools along the tool bus until said starting delay is completed;

    transmitting data continuously from a particular information packet until the end of said time window, thereby repeatingly transmitting information packet data from well-logging tools to the digital telemetry cartridge; and

    switching all of the information packets to the receive mode, whereby information transmitted by the digital telemetry cartridge can be received by the well-logging tools along the tool bus.

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