Nl Industries

Intertrust Technologies Corporation

William B Bradley

David P Maher

Gilles Boccon-Gibod

John E Fontenot

Philip W Holbrook

Julien G Boeuf

Michael G Menente

A system for controlling the direction of a drill bit in a borehole utilizes both a drill string model and a bit-rock directional interaction model to compare ideal predicted or expected moments with real time measured moments to arrive at correction data necessary to return the bit to its desired path. The magnitude and direction of moments generated near the bit are measured in a downhole equipment sub, containing a microprocessor and memory, so that the real time data can be collected and acted upon without undue delay thereby minimizing drilling time lost due to deviations from the desired path.

Method of controlling the direction of a drill bit in a borehole

The potential for failure of a formation is predicated by using standard logging apparatus and techniques to monitor the change in a formation characteristic over an extended time period. Changes in this characteristic are attributed to absorption of fluid by the formation which could lead to a possible breakdown of the structural integrity of the formation.

Method and system for monitoring the stability of boreholes

Growing community of inventors

Dallas, TX, United States of America

William B Bradley