Texaco Inc.

Gerald F Rome

Frank L Lankford, Jr

A safety system for use with apparatus having a conductive member and where the apparatus changes the attitude and/or altitude of the conductive member during its operation includes at least one sensor which senses an electric field and provides a signal representative of the strength of the electric field. A safety device responsive to the signal from the sensor prevents the further changing of the conductive member's attitude and/or altitude when the electric field strength is greater than a predetermined safe value.

Safety system and method

A safety system for an oil well type derrick that has a crown block and a traveling block and drawworks for raising and lowering the traveling block. It uses electrical sensing means to detect the presence of the traveling block, and it has electronic circuits to control an actuator for braking the drawworks in order to prevent the traveling block from contacting the crown block.

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Houston, TX, United States of America

Gerald F Rome