Definition:
Swivel Joint
Subject Area 1:
Logging & petrophysics
Subject Area 2:
A tool name
Remarks:
The SJO enables rotational movement between the cable head and the toolstring below while maintaining a constant electrical connection through the tool, allowing the cable to untorque as it is run into the well. This is important particularly when running with a new logging cable or when deploying a toolstring that restricts rotation of the tool. This will in turn extend the life of a cable and reduce the tendency of a cable to birdcage.