TerraSWIVEL 
A purely mechanical swivel with bearings suitable for moderate tensile and compressive loads that enables partial or selective rotation of the workstring.
The tool is available with standard rotary connections and can be provided with bi-directional or uni-directional rotational capability.
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Features
Ideal for ERD well bore clean-up applications or well service type applications
Deploying Memory Logging Tools in to enable rotation of the work string while protecting logging tools from rotational vibration
Deploying TCP guns providing finite depth control and drag reduction
Deploying and setting bridge plugs or isolation packers
Opening/closing sliding sleeves in horizontal and ERD wells