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Horizontal Spline Joint

The Eaton Horizontal Spline Joint is a special purpose tool designed to provide the operator a means of rotating the drill string without rotating the fishing tool or engaged fish in horizontal wellbores. It is primarily used while fishing in horizontal wellbore laterals. The Horizontal Spline Joint will transmit full torque in the closed position but freewheel in the open position, while allowing full circulation at all times. Its presence in the fishing string eliminates the occurrence of lost fish when rotation of the drill string is necessary to pull out of the horizontal section of the wellbore with an engaged fish.
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