Nts Amega West Usa, Inc.

Harris Hurst

Everett Philip Hagar

Robert McCullough

Adam Well

Sean O'Neill

Clutch assemblies and related systems are provided. In some embodiments, the system comprises the clutch assembly, a circulation assembly, and an actuation mechanism operatively connected to the clutch assembly and the circulation assembly. In some embodiments, the clutch assembly allows for selective rotation of a bottom hole assembly of a drill string and the circulation assembly allows for selective exhausting of drilling fluid from the drill string. Related drill strings and methods for drilling a borehole are also provided.

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The Woodlands, TX, United States of America

Harris Hurst