Patent ID: 11891864
Assignee: NATIONAL OILWELL VARCO, L.P.
Field: Handling (Mechanical engineering)
Classification: CPC E  B | IPC B  E

Claim 6:
7. A drilling rig comprising:
a drill floor configured for arrangement above a well and having an opening for accessing the well;
a mast extending from the drill floor;
a racking board arranged along the mast and adapted for receiving and for bracing top portions of drilling pipe; and
a lift arm for lifting and carrying the drilling pipe, the lift arm comprising:
a boom secured to the mast at a pivotable coupling, arranged at a first end of the boom, and at a location above the racking board, the boom extending laterally, relative to the mast, from the first end to a second end;
a pipe engaging element coupled to the boom at the second end and configured to engage with a box end of the drilling pipe; and
a lift line configured to raise and lower the pipe engaging element along the mast to lift and carry the drilling pipe;
wherein the pivotable coupling is configured to allow the boom to pivot about a vertical axis generally parallel to the mast,
wherein, the boom is configured to pivotally swing the second end about the pivotable coupling while carrying the drilling pipe between a position at well center and a position in a setback area.