Abstract: A power transmission for a slewing interface includes a rotor rotatable relative to a stator about a slewing axis, at least one drive sprocket mounted on the stator adjacent the rotor, a first drive cooperating with the at least one drive sprocket, at least two satellite sprockets on the rotor and spaced around the rotor, at least one drive belt mounted around the drive sprockets and around the satellite sprockets in driving engagement collectively therewith, power is delivered continuously from the first drive to at least one of the satellite sprockets at all times during rotation of the rotor about the slewing axis.

Abstract: A distributed drive includes a frame, a main sprocket, and a plurality of drive assemblies mounted therearound for rotation of the main sprocket. The main sprocket has a circumferential drive rim around which the drive assemblies are mounted in driving engagement with the drive rim so as to selectively rotate the main sprocket relative to the frame. Each drive assembly includes at least two auxiliary sprockets lying substantially in the plane of the main sprocket. An endless belt is mounted around the auxiliary sprockets so that a span of the endless belt spans between a pair of the auxiliary sprockets in an arc-of-contact with the drive rim. At least one of the two auxiliary sprockets is a selectively driven drive sprocket for selective rotation of the main sprocket.

Abstract: A portable pipe handling apparatus and method includes providing a support structure a providing a support structure adapted to support a pipe stand along a pipe stand building axis associated therewith, and inclining the pipe stand building axis so that an upper end of the axis is adjacent a top drive in a drilling rig mast and so that the pipe stand translation trajectory which is substantially co-axial with the pipe stand building axis intersects a hand-off window between the top drive and the pipe stand building axis.

Abstract: An integrated casing drive system combines a top drive having a rotary drive portion, a pipe handler having a casing gripper wherein the pipe handler is rotationally mounted to the top drive, and a selectively actuable casing drive lock for locking the rotary drive portion to the pipe handler.

Abstract: A distributed drive includes a frame, a main sprocket, and a plurality of drive assemblies mounted therearound for rotation of the main sprocket. The main sprocket has a circumferential drive rim around which the drive assemblies are mounted in driving engagement with the drive rim so as to selectively rotate the main sprocket relative to the frame. Each drive assembly includes at least two auxiliary sprockets lying substantially in the plane of the main sprocket. An endless belt is mounted around the auxiliary sprockets so that a span of the endless belt spans between a pair of the auxiliary sprockets in an arc-of-contact with the drive rim. At least one of the two auxiliary sprockets is a selectively driven drive sprocket for selective rotation of the main sprocket.

Abstract: A power transmission for a slewing interface includes a rotor rotatable relative to a stator about a slewing axis, at least one drive sprocket mounted on the stator adjacent the rotor, a first drive cooperating with the at least one drive sprocket, at least two satellite sprockets on the rotor and spaced around the rotor, at least one drive belt mounted around the drive sprockets and around the satellite sprockets in driving engagement collectively therewith, power is delivered continuously from the first drive to at least one of the satellite sprockets at all times during rotation of the rotor about the slewing axis.