Abstract: A motor unit (21) of a machine (1) mobile manually on a track is equipped with hand grips (27) and connected by means of a detachable coupling (20) to a work unit (12). The motor unit (21) is composed of a motor (22), a hydraulic pump (23), a hydraulic tank (24), a cooler (25), and an electric generator (26). Arranged between the motor- and work unit (21, 12) are line couplings (28) for detachable connection of hydraulic lines (29), provided for actuation of working tools (15), and of a motor control line (30).

Abstract: An attachment is described that is configured for attachment to an arm of a piece of heavy construction equipment. The attachment is configured to rotate a section of pipe during break out (i.e. disconnection or disassembly) from another section of pipe and/or make up (i.e. connection or assembly) with another section of pipe. The attachment is configured to break the joint or torque the joint to a predetermined torque value, unthread or thread pipe, and lift the pipe under the power of the heavy construction equipment.

Abstract: In one embodiment, an adapter frame is provided for use with a power frame to support a tong assembly. When the adapter frame is coupled to the power frame, the load capacity of the power frame is increased, thereby allowing the power frame to be used with larger tongs or tong assemblies such as a riser tong.

Abstract: In spinner tongs, a so-called spinner (30), incorporated in an iron roughneck and thus serving to rotate a drill pipe during connection thereof to a drill string or during division of the drill string into individual pipes, the aim has been to reduce damage on the threaded connections (the pin-and-box joints) in the screwing/unscrewing operations. This is realised in an operation for the simultaneous centering and rotating of the drill pipe. Four spinner rollers (42) known in themselves, which are brought to bear on the drill pipe when surrounding it, are mounted according to the invention, preferably in pairs, at the outer ends of driven clamping arms (46), by bogies (50). At their opposite outer ends the clamping arms (46) are pivotally supported on a fixed frame part/structure (56) and are jointed to each other by means of a piston and cylinder (48) driven by pressure fluid and arranged to carry the clamping arms (46) towards and away from each other.

Abstract: The invention relates to a wrench for use with drilling apparatus used for drilling holes in the ground with a drill bit comprising a drilling segment, extension segments and a distance piece which connects the drill bit to the apparatus. The drill bit segments are connected via complementary threads in a spigot and socket fashion and the wrench serves to loosen adjacent segments with respect to one another in order to accommodate the insertion or removal of extension segments. The wrench (10) comprises a gripping arm (12), defining a mouth formation locatable around a drill bit segment (26), and a lever (18) pivotally connected to the arm. The lever defines a wedge face (34) which, through initial displacement of the lever can urge the drill bit segment (26) into gripping engagement with opposing gripping formations (30) located on the gripping arm and through continued displacement can loosen the drill bit segment with respect to an adjacent segment.

Abstract: A maneuverable powerjaw apparatus for making and breaking joints of well bore tubular is provided for operation on a rig floor. Preferably a plurality of wheels are mounted to a mobile housing in a reverse tricycle orientation that permits high maneuverability of the mobile housing including rotation in position. Preferably, the two forward wheels are individually powered by hydraulic motors. Vertical orientation of the mobile housing is preferably provided by hydraulic struts that, once the mobile housing is positioned adjacent the pipes on the rig floor, permit the power jaws to be positioned at the correct vertical position on the joints for making, breaking, and spinning of the pipes. In one presently preferred embodiment, a pivotal connection is provided between the mobile housing and a frame to which torque arms are attached. In this embodiment, the frame rotates with respect to the well bore tubular as the joints are made or broken while the mobile housing may remain stationary.

Abstract: A maneuverable power jaw apparatus for making and breaking joints of well bore tubulars is provided for operation on a rig floor. Preferably a plurality of wheels are mounted to a mobile housing in a reverse tricycle orientation that permits high maneuverability of the mobile housing including rotation in position. Preferably, the two forward wheels are individually powered by hydraulic motors. Vertical orientation of the mobile housing is preferably provided by hydraulic struts that, once the mobile housing is positioned adjacent the pipes on the rig floor, permit the power jaws to be positioned at the correct vertical position on the joints for making, breaking, and spinning of the pipes. In one presently preferred embodiment, a pivotal connection is provided between the mobile housing and a frame to which torque arms are attached. In this embodiment, the frame rotates with respect to the well bore tubulars as the joints are made or broken while the mobile housing may remain stationary.