A mast assembly for a drilling rig includes a mast formed from a plurality of mast subunits. The mast assembly includes a lower drilling machine, upper drilling machine, and upper mud assembly, each of which is coupled to and movable vertically relative to the mast. The mast subunits are separable when the mast is in a transport configuration such that the LDM is positioned in a first subunit and the UDM is in a second subunit of the mast when the mast is in the transport configuration. The mast assembly may be used during a continuous drilling operation.

A mast assembly for a drilling rig includes a mast formed from a plurality of mast subunits. The mast assembly includes a lower drilling machine, upper drilling machine, and upper mud assembly, each of which is coupled to and movable vertically relative to the mast. The mast subunits are separable when the mast is in a transport configuration such that the LDM is positioned in a first subunit and the UDM is in a second subunit of the mast when the mast is in the transport configuration. The mast assembly may be used during a continuous drilling operation.

A wellbore surface assembly includes a slip assembly, vertical rails, linear actuators, and an iron roughneck. The slip assembly is attached to a floor surface of a wellbore and it includes movable slips that engage a first tube. The vertical rails are attached to the base of the automatic slip assembly. The iron roughneck is movable along the vertical rails. The automatic iron roughneck includes a frame, a rotary ring, die actuators, and dies. The iron roughneck is movable by the linear actuators along a length of the vertical rails, changing an elevation of the iron roughneck with respect to the automatic slip assembly and the floor surface of the wellbore. The dies engage the second tube and the rotary ring rotates the second tube, threadedly attaching or detaching the second tube from the first tube.

A wellbore surface assembly includes a slip assembly, vertical rails, linear actuators, and an iron roughneck. The slip assembly is attached to a floor surface of a wellbore and it includes movable slips that engage a first tube. The vertical rails are attached to the base of the automatic slip assembly. The iron roughneck is movable along the vertical rails. The automatic iron roughneck includes a frame, a rotary ring, die actuators, and dies. The iron roughneck is movable by the linear actuators along a length of the vertical rails, changing an elevation of the iron roughneck with respect to the automatic slip assembly and the floor surface of the wellbore. The dies engage the second tube and the rotary ring rotates the second tube, threadedly attaching or detaching the second tube from the first tube.

An elevator grip or rotary slip grip system, comprising a cage spacer adaptably mountable to an upper surface of an elevator or slip body, a dog cage having a plurality of openings, a plurality of locking dogs adaptably mountable to a plurality of seats in the elevator or slip body, wherein each of the plurality of locking dogs has a front surface to engage an object and wherein the front surface of each of the plurality of locking dogs is disposed through each of the plurality of openings in the dog cage is disclosed. A method of using the elevator grip or rotary slip grip system is also disclosed.

An elevator grip or rotary slip grip system, comprising a cage spacer adaptably mountable to an upper surface of an elevator or slip body, a dog cage having a plurality of openings, a plurality of locking dogs adaptably mountable to a plurality of seats in the elevator or slip body, wherein each of the plurality of locking dogs has a front surface to engage an object and wherein the front surface of each of the plurality of locking dogs is disposed through each of the plurality of openings in the dog cage is disclosed. A method of using the elevator grip or rotary slip grip system is also disclosed.

A system including an elevator to move a tubular, the elevator including two or more remotely operable latches that can configure the elevator to handle various tubular diameters. A portion of the latches can be laterally offset from each other and another portion can overlap adjacent latches. The elevator can be Atmosphere Explosible (ATEX) certified or International Electrotechnical Commission for Explosive Atmospheres (IECEx) certified according to explosive (EX) Zone 1 requirements with an electronics enclosure contained within a sealed chamber. The elevator can be rotated greater than 90 degrees relative to a pair of links that support the elevator. The elevator can use rotary actuators to operate the latches and rotate the housing of the elevator.

An apparatus and method for an integrated flush-mount spider and power-tong apparatus comprising a flush-mount spider integrated with an attached power-tong and electronic load cell torque monitor. The power-tong applies rotation in opposite directions to make-up and breakout the pipe string. The flush mount spider holds the lower pipe string in place and serves as a backup tong to prevent rotation of the lower pipe string. The addition of a pipe spinner allows the integrated flush-mount spider and power-tong apparatus to replace a top drive for advancing a wellbore.

A self-setting casing protector secured to a slip type casing elevator for grabbing a casing tubular and running the casing tubular into and out of a wellbore having two C-shaped setting plates each with a plurality of fastening holes; a plurality of support tubes positioned between aligned fastening holes; a plurality of bolts each penetrating pairs of fastening holes and a support tube, the second C-shaped setting plate simultaneously engaging (i) two aligned slip setting segments, and (ii) two aligned die retainers. As the slip type casing elevator is hoisted, the casing tubular drops while attached to the first C-shaped setting plate setting the casing tubular in the slip type casing elevator while simultaneously (i) protecting each casing tubular as it is sequentially lowered into or pulled from the wellbore, and (ii) protecting an upsetting box with premium connections as the tubular is run into and out of a wellbore.

A self-setting casing protector secured to a slip type casing elevator for grabbing a casing tubular and running the casing tubular into and out of a wellbore having two C-shaped setting plates each with a plurality of fastening holes; a plurality of support tubes positioned between aligned fastening holes; a plurality of bolts each penetrating pairs of fastening holes and a support tube, the second C-shaped setting plate simultaneously engaging (i) two aligned slip setting segments, and (ii) two aligned die retainers. As the slip type casing elevator is hoisted, the casing tubular drops while attached to the first C-shaped setting plate setting the casing tubular in the slip type casing elevator while simultaneously (i) protecting each casing tubular as it is sequentially lowered into or pulled from the wellbore, and (ii) protecting an upsetting box with premium connections as the tubular is run into and out of a wellbore.