A land-based drilling rig includes a first substructure and a second substructure, the second substructure being positioned generally parallel to the first substructure. The land-based drilling rig also includes a drill rig floor coupled to the first and second substructures, the drill rig floor including a V-door. The side of the drill rig floor has the V-door defining a V-door side of the drill rig floor, where the V-door side of the drill rig floor is parallel to the first substructure. The first and second substructures pivotably support the drill rig floor. The land-based drilling rig also includes a mast, the mast mechanically coupled to one or more of the first substructure, the second substructure, and the drill rig floor. The mast is pivotably coupled to one or more of the first substructure, the second substructure, and the drill rig floor by a mast pivot point. The mast includes a V-door side, the V-door side of the mast parallel to the first or second substructure. In addition, the land-based drilling rig includes a mast hydraulic lift cylinder coupled to the mast at a mast lift point and a choke manifold, the choke manifold positioned on the drill rig floor.

A method that includes providing an assembled drilling rig on a first supportive surface at a first drill site, the assembled drilling rig having a walking system associated therewith, the walking system being configured to translate and rotate relative to the assembled drilling rig to displace the assembled drilling rig; actuating the walking system to lift the assembled drilling rig to a clearance height, relative to the first supportive surface; positioning a trailer under the assembled drilling rig; wherein the trailer includes a platform located above a plurality of wheels; supporting the assembled drilling rig on the trailer platform; and relocating the assembled drilling rig from the first drill site to a second drill site by rolling the wheels across the ground.

An improved system and method for bracing, transporting, assembling, and disassembly of drilling equipment at oil and gas land-based well sites. The system has a substructure with side boxes support bracing that are in a scissor jack (or grand plié) style bracing with telescoping tension link(s), linking pins, and vertical hydraulic cylinders. These linking pins are set after raising the substructure and secure the telescoping tension link, support arms, and support bracing in place to maintain the integrity of the substructure. Alternatively the system has a substructure with side boxes support bracing that are in a scissor jack (or grand plié) style bracing with screw jacks and a means of stabilization during substructure raising. The substructure bracing reduces the overall length, reduces the upper and lower box spans, and balances the raising loads, subsequently lowering the transport weight of the side box such that a commercial walking system may be integrated into the side box and remain there during transport while maximizing the operating drill floor height while minimizing the transport height.

A guide arm with dual guiding functionality is disclosed. The guide arm comprises two parallelogram mechanisms with a slew drive in between. The first parallelogram mechanism may move the guide arm between different travel positions. The slew drive may rotate the second parallelogram mechanism between different clock positions. The second parallelogram mechanism may extend and retract the guide arm. The guide arm may be mounted to a belly board or to a derrick wall rather than on a drill floor. A first guiding functionality may include guiding the lower end of a pipe stand in transfer between a drilling rig well center and a storage position. A second guiding functionality may include guiding the pin end of a single tubular between a drilling operation and a catwalk.

A well intervention semisubmersible vessel and method including a drilling rig further including a non-elevated derrick floor and a handling tower having a single point land out without riser tensioners. The vessel may also include a flush drill floor, a flush moonpool door, a lift frame and personnel access walkway wherein the lift frame is capable of being skidded into position by a skidding system capable of providing personnel access and wherein the skidding system comprises a plurality of skidding rails, at least one remotely operated vehicle, an intervention rising system and storage area, a crane, a moonpool and handling area, a moonpool trolley, at least one fluid pump, and/or at least one tank.

A boom system for utility service lines (such as cables, wires, hoses, pipes, etc.) for a drilling rig. The mobile boom system includes a skid with posts and one or more booms pivotally attached to each post. One or more articulating booms attached to a first post can support and carry the service lines connected to the sources and one or more articulating booms attached to the second post can support and carry the service lines connected to a drilling rig, or to a boom extending from a drilling rig. The mobile articulating boom system can include means for moving and selectively positioning the mobile articulating boom system at a drilling site. The mobile boom system can be adapted so that it has first, second, and third booms which can be placed in a closed position and fit within a perimeter defined by the skid for easier transportation to and from a drilling site.

A drilling rig mobility system moves a drilling rig or similar structure in an oilfield or similar environment and includes independently controllable positioning shoes attaching to the drilling rig and controllable through separate and coordinated position control commands. Each positioning shoe may be individually addressed to reposition the drilling rig. Each positioning shoe includes a hydraulic actuator and wireless control circuitry. The hydraulic actuator provides vertical and horizontal force in response to wireless control signals for wireless position and control data and instructions with a remote wireless communications device. A cylinder stomper vertically elevates the hydraulic actuator and receives and transfers the vertical force. A foot assembly transfers the horizontal force from the hydraulic actuator. A positioning shoe cylinder stomper and positioning shoe traverse cylinder provide infinitely variable position control. Rotational positioning may be manually or automatically achieved.

A low-profile roller assembly reduces an overall mounting height of walking machines enabling use in a wider variety of structures and locations while also reducing complexity and over cost. The low-profile roller assembly may include a roller device with a substantially flat roller cage with one or more slots configured to hold a single layer of rollers. The roller device may move longitudinally relative to a support foot and a load plate may move longitudinally relative to both the support foot and the roller device. The load plate may laterally displace relative to a longitudinal axis of the support foot or may laterally displace relative to longitudinal axes of both the support foot and the roller device.

A system for moving items on a rig floor (2), the system comprising a plurality of skids (30-35) and a network of rails (10) for guiding the plurality of skids, each skid of said plurality of skids for supporting an item, and each skid having rail engagement members for engaging at least one rail of said network of rails. The rig floor may form part of a drilling rig such as a drill ship (1) used in the construction of oil and gas wells.

Two or more rotating towers on a drilling rig may be configured to rotate between one or more wells. The rotating towers may have a common well center, such that the two or more towers can operate over the same well to provide redundant or cooperative operations. Some example cooperative operations include heavy lifting and/or isochronous tripping operations. Redundancy can be provided by the two or more rotating towers to prevent equipment failures from halting operations.