In combination a drilling mast and a top drive system for a drilling rig having a drill floor with a well center. The drilling mast has a U-shaped horizontal cross section with a left-hand mast wall, a rear mast wall, and a right-hand mast wall, and with an open front side. Each of the mast walls is provided with one or more vertical rails that are, in use of the drilling rig, parallel to a vertical firing line that extends through the well center. The top drive system comprises a traveling carriage and a top drive unit supported by said carriage. A left-hand fingerboard device is mounted to the left-hand mast wall and a right-hand side fingerboard device is mounted to the right-hand mast wall.

In combination a drilling mast and a top drive system for a drilling rig having a drill floor with a well center. The drilling mast has a U-shaped horizontal cross section with a left-hand mast wall, a rear mast wall, and a right-hand mast wall, and with an open front side. Each of the mast walls is provided with one or more vertical rails that are, in use of the drilling rig, parallel to a vertical firing line that extends through the well center. The top drive system comprises a traveling carriage and a top drive unit supported by said carriage. A left-hand fingerboard device is mounted to the left-hand mast wall and a right-hand side fingerboard device is mounted to the right-hand mast wall.

The present application provides a method, a device, and a system of vibration reduction control on the installation of a deepwater drilling riser. The method includes: determining a lateral vibration displacement of each position of the riser at different times in an installation process according to a mechanical model of the deepwater drilling riser in the installation process, determining a stress generated by a lateral vibration of the riser in the installation process, determining a vibration reduction control speed applied to a bottom of the riser in the installation process according to the stress and the lateral vibration displacement of each position of the riser at different times in the installation process, and performing a vibration reduction control on the bottom of the riser based on the vibration reduction control speed.

The present disclosure generally relates to a combined multicoupler for connecting a tool to a top drive. The combined multicoupler includes a load frame comprising a frame body having a load shoulder, and a side door coupled to the frame body. The side door opens from the frame body to allow a tool sliding horizontally into the load shoulder, and the side door closes to lock the tool in the load frame. The combined multicoupler further comprises a drive stem movably coupled to the load frame, wherein the drive stem moves vertically to connect and disconnect with the tool in the load frame.

The present disclosure generally relates to a combined multicoupler for connecting a tool to a top drive. The combined multicoupler includes a load frame comprising a frame body having a load shoulder, and a side door coupled to the frame body. The side door opens from the frame body to allow a tool sliding horizontally into the load shoulder, and the side door closes to lock the tool in the load frame. The combined multicoupler further comprises a drive stem movably coupled to the load frame, wherein the drive stem moves vertically to connect and disconnect with the tool in the load frame.

A riser system with a primary conduit extends between a surface vessel and a subsea location and an auxiliary conduit that extends adjacent the primary conduit. In one example a composite jumper conduit extends from the surface vessel and is fluidly connected to the auxiliary conduit. The jumper conduit includes a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix. In one example a subsea composite jumper conduit extends from subsea infrastructure and is fluidly connected to the auxiliary conduit. The subsea jumper conduit includes a composite material formed of at least a matrix and one or more reinforcing elements embedded within the matrix.

A vessel adapted to perform subsea wellbore related operations involving a riser string that is assembled from releasably interconnected riser sections and extends between a subsea wellbore and the vessel. The riser string vertical handling system of the vessel includes a controlled motion device that is adapted to displace the riser string lifting tool in at least one horizontal direction relative to the riser spider device at least whilst travelling between the elevated and lowered position thereof loaded by the riser string suspended from the riser string lifting tool, thereby allowing to establish an inclined travel path with selectively variable inclination of the riser string lifting tool relative to an imaginary vertical line through the riser string passage of the riser spider device, e.g. said inclined travel path having an inclination selected to correspond to an actual water current induced inclination of an upper portion of the riser string during the riser string assembly process.

The present invention concerns a connection system 1 for a marine drilling riser 10 having one or more auxiliary lines 20, the connection system comprising: a moveable coupling member 30 having at least one first connector and at least one second connector coupled to the at least one first connector, wherein the at least one second connector is adapted for engaging with at least one connector of an auxiliary line of the marine drilling riser The connection system further comprising a control line support 18 for fixing at or adjacent an outer surface of the marine drilling riser; a control line supported by the control line support and for attachment to the moveable coupling member; and a tailing line for attachment to the moveable coupling member.

A plan structure and a method for creating a plan for forming/operating a sub-sea or sub-terranean well, in an automated planner, are disclosed. The plan defines logical, sequential and conditional interrelationships between events in the plan, so that a controller can carry out the plan in a flexible and time-independent manner to complete the sequenced events. The definition of the logical, sequential and conditional interdependencies permits flexibility in how the controller uses the time and resources available to it so that the plan directs the controller in a non-prescriptive manner, allowing greater flexibility in plan execution and reducing the necessity for re-planning to occur when changes in the world or environment in which the controller executes the plan are detected.

A shaft enlargement arrangement for a boring system is provided, the shaft enlargement arrangement comprising a hollow column proximate a lower end of the boring system; a first cutter head that is rotatably fitted to the hollow column, with first drive means being provided to rotate the first cutter head relative to the hollow column so as to bore downwardly a hole having a diameter corresponding substantially to the diameter of the first cutter head; and a boring head arrangement fitted to an operatively lower end of the column, the boring head arrangement terminating in a second cutter head to bore a leading hole as the boring system proceeds to bore downwardly. In an embodiment, the first cutter head comprises a support body carrying a winged arrangement, the support body being rotatably fitted to the column, the winged arrangement comprising a plurality of wings extending from the support body, each wing being fitted with, or comprising, a plurality of first cutter elements.