A system for conducting subterranean operations is disclosed and can include a support structure, a first tubular handler coupled to the support structure, and a second tubular handler coupled to the support structure and distinct from the first tubular handler. The system can further include a tool system coupled to the support structure and adapted to perform an operation on a first tubular.

A tubular handling system for conducting subterranean operations is disclosed and can include a first tubular handling system and a second tubular handling system. The first tubular handling system can include a bridge disposed within a tubular storage area, an arm pivotally coupled to the bridge, and a gripper coupled to the arm and adapted to engage with a tubular in the tubular storage area. The second tubular handling system can include a support structure, a first tubular handler coupled to the support structure, and a second tubular handler coupled to the support structure and distinct from the first tubular handling system.

A system for deploying a coil of spoolable pipe from a vessel includes a first tower configured to move longitudinally and transversely along a first track coupled to the vessel, a second tower configured to move longitudinally along a second track coupled to the vessel, and a coil drum assembly coupled to the first tower. The first tower is configured to insert the coil drum assembly transversely into an interior channel of the coil when the coil drum assembly is in a retracted position, the coil drum assembly is configured to support the coil when the coil drum assembly is in an extended position and rotate during deployment of the spoolable pipe, and the first tower and the second tower are configured to move the coil drum assembly vertically.

A method of converting a subsea laying system of a surface vessel from a laying mode to an abandonment or recovery mode Includes clamping at least one tubular sleeve in at least one clamp of the laying system. A winch wire can then run longitudinally through the or each clamped sleeve when suspending an elongate subsea element such as a pipe string during abandonment or recovery operations. The sleeve protects gripping pads of the clamp from damage due to dashing with the wire and so makes it unnecessary to remove the pads in preparation for abandonment or recovery.

A hang-off insert for hanging-off a flexible elongate subsea element from a surface vessel has a circular loop that includes circumferentially-spaced support segments. Collectively, the segments define a substantially planar support face of the insert and have respective radially inner faces that define an inner radius of the loop. The radially inner faces of the support segments can be positioned at various radial positions to determine the inner radius of the loop and hence to adapt the circumference of the loop to suit different diameters of elongate subsea elements. With the hang-off insert supported by a hang-off structure of the vessel, a laterally-protruding hang-off feature of the elongate subsea element extending through the loop may be rested on the support face to transfer suspended weight loads to the hang-off structure.

A system for conducting subterranean operations is disclosed and can include a support structure, a first tubular handler coupled to the support structure, and a second tubular handler coupled to the support structure and distinct from the first tubular handler. The system can further include a tool system coupled to the support structure and adapted to perform an operation on a first tubular.

A system disclosed herein comprises a pipeline and a plurality of access node structures axially spaced apart from one another along the pipeline, wherein each of the plurality of access node structures comprises a substantially planar upper surface. Also disclosed is a method for deploying a pipeline that comprises a plurality of future access node structures, wherein, at the time the pipeline is deployed subsea, the future access node structures prevent access to an interior of the pipeline, and wherein the plurality of access node structures comprises at least one of a tapping structure, a pressure-barrier retaining structure that is adapted to receive a pressure-barrier device and a pressure-barrier retaining structure comprised of a recess with a scored pressure-retaining bottom.

A system for conducting subterranean operations is disclosed and can include a tubular storage area, a well center area, and a robotic arm configured to move tubulars. The robotic arm can be coupled to a rig floor and configured to traverse a distance between the well center area toward the tubular storage area.

A tower for a pipe laying system comprises a frame with a leg to support the frame, and a winch support integrally formed with the leg. The winch support is able to receive and support a winch and/or winch components. The winch support can be formed in a lower portion of the tower leg.

A system for deploying a coil of spoolable pipe from a vessel includes a first tower configured to move longitudinally and transversely along a first track coupled to the vessel, a second tower configured to move longitudinally along a second track coupled to the vessel, and a coil drum assembly coupled to the first tower. The first tower is configured to insert the coil drum assembly transversely into an interior channel of the coil when the coil drum assembly is in a retracted position, the coil drum assembly is configured to support the coil when the coil drum assembly is in an extended position and rotate during deployment of the spoolable pipe, and the first tower and the second tower are configured to move the coil drum assembly vertically.