27results about "Pipe-laying vessels" patented technology

The invention belongs to the technical field of ocean engineering, and discloses an inclination angle adjusting device, a pipe laying tensioner, a pipe laying ship and an adjusting method.The inclination angle adjusting device comprises a fixed support, a movable support, a hydraulic cylinder, a hydraulic cylinder and a hydraulic cylinder, and the fixed support is used for being hinged to one end, in the pipe laying direction, of a base of the pipe laying tensioner; the sliding adjusting assembly comprises a base, a sliding mechanism and a driving mechanism; the base is located at the end, away from the fixed support, of the base, and the sliding mechanism is slidably connected to the base and used for being hinged to the end, away from the fixed support, of the base. The driving mechanism is arranged on the base, connected with the sliding mechanism and used for driving the sliding mechanism to reciprocate in the pipe laying direction so as to adjust the inclination angle of the pipe laying tensioner. According to the dip angle adjusting device, the dip angle of the pipe laying tensioner can be automatically adjusted according to the actual dip angle of the pipeline, it is guaranteed that the dip angle of the pipe laying tensioner is consistent with the actual dip angle of the pipeline, the applicability of equipment is improved, the requirements of different working conditions of a pipe laying ship are met, and the service life of the equipment is prolonged.

A method of installing a steel catenary riser comprises progressively unspooling and launching the riser from a reel-lay vessel. The riser is plastically deformed in a straightening process aboard the vessel downstream of unspooling and upstream of launching the riser. The straightening process is adjusted to form a series of two or more residual curvature loops of locally increased curvature in a length of the riser suspended in the water column above a touch-down point. Successive loops of the series are separated and joined by a straighter portion of the riser of lesser curvature than those loops. Buoyancy elements are attached to at least one straighter portion of the riser above at least one of the loops of the series, or between successive loops of the series, or above the series of loops.

Clamping pad for a friction-based tube retention device used in the subsea hydrocarbon production industry. The invention relates to a clamping pad (4) for a friction-based tube retention device (6) comprising a steel casing (8) in which a cavity (10) is formed, having a bottom (12) and two lateral edges (14). The cavity is filled with a flexible polymer material (16) in which are housed a plurality of gripping bars (18, 18a), each having a portion embedded in the flexible material and a portion protruding from it.The embedded portion of the lateral gripping bars (18a) closest to the two lateral edges of the cavity each has a different geometric shape from the other gripping bars (18) and each has a truncated, cylindrical lateral face (22a) so as to create a channel (C) of flexible material with a substantially constant width between the embedded portion of the lateral gripping bar and the lateral edge of the cavity. Figure for the abbreviation: Fig. 3.

The invention relates to a method for installing at least one sleeve around a portion of an underwater pipe for transporting fluids, the sleeve being formed by two half-shells (8a, 8b), the method comprising maintaining, in a mainly vertical position, the pipe, the two half-shells of the sleeve being gripped on the side of their inner face by means of a sleeve-loading system (100) positioned on one side of the pipe, aligning the two half-shells with the axis (Y-Y) of the pipe, gripping the two half-shells by their outer face by means of a sleeve positioning and unlocking system (200) positioned on a side of the pipe opposite that of the sleeve-loading system, pivoting each half-shell about an inner axis (Z-Z) aligned with the axis of the pipe in order to close it onto a portion of the pipe, positioning the sleeve along the axis of the pipe, fully closing and locking the two half-shells onto the pipe portion, and removing the sleeve positioning and unlocking system.

An apparatus (40) for mounting a bouyancy aid (10) on an elongate line (84), the buoyancy aid (10) having an upper portion (12b) and a lower portion (12a) which are separable to enable the buoyancy aid (10) to be mounted on the elongate line (84), the apparatus (40) comprising a movable frame (42) on which is mounted a support cradle (44) and a opening arrangement (46), the opening arrangement (46) having a gripper (48) which is operable to grip an upper portion (12b) of a buoyancy aid (10) placed on the support cradle (44), the apparatus (40) further comprising a drive system which is operable to move the frame (42) between a loading position in which a buoyancy aid (10) may be placed on the support cradle (44) and an installation position, and also to move the opening arrangement (46) and / or the support cradle (44) relative to the frame (42) in such a way that when the gripper (48) is gripping the upper portion (12b) of a buoyancy aid (10) placed on the support cradle (44), the upper portion (12b) separates from the lower portion (12a).

The application discloses a tower pipe-laying system and belongs to the technical field of ship pipe-laying. The system comprises a laying tower arranged at the stern of a pipe-laying ship, a pipeline traction device, a driving mechanism and two rotating support frames symmetrically arranged on the laying tower. The two ends of the laying tower are respectively provided with arc-shaped guide components and arc-shaped guide rails arranged in the same circle center, the two ends of the rotating support frames are respectively in sliding fit with the arc-shaped guide components and the arc-shaped guide rails, and the two rotating support frames are connected with a centering wheel mechanism through a connecting component. The driving mechanism can drive the rotating support frames to move along the arc-shaped tracks, drive the centering wheel mechanism to rotate and adjust the spatial orientation, and accurately guide the pipeline to the traction device. The application solves the problems of insufficient pipeline centering precision, easy wearing of a guide mechanism and easy swinging of the pipeline, which affects the pipe-laying efficiency and operation safety, and can significantly improve the pipeline centering precision, the pipe-laying efficiency and the offshore operation safety.

A method of installing a steel catenary riser comprises progressively unspooling and launching the riser into water from a reel-lay vessel. The riser is plastically deformed in a straightening process aboard the vessel, downstream of unspooling and upstream of launching the riser. The straightening process is adjusted to form at least one residual curvature loop of locally increased curvature in a length of the riser that will be suspended in the water above a touch-down point in use. Ballast weights are then attached to the at least one loop. Buoyancy elements may be attached to the riser above the at least one loop.

A mooring positioning system and method for an HDPE pipe (100). The mooring positioning system for an HDPE pipe (100) comprises a barge (1), a floating crane (2), a tugboat (3), a plurality of auxiliary ships, and a plurality of positioning anchors (4); the tugboat (3) is used for towing the HDPE pipe (100); the barge (1) and the floating crane (2) are used for positioning the HDPE pipe (100) from two ends of the HDPE pipe (100); the positioning anchors (4) are symmetrically arranged on two sides of the HDPE pipe (100); the positioning anchors (4) are used for positioning the HDPE pipe (100); and the auxiliary ships are used for moving the HDPE pipe (100).

The present invention relates to a method for mounting at least one sleeve around a partial region of an underwater fluid transport pipeline. The sleeve is composed of two half shells (8a, 8b). The method includes: holding the pipe in a substantially vertical position; clamping the inner surfaces of the two half shells of the sleeve by means of a sleeve loading system (100) located on one side of the pipe; the two half shells are parallel to the axis (Y-Y) of the pipeline; the outer surfaces of the two half shells of the sleeve are clamped through a sleeve positioning and locking system (200) located on the side, opposite to the sleeve loading system, of the pipeline; then the two half shells are rotated around the inner axis (Z-Z) parallel to the axis of the pipeline, so that the two half shells are closed on the partial area of the pipeline; then the sleeve is positioned along the axis of the pipeline, so that the two half shells are completely closed and locked on the partial area of the pipeline; and finally, the sleeve positioning and locking system is dismantled.

An arrangement (100) for loading an elongated element (1500) onto a support surface (301) of a floating body such as a vessel (300), the arrangement (100) comprising: - a hoisting device (302); - one or more storage structures (201, 202, 203, 204), adapted for holding an individual elongated element (1500) in lying condition while being sea-fastened; - a longitudinal and a transverse skidding system, operable independently, o the longitudinal and transverse skidding system each comprising one or more transport carts (401, 601) displaceable over the support surface (301) according to a path in longitudinal respectively transverse direction, and o any of the transport carts (401, 601) being equipped with a support cradle (403, 611), the one or more support cradles of both the longitudinal and transverse skidding system being adapted to carry an elongated element extending in longitudinal direction.

An installation vessel for laying a subsea pipeline comprises a tensioner 30 that is operable to maintain top tension while controlling lay motion of the pipeline. A hang‑off module 34 beneath the tensioner 30 is operable at that position to engage the pipeline when the lay motion is paused. The hang‑off module 34 is movable downwardly and upwardly, and optionally also horizontally, while holding a catenary portion of the pipeline suspended beneath. After engaging the pipeline with the hang‑off module 34, the pipeline is cut to define an upper pipeline portion 14U and a lower pipeline portion 14L. The hang‑off module 34 is lowered with the lower pipeline portion 14L to create a gap 40 between the upper and lower pipeline portions. After inserting an accessory 42 into the gap 40 and connecting the accessory 42 to the upper and lower pipeline portions, the hang‑off module 34 is disengaged from the lower pipeline portion 14L and lay motion of the pipeline is resumed.

A gripping assembly for gripping a tubular body; the gripping assembly (3) is liftable by a lifting crane (5) and has an elongated frame (13), which extends along a first longitudinal axis (A1); a pair of gripping devices (15), each of which is disposed at a respective end of the elongated frame (13) and is configured to grip the tubular body (2); and a positioning system (16) configured to align the gripping assembly (3) with the tubular body (2) to be gripped so as to arrange the two gripping devices (15) at opposite ends of said tubular body (2).

A hang-off system comprises at least one support block that is movable toward a launch axis for engagement with an elongate element such as a flexible pipeline being laid from a vessel into water. The or each support block comprises an array of plates that together define an engagement face of the support block and are movable relative to each other to conform a contour of the engagement face to a contour of the element.

To provide a stinger capable of properly controlling the stress of a pipeline during laying, and a method for mounting the stinger.SOLUTION: A stinger (10) for guiding a pipeline (4) includes a first roller 20A and a second roller 20B, wherein the pipeline (4) is supported by the first roller 20A and the second roller 20B, and wherein one of the first roller 20A and the second roller 20B moves upwardly and downwardly with the other.SELECTED DRAWING: Figure 3

The invention relates to the field of marine equipment, in particular to an engineering ship capable of laying pipes and cables, which comprises a ship body provided with an upper deck and a lower deck; the upper layer pipe laying auxiliary operation line is arranged on the upper deck; the pipe stacking area corresponds to the upper-layer pipe laying auxiliary operation line and is used for storing pipes; the lower layer pipe laying auxiliary operation line is arranged on the lower deck; the pipe laying main operation line is arranged on the lower deck and corresponds to the lower-layer pipe laying auxiliary operation line; the cable storage device is arranged on the upper deck and used for storing cables; the first cable laying operation line is used for guiding the cable in the cable storage device to carry out shallow water cable laying operation; and the second cable laying operation line is used for guiding the cable in the cable storage device to carry out deepwater cable laying operation or carrying out shallow water cable laying operation synchronously with the first cable laying operation line. According to the engineering ship, the production cost can be saved, and meanwhile the operation efficiency is improved.

An installation vessel for laying a subsea pipeline 14 comprises a tensioner 30 that is operable to maintain top tension while controlling lay motion of the pipeline 14, a hang-off module 34 beneath t

To provide a method and a system for attaching a stinger capable of appropriately controlling the stress of a pipeline during laying.SOLUTION: A method for mounting a stinger for guiding a pipeline on a stern of a barge, the stinger comprising a first roller and a second roller, the pipeline being supported on the first roller and the second roller, the method comprising: moving the first roller and the second roller in an upward direction and a downward direction; and performing a simulation of stress on the pipeline, wherein the moving is performed based on a result of the simulation.SELECTED DRAWING: Figure 3

An overboarding device (110) contiguously supports a flexible elongate element (12)whilst overboarding the flexible elongate element (12) from a vessel (114). The device comprises a movable support element (118) for supporting the flexible elongate element (12), the movable support element (118) having a plurality of support members (120) and each support member (120) having a support surface (140). At least one chain element(122) moves the movable support element (118), and the chain element (122) has a plurality of chain members (124). Each chain member (124) is attached to at least one said support member (120) and is pivotably attached to at least one adjacent chain member (124) at a chain pivot (158). A pivotable interface (166) between support surfaces (140) of adjacent support members (120) is positioned coaxially or substantially coaxially with the chain pivot (158) of the corresponding chain members (124).

This application relates to a barge and a construction method for an immersed tunnel that integrates the leveling of a crushed stone foundation and the sinking of immersed tunnel sections, and belongs to the technical field of immersed tunnel construction. The integrated barge includes a hull, a leveling device, and an immersed tunnel section suspension device. The hull includes two floats and two transverse beams. The space located below the transverse beams, between the two floats, is used to house the immersed tunnel sections. The hollow area surrounded by the two floats and two transverse beams constitutes a moonpool. The leveling device includes a large vehicle, a small vehicle, and a leveling execution mechanism. The leveling execution mechanism is switched between an working state and a non-working state by inverting in a plane perpendicular to the large vehicle via the small vehicle. The immersed tunnel section suspension device is used to connect the immersed tunnel sections in the space located below the transverse beams and to control the sinking of the immersed tunnel sections. This integrated barge combines the functions of leveling the crushed stone foundation and sinking the immersed tunnel section into a single unit, effectively reducing the number of vessels required at the immersed tunnel construction site, thereby increasing construction efficiency and lowering construction costs.

The invention provides a device facilitating butt joint of pipeline buoyancy tanks. The device comprises a transverse moving assembly installed on a stern, an overturning assembly arranged on the transverse moving assembly and two leveling assemblies symmetrically arranged on the overturning assembly. The leveling assembly is rotationally connected with a rail plate, and the rail plate is slidably connected with a sliding frame with a sliding groove in the inner side. The leveling assembly can enable the port of the sliding groove of the sliding frame to be aligned with the hanging lug on the box body; the sliding frame can move in the direction away from the stern along the track plate, so that the hanging lugs on the box body can be inserted into the corresponding sliding grooves. When the sliding frame continues to move to enable the hanging lug to reach a preset position in the sliding groove, the hanging lug is positioned and locked through a locking fixing assembly arranged at the top end of the sliding frame, and then the box body can be sequentially leveled, retracted, overturned by 90 degrees towards the stern end and transversely moved under the control of the controller so that a pipeline connector on the box body can be aligned with a pipeline on the seabed. The welding convenience of the buoyancy tank and the pipeline is improved, and interference of sea surface storm waves on welding operation is effectively reduced.

Maximum Flexibility Clamping Pad for Friction Retaining Device of a Fluid Transport Tube. The invention relates to a clamping pad (4) for a friction retaining device of a tube (6) comprising a steel casing (8) in which a cavity (10) is formed, having a bottom (12) and two lateral edges (14). The cavity is filled with a flexible polymer material (16) in which a plurality of gripping bars (18a, 18b) are housed. The lateral gripping bars (18a) each have a different geometric shape from the other gripping bars (18b) and each have a lateral face (22a) having a rounded profile conforming to the profile of the corresponding lateral edge of the cavity and which is in sliding contact with it. Means (24) are provided for confining the flexible material in the cavity between the gripping bars at their respective contact faces. Figure for the abstract: Fig. 3.

A hang-off system comprises support blocks that are movable toward a launch axis for engagement with an elongate element such as a flexible pipeline being laid from a vessel into water. Each support block comprises an array of plates that together define an engagement face of the support block and are movable relative to each other to conform a contour of the engagement face to a contour of the element.

A manipulator device to apply modules around a pipeline during assembly has two jaws mobile between an open and a closed position and configured to house the respective portions of the module, and an articulated mechanism having a plurality of degrees of freedom to place the jaws in a loading position and in a position wherein the jaws are aligned with the pipeline during assembly.