62results about "Pipe-laying vessels" patented technology

The utility model discloses a deepwater lifting pipe-laying ship for a 3000-meter-water-depth double-pipe-laying system, a main ship body of the deepwater lifting pipe-laying ship is arranged to be of a three-layer continuous deck structure, and a bottom layer is a double-bottom layer and is used for arranging marine equipment; the middle layer is a freeboard deck and is used for arranging an S-Lay pipe laying area; the upper layer is a main deck and is used for arranging a J-Lay pipe laying area and a pipe stacking area; a full-rotation crane is arranged at the stern part of the main ship body; a moon pool is arranged in the middle of the main ship body, and a J-Lay tower is arranged on the upper portion of the moon pool. A living building and a helicopter platform are arranged at the bow part of the main hull; a plurality of full-revolving propellers, a plurality of telescopic propellers and a plurality of side propellers are arranged on the outer side face of the bottom of the main ship body. The deepwater lifting platform can continuously work at the water depth of 3000 meters, and is provided with an S-Lay pipe laying system and a J-Lay pipe laying system.

The present application provides a top-lock pull-out type connecting device and an immersed tube construction ship; the connecting device comprising a support member, fixedly connected to the load-bearing element and located on a side of the load-bearing element facing the borne element; a sliding member, been able to slide relative to the load-bearing element in a connection direction of the load-bearing and borne elements; an ejector rod, used to push the sliding member, fixedly connected to the borne element; a first locking member, used to lock the ejector rod, movably connected between an end of the sliding member close to the borne element and the support member, and can to be driven by the sliding member to be close to or away from the ejector rod; and a second locking member, used to lock the sliding member, and connected between an end of the sliding member away from the borne element and the load-bearing element.

An object of the present disclosure is to enable collection of information indicating a state of an underwater structure, and thereby improve the efficiency and reliability of an above-water system including above-water and underwater structures connected to each other. The present disclosure is a control system configured to: collect a strain distribution of an underwater structure connected to an above-water structure; and control at least one of the underwater structure and the above-water structure in accordance with the strain distribution.

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.

A system (1) for the offshore crane transfer of pipe joints (2) comprises a pipe carrier vessel (3), a pipelay vessel (4), a boom crane (7) on the pipelay vessel (4), a crane hook (11) comprising a base portion (15) a hook portion (16) rotatable with respect to the base portion (15) by a yaw adjusting motor (18), a crane control system (25) automatically controlling the yaw adjusting motor (18) to rotate the hook portion (16) together with a spreader bar (13) about a vertical yaw rotation axis (17), the spreader bar (13) comprising electrically controlled pipe connectors (26) to engage the pipe joint (2) and connect the pipe joint (2) to the spreader bar (13), the base portion (15) of the crane hook (11) forms at least two lifting rope attachment seats (28) horizontally spaced apart by at least a minimum horizontal lifting rope distance (29) of more than 2 meters, at least two lifting ropes engaging the two lifting rope attachment seats (28) and extending from the lifting rope attachment seats (28) upward to a crane boom (8) with at least said minimum horizontal lifting rope distance (29) therebetween, rigging ropes (14) extending between the crane hook (11) and the spreader bar (13) at a rigging rope angle (30) to the horizontal in the range of 40° and 55°.

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).

A system (1) for the offshore crane transfer of pipe joints (2) from a pipe carrier vessel (3) to a pipe laying vessel (4) comprises a pipe carrier vessel (3) having a pipe transfer station (5), a pipelay vessel (4) having a pipe landing station (6), a boom crane (7) positioned on the pipelay vessel (4) with a spreader bar (13) hangingly connected to a crane hook (11), wherein the spreader bar (13) comprises electrically controlled pipe connectors (26) to connect a pipe joint (2) to the spreader bar (13), motor driven flywheels (32) rotating about dedicated flywheel axes (33), and an electrically controlled flywheel adjusting system (34) for adjusting an orientation of the flywheel axis (33) with respect to the spreader bar (13) to generate and apply a yaw rotation moment about a vertical yaw rotation axis (17) to the spreader bar (13).

The invention discloses a boat-plough integrated coupling subsea pipeline ditching protection method which mainly comprises the following steps that a ditching plough is lowered from a construction ship, the ditching plough falls to the position over a subsea pipeline, and pipe holding and pipe supporting are prepared; after the furrow plough completes pipe holding and pipe supporting, the plough shoe descends; the plough share is closed, the ditching plough starts to make a slope, and ditching is started; the ditching depth of the ditching plough is adjusted, and ditching operation is started along the route; the ditching operation is completed, the ditching machine is lifted, and the umbilical cable and the towing cable are recycled, so that the ditching plough is recycled to the deck. The boat-plough integrated coupling subsea pipeline trenching protection method provided by the invention has relatively high dredging capacity and trenching precision, and a large amount of subsea trenching operation can be completed within a short time, so that the construction efficiency is improved. According to the method, the neat V-shaped gullies can be dug, the shear strength of adjacent soil is not reduced, the gullies are accurate, and the precision requirements of laying of various subsea pipelines can be met.

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 drag-reducing separator plate for a moonpool, wherein the upper part thereof is a straight wall perpendicular to the sea level, the lower part thereof is connected to a baffle, and a connecting portion is connected between the straight wall and the baffle. The connecting portion may be in the shape of an arc. The shape of the drag-reducing separator plate matches that of the rear wall of the moonpool. During navigation, the drag-reducing separator plate is located in the middle or front of the moonpool, and can cooperate with a drag-reducing notch on the rear wall of the moonpool to greatly reduce the drag induced by intense sloshing of water in the moonpool during navigation of an offshore vessel. When offshore operations are performed under a station keeping condition, the drag-reducing separator plate is moved to the rear wall of the moonpool to avoid hindering the offshore operations.

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 invention discloses a pipe laying ship suitable for a beach, and belongs to the technical field of pipe laying equipment, the pipe laying ship suitable for the beach comprises a ship body assembly, a ship body component, a wheel body structure and a lifting structure, the wheel body structure is assembled on the ship body structure and forms a supporting and moving carrier of the ship body component, and the lifting structure is assembled on the ship body component. The lifting structure is assembled on the ship body structure and is configured to drive the ship body structure to ascend and descend; a plowshare assembly; a hoisting assembly; and a placement structure. The pipe-laying ship composed of the ship body assembly, the plowshare assembly, the hoisting assembly and the placing structure is arranged, walking is achieved through the wheel body structure of the ship body assembly, the height adjustment of the ship body assembly and the plowshare assembly is achieved in cooperation with the lifting structure, the pipe-laying ship can smoothly advance on the mud flat, ditching and backfilling operation is achieved at the same time, and the working efficiency is greatly improved; the workload is reduced.

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.

A hang-off system comprising at least one support block (30) that is movable forwardly toward a launch axis for engagement with an elongate element (34) being laid from a vessel into water, wherein: 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; each plate comprises upright side faces joined by an upper face (46) that is narrower than either of the side faces of that plate; and the upper faces (46) of the plates together define an upper face of the support block.

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).

The present application provides a top lock-pull-out type coupling device and an immersed pipe construction vessel, the coupling device comprising: a support member fixedly coupled to the load-bearing element and installed on a first side of the load-bearing element facing the supported element; a sliding member slidable relative to the load-bearing element in a coupling direction of the load-bearing element and the supported element; an ejector rod used for pushing the sliding member and fixedly coupled to the supported element; a first locking member used for locking the ejector rod and movably coupled between a first end of the sliding member close to the supported element and the support member, and operable by the sliding member to move toward or away from the ejector rod; and a second locking member used for locking the sliding member and coupled between a second end of the sliding member remote from the supported element and the load-bearing element.

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.

Method for installing at least one sleeve around a portion of an underwater fluid transport pipe The invention relates to a method for installing at least one sleeve around a portion of an underwater fluid transport pipe, the sleeve (8) being formed by two half-shells (8a, 8b), the method comprising maintaining the pipe in a mainly vertical position, gripping the two half-shells of the sleeve (8) on their inner face by a sleeve loading system (100) positioned on one side of the pipe, aligning the two half-shells with the axis (YY) of the pipe, gripping the two half-shells by their outer face by a sleeve positioning and locking system (200) positioned on a side of the pipe opposite that of the sleeve loading system,the pivoting of each half-shell around an internal axis (ZZ) aligned with the axis of the pipe to close it on a portion of the pipe, the positioning of the sleeve along the axis of the pipe, the complete closing and locking of the two half-shells on the portion of pipe, and the removal of the sleeve positioning and locking system. Figure for abstract: Fig. 5.,