83results about "Pipe-laying vessels" patented technology

The invention relates to the technical field of HDPE pipeline shipping, in particular to an HDPE pipeline mooring and positioning system and method.The HDPE pipeline mooring and positioning system comprises a barge, a crane ship, a tugboat, a plurality of auxiliary ships and a plurality of positioning anchors, the tugboat is used for dragging an HDPE pipeline, the barge and the crane ship are used for positioning the HDPE pipeline from the two ends of the HDPE pipeline, and the auxiliary ships are used for positioning the HDPE pipeline from the two ends of the HDPE pipeline. The positioning anchors are symmetrically arranged on the two sides of the HDPE pipeline and used for positioning the HDPE pipeline, and the auxiliary ship is used for moving the HDPE pipeline. Compared with a traditional steel pipe pile construction technology, the mooring positioning system provides stable positioning points through the positioning anchors symmetrically arranged on the two sides of the HDPE pipeline, construction steps are simplified through cooperative operation of a tugboat, a barge, a crane ship and an auxiliary ship, particularly, complex steel pipe pile mounting and dismounting do not need to be conducted, the construction time is greatly shortened, and the construction efficiency is improved. And the construction efficiency is obviously improved.

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.

The invention relates to an immersed tube gravel foundation bed leveling, transporting and sinking integrated ship and an immersed tube tunnel construction method, and belongs to the technical field of immersed tube tunnel construction. The integrated ship for leveling, transporting and sinking the immersed tube gravel foundation bed comprises a single ship body, a leveling device, an immersed tube hoisting device and cantilever beams arranged in pairs, the cantilever beams arranged in pairs are symmetrically arranged on the two sides of the single hull in the width direction, the cantilever beams extend out from the single hull to the outer side of a ship side in a cantilever mode in the width direction of the single hull, and a pair of cantilever beams is arranged close to a bow and a stern of the single hull respectively. The leveling device is carried on the single ship body and located between the two pairs of cantilever beams, and the leveling device can turn over in the vertical plane relative to the single ship body so as to be switched between the working state and the non-working state. The immersed tube hoisting device comprises sinking devices which are arranged in one-to-one correspondence with the cantilever beams, and the sinking devices are installed on the cantilever beams. The integrated ship integrates the functions of gravel foundation bed leveling and immersed tube transporting and sinking, and can transport immersed tubes with the width close to the upper limit of the passing width of an inland waterway.

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).

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 present invention provides a submarine pipeline leveling and locking device, comprising a leveling mechanism, the leveling mechanism comprising a leveling device and a locking device; a first material dividing device is arranged between the leveling device and the locking device; the first material dividing device comprises a first material dividing driving device and a first material dividing member; the first material dividing device is controlled to close and lock a material feeding channel; stones are input into the leveling material feeding channel and then discharged; in this way, the submarine base bed is leveled by the leveling device; the first material dividing device is controlled to close the leveling material feeding channel; stones are input into the locking material feeding channel and then discharged from two locking material dividing channels; in this way, the locking of the pipeline is achieved by the locking device.

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).

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

The method comprises : - progressively lifting the flexible line (11) from the body of water (14) on or / and above a recovery installation (10) using a line recovery system (22); - repeatedly processing an upper end region (26) of the flexible line (11) beyond the line recovery system (22) to divide the upper end region (26) in several line sections (12) in a processing stage (24) of the recovery installation (10); - creating an intermediate slack region (30) of the flexible line (11) between a lifted region (108) of the flexible line (11) in the line recovery system (22) and the upper end region (26) in the processing stage (24) to compensate an instantaneous velocity difference between a velocity of the lifted region (108) and a velocity of the upper end region (26).

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 invention relates to an apparatus for storing cable, comprising a cable carousel (1) rotatable about a vertical axis (2), and rotating means (30) for rotating (4) the carousel (1) about the vertical axis (2), for allowing winding cable (5) on the carousel (1) and unwinding cable (5) from the carousel (1). The carousel (1) is received in a pool (7), a seal (10) is arranged between an outer side (12) of the carousel (1) and a pool outer wall (9). A closed chamber (13) is defined in the pool (7) below the carousel (1), and pressurised liquid in the closed chamber (13) provides a positive pressure for supporting the carousel (1) and allowing rotation (4) of the carousel (1).