Heerema Marine Contractors | Date: 2013-08-12
A trenching device (1) for forming a trench (2) in a seabed (3) to receive an elongate object, such as a pipeline, said trenching device (1) comprising a base frame (6), and a trenching wheel (7) which is connected to the base frame (6) and rotatable about a trenching wheel axis (8) to form the trench (2), wherein the trenching device (1) is configured to push the trenching wheel (7) into the seabed (3) when the trenching wheel (7) is positioned on the seabed (3).
Heerema Marine Contractors | Date: 2013-05-13
A method of laying a pipeline (100) on a seabed (9), said method comprising the steps of: constructing a section of pipeline (6) by interconnecting pipe sections (31), positioning the section of pipeline on an underwater storage surface (74), and recovering the section of pipeline from the under water storage surface and spooling the section of pipeline on a reel (2) provided on a vessel (15).
Heerema Marine Contractors | Date: 2013-06-19
The invention relates to an inspection apparatus (65) for inspection of a weld (55), the apparatus having a first illumination system (67) to provide a first radiation beam (69) to generate an ultrasonic surface displacement in a weld (55). Further the apparatus has a second illumination system (73) to provide a second radiation beam (75) at the weld (55) and a detector (77) for receiving the reflections (79) from the second radiation beam (75) and to detect the ultrasonic surface displacements at the weld (55) caused by the first radiation beam (69) from the reflection (79) of the second radiation beam (75) on the detector (77).
Heerema Marine Contractors | Date: 2014-07-25
The invention provides a lifting device (1) for lifting a leg of at least one part of a sea platform comprising a support structure and a top side, wherein the lifting device comprises: a base structure (2) to be mounted on a vessel; a gripping device (3) to grip the leg, wherein the gripping device is movably supported with respect to the base structure; a support device (4) mounted on the base structure, and a lifting beam (5), wherein a first end of the lifting beam is configured to be supported at a support location of the support device and wherein a second end of the lifting beam opposite to the first end is configured to be connected to the gripping device.
Heerema Marine Contractors | Date: 2014-09-09
Method for removing at least part of a sea platform comprising a support structure with at least one cylindrical support beam located under water, which method comprises the steps of; providing a device for cutting one of the at least one cylindrical support beams, attaching the device in the circular configuration under water to one of the at least one cylindrical support beams with the fastener, wherein the nozzle openings of the molten metal jet cutting units are directed to and at least partly surround said cylindrical support beam, igniting the fuel material of the molten metal jet cutting units with the igniter to cut said surrounded cylindrical support beam with the molten metal jetted out of the nozzle openings, lifting the disconnected part of a platform to be removed with a removal vessel provided near the support structure, and transporting the disconnected part of the sea platform to be removed to a different location.
Heerema Marine Contractors | Date: 2014-07-29
A riser assembly for transporting a fluid from a vessel and on a seabed includes an elongate frame having a first frame end and a second frame end, where the first frame end is connected to the seabed and the second frame end is connected to a buoy, at least one riser for transporting a fluid and connecting the at least one riser to the second frame end and/or the buoy.
Heerema Marine Contractors | Date: 2013-02-20
A vessel (1) for removal and/or installation of at least a part of a sea platform comprising a support structure and a top side, said vessel comprising a hull (6) and two support arms (11,12) located at a distance from each other and attached to the hull (6), wherein the support arms in use extend beyond the hull in a substantially horizontal direction.
Heerema Marine Contractors | Date: 2013-04-12
A method of manufacturing a Field Joint Coating (FJC) for a pipeline, the method comprising: providing a pipe section to be joined to a similar pipe section or free end of a pipeline, wherein each pipe section is provided with a coating comprising a thermal insulation layer over a length of the pipe section having a protruding section, wherein the end zones of each pipe section are free of thermal insulation, thereby allowing access to the ends of the pipe section and the pipeline to connect the pipe section with the free end of the pipeline, applying an anti-corrosion coating layer on a connection region of the joined ends of the pipe section and the pipeline, heating the protruding section and applying an intermediate coating layer of a thermoplastic material on the anti-corrosion coating layer and the protruding section, applying a thermal insulation layer on the intermediate coating layer.
Heerema Marine Contractors | Date: 2012-02-07
A method of performing an under water operation on a structure (10) or in the vicinity of the structure includes providing a device (18) having a movable arm (20) and at least a first support (22) constructed to be connected to the structure, the movable arm (20) directly or indirectly connected at a proximal end (34) to the support, the first movable arm having a first tool (30) connected to a distal end (36) of the first movable arm, at least one actuator (33) configured to controllably move the first tool (30) in a three dimensional working range in order to position the first tool at a target location, attaching the device to the structure via the at least one support, and-moving the tool in three dimensions and performing an operation under water.
Heerema Marine Contractors | Date: 2013-06-11
A device (10) for performing an under water operation on an at least partially submerged structure (40) or in the vicinity of the at least partially submerged structure includes a base (15) including at least one coupling (20) for coupling the device to the structure; at least a first articulated movable arm (30) directly or indirectly connected at a proximal end thereof (31) to the base, the first movable arm including a tool (60) connected to a distal end (29) of the first movable arm, where the tool is movable in a three dimensional working range about the base, where the base includes at least one rail (22A, 22B), and where the movable arm (30) includes a support carriage (32) which engages with the rail in order to allow the movable arm to move along the rail.