Abstract: The present invention relates to a gravity based structure 5 with a topside 2 on at least one hollow concrete platform leg 1 with a platform leg wall and a circular cross section. The at least one platform leg, includes an upper leg portion (4) cut off from a lower leg portion 3. The lower leg portion 3 has an upper sloped cut surface 10 inclined at an angle in the range of 1°-10° off a horizontal axis. The upper leg portion 4 has an upper leg sloped cut surface inclined at the same angle as the lower leg sloped cut surface 10 of the lower leg portion 3 whereby the angles are complementary, the sloped cut surfaces forming an inner and an outer obtuse cone with a common vertical longitudinal axis. Furthermore, the invention relates to method of forming a conical cut through a concrete platform leg of a GBS.

Abstract: A wire saw includes a U-shaped cutting area. An endless sawing wire loop runs between a plurality of wire pulleys including at least two displaceable cutting area pulleys, displaceable wire tensioning pulleys and wire plane changing pulleys. The endless wire loop defines a first cutting area plane P1 in the U-shaped cutting area and at least one further wire loop plane dissimilar from the first cutting area plane. The wire plane changing pulleys guide the sawing wire between the first cutting area plane and the further wire loop plane P2. A wire driving pulley is driven by a wire drive motor. A cutting area pulley actuator runs the cutting area pulleys along each side of the workpiece cutting area. The displaceable wire tensioning pulleys are displaceable by at least one tensioning actuator within the further wire loop plane P2 to maintain a tensioned sawing wire.

Abstract: The present invention relates to a gravity based structure 5 with a topside 2 on at least one hollow concrete platform leg 1 with a platform leg wall and a circular cross section. The at least one platform leg, includes an upper leg portion (4) cut off from a lower leg portion 3. The lower leg portion 3 has an upper sloped cut surface 10 inclined at an angle in the range of 1°-10° off a horizontal axis. The upper leg portion 4 has an upper leg sloped cut surface inclined at the same angle as the lower leg sloped cut surface 10 of the lower leg portion 3 whereby the angles are complementary, the sloped cut surfaces forming an inner and an outer obtuse cone with a common vertical longitudinal axis. Furthermore, the invention relates to method of forming a conical cut through a concrete platform leg of a GBS.

Abstract: The present invention relates to a wall structure cutting wire saw. The wire saw includes a master saw unit 12 with master rail elements 35 adapted to run on a first set of tracks 7. The master saw unit 12 includes a wire drive motor 18, a wire magazine 17 accommodating a portion of a of cutting wire 15 in a cutting wire loop, and a saw drive 11 adapted to drive the master saw unit 12 along the first set of tracks 7. The master saw unit also includes a wire tension actuator. A slave unit 13 with at least one slave wire return wheel 23 and slave rail elements 36 is adapted to run on a second set of rails 8. The invention further includes a first set of rails adapted to be secured to a first side of the wall structure; and a second set of rails adapted to be secured to a second side of the wall structure 33. The wall structure 33 may form a wall of a GBS leg.

Abstract: A leg cutting system with a leg support clamp 2 with a height for maintaining a structural integrity of the leg 1 during and after the leg 1 is cut. The system includes at least two leg support clamp parts joined in at least one clamp structure joint 11 with releasable mechanical fasteners for joining or releasing the at least two leg support clamp parts along the at least one clamp structure joint. A wire saw 6 with a wire saw support frame 7 and longitudinal saw tracks 16 for longitudinal displacement of the sawing wire along said longitudinal saw tracks 16 can be fixed to the leg support clamp. A wire replacement unit 9 with a plurality of sawing wires with a joint allowing the wires to be joined is located adjacent the wire saw. The embodiment(s) furthermore relates to a leg support clamp.

Abstract: A wire saw includes a U-shaped cutting area. An endless sawing wire loop runs between a plurality of wire pulleys including at least two displaceable cutting area pulleys, displaceable wire tensioning pulleys and wire plane changing pulleys. The endless wire loop defines a first cutting area plane P1 in the U-shaped cutting area and at least one further wire loop plane dissimilar from the first cutting area plane. The wire plane changing pulleys guide the sawing wire between the first cutting area plane and the further wire loop plane P2. A wire driving pulley is driven by a wire drive motor. A cutting area pulley actuator runs the cutting area pulleys along each side of the workpiece cutting area. The displaceable wire tensioning pulleys are displaceable by at least one tensioning actuator within the further wire loop plane P2 to maintain a tensioned sawing wire.

Abstract: The present invention relates to a wire cutting system and method for subsea cutting of large structures (6). The system includes two feeding towers (2) with feeding tower first ends secured into a seabed floor. A crossbeam (1) is located between the two feeding towers (2). Wire feeding trolleys (8) are connected to the feeding towers (2), whereby the wire feeding trolleys (8) are allowed to move a cutting distance along the feeding towers. A cutting wire (4) traverses between the wire feeding trolleys.

Abstract: The present invention relates to a wire cutting system and method for subsea cutting of large structures (6). The system includes two feeding towers (2) with feeding tower first ends secured into a seabed floor. A crossbeam (1) is located between the two feeding towers (2). Wire feeding trolleys (8) are connected to the feeding towers (2), whereby the wire feeding trolleys (8) are allowed to move a cutting distance along the feeding towers. A cutting wire (4) traverses between the wire feeding trolleys.

Abstract: An apparatus for cutting a tubular part includes a carrying body configured to receive an end of the tubular part. In addition, the apparatus includes a cutting assembly disposed in the carrying body. The cutting assembly includes a continuous ring configured to be rotated relative to the carrying body. Further, the apparatus includes a first cutting element pivotally attached to the continuation ring. The first cutting element includes a cutting edge configured to engage and cut the tubular part. Still further, the apparatus includes a first actuator coupled to the first cutting element and configured to pivot the first cutting element between a retracted position and a cutting position. The apparatus also includes at least one sensor configured to measure a position of the first cutting element and a force applied to the first cutting element.

Abstract: An apparatus for cutting a tubular part includes a carrying body configured to receive an end of the tubular part. In addition, the apparatus includes a cutting assembly disposed in the carrying body. The cutting assembly includes a continuous ring configured to be rotated relative to the carrying body. Further, the apparatus includes a first cutting element pivotally attached to the continuation ring. The first cutting element includes a cutting edge configured to engage and cut the tubular part. Still further, the apparatus includes a first actuator coupled to the first cutting element and configured to pivot the first cutting element between a retracted position and a cutting position. The apparatus also includes at least one sensor configured to measure a position of the first cutting element and a force applied to the first cutting element.

Abstract: A leg cutting system with a leg support clamp (2) with a height h for maintaining a structural integrity of the leg (1) during and after the leg (1) is cut. The system includes at least two leg support clamp parts allowing the leg support clamp (2) to be installed stalled around the leg (1). The at least two leg support clamp parts are joined in at least one clamp structure joint (11) with releasable mechanical fasteners for joining or releasing the at least two leg support clamp parts along the at least one clamp structure joint. A wire saw (6) with a wire saw support frame (7) and longitudinal saw tracks (16) for longitudinal displacement of the sawing wire along said longitudinal saw tracks (16) can be fixed to the leg support clamp. A wire replacement unit (9) with a plurality of sawing wires with a joint allowing the wires to be joined is located adjacent the wire saw. The embodiment(s) furthermore relates to a leg support clamp.

Abstract: The present invention concerns an apparatus for cutting a tubular part (16) extending down into a sea- or ocean bed. The apparatus includes a carrying body (1) adapted to be led over the tubular part (16) that is to be cut, with a cutting assembly placed in the carrying body (1). The cutting assembly includes a ring adapted to be driven in rotation in the carrying body (1). At least one cutting element (6) with a cutting portion (19), is hinged to the ring. At least one actuator (3) is adapted for leading the cutting element (6) between a retracted position and a cutting position against the tubular part (16) that is to be cut. Furthermore it is described an assembly with a cutting apparatus (A) and a carrying body (1) with a least one jaw (15, 28, 29) for fixing and centring the tubular part (16) in relation to the apparatus (A), and a method for subsea cutting of tubular parts (16).

Abstract: The present invention concerns an apparatus for cutting a tubular part (16) extending down into a sea- or ocean bed. The apparatus includes a carrying body (1) adapted to be led over the tubular part (16) that is to be cut, with a cutting assembly placed in the carrying body (1). The cutting assembly includes a ring adapted to be driven in rotation in the carrying body (1). At least one cutting element (6) with a cutting portion (19), is hinged to the ring. At least one actuator (3) is adapted for leading the cutting element (6) between a retracted position and a cutting position against the tubular part (16) that is to be cut. Furthermore it is described an assembly with a cutting apparatus (A) and a carrying body (1) with a least one jaw (15, 28, 29) for fixing and centring the tubular part (16) in relation to the apparatus (A), and a method for subsea cutting of tubular parts (16).

Abstract: A cutting tool especially for difficult accessible structures of materials such as steel, concrete, reinforced materials, carried preferably on and operated by a remote controlled vehicle, where the cutting tool comprises a C-shaped frame (1), the end of the first arm of the frame (1) comprising a rotation device (4), the end of the second arm comprising a mounting device (7), the rotation device (4) and the mounting device (7) being adapted to receive one end of a milling shaft (3) each, and to rotate the milling shaft (3) during operation, the frame (1) thereby being displaced towards the structure (5) one arm of which at each side of the structure, by a feeding mechanism (9) secured to an operating arm (8) on the vehicle.