摘要:
A cold water pipe assembly, and mechanisms for generating a cold water pipe assembly, are provided. A plurality of mooring lines are secured to a pipe end member. A pipe segment of a plurality of pipe segments is slidably coupled with respect to the mooring lines at a plurality of locations on a pipe wall of the pipe segment. The plurality of pipe segments is iteratively extended to form a pipe assembly of a desired length by joining a next pipe segment to a previous pipe segment to extend the pipe assembly, and lowering the pipe end member and the pipe assembly by extending the mooring lines. At least some of the next pipe segments are slidably coupled with respect to the mooring lines at a plurality of locations on a respective pipe wall of the at least some of the next pipe segments.
摘要:
A support structure (10) suitable for use as a support structure to an offshore platform (12), the support structure (10) comprising a main support strut (30) having a lower end and anchorable, in use, to the seabed (16) and an upper portion arranged, in use, to extend above sea level to a height substantially equal to, or greater than, that of the platform (12), the support strut (30) comprising a guide rail (62) extending upwardly from a level above the sea level (18) to the top of the support strut (30) for cooperating with a raising framework (90) slideably mountable to the guide rail (62), and further comprising drive means (98) cooperating between the raising framework (90) and the guide rail (62) for elevating the raising framework (90) relative to the support rail (62), the support structure (10) being characterised by: the support strut (30) and raising framework (90) each comprising tracks (70, 100) arranged to substantially align end-to-end when the raising framework (90) is elevated to the top of the support strut (30), the tracks (70, 100), when so aligned, forming a substantially continuous track for laterally transferring a payload (42) from the raising framework (90) to the top of the strut (30).
摘要:
A deployment apparatus is described. The deployment apparatus is for deploying an underwater power generator having a power generating main body from a deployment vessel disposed on the surface of a body of water onto a pylon disposed on the bed of the body of water and the deployment apparatus includes: a frame including one or more connectors disposed on a base region of the frame, the connectors for releasable connection to catches disposed on an upper region of the power generating main body, the connectors being remotely operable between a connected position in which the connectors are engaged with the catches and a disconnected position in which the connectors are disengaged from the catches; and one or more cameras disposed on the frame for providing visual guidance to the vessel of the position of the underwater power generator relative to the pylon. A method for deployment of the underwater power generator is also described.
摘要:
A quick-release system for coupling a topside for a fixed or floating platform and a barge for float-over installation of the topside is disclosed. The quick-release system comprises one or more releasable connections, each releasable connection configured to support at least a fraction of the weight of the barge and to be remotely actuated to allow the barge to decouple from the topside. In some embodiments, the quick-release system comprises two plates, one coupled to the topside and the other coupled to the barge, and a plurality of bolts extending therebetween. A frangible nut is coupled to each bolt. The quick-release system is actuatable by an electric signal that causes the frangible nuts to fracture and the barge to subsequently be released from the topside.
摘要:
A new MODU jacking system can reliably handle loads several times greater than can be currently handled, can be inexpensively designed and readily scaled for different jack-up loads, and can save millions of dollars in the manufacture of a single jack-up MODU. In the new MODU jacking system, a plurality of hydraulic continuous linear motion motors are engaged with a plurality of MODU supporting legs to provide relative motion between the MODU platform and its supporting legs, and to also maintain the MODU platform and MODU supporting legs locked in a stationary relationship. In the new jack-up system, the number of hydraulic piston/cylinder units and the number and design of the teeth that are engaged in providing relative motion may be selected to substantially reduce material stresses on the system.
摘要:
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.
摘要:
Method for installing a topside module on an offshore support structure that in use comprises at least one support leg that extends a height above the water level. The method comprises the steps of supporting said topside module on a barge in a position adjacent to said at least one support leg and de-ballasting the barge to lift the topside module a height above water level.
摘要:
A retractable stern reaction frame for reinforcing self elevating platform cantilever beams. The preferred embodiment contemplates a support framework mounted on a self elevating platform transom and positioned to engage the cantilever to project the reaction point farther towards the cantilever reach. The frameworks are to be retractable (or portable) to allow the self elevating unit to position itself closer to the jackets than would otherwise be possible. The framework is designed to transmit the reaction forces back to the main deck, cantilever support bulkheads, inner bottom and bottom structure.
摘要:
A new MODU jacking system can reliably handle loads several times greater than can be currently handled, can be inexpensively designed and readily scaled for different jack-up loads, and can save millions of dollars in the manufacture of a single jack-up MODU. In the new MODU jacking system, a plurality of hydraulic continuous linear motion motors are engaged with a plurality of MODU supporting legs to provide relative motion between the MODU platform and its supporting legs, and to also maintain the MODU platform and MODU supporting legs locked in a stationary relationship. In the new jack-up system, the number of hydraulic piston/cylinder units and the number and design of the teeth that are engaged in providing relative motion may be selected to substantially reduce material stresses on the system.