摘要:
A method for laying a pipeline formed of joined rigid and flexible tubular conduits on an underwater surface, particularly an ocean bed, by using a floating support. The method includes the steps of: loading onto the floating support a length of flexible tubular conduit; laying from the support a length of rigid tubular conduit; connecting the ends of the two conduits together; lowering the conduits; and halting the lowering when the rigid conduit hits bottom, while the other end of the flexible conduit is still in the floating support.
摘要:
A device for laying tubular conduits from a floating support including a pair of clamps for gripping the tubular conduit. Each clamp can alternately provide a restraining force on the tubular conduit to be laid. The device is characterized in that one of the clamps can move relative to the floating support and is submerged.
摘要:
A process for laying flexible conduits on an ocean floor by continuous unrolling of the conduit at a laying site from at least one supply ship to a laying ship, wherein the flexible conduit is gradually transferred from the supply ship to a storage means located on the laying ship.
摘要:
A device for temporarily holding a load on a vertical holding line including two articulated elements forming a pincer, each element having a jaw and an arm, one of the two arms including a connection for fastening to a holding line, the device being able to assume two positions, a first closed position for gripping the held load and a second open position enabling the load to be released; the arm having the ability to intensify the gripping force f which is exerted between the two arms near their end, in order to keep the jaws closed when the load is being gripped. The device further includes a feature for limiting the separation connecting the arms by exerting the gripping force f necessary for maintaining the first closed position of the jaws, the arms having a configuration such that the cable, or the like, for limiting the separation of the lever arms is placed laterally at a distance greater than 3.0 meters relative to the axis of the holding line.
摘要:
A device for mounting a flexible line including a curvature limiter. The device for mounting a flexible line on a structure, including a hollow rigid member forming part of the structure or fixed to the structure, and which the flexible line passes through after having been pulled with the aid of a pull cable fixed to one end of the flexible line, in particular on the end fitting mounted on the latter for connecting it to the structure, and a curvature limiter engaged on the flexible line and secured to fixing means able to interact with fixing means secured to the hollow rigid member for fastening the curvature limiter to the structure. The device further includes means for immobilizing the curvature limiter on the flexible line at a distance from the end of the latter during a first phase of pulling the flexible line at the end of which the curvature limiter is brought to the level of the mouth zone of the hollow rigid member for the purpose of fastening it, the hollow rigid member comprising, at least during the first pulling phase, a flared mouthpiece.
摘要:
A device for laying flexible tubular conduits from a floating support is provided. The flexible tubular conduit has insulating sheaths and reinforcements where the conduit includes a recoverable flexible tubular handling conduit connected to the flexible tubular conduit. The flexible tubular handling conduit has sufficient mechanical strength to withstand the combined action of the highest internal pressure and the axial tensile force corresponding to the apparent weight in water of the length of tubular handling conduit which is suspended between the floating support and the floor, and on the other hand, the isolated action of the axial tensile force corresponding to the apparent weight in water of the length of flexible tubular conduit when the latter is suspended between the floating support and the floor by the flexible tubular handling conduit.
摘要:
A device for laying flexible tubular conduits from a floating support comprises rigid accessories the outer diameter of which is greater than the outer diameter of the conduit. It comprises main, linear winch-type tensioning means (6) for normal lowering of the flexible conduit (3) to be laid. The linear winch has an essentially vertical axis and comprises the last means for guiding the flexible conduit at the level of the floating support (1) and auxiliary holding means (19) which hold the flexible conduit by means of an accessory (21) mounted on the flexible conduit, such as an end fitting or an auxiliary accessory, and enable the main tensioning means (6) to clear a section of flexible conduit on which the accessory (21) is mounted.
摘要:
A device for depositing and recovering a heavy load on the ocean floor including a first part which can be attached mechanically to a handling and recovery cable and a second part which can be attached mechanically to the load to be deposited. The second part is buoyant and includes means for attaching it flexibly to the load. Each of the two parts include a cylindrical joining element, one of which fits inside the other. The device also includes means for locking and unlocking the cylindrical joining elements.
摘要:
A lower portion of a subsea oil delivery hose is held taut between bouyant devices installed on the hose and a stationary point on the subsea floor. A portion of the lower part of the hose, connected to the stationary point, has a curved portion that is concave in the direction of a wellhead to which the hose is connected.
摘要:
A wire-spiralling machine continuously produces a tubular structure comprising a spiral winding, particularly a pressure-armor layer, from two noninterlocking wires of large cross section delivered from two reels of wire and two locking wires delivered from two reels of locking wire. A motorized rotating circular cage carries the four reels of wire and locking wire at its rear, while the downstream face of the cage supports, on two adjustable-inclination plates, two on-board twin-track caterpillars for dragging the wire. These caterpillars are arranged just upstream of guide and/or bend rolls leading the wires towards their respective lay point.