Abstract:
La présente invention concerne u n procédé de dépose d'une ligne sous-marine (1) au fond de la mer (20) depuis la surface (30), pour en connecter l'extrémité inférieure ( la) à u n élément de raccordement ( 11a) au fond de la mer, caractérisé en ce que l 'on réalise les étapes dans lesquelles : 1) on positionne ladite ligne sous-marine suspendue depuis la surface (30) en position sensiblement verticale (7) dans sa partie inférieure ( 1 -1), comprenant u n dispositif de courbure s'étendant entre deux points (la, I b) dénommés points de fixation ou guidage, comprenant au moins u n câble (5) et des moyens de tensionnement (6- 1 à 6-5) dudit câble aptes à diminuer la longueur de câble s'étendant entre les deux dits points de fixation ou guidage ( la, I b), depuis une longueur maximale L0 jusqu'à u ne valeur l imite inférieure donnée L1, et 2) on déplace l'extrémité inférieure ( I c) de ladite ligne sous-marine, de manière à écarter (D) l'extrémité inférieure (I c) de ladite ligne sous- marine de sa position initiale de l'étape 1), et 3) si nécessaire, on déplace ladite ligne sous-marine ( 1) en la rapprochant d u fond de la mer (20), concomitamment à la descente additionnel le de dite ligne, depuis la surface (30), puis 4) on finalise le positionnement et la connexion de ladite extrémité inférieure ( 1c) de la ligne a u fond de la mer.
Abstract:
The invention concerns a system for bearing and bolstering bridge sections for underwater pipelines that has a frame (1) bearing a self-locking, vertically movable slide block (8) that has in its lower section mechanically expandable gripper fingers (24) that can be locked in grasping and lifting the pipeline; the frame (1) also has extendable self-locking props (35) as well as means of coupling to a laying module, from which all installation functions can be controlled.
Abstract:
A clamping apparatus (10) for lockingly engaging and supporting an elongate body (11), such as a pipeline span extending above an irregular sea bed. The clamping apparatus (10) includes a saddle (12) shaped to overlie the pipeline span to be supported and an anchor frame (13) straddling the saddle (12) and pivotably coupled thereto. The saddle (12) includes clamps (20a, 20b) which automatically swing to a closed position when the saddle (12) is seated on the elongate body (11). The clamps (20a, 20b) may be releasibly locked in the closed position. The anchor frame (13) has extensible legs (40) for supporting the elongate body (11) on an underlying support surface, such as a sandy sea bed. A toolpost (105) may be removably connected to the clamping apparatus for remotely controlling operation of the locking and support leg extension mechanisms.
Abstract:
A deep ocean water intake equipment using a riser pipe with a mooring function is provided to take the deep ocean water at low cost by installing the riser pipe vertically, using an anchor connected with a weight and a mooring rope, and to contribute sea areas to fishery formation by forming a marine plant inhabitation device. A deep ocean water intake equipment using a riser pipe(20) with a mooring function comprises a weight(30), an anchor(40), and small weights(51). A flexible hose(27) is installed at the upper part of the riser pipe. The weight is placed to install the riser pipe vertically. The anchor is connected with the weight and a mooring rope(50). The small weights are installed to make the mooring rope curved like S. A vessel(80) and an underwater pump(70) connected with a flexible hose(28) take the deep ocean water. A buoyancy(10) generates buoyancy. An expanded part(23) is formed at the upper part of the riser pipe. A check value(26) is installed at the upper part of the expanded part. A marine plant inhabitation device(60), which has a frame(61) and a net(62), is installed at the upper part of the riser pipe.
Abstract:
본 발명은, 해양 저면에 설치되는 고압 전기 케이블 보호용 자켓 앵커블록에 관한 것으로, 특히 우레탄 덮개와 콘크리트 앵커 블록을 케이블 보호막으로 설치하여 케이블을 보호함과 아울러, 케이블의 하자를 예방하도록 하는 고압 전기 케이블 보호용 자켓 앵커블록 설치구조에 관한 것이다. 본 발명은, 해저면에 설치되는 케이블에 있어서, 상기 케이블에는, 반원형 단면의 상,하부 우레탄 커버가 밀착되고, 그 상,하부 우레탄 커버의 외측에 상,하부 자켓블록이 밀착되며, 상기 상,하부 자켓 블록에 인장 와이어가 체결 볼트에 의하여 체결되어 작업 바지선의 상부에서 해저면으로 투하하여 케이블을 설치하는 한편, 상기 상,하부 자켓블록은, 2개 1조의 동일한 형태로, 중앙에 반원홈부가 형성되고, 그 반원홈부의 양측에 플랜지부가 형성되며, 그 플랜지부에 관통홀이 형성되고, 상기 인장 와이어에는, 다수개의 와이어 연결고리가 설치되고, 그 와이어 연결고리에 체결 볼트가 용접되어 상,하부 자켓 블록을 상호체결하는 것을 특징으로 하는 고압 전기 케이블 보호용 자켓 앵커블록 설치구조를 제공한다.
Abstract:
Resting device (1) of at least one portion of a linear structure (2) for crossing an uneven underwater topography, wherein said resting device (1) is suitable for supporting at least one portion of said linear structure (2) that defines a longitudinal direction (X - X) coincident with or parallel to the longitudinal development direction of said linear structure (2); said resting device (1) comprising at least one buoyant element (3) and at least one tether (4), suitable for constraining said resting device (1) to a bed (5), wherein said at least one buoyant element (3) is suitable for providing a sufficient buoyancy to keep said at least one tether (4) under tension, and wherein said resting device (1) also comprises a deck (6) having a shape and material that allows distributed resting of at least one portion of said linear structure (2) on said resting device (1).
Abstract:
Methods of laying subsea pipeline (1300) on a seafloor comprising: providing a pipe laying vessel (1100), placing a spooling structure assembly (1200) on the seafloor, and laying the subsea pipeline (1300) in a loop around the spooling structure assembly and associated systems.
Abstract:
A flowline for hydrocarbon is laid on the seabed using the reeled lay method Successive pipe sections have opposing ends which are joined by an anchor collar butt welded to the opposing ends The pipe sections have a exterior jacket Anchor collars are affixed by butt welding between the ends of adjacent pipe sections Each anchor collar has a fixture protrusing radially outward having an outer diameter less than or equal to the outer diameter of the jacket The flowline has the same inner diameter at the pipe sections and the collar, and the pipe has the same outer diameter as the collar, while the protrusion protrudes outward from the exterior of the collar The flowline is anchored by unreeling it, applying a clamp to the collar, and anchoring the clamp to the seabed The jacket may expose the Fixture or protrusion or may be removed to enable the clamping
Abstract:
The disclosure provides a system and method for installing subsea equipment (11), such as a pipeline and equipment associated therewith in a target area (3), generally having restricted overhead access. An anchor (5) can be installed in the seabed and can include one or more sheaves (6). A pipeline can be provided, which can include related equipment and/or one or more coupling devices situated remotely from the anchor relative to the target area. A winch wire (18) can be provided and is adapted to be directly or indirectly coupled across at least a portion of the target area (3) to the pipeline (11). A transfer sling (15) having a pull wire (17) and an initiation wire (16) can be coupled between the winch wire (18) and pipeline (11) to assist the winch wire (18) pulling the pipeline (11) into the target area (3) and transferring a pipeline force from the sheave to the anchor independent of the sheave (5).
Abstract:
Le dispositif pour réguler le flambement latéral d'une section de conduite 10 comprend au moins un dispositif 11-15 d'application permanente d'une force sur un point de ladite section de conduite, ladite force étant de préférence sensiblement horizontale et perpendiculaire à l'axe de la conduite. De préférence, il est prévu deux dispositifs d'application d'une force égale et opposée disposés à une distance déterminée l'un de l'autre le long de la section de conduite, chacun des dispositifs comprenant un collier 15, un câble 12, un renvoi 14 et une bouée 11 ou une masse.