Abstract:
A bending-restricting anchoring arrangement for anchoring a flexible pipe (1a,1b,1c) for the transport of a fluid between a seabe d (8) and a sea surface consists of first (2) and second (3) holding sleeves, which, spaced from each other, are adapted to hold a section of the flexible pipe near the seabed. The first holding sleeve (2) is secured via a rigid connecting member (5) to a fixed point on the seabed, while the second holding sleeve (3) is movable in a well-defined manner relative to the first connecting sleeve. In an embodiment, the second holding sleeve (3) is secured to a support (9) movable on the seabed. The first and second holding sleeves are connected to each other by means of a mechanical coupling (11) which may be formed by a plurality of rigid members (5, 16, 17, 18), which maintain a fixed distance between the holding sleeves (2, 3) and thereby the geometry of the pipe section disposed between the holding sleeves, in several different ways, via connections between the first and second holding sleeves and/or via connections between their respective rigid connecting mem bers. The invention ensures that the forces acting on the flexible pipe because of sea currents, tensile stresses, etc. which occur because of buoyancy when the reinforced pipe is immersed into water, or because of tensile forces that occur because of the use of floating members, are absorbed in the most optimum manner and without any risk of overbending of the section of the pipe (1b) between the connection sleeves (2, 3).
Abstract:
A method of installing pin piles into a seabed A method of installing a plurality of pin piles into a seabed comprising at least the steps of: (a) lowering a pin pile apparatus comprising a first pin pile and an attached clump weight towards the seabed; (b) allowing the first pin pile to self-penetrate the seabed based on self-weight of the pin pile apparatus and the momentum from step (a) until the clump weight reaches the sea bed; (c) disconnecting the clump weight from the first pin pile; and (d) recovering the clump weight for use with a second pin pile and repeating steps (a)-(c). In this way, the pin piles are easily installed from their descent to the seabed with the clump weight, which can then be removed and applied to the next pin pile in an easy and repeatable operation without requiring a suction apparatus or hammer or drill.
Abstract:
Dans cette installation de colonne montante réalisée avec une conduite flexible (10) de type non lié, la conduite (10) est disposée verticalement entre d'une part une connexion mécanique (7') en tête sur une installation de surface (3) et d'autre part une connexion mécanique (6', 6", 6'") en pied avec le fond marin (5), des connexions fluidiques étant prévues en tête et en pied pour relier la colonne montante d'une part avec des équipements de surface et d'autre part avec des équipements de fond (2); le pied de la colonne est à au moins 1000 m de profondeur où il subit un effet de fond inverse maximum calculable F et des moyens tensionneurs (8) imposent en pied de la colonne montante une tension de réaction T supérieure à au moins 50%, voire 100% de l'effet de fond inverse maximum calculable F développé en pied de colonne.
Abstract:
Esta constituida por un cuerpo paralelepipédico (1) con una zona inferior (2) provista de apoyos o patas (3) ubicados en las esquinas, sobre la que entronca una zona superior (4) , también paralelepipédica y de sección trapecial, con una extensión inferior rectangular central (6) y una depresión rectangular (5) en el lado superior. Ambas zonas (2, 4) tienen la misma longitud pero están desfasadas linealmente para determinar medios complementarios de acoplamiento machihembrado en el montaje en línea. Las depresiones rectangulares (5) determinan el lecho para el tendido de la canalización o emisario submarino, cubriéndose el lecho con losas (9) que quedan fijadas con varillas a la zona superior (4) . Las piezas o cuerpos (1) se fijan también entre sí con varillas verticales (15) .
Abstract:
A system and method for securely cradling a subsea pipeline is claimed that lands on one side of the pipeline, is embedded into the sea floor, reaches under the pipeline, positions the cradling structure, and then lifts the pipeline. The system typically comprises a gravity driven pile based device, comprising a pile tower, a roller carriage assembly, and a jacking assembly that engages the roller carriage assembly and pile tower rails.
Abstract:
A method of installing a plurality of pin piles into a seabed including at least the steps of: (a) lowering a pin pile apparatus comprising a first pin pile and an attached clump weight towards the seabed; (b) allowing the first pin pile to self-penetrate the seabed based on self-weight of the pin pile apparatus and the momentum from step (a) until the clump weight reaches the sea bed; (c) disconnecting the clump weight from the first pin pile; and (d) recovering the clump weight for use with a second pin pile and repeating steps (a)-(c). In this way, the pin piles are easily installed from their descent to the seabed with the clump weight, which can then be removed and applied to the next pin pile in an easy and repeatable operation without requiring a suction apparatus or hammer or drill.
Abstract:
A riser installation having a flexible pipe (10) of the unbonded type. The pipe (10) is positioned vertically between, on the one hand, a mechanical connection (7′) at the top of the riser to a surface installation (3) and, on the other hand, a mechanical connection (6′, 6″, 6″″) at the bottom of the riser with the sea bed (5). Fluidic connections at the top and at the bottom connect the riser on the one hand to surface equipment and on the other hand to sea bed equipment (2). The bottom of the riser is at a depth of at least 1000 m where it experiences a maximum calculatable reverse end-cap effect F. Tensioning device (8) imposes at the bottom of the riser a reactive tension T greater than at least 50% or even 100% of the maximum calculatable reverse end-cap effect F developed at the bottom of the riser.
Abstract:
The disclosure provides a system and method for installing subsea equipment, such as a pipeline and equipment associated therewith in a target area, generally having restricted overhead access. An anchor can be installed in the seabed and can include one or more sheaves. 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 can be provided and is adapted to be directly or indirectly coupled across at least a portion of the target area to the pipeline. A transfer sling having a pull wire and an initiation wire can be coupled between the winch wire and pipeline to assist the winch wire pulling the pipeline into the target area and transferring a pipeline force from the sheave to the anchor independent of the sheave.
Abstract:
The disclosure provides a system and method for installing subsea equipment, such as a pipeline and equipment associated therewith in a target area, generally having restricted overhead access. An anchor can be installed in the seabed and can include one or more sheaves. 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 can be provided and is adapted to be directly or indirectly coupled across at least a portion of the target area to the pipeline. A transfer sling having a pull wire and an initiation wire can be coupled between the winch wire and pipeline to assist the winch wire pulling the pipeline into the target area and transferring a pipeline force from the sheave to the anchor independent of the sheave.
Abstract:
An anchoring method and device, for anchoring a pipeline to a seabed. The pipeline may extend from a well which is located on a seabed to a floating platform. Tension forces which are exerted on the pipeline by the platform are diverted into the seabed by the anchoring device.