摘要:
A partial helical strake system and method for suppressing vortex-induced-vibration of a substantially cylindrical marine element, the strake system having a base connected to the cylindrical marine element and an array of helical strakes projecting from the base for about half or less of the circumference of the cylindrical marine element.
摘要:
There is disclosed a system for reducing drag and/or vortex induced vibration of a structure, the system comprising a fairing comprising a dampening mechanism adapted to dampen the rotation of the fairing about the structure.
摘要:
Methods for remotely installing vortex-induced vibration (VIV) reduction and drag reduction devices on elongated structures in flowing fluid environments. The devices installed can include clamshell-shaped strakes, shrouds, fairings, sleeves and flotation modules.
摘要:
A system comprising a subsea structure defining an interior of the system, the structure subject to a water current; a sleeve exterior to the subsea structure, covering at least a portion of an outside surface of the subsea structure; and a vortex induced vibration suppression device exterior to the sleeve.
摘要:
There is disclosed a current tank system comprising a first current tank adapted to produce a first current in a first direction; a second current tank adapted to rotate to produce a second current in a second direction; a sample adapted to be exposed to the first current and the second current.
摘要:
Apparatus for suppressing vortex induced vibrations on a marine element of a riser system wherein the riser system comprises at least one umbilical element. Systems comprising and methods of using said apparatus to suppress vortex induced vibrations. The apparatus, systems, and methods comprise module elements which provide: i) a surface around a marine element for installing VIV suppression devices; and ii) passages for housing the at least one umbilical element.
摘要:
A spar platform is disclosed having a deck, a buoyant tank assembly supporting the deck, and a counterweight. A counterweight spacing structure connects the counterweight to the buoyant tank assembly. The buoyant tank assembly has a first buoyant section connected to the deck and a second buoyant section disposed beneath and axially vertically aligned with the first buoyant section. The second buoyant section has a substatially larger diameter than the first buoyant section and a buoyant section spacing structure connects the first and second buoyant sections in a manner providing a horizontally extending vertical gap therebetween. Another aspect of the invention is a method for reducing VIV in spar platform by providing a substantially open horizontally extending vertical gap in the cylindrical buoyant tank assembly between a first buoyant section and a second buoyant section. The first and second buoyant sections are vertically aligned and are selected to combine first and second buoyant sections of substantially different diameters.
摘要:
There is disclosed a system comprising a structural element, at least one helical strake about the structural element, and at least one ramp to provide a transition from the structural element to the helical strake.
摘要:
Apparatus and methods for remotely installing vortex-induced vibration (VIV) reduction and drag reduction devices on elongated structures in flowing fluid environments. The apparatus is a tool for transporting and installing the devices. The devices installed can include clamshell-shaped strakes, shrouds, fairings, sleeves and flotation modules.
摘要:
The present invention is a spar platform having a deck supported by a buoyant tank assembly having a first buoyant section connected to the deck, a second buoyant section disposed beneath the first buoyant section; and a buoyant section spacing structure connecting the first and second buoyant sections in manner providing a horizontally extending vertical gap therebetween. A counterweight is connected to the buoyant tank assembly through a counterweight spacing structure.