A vortex-induced vibration (VIV) suppression apparatus comprising: a strake having a cylindrical body portion dimensioned to encircle an underlying tubular, a fin portion extending radially outward from the body portion and helically positioned around the body portion, and a gap formed through the body portion and the fin; and a connecting assembly configured to facilitate attachment of the strake to an underlying tubular.

A vortex-induced vibration (VIV) suppression apparatus comprising: a strake having a cylindrical body portion dimensioned to encircle an underlying tubular, a fin portion extending radially outward from the body portion and helically positioned around the body portion, and a gap formed through the body portion and the fin; and a connecting assembly configured to facilitate attachment of the strake to an underlying tubular.

An innovative hexagonet provides a unique surface structure to achieve optimal tribological performance of any solid objects. The hexagonet comprises fractal hexagons and each fractal hexagon include regular hexagons in fractal form that can reduce friction and improve interactions of an object with any other objects and environment, thereby increasing the performance and reliability of the object by increasing balance and consistency in motion and at rest. Once integrated to the object, the hexagonet can form a protective surface which is repellent to other matter, thus, providing slippery, anti-fouling and anti-bacterial properties. Additionally, the protective surface creates a tribological effect which significantly reduces heat and disturbance, contamination and wear and tear resulting in reduction of energy consumption of the object. Further, the versatile and effective hexagonet can provide various applications to the object in solid-to-solid, solid-to-liquid, solid-to-air interactions, etc.

An innovative hexagonet provides a unique surface structure to achieve optimal tribological performance of any solid objects. The hexagonet comprises fractal hexagons and each fractal hexagon include regular hexagons in fractal form that can reduce friction and improve interactions of an object with any other objects and environment, thereby increasing the performance and reliability of the object by increasing balance and consistency in motion and at rest. Once integrated to the object, the hexagonet can form a protective surface which is repellent to other matter, thus, providing slippery, anti-fouling and anti-bacterial properties. Additionally, the protective surface creates a tribological effect which significantly reduces heat and disturbance, contamination and wear and tear resulting in reduction of energy consumption of the object. Further, the versatile and effective hexagonet can provide various applications to the object in solid-to-solid, solid-to-liquid, solid-to-air interactions, etc.

A helical strake pole system that includes a tubular pole having a longitudinal axis and threaded attachment points. The system further includes a helical strake fin disposed circumferentially around a portion of the tubular pole along the longitudinal axis. The system further includes couplers disposed on the tubular pole. The couplers are configured such that each coupler has a first portion with a slot configured to receive an upper portion of the helical strake fin and a second portion configured to removably coupled to a threaded attachment point of the tubular pole. In addition, each coupler is configured to position a portion of the helical strake fin substantially perpendicular to a surface of the tubular pole.

A helical strake pole system that includes a tubular pole having a longitudinal axis and threaded attachment points. The system further includes a helical strake fin disposed circumferentially around a portion of the tubular pole along the longitudinal axis. The system further includes couplers disposed on the tubular pole. The couplers are configured such that each coupler has a first portion with a slot configured to receive an upper portion of the helical strake fin and a second portion configured to removably coupled to a threaded attachment point of the tubular pole. In addition, each coupler is configured to position a portion of the helical strake fin substantially perpendicular to a surface of the tubular pole.

A bullhead-shaped grooved diversion jet and empennage swing vibration suppression device and method. The device consists of an impeller diversion module and a drainage rotary cover module. The impeller diversion module consists of a center impeller, sleeve bearings, small impellers, and small impeller rotating shafts. The drainage rotary cover module consists of a drainage front cover, a perforated jet rear cover, and empennages. The device is mounted on an outer wall of a riser in a sleeving manner. Under a combined action of drainage and space allocation of horizontal rectangular grooves, flow rate distribution of the center impeller, flow direction adjustment of the small impellers, diversion of lateral diversion holes, jet flows of side rear reducing holes, flowing space division and wake vortex turbulence of rotary swinging empennages, around-flow boundary layers at two sides and a tail of the riser are deeply damaged, which suppresses the formation of large vortexes.

A fairing device for the reduction of vortex-induced vibrations or motions and the minimization of drag about a substantially cylindrical element immersed in a fluid medium, comprising; a cylindrical element, a fairing rotatably mounted about the cylindrical element, the fairing comprising a shell with a cylindrical cross-sectional shape with an outer diameter (D) following the outer diameter of the cylindrical element from an upward stagnation point of 0 degrees to at least +/−90 degrees, and which at +/−90 degrees continues as two fin-like portions in an aft direction and defining a chord length (C), further comprising that the fin-like portions are convexly curved aft of +/−90 degrees thus tapering towards each other and defining a tail end opening or gap less than the fairing standoff height.

A fairing device for the reduction of vortex-induced vibrations or motions and the minimization of drag about a substantially cylindrical element immersed in a fluid medium, comprising; a cylindrical element, a fairing rotatably mounted about the cylindrical element, the fairing comprising a shell with a cylindrical cross-sectional shape with an outer diameter (D) following the outer diameter of the cylindrical element from an upward stagnation point of 0 degrees to at least +/−90 degrees, and which at +/−90 degrees continues as two fin-like portions in an aft direction and defining a chord length (C), further comprising that the fin-like portions are convexly curved aft of +/−90 degrees thus tapering towards each other and defining a tail end opening or gap less than the fairing standoff height.

A flow deflector arrangement is used in combination with a pipe arrangement secured through a component, the flow deflector arrangement comprising: a nut to secure the pipe arrangement to the component, and a shroud for attachment to the component so as to extend at least partially around the pipe arrangement when the pipe arrangement is secured to the component by the nut. The nut has an outwardly directed flange to adopt a position spaced from the component, and the shroud defines at least one deflector surface which, when the shroud is attached to the component, extends away from the component in spaced relation to the pipe arrangement. The flange and the deflector surface cooperate in deflecting a flow of fluid flowing from the component and along the outside of the pipe arrangement such that the flow is deflected generally outwardly from the pipe arrangement with a degree of swirl.