AutoZIP VIV Mechanism Fastener Vortex induced Vibration (VIV) is extremely destructive to subsea risers and moorings. FASTORQ’s AutoZIP VIV Mechanism Fasteners provide rugged, permanent and irreversible fastening of VIV suppression system fairings on subsea risers.
These fastening mechanisms are used in the same ways as their traditional counterparts, but with the added flexibility of speedy installation and removal, and in some cases, even added strength. One such strength benefit is in high-pressure connections, where the pressure actually works with the connector to make it more secure.
Another big advantage ZipNuts have over traditional threaded fasteners is their ability to work in spite of problems like rust, paint and damage that would normally prevent traditional connections from being made.
ZipNuts also come in a Double Zip® option that slides onto the nut in the same manner as the original, but give users the option to also remove the nut the same way with one quick turn and slide off the bolt. It doesn’t get much easier than that!
The Robotic Solution Vortex Induced Vibration (VIV ) occurs when ocean currents flow past the risers that transport well fluids from the sea bottom to the surface/offshore production structures. The vibration is extremely destructive to risers and associated equipment. To counteract VIV, suppression fairings are fastened around the risers. This fastening task is usually carried out with tooling that is mounted on an ROV. One of the challenges encountered is fastening the fairings to the risers once they are in place. To accomplish this, the fastener must: a) lend itself to robotic installation using an ROV and its tooling capabilites. b) allow free movement of the fairing so it can re-orient itself to the ocean currents. c) not loosen under unpredictable natural forces. d) stay secure for at least 30 years. Standard threaded fasteners DO NOT meet these criteria.
The Solution - The Fastorq ZipNut Fastening Mechanism The FASTORQ ZipNut Fastening Mechanism follows the same principle of a check valve by allowing movement only in one direction. The design solution incorporates a female fastener with segmented threads which separate slightly to allow entry and engagement of the male fastener as it is pushed into the female segment. No rotation is required!
The Fastorq Zip-Nut Fastening Mechanism is: a) compatibility with ROV tooling capabilities. b) rugged enough to withstand vibration and rotational stresses. c) made of material that is corrosion-resistant for 30 years.