Neptune Oceanographics Limited products

Neptune`s fluorescent leak detection system is based around a family of submersible long-range fluorometers. The sensors respond to a range of fluorescent leak detection dyes and liquid hydrocarbons at low concentrations. The advantage of Neptune`s fluorescence detector system is the ability to detect very low concentrations in turbid conditions with a high spatial coverage using the new family of long range remote sensing fluorometers.

Ultrasonic leak detection is a method of pipeline leak detection that uses a directional hydrophone that `listens` for ultrasounds generated by leaking fluids passing through an orifice under pressure. The acoustic signals generated by a leak tend to be at frequencies above 30kHz. The software uses techniques that determine the difference between leak generated sound and lower frequency noise such as that caused by the attendant ROV and surface vessels.

Under some circumstances such as with water injection flow lines and high pressure control systems, leaks can be identified using temperature detection of the difference between the surrounding seawater and the water leaking from the flowline. The flowline water temperature is normally above ambient seawater temperature due to the high pressure pumping required. Neptune Oceanographics has developed a differential temperature technique that can detect very small temperature changes. The thermal leak detector comprises a fast, high precision thermistor connected through the Neptune Oceanographics leak detection system to the ROV umbilical for onboard display and recording.

For the offshore oil and gas industry, hydrocarbons fall loosely into three areas: oil, gas and mixtures of both (multi-phase) and therefore the method used for hydrocarbon leak detection will depend on which of the three is prevalent.

For detection of subsea methane leakage, Neptune’s SNIFFIT is deployed. Fluorescence is not possible for detection of methane in water.