Deoiling

Deoiling is a very common operation and is typically performed during change of service, maintenance and inspection or decommissioning. In all cases the level of cleanliness is critical to prevent contamination of the aquatic environment.

A commonly required level of cleanliness is 30ppm Oil in Water. This is a necessarily strict target and can be difficult, time consuming and expensive to obtain, especially when operating from a vessel with very high daily rental costs.

To make matters more difficult, especially during decommissioning when the pipeline may have undergone many changes during its life time, the pipeline may have different diameters along its length making it unpiggable. In addition access to the pipelines may only be possible through a narrow downline from a vessel.

SANCCUS SOLUTIONS

Sanccus has a unique blend of inhouse experience in both pipeline gel and chemical cleaning chemistry and processes which we combine into a system based approach to provide the most effective deoiling solutions available. These have been extensively proven in the UK and Norwegian sectors of the North Sea and can achieve the 30ppm target with less than two line volumes of seawater and often with less than one single line volume. Oil in water readings of <5ppm are common using our systems.

Our chemical systems can be used with conventional pigs however when operating via narrow vessel downlines mechanical pigging is not an option so our combined gel and chemical cleaning chemical trains are especially effective with the whole chemical train able to safely pass through production separators at the end of the process. Since the costs for dive support vessels is often very high and chargeable on a daily basis, our combined gel and chemical train can save all parties valuable time and money per job by quickly and reliably hitting the required cleanliness targets without causing any process system upset or interruption.

PRODUCT INFORMATION

Pipelines Range

Gel technology is very versatile and can be applied anytime during the lifetime of a field from helping to remove hydrotest fluids when commissioning to the bulk removal of hydrocarbons and solids prior to maintenance or when preparing a pipeline for responsible decommissioning.

Aqualink Gel

Aqualink Gel is an environmentally friendly crosslinked pipeline gel - great all rounder with self-healing ability. On the completion of a job, Aqualink Gel can be chemically broken down and be ejected directly to the sea as long as there is no liquid hydrocarbon contamination.

Petrolink Gel

Petrolink Gel is an oil based crosslinked pipeline and fracturing gel. It is typically used in pipelines where the presence of water is undesirable due to the risk of hydrate formation or corrosion.

Solclean Gel

SolClean Gel is a pipeline gel specifically designed to clean oil and other hydrocarbons from pipe walls leaving them water wet. It is especially useful during maintenance or decommissioning where strictly low oil in water targets are expected.

Aquasurf Gel

AquaSurf Gel is a non-crosslinked water-based gel containing deoiling surfactants. Aquasurf Gel is an excellent combination product for deoiling pipelines where the oil in water requirement is less stringent and avoids having to pump several chemicals in sequence.

M-Gel Pig

M-Gel Pig is a highly flexible gel pig with shape memory used in situations where a mechanical pig cannot be applied. It is capable of extruding through chokes and restrictions up to 50% of its diameter and returning undamaged to its original size and shape once through.

Hyper Gel Pig

Hyper Gel Pig is a highly flexible gel pig with shape memory which is specifically designed for use in environments of extreme temperature. This means that Hyper Gel Pig can be applied under extreme pipe conditions and can also be stored in very hot or very cold climates without damage.

Atlas Pig

Atlas Pig is a highly flexible gel pig with shape memory used in situations where a mechanical pig cannot be applied. It is also capable of withstanding pressures up to 600 barg for up to 72 hours. This allows Atlas Pig to be installed during pre-commissioning.

Mono Gel Pig

Mono Gel Pig is a pipeline pig made from a mixture of gelled monoethylene glycol and water. Having a melting point of around 30°C it is typically used in colder climates and as with all gel pigs it is used in situations where a mechanical pig cannot be.

Hydro Gel Pig

Hydro Gel Pig is a pipeline pig made from a mixture of gelatine and water. Having a melting point of around 25°C it is typically used in colder climates and as with all gel pigs it is used in situations where a mechanical pig cannot be.