Reducing Weight and Investments

Oil and water in the gas stream can lead to damage of equipment and the environment. To separate liquids from gas, Santos relies on Sulzer’s advanced inline technology. The Australian oil and gas producer benefits from big savings in investment, space, and weight.


The Wortel gas field is located offshore East Java, Indonesia, in the Indian Ocean. It was discovered in 2006 and is operated by Santos, an Australian oil and gas producer. Since 2012, Santos has been producing gas predominantly from two wells that are drilled to a depth of over 2 000 meters.

Water and oil in the gas streams can lead to blockages and corrosion in the pipes, as well as damage to compressors and other downstream equipment. Moreover, oil in the water raises environmental concerns because this water is typically released into the environment. To separate the liquid from the gas stream, Santos requires special separation equipment. The oil and gas producer decided to use an inline separation system—the Twinline™ separator from ASCOM (acquired by Sulzer in 2014). With this advanced technology, Santos benefits from big savings in both investment and overall weight and space, which are very important to all offshore suppliers.

The inline separator was installed early 2012 on the platform. It has been operational since March 2012 and is performing well, with over 99% predicted efficiency. In operation, the flow rate of gas has been increased to 15% above the nominal design rate, and the operational results are excellent. Santos considers it a proven technology with high performance. The Twinline—one of several inline separators from ASCOM—makes compact offshore processing solutions feasible and achieves high separation efficiency. ASCOM expands the offering of the Chemtech division for gas-liquid, liquid-liquid, and gas-liquid-sand separation technologies.

Facts & Figures 


Reduction in weight from that of conventional separator technology. Compact technology is very suitable for mature facilities modification, especially on oil and gas rigs, where space and weight are critical parameters.

Stable operation still achieved at 15 % over the design capacity.

Efficiency achieved with two separation stages and minimum space (as compared with conventional separation technology).


Reduced investments from those for conventional separation technology. With compact processing technologies, oil and gas processing equipment can be vastly reduced in size and weight, resulting in reduced capital expenditures.

The plasma-cutting process is used to cut steel and other metals of different thicknesses. Sulzer’s new plasma-cutting equipment shows the company’s commitment to technology leadership.

ProLabNL, acquired by Sulzer in 2014, offers one of the world’s most advanced multiphase flow loops. It simulates real oil field conditions under high- or low-pressure conditions.

Sulzer is a leading provider of separation technologies. The company’s portfolio includes state-of-the-art products for distillation, absorption, stripping, evaporation, phase separation, liquid-liquid extraction, crystallization, and membrane separation.

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