Multiphase boosting in oil and gas production may typically be characterized by: 1. Slug flow occurrence possible, and 2. GVF at inlet conditions higher than 50 %. The physical challenge for the equipment in use is the strong variation of the GVF (Gas Void Fraction), leading to transient flow conditions at the pump's inlet. However, when the GVF during the entire operations constantly exceeds 98 %, control of heat generation becomes a further challenge. Suitable answers need to be found for questions like the following: 1. How can wet gas compression best be described? 2. Is this an efficient way to compress wet gas? 3. What about installation economics? A technical issue for wet gas compression is the shaft sealing. Available standard seals can either cope with liquid or gas, but not with varying fractions of both. Other limiting factors are differential pressure, lubrication characteristics of pumped liquids, solids, and circumferential velocity.
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