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Netzsch launches multiphase progressing cavity pumps

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Hydrocarbon Engineering,

Netzsch Pumps North America and Netzsch Pumps & Systems has launched multiphase progressing cavity pumps for mid and downstream pumping applications in the oil and gas market.

These pumps are specifically built for conveyance of oils with fluctuating, high contents of other substances without the need for separators at every borehole.

The multiphase pumps are capable of handling mixtures of oil, water and gas along with sand content, and can achieve flow rates of up to 600 m³/h. The pumps are also capable of conveying highly viscous oils at above 50 000 mPas while maintaining stable pressure and while exerting hardly any pulsation or shear forces. In doing so, the pumps avoid emulsion effects with oil-water mixtures, enabling complex media to be transferred over long distances to collection points without adverse effects to the subsequent separation of these mixtures at the surface.

The pumps’ high pressures and conveyance speeds without pulsation or shear are achieved through the progressing cavity pump's characteristic conveyance principle, wherein a rotor turns in an oscillating motion within a fixed stator. The geometrical mating creates chambers between the rotor and the stator. As the rotor turns in the stator, the medium advances from the inlet to the discharge side in these chambers.

The pumps can handle extreme environmental conditions, and have been successfully implemented in in South Sudan and the Kazakh steppe, among other sites. In addition to the multiphase application, the pumps can be used for long-distance transport of purified oil, injecting lubricants, injecting auxiliary substances in secondary and tertiary extraction, emptying tanks or oil sumps, and as transfer pumps with a volumetric accuracy of ±1%.

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