Multiphase pumps got their name due to the ability to pump simultaneously different aggregate states (phases) of matter.

A single–screw pump is a volumetric, screw machine consisting of:

• frames;
• drive;
• spindle with seal assembly;
• pumping section;
• connection node.

The  HESP consists of a horizontal electric submersible pump, mounted on a metal frame, mounted with an asynchronous explosion-proof electric motor, a clutch, a receiving chamber, and an unloading thrust assembly. Depending on the configuration, the HESP may additionally include a cooling system, flexible inlet and outlet hoses, pipe strapping with a filtration system and check valves.

Geometry and principle of operation.

The rotor teeth with the stator teeth form a set of sealed chambers, which, when the rotor rotates, move axially and thus pump liquid.

The single-screw multiphase pump allows:

• pump gas-liquid mixtures with a gas content of up to 80% without pulsation and emulsification. The efficiency of installations for pumping water-gas-oil mixtures is 65-70 %;
• to pump all well products (oil, water, associated gas) directly to the UPPN bypassing the DNS;
• to reduce capital and current costs, extinguish the flaring of associated petroleum gas and use it for technological purposes at the UPP;
• reduce the pressure at the wellheads, increase oil extraction and reduce the stress of submersible pumps.;
• pumping viscous oils without preheating;
• to pump oil with a high content of fur. impurities (up to 1%);
• to pump water and water-gas mixtures into the reservoir pressure maintenance system in targeted injection systems into injection wells with high efficiency.

Application options for single-screw multiphase pumps in the oil field.

Testing of screw pumps

Main parameters and dimensions of single-screw multiphase pumping units

New multiphase pumping unit

Single-screw multiphase pumping unit gas protection module

It allows to maintain the operation of multiphase pumping units with a volumetric gas factor in a mixture of more than 80%.

Semi-submersible pump for pumping oil-containing effluents from barns