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Multiphase pump stations

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

Pumps code

Length, width, height, mm

Weight, kg

Pressure max., MPа

Flow rate, м3/hour

el. power, кW

У3НВ1-105.2.12.025

5700, 800, 620

1000

12

2

18,5

У1НВ3-110.3.04.155

4200, 800, 620

900

4

10

18,5

У3НВ1-120.3.12.090

8200, 950, 900

1600

12

7

45

У1НВ3-180.2.04.280

6500, 950, 870

2200

4

20

45

У1НВ1-195.3.04.380

6500, 950, 870

2200

4

30

45

У1НВ1-200.6.04.1000

6900, 1200, 950

2900

4

50

90

У1НВ1-205.4.02.1200

7260, 1150, 930

3060

2

60

75, 110

New multiphase pumping unit

Pumps code

Length, width, height, mm

Weight, kg

Pressure max., MPа

Flow rate, м3/hour

el. power, кW

У1НВ1-240.4.04.1500

9950, 800, 1060

4700

4

90

110

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

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