Subsea Boosting SMPCneu

Subsea Multiphase Pump Compressor - SMPC

The Bornemann Subsea booster (SMPC) is the consequent further development of the subea Multiphase Pumps and the heavy duty topside Multiphase Pump type MPC.

The new Double-Pressure-Compensated (DPC) pump design provides the basis for the new Subsea Multiphase Pumps.
It basically consists of two main components:

  • The pressure casing, rated for water depths and process pressure
  • The pump-motor-module, including all rotating equipment


Technical Data

Oil, Multiphase and Wet Gas
 from 1 cSt up to 5000 cSt
350 – 500 – 1000 barg
Boost pressure
up to 50 bar – MP/WG
 (continuous operation)
 up to 150 bar
 Oil/MP (low GVF, downstream separator)
 up to 100 bar
 MP/WG (temporary)
 up to 200 bar
 Oil/MP (two stage concept)
from 100 kW up to 3500 kW
 (5 MW two stage MPP)
from 50m3/h to 2000 m3/h
5 years maintenance free operation
Water depth
up to 3000m


Performance Data

Frame Sizes:   6, 7, 8, 9,10
Excecution:     HSC (Hydraulic Speed Control)
                         HDP (High Differential Pressure Rotor)




 6 10-100100
 50 3000 5
 7 50-350 400 100 2500 15
 8 60-600 800 80 2200 25
 9 100-1000 2000 100 1800 50
 10 200-2000 3500 150 1500 80



The pump-motor-module is built up from the approved SMPC pump cartridge and a pressure compensated electrical motor cartridge. The pump/motor cartridge is integrated into a “separator style” pressure casing.

Typically power transmission from electrical motor to the pumping elements  will be achieved by installing a mechanical coupling. Optionally a hydraulic torque or speed converter can be integrated.
The cartridges – motor, coupling, pump bearings, timing-gear and seals are filled with pressurised lube oil. The pressure of the lube oil is permanently controlled and adjusted to provide best operating conditions to the mechanical seals. Consequently the casing of the pump-motor-cartridges is pressure compensated against the pump casing pressure.
The pump-motor-module will be inserted into the pressure casing by avoiding all sensitive interfaces between pressure casing and pump/motor cartridge. The only mechanical interface between pump/motor cartridge and pressure casing is the anchor point at the pump casing cover plate. Deflections, deformations, mechanical stress, etc. from the casing will not be transmitted to the pump-motor cartridge.

Due to the fact, that the pressure casing unloads the pump/motor cartridge from sea-water-pressure, and the lube oil pressure unloads the cartridge from process pressure the new SMPC design is Double Pressure Compensated (DPC).

While the pump/motor cartridge design is mainly standardised, the casing is designed according to the actual project requirements. Different materials can be used, coating from inside can be done, composite material might be applied.

The pressure casing is a geometrical simple “separator style” pressure vessel. Therefore it provides good separation and liquid hold up capabilities – required for reliable multiphase and wet gas operation.

The DPC design also allows the vertical installation of the MPP. The diameter of the pump can be minimized – still providing sufficient separation and liquid hold up volume for reliable multiphase-service.

Design Features

Division of tasks
casing takes only pressure load (1000 barg)
cartridge carries rotating components (10 bar)

Simplified internal interfaces

pump - motor - coupling - casing

Large liquid hold back volume (discharge)

for long gas periods

Most simple pressure casing design

coating and cladding possible

Vertical installation
minimized footprint

Hermetical sealed
no rotating seal to environment

Design lifetime 5 years

for mainenance free operation

Advantages for Users

  • Wide operating range
  • Not sensitive to changing operating parameters
  • Full self priming and gas handling capability up to 100% gas
  • High viscosities - up to 5000 cSt
  • High differential pressure - up to 150bar
  • High efficiency at high viscosity and gas
  • Extension of operating range by serial and parallel installation of SMPCs
  • Vertical design of new SMPC