OVERVIEW OF SBMS-500 SUBSEA MULTIPHASE PUMPING · PDF fileOVERVIEW OF SBMS-500 SUBSEA MULTIPHASE PUMPING SYSTEM Curtiss-Wright Electro-Mechanical Corporation Cheswick, PA 15024 724.275.5168

© 2004 Curtiss-Wright Electro-Mechanical Corporation. All Rights Reserved.

OVERVIEW OF SBMS-500 SUBSEA MULTIPHASE PUMPING

SYSTEMCurtiss-Wright Electro-Mechanical Corporation

Cheswick, PA 15024724.275.5168


Motor/Pump and Heat Exchanger


Motor/Pump System in Test Tank


Topside Components on Petrobras P-20

VFD (In Container) Master Control Station Oil Supply Unit


Motor/Pump Set Subsea Module

Motor Junction Box

EMD Canned Motor Series

8058

Heat Exchanger

Leistritz Multiphase

PumpAccumulators

Transition Housing

Subsea Bases

Pressurizer


SBMS-500 Deployed Configuration


SBMS-500 Features

• Leistritz Multiphase Pump– Model L4HK-330-65– Similar to Leistritz units

qualified at Texaco and Chevron

– 500 M 3 / hr– 95% GVF– Longer life bearings and seals– 1 to 120 bar suction pressure

• Motor Pump Transition Housing– Single fluid maintains system

pressure and temperature

• Series 8058 Canned Motor– Basic design in compliance

with > 1400 delivered units– Hydro-Dynamic Bearings– 1268 KW (1700 hp)– 3 Phase/4 Pole (1800 Synch)– Medium Voltage ; 6700 Volts– Variable Frequency: 20-60 Hz

• Heat Exchanger– Manifold Design for variable

heat load applications• Pressurizer

– Maintains positive pressure about suction

Subsea Set Designed for 1000M water depth


SBMS-500 Features

• Topside Components– Variable Frequency Drive

• Output Voltage; 6900 VAC• Output Frequency: 20-60 Hz• Integral with Subsea Control

– Oil Supply Unit• Provides clean fluid for long subsea set life

– Master Control System• Subsea Control Module (SCM)• Topside Computer Station tied to SCM, VFD,

OSU, & Platform


Leistritz SeriesL4HK-330-65 Pump


Subsea Module Design

5.8m(228 in)

3.7m(145 in)

4.0m

(157 in)

System Weight:50,800 kg(111,900 lbs)


Subsea Component Design

• Pressure Vessel Design– Internal Design Pressure 124 bar (1800psi)– External Pressure 103.4 bar (1500psi)– Designed to ASME Section VII, Div 2:


Subsea Component Design (Continued)

• Internal Flow Circuit Design– Transition Housing Reservoir– Two Primary Circuits Exist

• Motor internal flow Circuit-380 GPM– Motor bearings – Heat removal

• Pump Circuit– Rolling Element Bearings– Seals (Balanced Flow thru Lube Oil Manifold)

– Heat Exchanger Circuit



Internal Flow Schematic



• Motor Unit Assembly Design– Motor Electrical Design

• 4 Pole/3 Phase/60 Hz/6760VAC/1700HP/1268Kw• Motor Winding design is complete as discussed in the

Motor Electrical Test Section

– Motor Junction Box• Penetration thru Junction Box with Pressure Balanced

Dry Mate Connector• Sealed and welded box of 316 SST material, and welded

to the stator shell• Dielectric oil filled for insulation capability and heat

dissipation• Terminal glands thru the motor shell designed

for full subsea pressure capability



• Motor Unit Assembly Design (Continued)– Motor Mechanical Design

• Horizontal Mounted• Oil cooled Canned motor design• Stator shell designed for full internal and

external pressure to house the motor winding• External flange connects the stator to the

transition housing



• Oil Pressurization System Design– Maintains Nominal 50psi above Suction

Pressure across the seals– Assures clean oil seal lubrication– Movable bellows permits a rapid response

by the Lubrication oil to changes in pump suction



• Heat Exchanger Design– Seawater Design Temperature range 3.3° C 38°F

to 10.6° C (51° F)– Seawater Design Depth 400 to 1000m (1312 to

3280 ft)– Heresite P-413 phenolic/L-66X topcoat selected

to inhibit seawater and carbonate fouling– Coating significantly reduces the cathodic

protection anode weight– Pipe is 2 inch Sch 80 wound to 51 inch dia

by 51 inches tall


Instrumentation & System Control

Master Control System



• This system provides supervisory control and data logging for: – Oil Supply Unit– Variable Frequency Drive– Subsea Multiphase Pump

• The system communicates with and logs data from the:– Subsea Control Module– Input and Output Power meters mounted

in the VFD enclosure.



• The system as scoped by Petrobras consists of a Visual Display Unit (VDU) with serves as the principle man machine interface for the system

• The VDU communicates with an Allen Bradley PLC which is the central control system for the SBMS-500 project

• The software interface will be “InTouchTM” by Wonderware®

InTouchTM is a Registered Trademark of Wonderware®



• The PLC provides all of the data interface and control for the Oil Supply System

• The PLC communicates with the VFD over a MODBUS link. The VFD operates autonomously for motor control – Providing current limiting– Speed Change Ramp Rate– Volts/Hz control

• Start-up, Speed Change and Shut-down Signals Originate at the PLC



• The PLC interrogates the VFD for data logging and system status (availability information)

• The communication link allows the VDU to mimic the VFD input panel and permit remote programming of the VFD

Documents

OVERVIEW OF SBMS-500 SUBSEA MULTIPHASE PUMPING · PDF fileOVERVIEW OF SBMS-500 SUBSEA MULTIPHASE PUMPING SYSTEM Curtiss-Wright Electro-Mechanical Corporation Cheswick, PA 15024 724.275.5168