1. Electrical Submersible PumpElectrical Submersible Pump
(ESP)(ESP)
Presented byPresented by
Win Nyunt AungWin Nyunt Aung

2. ESPESP
oror
Dynamic displacement PumpDynamic displacement Pump
• Turn a staged series of centrifugal pump andTurn a staged series of centrifugal pump and
• To increase the pressure of the well fluid andTo increase the pressure of the well fluid and
push it to the surface.push it to the surface.

3. Component parts of ESPComponent parts of ESP
ESP assembly consists of:ESP assembly consists of:
• Subsurface electric motorSubsurface electric motor
• Seal section (protector)Seal section (protector)
• Multi-staged centrifugal pumpMulti-staged centrifugal pump
• Electric cableElectric cable

4. Electric MotorElectric Motor
Electric motor used in ESP operations areElectric motor used in ESP operations are
designed:designed:
• Two poles, three-phase & induction type.Two poles, three-phase & induction type.
• Typically operated at 2900 rpm on 50 HzTypically operated at 2900 rpm on 50 Hz
(or 3500 rpm on 60 Hz).(or 3500 rpm on 60 Hz).
• Amperage requirement may be from 20 to 120A.Amperage requirement may be from 20 to 120A.
• Operating voltage range from 230V to 5000V.Operating voltage range from 230V to 5000V.

5. Electric Motor
Connector to
power system
Housing
Rotor
Rotor Bearing

6. Seal section (protector)Seal section (protector)
It performs basic functions as:It performs basic functions as:
• Provide a tight connection between the motorProvide a tight connection between the motor
and pump by drive shaft of motor to pump shaft.and pump by drive shaft of motor to pump shaft.
• Sealing and pressure equalizing between motorSealing and pressure equalizing between motor
oil and wellbore fluid.oil and wellbore fluid.

7. Seal section
or
Protector
Connect to motor
Seal assembly
Housing thrust
bearing
Housing
Bellow type equalizer

8. Centrifugal Pump with intake sectionCentrifugal Pump with intake section
• Stage is important function and need to select.Stage is important function and need to select.
• Stages can be used allow up to several hundred.Stages can be used allow up to several hundred.
• Each stage consists of :Each stage consists of :
-- impellerimpeller (supplies energy of fluid to be pumped)(supplies energy of fluid to be pumped)
-- diffuserdiffuser (transforms the kinetic energy into(transforms the kinetic energy into
pressure energy before sending to impeller)pressure energy before sending to impeller)

9. Centrifugal Pump
Rotor shaft
Impeller
Diffuser
Housing

10. Cable & selectionCable & selection
• Round cableRound cable
Polynitrile / polythylene with copper or aluminumPolynitrile / polythylene with copper or aluminum
conductor, galvanized armor.conductor, galvanized armor.
• Flat cableFlat cable
Polynitrile with copper conductor, galvanizedPolynitrile with copper conductor, galvanized
armorarmor
Selection of cable type / size is primarily basedSelection of cable type / size is primarily based
on fluid conditions, BHT and space limitationson fluid conditions, BHT and space limitations
within the casing size.within the casing size.

11. Electric Cable
Components

12. Subsurface assembly of ESPSubsurface assembly of ESP

14. Surface Control panelSurface Control panel
ESP Control Penal
Ground Rod
Connection
from
transformer
Connection to junction box

15. Pump selection:Pump selection:
1. Assume1. Assume desired volumetric flow ratedesired volumetric flow rate , determine, determine PPwfwf
from IPR relationship.from IPR relationship.
2. Calculate minimum2. Calculate minimum pump depthpump depth and pumpand pump intakeintake
pressurepressure based onbased on PPwfwf ..
3. Determine required3. Determine required pump dischargepump discharge pressure frompressure from
the pressure traverse calculation.the pressure traverse calculation.
4. Determine dynamic head (4. Determine dynamic head (∆P∆P)) for flow in tubing.for flow in tubing.
5. Calculate the5. Calculate the heightheight of produced fluid usingof produced fluid using ∆P.∆P.
6. Determine number of stages(6. Determine number of stages(NNss ) by fluid height.) by fluid height.
7. Finally, determine required horsepower for selected7. Finally, determine required horsepower for selected
pump can be read from characteristic chart bypump can be read from characteristic chart by NNss

16. SUMMARYSUMMARY
Advantages:Advantages:
• Can produce very high volumeCan produce very high volume
of fluidof fluid
• More efficient inMore efficient in deeper welldeeper well
than s/rod pumps.than s/rod pumps.
• Able to handle some free gasAble to handle some free gas
in the pumped fluid.in the pumped fluid.
• May cause good movableMay cause good movable
action in producing zones.action in producing zones.
• Can operate at highCan operate at high
temperature and hightemperature and high
pressure.pressure.
Disadvantages:Disadvantages:
• Severely to get in sand fallingSeverely to get in sand falling
problemproblem
• Can cause pump componentsCan cause pump components
wear and tear due to sand andwear and tear due to sand and
fine particle.fine particle.
• High voltage requirement.High voltage requirement.
• Handle with care during RIHHandle with care during RIH
and POOH operationsand POOH operations

17. References:References:
1.1. API RP 11R(1986) / 11S3(1999) Electric Submersible PumpAPI RP 11R(1986) / 11S3(1999) Electric Submersible Pump
Installation, 2Installation, 2ndnd
edition.edition.
2.2. API RP 11S(1986) Operation, Maintenance & Troubleshooting ofAPI RP 11S(1986) Operation, Maintenance & Troubleshooting of
ESP Installation, 2ESP Installation, 2ndnd
edition.edition.
3.3. Henri CHOLET (2000) Well Production Practical Handbook.Henri CHOLET (2000) Well Production Practical Handbook.
4.4. Denis Perrin (1999) Oil & Gas Field Development Techniques.Denis Perrin (1999) Oil & Gas Field Development Techniques.
5.5. Michael J. Economides / A. Daniel Hill (1994) PetroleumMichael J. Economides / A. Daniel Hill (1994) Petroleum
Production System.Production System.