Surface Component English

7/28/2019 Surface Component English

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Schlumberger REDA Production Systems XPERT ESP

SURFACE

EQUIPMENT

ESP Component



SURFACE COMPONENT

- Transformer

- Switch Board

- Junction box

- Well Head or tubing head

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SURFACE EQUIPMENT

Shown here is the surface related equipment required for

most down-hole electrical submergible pump systems.

Transformer Motor speedcontroller

Junction Box Well Head

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SURFACE EQUIPMENT

Transformer

• Provides required voltage for down hole motor

• Works by transforming the voltage through induction magnetic field

• In general, 3 types of transformer :

- Single phase transformer

- Three phases transformer

- Auto transformer

• 4 Main construction parts :

- Core (lamination body)- Primary winding

- Secondary winding

- Enclosure

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SURFACE EQUIPMENT

Transformer

The transformer sends the correct

voltage to the Switchboard for designed

surface voltage for the proper motor

operation.

This is based on power rating in KVA.

Transformers can be either single phase

or three phase.

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SURFACE EQUIPMENT

Transformer Normally when using single phase transformers

for three phase power, three individual

transformers are connected together, in various

configurations.

A single phase transformer

generally appears similar to

the figure shown.

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ESP



SURFACE EQUIPMENT

CORE

WINDING

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ESP



SURFACE EQUIPMENT

V1 = T1 -------> 600 = 10 ----->

V2 T2 V2 2

600 VOLTS (10 TURNS)120 VOLTS (2 TURNS)

120 VOLTS

V2V2

V2 = 600 X 2 =

10

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ESP



SURFACE EQUIPMENT

DETERMINE TRANSFORMER’S KVA

Sample : Motor 180 HP/ 1000 V/ 103 Amp

PSD 3000 Ft, SBHT = 200°F

Cable AWG -1, length 3100 Ft.

Voltage drop (from chart) = 24 Volts/ 1000 Ft

Total Volt drop = 24 x {(3100+100) / 1000)} =76.8 Volts

Required surface voltage = 1000 + 76.8 = 1076.8 VoltsKVA = (Surface Volt x Amps x 1.732) / 1000

= (1076.8 x 103 x 1.732) / 1000

= 192.1 KVA ----------> Choose 200 KVA (Minimum)

103

24 AWG #1

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ESP



• TRANSFORMER

- Variable input Voltage 7200 V - 13000 V

- High voltage required in the transmission to get lower

Amperage, in order to allow smaller size cable

- Input voltage decreased by a step down transformer to

meet required motor voltage

SURFACE EQUIPMENT XPERT

ESP



• Switch Board - Control panel for electric motor

- Equipped with motor controller

• Monitors overload / under load problems

• Can be set to auto restart in the case of intermittent well

• Detects voltage unbalance

- Equipped with Amp chart to record motor performance


ESP




ESP

Reda Switchboard

• Ratings

• DFH2 600 Volt

• MFH 1000 Volt• MDFH 1500 Volt

• AB 1512 3900 Volt*

* Available to 5000V by changing P.T.




ESP

Switchboard

• Ratings:

– Maximum Voltage

– Maximum Amp Load – Maximum KVA




ESPSwitchboard

Selecting a Switchboard

• Select a Switchboard with the appropriate

Volt, Amp and KVA rating

• Select a motor controller type and feature

• Select a wiring harness for the motor controller.



• Switch Boards

FOUR MAIN COMPONENTS

• MAIN BREAKER

To connect high voltage from the transformer to the down hole motor

• POTENTIAL TRANSFORMER (PT)

To reduce the high voltage to 120 Volts, for use by the control systems in the

switch board - and to hold magnetic field in the Vacuum contactor

• CURRENT TRANSFORMER (CT)

Reduce high amperage in the circuit to 5 amps for ease of measurements

• VACUUM CONTACTOR

Function is to absorb spark that possibly occur in the contactor system

during start and stop switching operations.


ESP



SURFACE EQUIPMENT

SWITCH BOARD

• 3 MAIN FUNCTIONS

- Motor starter unit

- Protective equipment for overload and under load problems

- Recording Instruments

• SWITCH BOARD CONTENT

- Manual Switch breaker

- Motor controller

- Gas locking protector

- Restart relays for intermittent well

- Ampere chart mechanic

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ESP



SURFACE EQUIPMENT

Potential Transformers

Installed in the switchboard

Used to step-down the high voltage to a control voltage of 120 volts

(no load).

The 120 volts is used to run all the control circuits in the Switchboard.

Motor controllers will monitor the control voltage; and using the P.T.

ratio calculate the line voltage in the switchboard.

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ESP




ESPPotential Transformers

• Transformer Rating 1430/126

Calculate the Ratio 1430 = 11.35

• Measured secondary Voltage = 119V

119V X 11.35 = 1350V on the primary

126




ESP

Current Transformers

Another type of transformer which is used

in the motor controller is the “CurrentTransformer". (CT)

This type of transformer changes one

current to a different current.




ESPCurrent Transformers

As an example, if 180A is flowing through the conductor, sothe TR is 200:5, the amperage on the secondary side of theCT will be:

Sec. Amps =

180

(200:5) = 4.5 A 180A

4.5 A

Sec. Amps =180

200x 5 = 4.5 A

or





CT also transforms the motor amperage at the

primary side, to 5 amps (maximum) at secondary

side, in order to be able to record the current on

the amp chart.

However motor amps display are best at the

middle of the range between 0 – 5, to give space

for overload and under load problems recorded




ESP

Motor running amps

0

5 Amps






A conductor passes through the winding of the CT andenergizes the CT. Typically the CT ranges used in theSPS controllers have a ratio of 200:5, 300:5, 150:5,75:5 etc.

Primary side

Secondary side





Given example: Available single tap CT 300:5 ratio. Motor load: 85 Amps.

CT set up: 85 x 1.6 = 136. --- CT ratio 150 : 5

Working Amperage at amps chart control :

(85/150) x 5 = 2.8 A

Available CT 300 : 5 (85/300) x 5 = 1.42 A.




ESP


CT ratio 150 : 5 CT ratio 300 : 5

Solution : Make two turns of wire



If one pass of the wire results is greater than 5A, the CT ratiomust be increased by going to a CT with a higher turns ratio.

Control Circuit amperage can also be increased by two by

looping the wire for two passes; or by three with three passes.



ESP





Sizing CT’s

Amps through S.B. X 1.6 = CT primary size

e.g. 59 A X1.6 = 94 Amps

100:5 CT = 20:1

59/20 = 2.95 Amps Secondary Current

Motor Controllers work best between 2.5 -3.5 Amps



SURFACE EQUIPMENT

JUNCTION BOX

FUNCTION:

• Ventilation for gas that possibly

comes up to surface through thecable

• Connection terminals, easier to

reverse motor rotation and to take

initial readings.

JUNCTION BOX

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ESP

XPERTSURFACE EQUIPMENT



Wellhead

The Wellhead is the equipment

that is installed at the surface of

the well bore.

It’s purpose is: to suspend thetubing string in the well, and to

monitor and control high

pressures conditions often

present within the well.

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ESP

SURFACE EQUIPMENT



FROM

JUNCTION

BOX

ATTACHABLE

CONNETOR

(ASSEMBLY)

PENETRATOR

SURFACE

POWER PLUG

STRAPPED

CABLE BAND

PICK UP TUBING

TUBING HANGER

PAU/ XPERT ESP/ IWS

PRODUCTION TUBING

WELL HEAD

CONNECTOR

ASSEMBLY

XPERT

ESPSURFACE EQUIPMENT

O RING

IWS- XpertESP 2002



PAU/ XPERT ESP/ IWS

GLAND NUT

POWER CABLE

FROM JBOX

RUBBER SEAL METALSPLIT

RING

WELL HEAD

PACK OFF

ASSEMBLY

XPERT

ESPSURFACE EQUIPMENT

O RING

IWS XpertESP 2002

Surface Component English

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