Electrical Submersible Pump
.png)
Is an artifacial lift method where the subsurface pump will operate with an electric power transmited
"from surface to the subsurface via acable "power cable
Tubing Suspended
Is atubing suspended pump inside the casing and discharge through tubing
It consists of
Surface equipment
Transformer
"Switch board"motor controller
"Junction box "vent box
Surface cable"which transimitte the power from surface to subsurface
"Subsurface equipment"from bottom&up
Motor
"Protector"seal section
Pump intake
Subsurface pump
Check valve
Drain valve
power cable
Consist of two type
"Flat cable...."to prevent stuck
"Roller....."has higher resistance
يتم التوصيل بين two parts بواسطه Splice
Operating Mechanism
The avialable primary voltage is transmitted to
three single phase transformer to convert the high voltage to lower voltage
one-three phase transformer to convert low primary voltage to higher one
then the power passes through the switch board which allow the current to pass if its on ON position
then the current will pass through the surface cable ,vent box,well
head,and down in the well untile the motor
head,and down in the well untile the motor
the motor will rotate which allows the pump rotation because they are coupled with each other rotation of pump will discharge the produced fluid through the discharge head to fill up the tubing then start producing on the surface
check valve is located above the pump in order to
Keep the tubing full off during shutdown
Prevent the produced volum from falling back on the pump which may be cause rotation of the pump on the oppist direction which resulting in bearing failure
**********
Drain valve
Is used to get the tubing empty during pulling out of
(the hole( POH
(the hole( POH
located below the check valve
motor section the motor used with electrical submersible pump are
There phase
Self priming
Self lubricating
Const speed
Induction motor
Frequency 50 HZ
Speed 2415 R.P.M
the motor is full of arery high qualified lube oil which absorb the heat generated during motor rotation transfers it to the motor housing which should be cooled by the produced fluid
therefor the pump should be placed above the perforations
******************
seal section
![]()
The function of protector
Protection motor luble oil against the invasion by the formation fluid
Connect the pump housin with the motor housing through coubling the motor shaft with the bottom of the protector shaft&pump shaft with the top of the protector shaft
Used as areservoir for the motor luble oil resulting from expansion during motor rotation &provides luble oil to the motor during the
"motor shut down"cooling of the oil
Houses the thrust bearing of the pump
*********************************
pump intake
Is the pump inlet where the produced fluid enter into the pump
(in some cases (especially when the GOR is high
abottom hole gas separator is used to separate the gas and divert it int annulus
the gas separator is also used as apump intake
************************
subsurface pump
subsurface pump used as (self priming,multistage,centrifugal
( pump
It consists of more than one stage .each stage consist of arotating
"part called "impeller
"mounted on the shaft and stationary part called "diffuser
the production rate doesnt change from stage to another and mainly depend on the "shape,diameter
"of the impeller while the head depends on the NO of stage
***********************
vent(junction)box
Is used to vent any gases which may travel with the cable to reach the switch board in order to avoid hazard of explosion or fire
therfor,the vent box should be located 35 feet as minimum from switch board and 15 feet as minimum from the well head
*********************
cables
There are two type of cable
round
flat
"The joint between them called"splice
each cable contains 3 conductor made of cupper or aluminium
each conductor is surrounded by an isulation made of rubber&plastics followed by jacket which protected by an armor made of bronze or steel
.jpg)
The function of protector
Protection motor luble oil against the invasion by the formation fluid
Connect the pump housin with the motor housing through coubling the motor shaft with the bottom of the protector shaft&pump shaft with the top of the protector shaft
Used as areservoir for the motor luble oil resulting from expansion during motor rotation &provides luble oil to the motor during the
"motor shut down"cooling of the oil
Houses the thrust bearing of the pump
*********************************
pump intake
Is the pump inlet where the produced fluid enter into the pump
(in some cases (especially when the GOR is high
abottom hole gas separator is used to separate the gas and divert it int annulus
the gas separator is also used as apump intake
************************
subsurface pump
subsurface pump used as (self priming,multistage,centrifugal
( pump
It consists of more than one stage .each stage consist of arotating
"part called "impeller
"mounted on the shaft and stationary part called "diffuser
the production rate doesnt change from stage to another and mainly depend on the "shape,diameter
"of the impeller while the head depends on the NO of stage
***********************
vent(junction)box
Is used to vent any gases which may travel with the cable to reach the switch board in order to avoid hazard of explosion or fire
therfor,the vent box should be located 35 feet as minimum from switch board and 15 feet as minimum from the well head
*********************
cables
There are two type of cable
round
flat
"The joint between them called"splice
each cable contains 3 conductor made of cupper or aluminium
each conductor is surrounded by an isulation made of rubber&plastics followed by jacket which protected by an armor made of bronze or steel