Progressing Cavity Pumping Systems
• Introduction to PC Pumps.
• Progressing cavity pump basics.
• Equipment overview: op!drive.
Introduction to PC Pumps
Introduction to PC Pumps System Overview - Topdrive
• $own!%ole pump components:
Progressing
• $own!%ole pump components:
Introduction to PC Pumps Capabilities
• Production 'ates from 1 #P$ to 23334 #P$.
• E5ective production dept%s to 6233 feet.
• 7il gravities from 2 to 89 "PI.
•  emperatures up to 923 .
• $oes not create emulsions.
• $oes not gas loc(.
 
• "ble to produce:
 
 
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
     B      F      P      D
     M      %      P      D
Ft&'(ift
Rod Pumps
 
Introduction to PC Pumps  Applications
• ;eavy oil and bitumen.
• -edium to sweet crude.
• "gricultural areas.
• =rban areas.
Introduction to PC Pumps  Advantages
• Simple two piece design.
• ?ill not emulsify <uid.
Introduction to PC Pumps C!aracteristics
• Interference t between t%e rotor and stator creates a series of isolated cavities .
 
• on Pulsating.
• low is a function of 'P-.
Introduction to PC Pumps "low C!aracteristics
 
• Production rates 1233 bbls)day
• ift capacity 6223 ft.
• Elastomer incompatible wit% certain
• -a,. emperature up to 923 . D93
using conventional elastomersG
 
Progressing Cavity Pump #asics
Progressing Cavity Pump #asics #$mp Classi%cations
Pumps
Displacement
Dynamic
Rotary
Reciprocating
Centrifugal
Special
Peripheral
Progressing Cavity Pump #asics Rotation
•  %e 'otor turns eccentrically wit%in t%e Stator.
• -ovement is actually a combination of two movements:
& 'otation about its own a,is
 
Progressing Cavity Pump #asics &isplacement 
 
ccentricity
 
1
D
P
D
D 6 Minor Diameter of 4tator 
Ma7or Diameter of 4tator 
 
C./+'/0./%) 12   M)0).4' 23
Progressing Cavity Pump #asics #C #$mp Types
 
Copyright 2008, NExT, All rights reserved
• low rate is a function of rotor diameterH eccentricityH pump pitc% lengt% and 'P-.
• Pressure capability is determined by t%e number of stator pitc%es.
Progressing Cavity Pump #asics &esign #arameters
 
• -anufacturers rate t%e pressure capability of a
pump as a function of t%e number of pump
stages or seal lines. Pressure capability is
determined by t%e number of stator pitc%es
• 7ne stage is dened as t%e pump lengt% required
to o5set 33 psi of di5erential pressure.
Progressing Cavity Pump #asics Stages and 'ead
4tator Pitc5
3otor Pitc5
8or % 3otor Pitc5es9
actors w%ic% a5ect t%e %ead
rating:
Dincreased seal line contact
 
• ifting capacity is typically
rat%er t%an stages.
&   stage J appro,. 33 psi
&   stage J appro,. 91 ft of lift
&   stage J appro,. K3 meters of lift
&   stage J appro,. 6L3 Mpa
• "n N stage pump DN33 psiG is
commonly referred to as a
8333 ft D933 meterG pump.
Progressing Cavity Pump #asics Stage Ratings
 
Progressing Cavity Pump #asics Stages vs &ept!
+
)+
$+
%+
FT #F (IFT !$#
• Slip can be dened as: A"
reduction in <ow rate caused by a
di5erential pressure greater t%an
atmosp%ericB.
one cavity to t%e ne,t at very
%ig% velocities.
F ( : ID
4 ( IP
• /olumetric E@ciency is t%e most common
met%od used to measure pump performance.
• /olumetric E@ciency can be dened as:
& t%e #enc%mar( lowrate O 3 %ead minus t%e ASlipB
O rated %ead.
Progressing Cavity Pump #asics )*ciency+ #ress$re and Slip
 
Progressing Cavity Pump #asics )*ciency+ #ress$re and Slip
41+G/0
Feet of (ift
20% Slip @ rated
Progressing Cavity Pump #asics )*ciency+ #ress$re and Slip
41+G/0
Feet of (ift
10% Slip @ rated
• Slip is dependant upon:
&  %e viscosity of t%e <uid.
&  %e interference t of t%e rotor in t%e stator.
• In most casesH slip is independent of speed.
$i5erential pressure e5ects.