A patented method of designing a sucker-rod
pumping system with least energy consumption,
Patent & Software Introduction
Inventor: Zheng Haijin
Yangzhou Jiangsu Oilfield Ruida Petroleum Engineering
Technology Development Co.,Ltd, China
2008.4
Yangzhou Jiangsu Oilfield Ruida Petroleum Engineering
Technology Development Co.,Ltd, China
Address: No.1, Wenhui West Road, Yangzhou,
Jiangsu Province, P.R.China
Tel: (Technical Department) 0086-514-87761146
(Marketing Department) 0086-514-87761249
Fax: 0086-514-87761146
Email: [email protected]
Http://www.yzruida.com
Contents
1. Overview
2. The theory of calculating the input power of a
sucker-rod pumping system
3. Patented design method and its software for a rod
pumping system with least energy consumption
4.
Applying effects in oilfields’ Practice
5. Achievements and Market potential
I. Overview
Owing
to its unit’s simpleness, convenience
in operation and lower entire cost, suckerrod pumping system is adopted in 80% oil
wells all over the world. In these pumping
wells, the system efficiency has been
remaining low all the while, which results in
a higher energy cost in oil production .

According to a statistical report of former
CNPC in 1997, CNPC had 72047 rod-pumping
oil wells ,the average system efficiency of these
wells was only 26.7%, which meant that 73.3%
of total energy consumption was wasted in the
lifting process and resulted in serious
mechanical wear. How to improve the system
efficiency of pumping well had been focused on
all along. Many researches had been done on
mechanical innovation ,and had made some
progress in this aspect.
Problem

By careful research, we found that, besides
mechanical factor, an important reason
caused low efficiency was that designed
system parameters were unreasonable (it
was technically executable but
economically unreasonable). The key
reason for this problem was lack of a
theory of calculating input power of
sucker-rod pumping system ,and lack of a
more economical design method.
After several years’ research both on theory and
experiments, we had founded a theory for
calculating the input power of a sucker-rod
pumping system ,and had set up formulas to
calculate it. We also invented a method to design a
rod pumping system of least input power or lowest
annual cost for a target production.
 It has been testified by practice that, compared
with conventional designing methods, this
expertise has more prominent virtue in improving
efficiency of pumping system and reducing energy
consumption. And also, it can remarkably reduce
operating cost by prolonging the well’s TBO .

Design methods go through Three stage:
First stage：For the same target production ,a rod
pumping system was designed on the principle of
least investment .
Second stage: For the same target production ,a rod
pumping system was designed on the principle of
lightest load.
Third stage: For the same target production ,a rod
pumping system is designed on the principle of
least power consumption (or least input power).
Contents
1. Overview
2. The theory of calculating the input power of a
sucker-rod pumping system
3. Patented design method and its software for a rod
pumping system with least energy consumption
4.
Applying effects in oilfields’ Practice
5. Achievements and Market potential
2. The theory of calculating the input power of a
sucker-rod pumping system
Newly classify the components of the input power of a sucker-rod
pumping system
Find out the influencing factors for each part of the input power
 Bring forward functional relations of each part of the input
power
2.1 Components of the input power
Through analyzing energy consumption in lifting process, we, for
the first time, bring forward that the input power of a sucker-rod
pumping system should be classified into five major parts as
follows:
surface mechanical loss power:Psu
down-hole viscous friction loss power:Pv
Input power:Pin
down-hole sliding friction loss power:Psl
solution gas expanding power:Pex
Useful power:Pu
2.2 Surface mechanical loss power
Definition:
Surface mechanical loss power is the loss
power of the pumping unit and the motor in
lifting process.
surface mechanical loss power:
influencing factors :
①motor power without load: Pd
②loads: Fup,average load of polished rod in up stroke;Fdown:average load of
polished rod in down stroke;
③stroke length :s
④pumping speed :n
⑤influence coefficient of transmission power:k1
⑥ influence coefficient of polished rod power:k2
the functional relation:
Cutting point
2.3 Down-hole viscous friction loss power
Definition:
Down-hole viscous friction loss power is the
loss power caused by the friction occurred
between liquid and the tubing , and between
liquid and rod string in lifting process.
Down-hole viscous friction loss power:
influencing factors: ：①stroke , ② pumping speed ,
③ tubing diameter , ④ rod diameter , ⑤ pump setting depth ,
⑥ crude oil viscosity
the functional relation:

ui：the average liquid viscosity in the i-th tubing segment
li：length of the i-th tubing segment
m: ratio of rod diameter to tubing diameter
2.4 Down-hole sliding friction loss power
Definition:
定义：因井斜造成的抽油杆与油
Down-hole sliding friction loss power is the loss
管之间发生的磨擦以及泵柱塞与泵
power caused by the friction occurred ,because
of筒间发生的磨擦而损失的功率称作
well deviation, between the tubing and the
rod
string and between the plunger and the
滑动损失功率。
pump cylinder in lifting process
Down-hole sliding friction loss power:
influencing factors:
①pumping speed and stroke
②average rod weight of unit length
③horizontal length of inclination section
④sliding friction coefficient between rod and tubing
the functional relation:
fk：sliding friction coefficient between rod and tubing
qrod：average rod weight of unit length
Llevel：horizontal length of inclination section
2.5 Solution gas expanding power
Definition:
In lifting process, solution gas is continuously separated
from crude oil because of pressure drop in tubing. On
the one hand ,this causes drop of liquid’s energy (viz.
drop of intrinsic energy), on the other hand, the
dropping portion of intrinsic energy is tranformed into
volume expanding power which acts on the lifting
system. This kind of power is called Solution gas
expanding power.
Solution gas expanding power:
influencing factors:
①daily oil production ,②saturation pressure ,
③wellhead pressure ,④pump intake pressure ,
⑤solution coefficient
the functional relation:
2.6 Influencing factors of wellhead temperature
and its functional relation
From the bottom of the well to wellhead, the temperature
corresponding to different depth is fallen in pace with the
decrease of depth. Meanwhile, oil viscosity varies with the change
of temperature. The wellhead temperature needs to be
determined if we want to know how much the change of
temperature affects down-hole viscous friction loss power.
Wellhead temperature:
influencing factors: ①reservoir temperature. ②
surface temperature. ③liquid production.④water
cut . ⑤ fluid level. ⑥solution gas expanding power
the functional relation:
Twellhead  k1Q1 (Tlayer  Tground )  k2Q1H dyn  k3 Pextension  C2
Q1  Q  (Cw Co  1)Qf w  Q  0.72Qf w
2.7 Influencing factors of iLi and its
functional relation
iLi is the accumulated total of multiplication of the length
of each tubing section by the liquid viscosity in the
corresponding tubing section. In order to calculate down-hole
viscous friction loss power ,the value of iLi must be
determined.
iLi
influencing factors:
①reservoir temperature . ②surface temperature.
③ wax precipitation point . ④liquid production.
⑤water cut. ⑥50℃ degasified crude oil viscosity
the functional relation:
  L  K  T
i
i
1
0
layer
 Twax   K 2 0Qoil Twax  Twellhead 
 K 3 0   f  1.2 f w   C
2
W
2.8 Useful power
Definition:
Useful power is the power
needed to pump liquid
production from the
working fluid level to
surface in lifting process.
Influencing factors:
Daily liquid production;
Liquid density;
Liquid lifting height;
2.9 Calculating formulas of input
power and system efficiency with
each part of input power
Pin = Pu+Psu+Psl+Pv-Pex
η = Pu/ Pin
= Pu/（Pu+Pv+Psu+Psl-Pex）
2.10 Practical verification of the theory
In order to verify the validity of the theory and
its adaptability to different reservoirs, we tested
the actual system input power of 428 wells of 28
reservoirs in Jiangsu oilfield, and calculated the
theoretical input powers by the above formulas.
Results showed that theoretical input powers
matched well with the tested input powers.
Results of the verification
Wells tested ：428
 Total input power measured ：3362 Kw
 Total input power calculated ：3327Kw
 Average efficiency measured ：26.0%
 Average efficiency calculated ： 26.3%
 Relative error of input power：1.1%

Through analyzing the sensitivity of 14 variables to the
input power (The 14 variables are detailed as follows:
production rate, water cut, working fluid level, middle depth of
oil layer, crude oil density, gas-oil ratio (GOR), saturation
pressure, solution coefficient, reservoir temperature, wax
precipitation point, surface temperature, 50 ℃ degasified oil
viscosity, oil viscosity in the oil layer, horizontal displacement of
the well deviation) , it was found that the theory of calculating
the input power is universally applicable to 428 wells with
various production parameters in 28 reservoirs of different
geophysical parameters.
Measured input powers and calculated input powers in Chen 2 block
12.000
Input power (KW)
10.000
8.000
6.000
4.000
2.000
Well NO.
Chen 2-9
Chen 2-7
Chen 2-6
Chen 2-5
Chen 2-4
Chen 2-31
Chen 2-27
Chen 2-26
Chen 2-25A
Chen 2-24
Chen 2-23
Chen 2-22
Chen 2-21
Chen 2-20
Chen 2-2
Chen 2-18
Chen 2-17
Chen 2-16A
Chen 2-14
Chen 2-13
Chen 2-12
Chen 2-11
Chen 2-1
Chen 2
0.000
Measured input power
Calculated input power
Measured
input power
Calculated
input power
Useful
power
Measured
efficiency
Calculated
efficiency
relative
error
133.9
138.3
39.1
29.2%
28.2%
-3.2 %
Measured input powers and calculated input powers in Fumin block
14.000
Input power (KW)
12.000
10.000
8.000
6.000
4.000
2.000
Well NO.
Fu 97-1
Fu 97
Fu 91-2
Fu 91
Fu 73
Fu 68
Fu 39
Fu 22
Fu 18
Fu 116
Fu 115
Fu 11
Fu 109
Fu 103
Fu 100-1
0.000
Measured input power
Calculated input power
Measured input
power
Calculated
input power
Useful
power
Measured
efficiency
Calculated
efficiency
relative error
121.0
118.6
42.2
34.8%
35.5%
2.0%
Measured input powers and calculated input powers in Hua, Lian,Ji blocks
18.000
16.000
Input power (KW)
14.000
12.000
10.000
8.000
6.000
4.000
2.000
Well NO.
Qiu 3
Lian 8
Lian 28-1
Lian 28
Lian 24-1
Lian 24
Lian 23-1
Ji 5-1
Ji 5
Ji 4
Hua 6
Hua 3A
0.000
Measured input power
Calculated input power
Measured input
power
Calculated input
power
Useful
power
Measured
efficiency
Calculated
efficiency
relative error
96.7
90.2
26.9
27.8%
29.8%
7.2%
Measured input powers and calculated input powers in Shanian block
12.000
8.000
6.000
4.000
2.000
Well NO.
Sha 7-7
Sha 7-3
Sha 7-19
Sha 7-17
Sha 7-1
Sha 20-8
Sha 20-5
Sha 20-17
Sha 20-14
Sha 20-11
Sha 20
Sha 19-6
0.000
Sha 11
Input power (KW)
10.000
Measured input power
Calculated input power
Measured input
power
Calculated
input power
Useful
power
Measured
efficiency
Calculated
efficiency
relative
error
151.5
151.2
43.2
28.5
28.6%
0.2%
Verification by wells of Daqing Oilfield
24
Pre-Opt Measured
Pre-Opt Calculated
Design
Post-Opt Measured
Post-Opt Calculated
16
12
8
4
Well No.
P78-81
P63-74
P65-72
P100-71
T113-60
P88-79
P81-69
P79-54
T105-63
P75-84
P74-74
P73-822
P73-78
P65-77
0
P115-57
Input power
20
Further verification had been made by
applications of the new design method to about
10000 pumping wells in oilfields of China. It
showed that the theory of calculating input
power is universally applicable to all wells with
various production parameters in different
reservoirs of different geophysical parameters.
2.11 Relationship between Influencing factors and
losses power
 rod speed
Ploss
(stroke × Pumping speed)
 Load
Ploss
No-load loss
Crude oil viscosity
Ploss
Ploss
Ratio of rod to tubing
Ploss
Main ways to improve the efficiency
Slow the rod speed, namely increase plunger diameter or
improve the pump’s efficiency
Reduce the load, namely reduce the weights of rods and liquid
Reduce the prime mover’s power under no load
Decrease the viscosity of oil
Increase the ratio of tubing radius to rod radius
Select favorable types of beam pumping unit and match the
prime mover rationally
Reduce the weight of unit rod in deviated interval of well
Contradictions among various ways to
improve the efficiency
Under same pumping depth, larger plunger diameter generally results in
larger diameter of rod string, heavier fluid load and heavier rod weight.
The total power loss is a decreasing function of plunger diameter,
meanwhile is an increasing function of rod diameter, liquid load and rod
weight.
Under given working fluid level and given plunger diameter, to improve
pump efficiency, it can be only realized by deepening pumping depth (or
increase the submergence depth), which will undoubtedly increase load of
rod string and lifted liquid, horizontal displacement of rods in deviated well.
The total power loss is a decreasing function of pump efficiency , also an
increasing function of rod diameter, load , pumping depth and horizontal
displacement.
Under different plunger diameter , different rod strings
have distinct influence on pumping efficiency .
Under same plunger diameter and same pumping depth,
different steel grades of rod correspond to different rod
string and different economic benefits
Contents
1. Overview
2. The theory of calculating the input power of a
sucker-rod pumping system
3. Patented design method and its software for a rod
pumping system with least energy consumption
4.
Applying effects in oilfields’ Practice
5. Achievements and Market potential
3、 Patented design method and its software for a
rod pumping system with least energy consumption
To overcome the contradictions mentioned above,
we invented a method of designing pumping system
parameters on principle of the lowest input power
or the lowest annual cost.
This design method has been granted patent.
US patent No: US 6,640,896 B1
CN patent No: ZL 99 1 09780.7
3.1 Design preconditions (known parameters)
1.production rate ;
9. reservoir temperature ;
2.water cut ;
10. wax precipitation point ;
3.working fluid level
11. surface temperature ;
12. 50 Celsius degasified oil
viscosity;
13. oil viscosity in place ;
14. Relative parameters of
well deviation
15.economical parameters
4.middle depth of oil
layer ;
5. oil density ;
6.gas-oil ratio (GOR) ;
7.saturation pressure;
8.solution coefficient ;
3.2 Designing outcome (parameters to be designed)
1) type of beam unit
2) type of motor
3) tubing diameter
4) pumping depth
5) plunger diameter
6) steel grade of rod-string
7) rod string
8) stroke
9) pumping speed
3.3. Designing procedure (soluting procedure)
In order to producing same target production ,
(1) Set the selective range of different tubing
diameters, different plunger diameters, different
steel grades of rod string, different rod strings,
different strokes, different pumping speeds,
different pump depths and different types of
pumping unit.
(2)Find out all the systems or combinations of
tubing diameter, steel grade of rod-string,
plunger diameter, pump depth, rod-string,
stroke and pumping speed , which can produce
the target production.
(3) Calculate respectively the input power and
efficiency of each system or combination by the
calculation formulas of system input power.
(4)From all the systems or combinations,
choose the one of least input power as the
result to be designed, which includes
tubing diameter, steel grade of rod,
plunger diameter, pump depth, rod-string,
stroke, pumping speed, type of pumping
unit and type of motor .
3.4 Difference between the patented design method
and the conventional design method
①Different design principles:
Same Objective：Production
Conventional method：Load , torque and pump
efficiency serve as constraint conditions
New method： Load, torque and input power serve
as constraint conditions
②Difference in parameters required for design
Conventional method:
Parameters needed :
1. Liquid production
2. water cut
3. fluid level
4. gas-oil ratio (GOR)
5. crude oil viscosity
6. middle depth of payzone
Result includes:
1. type of pumping unit
2. motor type
3. tubing diameter
4. pump depth
5. plunger diameter
6. steel grade
7. Rod-string
8. stroke
9. pumping speed
The patented design method:
This patented design method needs 15 parameters as follows,
while other conventional methods merely needs 6 ones(1-6 listed).
Parameters needed :
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15
liquid production
water cut
fluid level
mid-depth of payzone
crude oil density
GOR
saturation pressure
solution coefficient
reservoir temperature
wax precipitation point
surface temperature
viscosity of degasified crude oil
oil viscosity in place
well deviation
economical parameters
Result includes:
1. type of pumping uint
2. motor type
3. tubing diameter
4. pump depth
5. plunger diameter
6. steel grade of rod string
7. rod-string
8. stroke
9. pumping speed
③Differences in system input power , efficiency and
economic virtue between the patented design method
and conventional design method
Well name: Wei 2-6
23.18
Pump
efficiency
0.36
System
efficiency
9%
19.6
8.62
0.7
25%
$11,311
19.6
3.45
0.73
62%
$6,341
Designing principle
GOR
Production
Input power
Conventional
method
19
19.6
19
New method
19
Annual cost
$26,768
Note: Annual cost includes energy cost and annual depreciation cost of tubing and rod string
3.5 Based on the patent method mentioned above,
a software (Pumping Star) has been developed for
designing a sucker rod pumping system


software function:
Design a sucker-rod pumping system( or system
parameters) with least energy consumption
 Design a sucker-rod pumping system( or system
parameters) with least costs
 Handle the test data of pre-optimization;
 Post-evaluation of the newly-designed pumping
system
Data input
Main window
Data input
Data input
Data input
Data input
Show all design results
Page 1
Show all design results
Page 2
Show all design results
Page 345
Show all design results
Page 468
Select design result
Result output
Applying effect
Contents
1. Overview
2. The theory of calculating the input power of a
sucker-rod pumping system
3. Patented design method and its software for a rod
pumping system with least energy consumption
4.
Applying effects in oilfields’ Practice
5. Achievements and Market potential
4.1 Effect In Jiangsu Oilfield
From Apr. to Dec. 1999， this patented technology had
been applied to 133 wells in Jiangsu oilfield. Technical
supervision department tested these wells. The result was：
Input Power per Well
9.882kW
5.806kW
System Efficiency
24.58%
44.15%
Power-Saving Ratio
41.25%
Annual Power Saved
per Well
35,706kW·h
Effect in Jiangsu Oilfield
Input Power Contrast
45.4
50
44.15
50
40
40
26.3
24.58
30
30
20
20
10
10
0
0
Pre-opt
Post-opt
Estimated System Efficency
Estimated Power-saving
Ratio: 42.67%
Pre-opt
Post-opt
Measured System Efficiency
Measured Power-saving Ratio:
41.25%
4.2
Up
Effects in different oilfields in China
to December 2006, this expertise had been
practiced in 8569 rod-pumping wells with various
conditions in 12 oilfields in China. Each year,
236,000,000KWh power had been saved on average.
The well TBO was also prolonged by about 1/3
consequently.
Applied Condition in oilfields in China
Liaohe
Oilfield
Shengli
Oilfield
Daqing
Oilfield
Listed as Scale Application Project for 6
successive years since 2002;
Applied wells:4672;
Software installed in 2007: 35 sets
Bought out the absolute implement permission
of this patent and installed 18 sets of software in
2004;
Applied wells up to 2005: 3321
Tested well: 11;
Promoted Wells:771, up to 2005;
Software installed in 2007: 90 sets
Effect in different oilfields in China
The effect of the application in 8569 wells in 12
oilfields in China up to Dec. 2006:
Input Power per Well
9.38kW
6.60kW
System Efficiency
17.08%
30.71%
Power-Saving
29.6%
Ratio
Annual power saved
per Well
28,088kW.h
Test Effect in Daqing Oilfield（ 11 wells in the
Sixth Production Plant ）
System Efficiency
Input Power: Reduced by 5.6kW,from 15.71kW to 10.11kW
Power-saving Ratio：35.6%
System Efficiency：Increased by 17.35%
80
60
Pre-Optimization
40
Post-Optimization
20
0
喇9 -
喇1 2 -
喇1 1 -
喇8 -
喇1 1 -
喇1 0 -
喇1 1 -
喇1 2 -
喇9 -
平
2811
2866
2815
2718
2615
282
P263
P28
P273
均
Pre-Optimization
43.87 32.40 10.62 28.17 28.89 22.73 14.22 19.86 16.87 24.21
Post-Optimization
68.01 67.80 60.24 29.79 45.00 31.71 37.70 57.75 28.06 41.56
Effect in Daqing Oilfield
Applied wells：771
Input Power：Reduced by 3.11kW,from 10.14kw to 7.03kw
Power-saving Ratio：30.68%
System Efficiency：Increased by 16.44%
from 22.26% to 38.7%
Plant
1st Plant
2nd Plant
3rd Plant
4th Plant
5th Plant
6th Plant
7th Plant
8th Plant
9th Plant
10th Plant
Sum or Avg.
Applied
wells
10
10
100
100
81
200
100
5
20
145
771
Input power/kW
System efficiency/%
Annual power
saving per well
Power saving
ratio
Pre-Opt
12.75
Post-Opt
8.03
Pre-Opt
30.26
Post-Opt
52.95
/kW·h
42955
/%
37.02
12.52
9.94
8.76
13.68
8.6
12.95
8.37
5.57
10.14
9.79
6.69
6.49
9.46
6.53
7.9
4.53
2.91
7.03
33.47
28.27
21.1
21.91
19.08
8.96
12.51
4.93
22.26%
46.37
47.67
34.41
42.4
30.2
19.9
24.79
10.57
38.70%
25865
30484
22301
43964
20170
45879
32894
22621
30023
21.81
32.70
25.91
30.85
24.07
39.00
45.88
47.76
30.68
Test Effect in Liaohe Oilfield：22 wells in Huanxiling Company
Input Power: Reduced by 3.12KW, from9.8kW to 6.62kW
Power-saving Ratio: 31.8%
System Efficiency: Increased by 12.12%
Effect in Liaohe Oilfield
Applied Wells：3672
Input Power：Reduced by 2.80kW, from 9.3kW to 6.5 kW
Power-saving Ratio ：30.08%
System Efficiency：Increased by 12.45%
from 13.56% to 26.01%
Plant
Huanxilin
Shenyang
Jinma
Shuguang
Jinzhou
Xinlongtai
Lengjia
Qianhai
Ciyutuo
Teyou
Gaoshen
Sum or Avg.
Applied
wells
518
378
180
842
288
411
210
39
279
20
38
3203
Input power/kW
Pre-Opt
10.4
11.24
8.99
8.41
9
7.4
10.19
10.01
9.83
9.30
Post-Opt
6.78
8.96
5.92
5.49
6.52
5.01
7.87
7.9
7.03
6.50
System efficiency/%
Pre-Opt
11.19
20.79
14.53
9.02
18.13
10.74
8.62
10.07
21.36
Post-Opt
22.5
35.14
30.85
19.04
30.24
23.47
21.5
22.55
33.27
13.56%
26.01%
Annual power
saving per
well
Power
saving
ratio
/kW·h
33447
25971
30157
26936
23688
23277
26323
24221
25529
/%
34.81
20.28
34.15
34.72
27.56
32.30
22.77
21.08
28.4
27102
30.08
Effect in Dagang
Applied Wells：454
Input Power：Reduced by 2.72kW, from 22.46% to 38.77%
Power-saving Ratio：26.01%
System Efficiency：Increased by 16.31%
from 22.46% to 38.77%
Plant
1st Plant
2nd Plant
3rd Plant
4th Plant
8th Plant
Gangnan
Sum or Avg.
Applied
wells
153
72
61
36
16
116
454
Input power/kW
Pre-Opt
11.15
9.2
8.37
7.8
10.57
12.3
10.47
Post-Opt
8.79
5.6
5.96
5.43
6.5
9.55
7.75
System efficiency/%
Pre-Opt
25.15
17.06
20.93
23.61
15.97
22.83
22.46%
Post-Opt
39.07
34.46
38.96
33.37
44.07
40.36
38.77%
Annual power
saving per
well
Power
saving
ratio
/kW·h
25116
33266
25033
19659
44071
31889
28363
/%
21.2
39.1
28.8
30.4
38.5
22.3
26.01
Effect In Changqing Oilfield
Applied Wells：155
Input Power：Reduced by 1.12KW
from 3.73KW to 2.61KW
Power-saving Ratio：30.06%
System Efficiency：Increased by 7.8%
from 14.09% to 21.89%
Effect in Sinkiang Oilfield
Applied Wells:15
Input Power：Reduced by 2.1kW,from 6.44KW to 4.34KW
Power-saving Ratio ：32.6%
System Efficiency：Increased by 11.48%,
from 17.66% to 29.14%
Test Effect in Shengli Oilfield：20 wells in Zhuangxi Company
Input Power: Reduced by 4.14kW,from 12.09KW to 7.95 KW
Power-saving Ratio:34.2%
System efficiency
System Efficiency: Increased by 16.7%
80
60
40
20
0
Pre-Optimization
Post-Optimization
106 74- 74- 74- 74- 74- 106 120 56- 74- 3- 96- 52-k3 10- s2 6-3 12- 8-
- -12
2 9-4 31
4
42
8-6
106 104 64- 121
-15 -22 53 -18
k73
96- 平
3
均
Pre-Optimization
45
10 9.5 13 14 15 38 30
31 17 24 40 33 24 46 10 17 29 22
31 27
Post-Optimization
57
49 35 29 25 29 44 61
53 43 51 57 40 36 56 18 36 30 40
69 44
Contrast of Well TBO
☆Effect in Huanxiling Company(2000-2001)
Wells for Evaluation:17
Well TBO: prolonged by 40.7%
Operating Cost: reduced by 40.7%
Contrast of TBO
☆ Statistics in Jiangsu Oilfield
Wells for Evaluation:42
Well TBO: prolonged by 37.6%
Operating Cost: reduced by 37. 6%
Effect Analysis
Power Saved per Well
Prolonged Well TBO
Cost Saved per Well
Investment per Well
Ratio of Input to Output
Annual Profit
28,088kW.h/year
30%
Electricity Cost $2000/year
Operating Cost $1430/year
$700/year
1:4.8
$29,000,000 for applied 8569 wells
Pumping Star in CNPC
In 2007, CNPC installed 300 sets of Pumping Star
for its 13 oilfields.
OILFIELD NUMBER OF
SOFTWARE
Daqing
90
OILFIELD
Jidong
NUMBER OF
SOFTWARE
7
Jilin
35
Dagang
15
Sinkiang
38
Huabei
15
Qinghai
Yumen
Tuha
Beijing
7
7
7
2
Changqing
Xinan
Liaohe
Talimu
35
3
35
4
Pumping Star in SINOPEC
Up to 2007, SINOPEC had installed 27 sets of
Pumping Star.
In 2008, SINOPEC plans to install 150 sets of
Pumping Star for its 8 oilfields.
Contents
1. Overview
2. The theory of calculating the input power of a
sucker-rod pumping system
3. Patented design method and its software for a rod
pumping system with least energy consumption
4.
Applying effects in oilfields’ Practice
5. Achievements and Market potential
5.Achievements
In the patent, all kinds of power consumption in pumping process
are analyzed systematically. Theoretical and technical innovations to
petroleum engineering have been made in the following four aspects
1).Foundation of the calculation theory & formula for
pumping system input power
2).Invention of the design method for a pumping
system on the principle of consuming least energy while
producing the target output
US patent No: US 6,640,896 B1
CN patent No: ZL 99 1 09780.7
3).Development of Pumping Star based on the
patented design method
4). Proposition and application of the devices
modification to fit the patented design method
In 2002，Pumping Star was affirmed by Science &
Technology Office of Jiangsu Province as hightechnical production.
In 2005, this expertise won the Prize for Technology
Invention of SINOPEC
In 2006, Pumping Star was certificated one of the
National New Products by the Ministry of Science &
Technology of P. R. China.
In 2006, this expertise was chosen into the 11th FiveYear (2003-2008) Plan’s “Promotion List of Energy
Efficiency Technology in High Energy Consumption
Industries” by the National Development & Reform
Commission of P. R. China.
In 2007, Pumping Star was granted the Innovation
Fund of Jiangsu Province.
In 2007, Pumping Star was chosen into the list of
<Recommendation
Catalog
of
Energy-saving
Electronic Information & Technology, Products and
Application Programs> by the Ministry of
Information Industry of the P. R. China.
Market Potential
In China, sucker-rod pumping wells count up to about
100,000. If the patent could be applied to all these wells,
the anticipated saved power would approximate 3 billion
kilowatt-hours. Meanwhile, the well TBO (time between
overhaul) would be prolonged and operating cost would
also be reduced by about 1/3 accordingly.
There are about 930,000 sucker-rod pumping wells all over
the world. If this patent could be widely promoted among
these wells, a large energy saving would be brought about.
Estimation for CNPC
Total Wells
Wells in Production
Input Power
System Efficiency
Average PowerSaving Ratio
Annual Power Saved
per Well
Total Power
Saved Annually
99,517
78,861
9.12kW
21.66%
5.34kW
36.98%
41.42%
31738kW.h
2,503,000,000kW.h
Reduced by 3.78kW
Increased by 15.32%
Estimation for SINOPEC（2005）
Total Wells
22,900
Wells in Production
18,021
Input Power
System Efficiency
Power-Saving Ratio
Annual Power Saved
per Well
Total Power
Saved Annually
9.89kW
6.51kW
Reduced by 3.38kW
24.33%
36.96%
Increased by 2.63%
34.2%
28,392kW.h
512,000,000kW.h