APPENDICES
APPENDIX A
DESCRIPTION
Figure A-1 contains a diagram to estimate frictional head losses vs. pumping rate in standard API tubing and casing.
The heavy line displays values for new pipes, the other for used ones.
EXAMPLE PROBLEM
Find the frictional head loss in a 4,500 ft deep well with an old tubing of
1.995 in ID at a liquid flow rate of 1,000 bpd.
SOLUTION
At a 1,000 bpd rate, the specific head loss is read from the diagram as:
Dhfr ¼ 41 psi=1; 000 ft
The total head loss in the tubing string is thus:
DHfr ¼ 41 4; 500=1; 000 ¼ 185 psi
Electrical Submersible Pumps Manual
# 2009 Elsevier Inc.
ISBN 978-1-85617-557-9
All rights reserved.
359
360
1,000
Frictional Losses, ft / 1,000 ft
Inside Diameter, in = 1.049
1"
1 1/4"
1.38
1.61
1 1/2"
2 3/8"
1.995
2 7/8"
2.441
3 1/2"
2.992
4 1/2"
4.0
5 1/2"
5.012
Recommended Maximum Frictional Head Loss
100
10
100
1,000
10,000
Pumping Rate, bpd
Fig. A.1
Appendix A
Tubing/Casing Size =
Diagram to estimate frictional head losses versus pumping rate in standard API tubing and casing
100,000