Some interesting points regarding ESPs: the older SPE Handbook (Bradley 1987) has two seemingly contradictory quotes on the same page (7-1):
a) The ESP has the broadest producing range of any artificial lift method.
b) The major disadvantage of the ESP is that it has a narrow producing rate range compared with other artificial lift forms.
What is correct? Here's what the newer SPE Handbook says regarding ESPs:
1. 200 to 20M B/D typical (30M max).
2. High-Volume Lift Capacity excellent
3. Low-Volume Lift Capacity generally poor: low efficiency & high operation costs <400 BFPD.
4. Limited by needed horsepower.
5. Can be restricted by casing size.
Hard to know what Bradley was trying to say. Just be aware of both SPE sources, and let this be a lesson on how language can make an otherwise simple question more difficult. I like to underline these "money quotes" in pencil in my Handbook when I run across them.
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