How to Select a Sucker Rod Pump:
Well data to be collected before pump selection:
a) Oil layer depth, effective thickness, effective permeability;
b) Casing specifications, well inclination, azimuth, well bends, and other technical conditions;
c) Well fluid production index, static fluid level, dynamic fluid level;
d) Crude oil surface and underground viscosity, and well sand production, wax deposition, scaling, and corrosion;
e) Well production, water cut, gas-oil ratio, and other production conditions;
f) Well production history.
Sucker Rod Pump Selection:
The pump diameter and leakage rate of the sucker rod pump should comply with the requirements of SY/T 5059.
Pump Diameter and Pumping Parameters Selection:
Determination of the Theoretical Displacement of the sucker rod pump.
Based on well data and program requirements, the well production and pumping depth can be approximately determined. The theoretical displacement is calculated according to formula (1).
Calculation formula:
Qt ── Theoretical displacement, t/d;
Q ── Oil well production, t/d;
η── Sucker rod pump efficiency, dimensionless, determined according to the scheme requirements.
Selection of pump diameter and pumping parameters:
Determine the stroke and pumping frequency based on the oil well conditions and the pumping unit's capacity.
Calculate the K value according to formula (2).
Calculation formula:
K ── Sucker rod pump constant;
s ── Sucker rod pump stroke, m;
n ── Sucker rod pump pumping frequency, min-1.
Select the corresponding pump diameter that is close to the K value in Table 3 based on the K value calculated according to formula (2). It is recommended to select a pump diameter one level higher.
Standard Sucker Rod Pump Selection Table:
| Pump depth，m | <900 | 900～1500 | 1500～2100 | >2100 | ||||||||||||||
| Pump type | Rod pump | Tubing Pump | Rod pump | Tubing Pump | Rod pump | Tubing Pump | Rod pump | Tubing Pump | ||||||||||
| Stationary Barrel Type | Traveling Barrel Type | Stationary Barrel Type | Traveling Barrel Type | Stationary Barrel Type | Traveling Barrel Type | Stationary Barrel Type | Traveling Barrel Type | |||||||||||
| Top Anchor | Bottom Anchor | Top Anchor | Bottom Anchor | Top Anchor | Bottom Anchor | Top Anchor | Bottom Anchor | |||||||||||
| Well conditions | Inclined well | a | c | - | a | a | c | a | a | a | c | - | a | c | c | - | b | |
| High fluid volume | - | - | b | a | b | b | a | a | a | c | a | a | c | a | b | b | ||
| Low fluid level | a | - | - | - | a | b | - | - | a | b | - | - | - | a | - | - | ||
| Vertical well | a | b | b | b | a | a | c | a | b | a | a | a | c | a | c | b | ||
| Medium sand content | a | - | c | c | a | - | b | c | a | - | c | b | - | a | - | c | ||
| High sand content | a | - | c | c | a | - | b | c | a | - | c | b | - | a | - | c | ||
| Salt | a | c | a | b | a | c | a | a | a | a | a | a | c | a | c | b | ||
| Hydrogen sulfide | a | b | b | b | c | a | b | a | - | b | a | a | c | a | c | b | ||
| Carbon dioxide | a | b | b | b | b | a | a | a | c | a | a | a | c | a | c | b | ||
| Medium sand content and moderate corrosion | a | c | c | c | a | b | b | b | b | a | a | b | c | a | - | c | ||
| High sand content and high corrosion | a | c | - | a | - | c | b | b | a | a | b | c | a | - | c | |||
| Viscosity | Below 400 mPa·s | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | a | |
| Above 400 mPa·s | a | a | c | a | a | a | c | a | a | a | - | b | a | - | - | c | ||
| Note: a – Best practice; b – Widely used; c – Frequently used; “-” – Not recommended. | ||||||||||||||||||