Submersible electric screw pump is a rodless oil production equipment that fully utilizes the advantages of screw pumps in resisting heavy oil, high gas content, high sand content, high wax content, etc., while avoiding the disadvantages of eccentric wear of the sucker rod in rod pumping pumps, which are not suitable for inclined wells and directional wells. At the same time, the submersible electric screw pump system has high efficiency and significant energy-saving effects.
(1) Suitable for vertical, inclined, and horizontal wells
(2) Displacement range: 2-300m3/d, pump hanging depth: 500-2500m
(3) Crude oil surface viscosity: ≤ 10000mPa • s (25 ℃), reservoir temperature ≤ 120 ℃
(4) At the suction inlet of the unit, the gas content should not exceed 50%
(5) The sand content in the produced liquid is less than 5%, and the maximum particle size does not exceed 0.3mm
1. Submersible screw pump system - classification
Submersible Electric Screw Pump (ESPCP) is a rodless oil lifting equipment that drives a downhole screw pump through a submersible motor. It uses submersible cables to transmit power to the downhole submersible motor, which drives the screw pump to pressurize the well fluid and lift it to the surface.
ESPCP is divided into mechanical deceleration type and permanent magnet motor direct drive type.
The mechanical deceleration ESPCP machine includes: ground control system, submersible motor, protector, reducer, thrust joint, coupling, screw pump, submersible cable, electric pump wellhead, etc.
The permanent magnet motor direct drive ESPCP machine includes: ground control system, submersible permanent magnet synchronous motor, protector, thrust joint, coupling, screw pump, submersible cable, electric pump wellhead, etc.
2. Submersible screw pump system - specifications
Technical specifications for mechanical reduction submersible electric screw pump reducer
Outer diameter(mm) | maximum power | reduction ratio | torque(Nm) | transmission efficiency |
98 | 45kW | 13.14:1 | 1600 | ≥0.9 |
130 | 100kW | 12.67:1 | 4000 | ≥0.9
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Permanent magnet direct drive submersible electric screw pump
Parameters of 114 series low-speed permanent magnet motor
power | torque | voltage | current | length |
kW | HP | Nm | Pft | V | A | m | ft |
5.2 | 7 | 166 | 122 | 158 | 40 | 2.3 | 7.5 |
10.4 | 14 | 332 | 245 | 316 | 40 | 3.8 | 12.5 |
15.6 | 21 | 498 | 367 | 474 | 40 | 5.3 | 17.4 |
20.8 | 28 | 664 | 490 | 632 | 40 | 6.8 | 22.3 |
26.1 | 35 | 830 | 612 | 790 | 40 | 8.3 | 27.2 |
31.3 | 42 | 996 | 735 | 948 | 40 | 9.6 | 31.5
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