Meanwhile, it introduces new service station equipment: vapor vac device, EMSdevice, gear pump and submersible pump, LPG dispenser and CNG dispenser.

In this paper, the general situation of artificial lift in China is introduced, and the new development of electrical submersible pump production technology in abroad was analyzed, including electrical submersible pump,separator, protector, electrical motor, control cabinet, cable and so on.

Inspecting defects inside impeller of electric submersible pump by fluid pressure loss measurement method;

Study and application of new oil-gas separator for electric submersible pump;

The study and application of the tool of refloatation and heavy repair of electric submersible pump;

Study and development of cable penetrator on ESP wellhead;

Technology of electric heating below ESP for shallow water oil recovery;

Fuzzy Diagnosis of Working Conditions in Electric Submersible Pump (ESP) System;

Evaluation on the tests of heavy oil production with electric submersible pumps abroad;

In 1/2/4 block oil fields in Sudan,which is run by Greater Nile Petroleum Operating Company Ltd,widely introducing electric submersible pumps in oil production wells has led to increase in fluids output by 7.

The reservoir and geologic characteristics of Wenmi oilfield, however,are different from those of the eastern oilfield in our country,thus the suitability of lifting fluid level by use of submersible electric pumps in this field need to be further studied.

The paper discusses ways of decreasing engineering investment from the aspect of power distribution for submersible electric pump by comparision between voltage step down and step up of power supply, and also discusses the effect of power supply manner on engineering investment.