Optimization and Application of Reciprocating Direct-Drive Electric Submersible Plunger Pump Lifting System in the Xinjiang Oilfield

Background: A reciprocating direct-drive electric submersible plunger pump (RDD-ESPP) lifting system is an innovative rodless lifting method, which uses a downhole linear motor to directly drive the plunger pump to lift the fluid. This method effectively overcomes the problems encountered in a conventional sucker rod pumping system, such as severe eccentric wear between the sucker rod and the tubing, higher energy consumption and frequent pump maintenance. Objective: In this manuscript, the objective is to propose a methodology on optimizing the working parameters of RDD-ESPP lifting system and validate the theory with field case. Methods and Results: Mathematical models for the wellbore temperature distribution, lifting load, pump efficiency, system efficiency and tubing strength validation are established. A selection process for the optimal working parameters is proposed, and a parameter sensitivity analysis is implemented. The results show that pump efficiency is largely affected by gas and leakage, and there are reasonable pump submergence depths in oil wells for different produced gas-to-oil ratios. A field application test in a low-production well resulted in a 33.5% power savings rate and 41.6% improvement in the pump efficiency. Conclusion: RDD-ESPP lifting system has a promosing potential on power savings and consumption reduction compared with conventional sucker rod pumping system.

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Application and Design of Plunger Pump Lifting Viscoelastic Fluid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.2507 ◽

2011 ◽

Vol 291-294 ◽

pp. 2507-2511

Author(s):

Juan Li ◽

Hong Zhi Yang ◽

Mei Han ◽

Jin Chao Xu ◽

Xiao Dong Li ◽

...

Keyword(s):

Laboratory Experiment ◽

Viscoelastic Fluid ◽

Large Scale ◽

Field Application ◽

Pump Efficiency ◽

Plunger Pump ◽

Implementation Effectiveness ◽

Sucker Rod ◽

Effective Reduction ◽

Tertiary Recovery

Daqing Oilfield has more than 10,000 million kilograms of oil through tertiary recovery every year. However, eccentric wear of sucker rod and tubing severely impede the implementation effectiveness and large-scale utilization of tertiary oil production when injecting viscoelastic fluids containing polymer. Therefore, a plunger pump lifting viscoelastic fluid is designed based on the analysis of the mechanism of eccentric wear. The principle to reduce eccentric wear is increasing hydraulic and viscoelastic friction, and expanding clearance. Due to make use of the plunger pump lifting viscoelastic, laboratory experiment and field application have demonstrated effective reduction of eccentric wear, extend the life of the sucker rod and tubing, and improve pump efficiency.

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Sucker Rod Antibuckling System: Development and Field Application

SPE Production & Operations ◽

10.2118/205352-pa ◽

2021 ◽

pp. 1-16

Author(s):

Clemens Langbauer ◽

Rudolf Konrad Fruhwirth ◽

Lukas Volker

Keyword(s):

Large Scale ◽

Low Cost ◽

Cost Optimization ◽

Field Application ◽

Oil Field ◽

Oil Fields ◽

Test Facility ◽

System Efficiency ◽

Pumping System ◽

Sucker Rod

Summary When the oil price is low, cost optimization is vital, especially in mature oil fields. Reducing lifting costs by increasing the mean time between failure and the overall system efficiency helps to keep wells economical and increase the final recovery factor. A significant portion of artificially lifted wells currently use sucker rod pumping systems. Although its efficiency is in the upper range, there is still room for improvement compared with other artificial-liftsystems. This paper presents the field-tested sucker rod antibuckling system (SRABS), which prevents buckling of the entire sucker rod string, achieved by a redesign of the standing valve, the advantageous use of the dynamic liquid level, and, on a case-by-case basis, application of a tension element. The system allows full buckling prevention and a reduction of the overall stresses in the sucker rod string. The resulting reduction in the number of well interventions combined with the higher system efficiency prolongs economic production in mature oil fields, even in times of low oil prices. The analysis of SRABS, using finite-element simulations, showed a significant increase in system efficiency. The SRABS performance and wear tests under large-scale conditions were performed at Montanuniversität Leoben’s Pump Test Facility and in the oil field. The results of intensive laboratory testing were used to optimize the pump-body geometry and improve the wear resistance by selecting optimal materials for the individual pump components. The ongoing field-test evaluation confirmed the theoretical approach and showed the benefits achieved by using SRABS. SRABS itself can be applied within every sucker rod pumping system; the installation is as convenient as a standard pump, and manufacturing costs are comparable with those of a standard pump. This paper shows improved performance of the SRABS pumping system compared with a standard sucker rod pump. SRABS is one of the first systems that prevents the sucker rod string from buckling without any additional equipment, such as sinker bars. Testing of SRABS has identified significant benefits compared with standard sucker rod pumps.

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Design of Solar Powered Water Lifting System for Irrigation at Chaukune Ward No.1, Surkhet, Nepal

Khazanah ◽

10.20885/khazanah.vol12.iss2.art55 ◽

2020 ◽

Vol 12 (2) ◽

Author(s):

Sagar Sagar Giri ◽

Keyword(s):

Pump Efficiency ◽

Mountainous Region ◽

Solar Module ◽

Solar Water ◽

Pumping System ◽

Water Pumping ◽

In Series ◽

Solar Powered ◽

Difficult Terrain ◽

Lifting System

Despite the availability of enough water in Nepal, there is difficulty in irrigation in most places. This is due to difficult terrain in hilly and mountainous region. Hand water pumping is possible only in terai region and grid electricity has not reached in most parts of hilly and mountainous region. For these reasons, solar water pumping from appropriate source is the best option. The main objective of this project was to design a solar powered water pumping system at Chaukune ward no 1, Surkhet, Nepal. The targeted area had water demand of 400.171 m3 per day which was supplied from a perennial river, Budhakhola. With a distance of 732 m between the pump and reservoir, a circular reservoir of diameter 11m, height 13 m and thickness 0.3 m was designed at an elevation of 219m from water surface. Solar module of rated power 24.3 kW (18 in series, 5 in parallel) was selected. The volume of storage tank is 1200.513 m3 which is sufficient to store water for 3 days with pump efficiency of 75 percent. The upfront cost, operation and maintenance, replacement cost of diesel pump are about 2-4 times higher than solar photovoltaic pump. This system does not emit greenhouse gases. Solar water pumping is found to be economically viable and environment friendly in comparison to electricity or diesel based systems for irrigation.

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