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http://dx.doi.org/10.9720/kseg.2013.1.29

Feasibility Study for the Cleaning of Well Screens using High-voltage Pulsed Discharge  

Chung, Kyoung-Jae (BK21 Research Division of Seoul National University for Energy Resources)
Lee, Seok-Geun (Department of Energy System Engineering, Seoul National University)
Dang, Jeong-Jeung (Department of Energy System Engineering, Seoul National University)
Choi, Gil-Hwan (Center for Advance Research in Fusion Reactor Engineering (CARFRE))
Hwang, Y.S. (Department of Energy System Engineering, Seoul National University)
Kim, Chul-Young (Intercosa Co., Ltd.)
Park, Young-Jun (Intercosa Co., Ltd.)
Publication Information
The Journal of Engineering Geology / v.23, no.1, 2013 , pp. 29-36 More about this Journal
Abstract
The application of appropriate rehabilitation methods can improve the efficiency of clogged wells and extend their life. In this paper, we study the feasibility of well cleaning using high-voltage pulsed discharge, in which electrical energy is used to produce impulsive pressure in water, in contrast to conventional methods that employ chemical or pneumatic energy sources. This technique utilizes the compressive shock wave generated by the expansive force of hot, dense plasma that is produced during a pulsed discharge in the gap between electrodes immersed in water. Compared with conventional techniques, this method is simple, and easy to handle and control. Using a capacitive pulsed power system with an electrical energy of 200 J, an impulsive pressure of 10.7 MPa is achieved at the position 6 cm away from the discharge gap. The amplitude of the impulsive pressure was easily controlled by adjusting the charging voltage of the capacitor and was almost linearly proportional to peak discharge current. The technique achieved good results in cleaning feasibility tests with mock-up specimens similar to clogged well screens.
Keywords
Well rehabilitation; Screen clogging; Impulsive pressure; Pulsed discharge;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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