Water Well Rehabilitation

2017 ◽  
Author(s):  
Neil Mansuy
Keyword(s):  
Water Well ◽  
Well Rehabilitation

The potential use of hydrogen peroxide in water well rehabilitation

2009 ◽  
Vol 23 (1) ◽  
pp. 69-74 ◽  
Author(s):  
F. C. Brassington ◽  
J. P. Whitter ◽  
R. A. Macdonald ◽  
J. Dixon
Keyword(s):  
Hydrogen Peroxide ◽  
Water Well ◽  
Well Rehabilitation ◽  
Potential Use

Investigations on the Performance of a Mechatronic System for Water Well Rehabilitation Using High Power Ultrasonics

2014 ◽  
Author(s):  
Robert Brehm ◽  
Peer Locher ◽  
Johan Linderberg
Keyword(s):  
High Power ◽  
Special Focus ◽  
Ultrasonic Cleaning ◽  
Impaired Performance ◽  
Cleaning Method ◽  
Water Wells ◽  
Well Clogging ◽  
Water Well ◽  
Ultrasound Intensity ◽  
Well Rehabilitation

In Denmark the public water supply is practically 100% served by groundwater abstracted from nearly 20.000 water wells. During time of operation the productivity from a well will often decrease drastically. This impaired performance is usually caused by well clogging. This clogging makes the well economically inefficient for the operator and therefore needs to be rehabilitated. This article examines the performance and evaluates the effectiveness of high power ultrasonics for water well rehabilitation. Special focus is drawn to the inconsistent efficiency of the currently, rarely used ultrasonic cleaning method caused by the specific varying conditions in water wells and correlated ultrasound intensity losses. The scope for improving the, in Denmark, rarely used ultrasonic cleaning method efficiency is investigated and suggestions for improvements based on a proof-of-concept prototype are given based on empirical- as well as theoretical studies.

The Control of Iron Bacterial Plugging of a Well by Tyndallization Using Hot Water Recycling

1986 ◽  
Vol 21 (1) ◽  
pp. 50-57 ◽  
Author(s):  
D. R. Cullimore ◽  
N. Mansuy
Keyword(s):  
Direct Injection ◽  
Small Diameter ◽  
Hot Water ◽  
Water Recycling ◽  
Water Heater ◽  
Time Intervals ◽  
Flow Rates ◽  
Water Well ◽  
Flow Loss ◽  
The Town

Abstract A small diameter water well drilled in 1977 in the Town of Bulyea, Saskatchewan generated such a rapid plugging (biofouling) that by 1979 the flow rate was reduced by 59%. Heavy growths of non-specific iron bacteria were found in the water and biofouling projected to be the principal cause of the flow loss. Tyndallization (repeated pasteurizations) treatment was applied using a hot water recycling system installed above the well head. Using a displacement passive gravity direct injection of hot water at 82°C from a water heater into the well, a sequential elevation of water column temperatures occurred until bio-film dispersion occurred (pasteurization) at 45°C+. A recovery to original flow specifications was repeatedly obtained at time intervals ranging from 6 to 403 days. Between treatments, a recurrence of biofouling was noted with flow reductions of 0.06 – 0.07 1/min/day frequently being noted. The rate of plugging appeared to be affected by the previous sequence of pasteurization treatments. Tyndallization was found to satisfactorily control iron bacterial biofouling and maintain flow rates.

COMPARISON OF WATER WELL SAMPLING METHODS FOR DISSOLVED GASES

2018 ◽  
Author(s):  
Gus Wulsin ◽  
◽  
Colin Whyte ◽  
Myles T. Moore ◽  
Thomas H. Darrah
Keyword(s):  
Sampling Methods ◽  
Dissolved Gases ◽  
Water Well

Development of a risk-based tool for groundwater well rehabilitation and replacement decisions

2019 ◽  
Vol 68 (6) ◽  
pp. 411-419 ◽  
Author(s):  
Gamze Güngör-Demirci ◽  
Juneseok Lee ◽  
Jonathan Keck ◽  
Stephen J. Harrison ◽  
Geoffrey Bates
Keyword(s):  
Water Utilities ◽  
Risk Exposure ◽  
Decision Making Process ◽  
Business Risk ◽  
California Water ◽  
Operational Costs ◽  
Replacement Decisions ◽  
Well Rehabilitation ◽  
Hierarchy Process ◽  
Financial Regulatory

Abstract Groundwater wells are critical drinking water infrastructure elements that widely support basic system supply needs while also providing supply reliability, better water quality (in some cases), and comparatively lower operational costs. Well rehabilitation and replacement are thus an area where water utilities could benefit from rational decision support frameworks and quantitative tools that enable them to better navigate the complex trade-off relationship(s) that exist among a variety of environmental quality, public health, financial, regulatory, organizational, and technological dimensions. Consistent with these considerations, a business risk-based prioritization tool was developed for this study that augments/extends California Water Service (Cal Water)'s well rehabilitation and the replacement decision-making process. For this derivation, a business risk exposure methodology is combined with an analytical hierarchy process (AHP), with the AHP being utilized to determine the weights of the factors involved in the likelihood of failure and the consequence of failure calculation. It is expected that the new tool will assist in optimizing inspection and action plans and identify the wells requiring attention and/or additional work for water utilities.

Model Free Adaptive Control for Thrust Cylinder of Water Well Drilling Rig

2020 ◽  
Author(s):  
Yao Wenlong ◽  
Qi Guanhua ◽  
Yang ke ◽  
Chi Ronghu ◽  
Yang Dejing
Keyword(s):  
Adaptive Control ◽  
Well Drilling ◽  
Drilling Rig ◽  
Model Free ◽  
Water Well
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