borehole casing Articles
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Surface-point resistivity survey - Case Study
Drilling boreholes for exploration can be cost ineffective and time consuming. Doing surface-point resistivity survey can provide fast and accurate results, with known position of the target, FlashRES can utilize its electrodes in borehole to target the position of the target, this enables operators to have a good understanding of the interested area. Surface-point resistivity method can also ...
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Borehole logging case study
Corozal, Puerto Rico GeoView was tasked to conduct borehole geophysical logging of at a groundwater extraction well in the rural area of the Municipality of Corozal, Puerto Rico. Prior groundwater tests indicated possible contamination of the groundwater. The study area was primarily underlain by stratified, mostly dark gray basaltic tuff, andesite and basalt porphyry rocks assigned to the Los ...
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Surface borehole resistivity survey case study 1
Surface borehole method can be used to effectively maximise the value of existing boreholes. This is because surface-boreholre method can give operator more geological and geophysical information around the borehole. For example, we did a surface-borehole survey, where there was already well-known mineralisation existing between 60-80m in Figure one and 100-115m. The inversion resistivity ...
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Measuring and interpreting gas flow from landfill boreholes case study
Current landfill gas measurement practice for measuring the gas composition is well understood, and there are standard procedures and instruments available to analyse the gas. It is also current recognised practice to measure the gas 'flow' from boreholes to monitor the production of gas in a landfill site. If care is taken to make the measurement in the same way each time, changes in the 'flow' ...
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Monitoring a high iron and manganese content borehole for hydrocarbons - Case Study
APPLICATION Monitoring a borehole for contamination from a known petroleum spill. CUSTOMER Water Company, UK PROBLEM The customer wished to monitor hydrocarbon levels in a borehole for drinking water. The customer had attempted to use a UV based system but found that the system would only last a matter of a few days before ferric and manganese deposits stopped the system from ...
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Extraction well design for DNAPL recovery.
The potential for downward migration of dense nonaqueous phase liquid (DNAPL) into deeper portions of a saturated hydrogeologic unit has important implications for successful groundwater remediation. Little information has been published regarding the design of extraction wells that allow DNAPL recovery without simultaneously creating a conduit for cross contamination by vertical migration ...
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GPS-enabled gas analyser finds & proves borehole locations case study
Prove it? They can now! Landfill technicians and environmental consultants can now find and prove borehole locations with a GPS-enhanced portable gas analyser from Geotech. Its on-board GPS guidance system takes staff to the precise location of the 1000 it can store. It adds the GPS-received location, date and time to the gas analysis record. GPS locations can be added at boreholes or pre-loaded ...
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Is drinking water from ‘improved sources’ really safe? A case study in the Logone valley (Chad-Cameroon)
Within a cooperation project coordinated by the Association for Rural Cooperation in Africa and Latin America (ACRA) Foundation, water supplies were sampled across the villages of the Logone valley (Chad-Cameroon) mostly from boreholes, open wells, rivers and lakes as well as from some piped water. Microbiological analyses and sanitary inspections were carried out at each source. The ...
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Scanning proposed borehole locations for Utilities case study
Environmental and engineering firms often are tasked with performing soil borings for monitor well installation as part of a Phase II Environmental Site Assessment. This task becomes more challenging when the borings are to be installed in gasoline stations, right of ways or other areas where there are numerous underground utilities that are either unmarked or not properly located. GeoView can ...
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Leakage from drill pipe casing subject to shear deformation
The possibility of fluids leaking from a pressurised drill pipe casing subject to shear deformation caused by various events, including geological activity (such as seismic activity or deformations associated with subsidence related to excavation and construction) in the vicinity of the bore hole, is investigated. An experimental laboratory scoping investigation has been conducted to determine ...
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Sonic Rigs Set the Pace
Drilling geothermal holes in under three hours, sonic rigs have set the pace. Drilling a test hole for a future geothermal project, a Sonic Drill Corporation rig was able to bore past 300ft and complete the hole in two hours and three minutes. The drilling project, part of a law library extension for the University of British Columbia in Canada, was contracted to Hemmera Energy, a division of ...
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Flow measurement technology comparison: GA5000 Vs Hot Wire Anemometer
A typical landfill or contaminated land site under investigation will comprise of a suitable number of gas monitoring wells, with a planned series of monitoring visits. The monitoring will include gas flow measurements, which together with methane and carbon dioxide concentrations will be used to calculate gas screening values (GSV) and hence allow the determination of whether any gas protective ...
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CETCO Products used to successfully install Groundsource Heat Loops - Case Study
Project Details Groundsource Heat Pump Installation 16 boreholes, 630 ft depth Location Roman Condominiums Burlington, Ontario Products Used Geothermal Grout Cetco Crumbles ACCU-VIS K&E Silica Sand Oakville Hydro Energy Services commissioned Geosource Energy Inc. to install geothermal heat loops for a new condominium complex being constructed by an Ontario developer, ...
By CETCO
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Bridge/tunnel base exploration case study
Case 1 A surface-borehole resistivity survey completed for bridge construction As shown infigure 1, this surface-borehole survey was configured to accurately locate known caves for structural reasons. The operator collected 60k data points in only one hour as a result of how the FlashRES-UNIVERSAL can collect all voltage readings for each combination of current electrodes. Figure 2 shows that ...
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Well Rehabilitation with CETCO Drilling Products DPA in Washington State - Case Study
Project Details Port of Morrow Irrigation Wells Location Boardman, OH Products Used DPA Port of Morrow operates a port on the Columbia River near Boardman, OR. In addition to port management, Port of Morrow operates farms in the surrounding area. As part of the farm operation, they manage 22 irrigation wells and pivot systems for irrigating fields in the area. One of the wells ...
By CETCO
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Monitoring of a borehole to detect potential fuel contamination - Case Study
APPLICATION Monitoring a borehole after a diesel spill to en-sure the aquifer is not contaminated. CUSTOMER Water Company, England. PROBLEM The water company used a diesel-powered pump, and this led to a spill from the storage tank. The company wants to ensure that the ar-ea has been properly ...
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WRD Secures Sustainable Water Independence with Continuous Groundwater Monitoring
Overview A Southern California groundwater management agency is capitalizing on the latest remote water monitoring technology to simplify and expand access to continuous groundwater data used to ensure a sustainable water future for its service area. Challenge The Water Replenishment District (WRD) is responsible for monitoring and testing groundwater throughout a 420-square-mile region of ...
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Understanding Sonic drilling
What is sonic drilling? Sonic drilling is a technique that significantly reduces friction on the drill string and drill bit by using energy resonance to affect the soil structure where it contacts the drill string. This combination makes penetrating for a large range of soils much easier. Sonic drilling is most often used when the drilling is difficult and the integrity of the core sample is ...
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High-Resolution Site Characterization with Multilevel Systems
Within the last few years, the U.S. EPA added a new focus area on high-resolution site characterization (HRSC) to their Contaminated Site Clean-Up Information (CLU-IN) website. The U.S. EPA’s definition of HRSC is: “High-resolution site characterization (HRSC) strategies and techniques use scale-appropriate measurement and sample density to define contaminant distributions, and the ...
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