horizontal well Articles

  • Evaluation of a Horizontal Well

    Background: Air Sparging Air sparging is an in-situ remediation technology where air is injected into the saturated zone of an aquifer. It is an alternative to conventional ex-situ pump and treat systems for remediation of contaminated ground water. It is necessary to understand the pattern of air flow that will occur in the subsurface in order to determine the optimal placement, ...

  • Horizontal Wells - Technology Overview

    Horizontal well technology has been incorporated into many current environmental remediation applications (and associated contaminants), such as in situ bioremediation, air sparging, vacuum extraction, soil flushing, free product recovery, etc. Ac cording to information reviewed, this technology is most applicable to sites with relatively shallow soil and/or groundwater contamination, and can ...

  • Horizontal Soil Vapor Extraction Wells

    As part of a Corrective Action Plan (CAP) submitted to NYSDEC, a consultant selected Horizontal Soil Vapor Extraction Wells (HSVE) to expand an on-site vapor extraction system in New York. Directional Technologies worked with the consultant on the horizontal well screen design and well layout of three (3) HSVE wells, spaced 50-feet apart, and constructed with 4-inch Schedule 80 PVC materials. Due ...

  • Horizontal Well Rehabilitation at NASA Facility

    A horizontal groundwater extraction well at an active NASA facility in Louisiana was impacted by mineral scaling and bio-fouling affecting operations of the groundwater pump and the treatment system. A flow reduction of over 50% was observed. Directional Technologies, Inc. performed a series of horizontal well rehabilitation activities, that increases flow by 58%, which including mechanical ...

  • Horizontal Remediation Wells - Case Study

    Why wait 30 years…when HRWs are here today! After 30 years of remediation, the responsible party became frustrated with the limitations of vertical wells and the inability of methods used to achieve cleanup goals.  Seeking site closure, the soon to be client, turned to Directional Technologies and Horizontal Remediation Wells (HRWs) to break the stalemate.  The HRWs were ...

  • Time-Tested Advantages of Horizontal Wells

    Wells are wells are wells, right? Both conventional vertical wells and directionally drilled horizontal wells have a screened casing that is connected to solid riser casing which leads to the ground surface. Groundwater or soil vapor is drawn through a well screen to remove contaminants. Remediation agents such as air, bioamendmnents or potassium permanganate are injected through a well screen to ...

  • Horizontal Soil Vapor Extraction and Horizontal Air Sparge Wells Case Study-

    Directional Technologies Is The Expert At Horizontal Soil Vapor Extraction   A horizontal soil vapor extraction well and two horizontal air sparge wells rapidly remediate contamination in situ under a research and development facility. These horizontal wells were installed by environmental directional driller Directional Technologies with no access to inside this sensitve facility. ...

  • Horizontal Recirculation Wells Remediate Fuel Oil Impacts

    Catering to the unique needs of the client and working hand-in-hand with the consultant, Directional Technologies approached a challenging remedial situation with flexibility and a new approach to re-task a horizontal injection well system to horizontal recirculation wells. Directional Technologies invites you to read another case study explaining how a project benefited from decades of ...

  • Is a Horizontal Remediation Well System Right for My Project?

    So your remediation project is moving towards a choice of remedy, whether it involves Dual Phase Extraction, Total Phase Extraction, Biosparging, Soil Vapor Extraction (SVE), Air Sparge (AS), or Chemox Delivery, or any combination of the above. Now, the concept of horizontal remediation wells (HRW’s) for your site seems intriguing. So what do you need to consider before proposing a ...

  • How much does a Horizontal Remediation Well cost?

    In the early days of horizontal remediation wells, the estimated costs made many projects completely unfeasible. However, with the advance of technology in directional drilling and innovative solutions within the environmental industry, this technology is becoming affordable and practical. Like most environmental projects, the cost of a Horizontal Remediation Well will depend on the size and ...

  • Electrical heating with horizontal wells, the heat transfer problem

    Outline Present our mathematical solution of the axial heat transfer problem for electrical heating of a horizontal well. Present some results. Calculation Procedure Derive the Heat Transfer PDE for each region. Obtain the Laplace Transforms of these equations. Solve the above equations. ...


    By McMillan-McGee Corp.

  • Enhanced Bio-Stimulation through Horizontal Wells

    Biosparging technology can be further enhanced when applied through Horizontal Remediation Wells. Since horizontal well systems typically have 4 to 10 times more screen footage in contact with the contaminated media than vertical systems, Horizontal Biosparge Wells can inject much greater volumes while maintaining the same low flow rates. This, in turn, leads to more rapid increases in dissolved ...

  • EU Industrial Policy Strategy: Investing in a smart, innovative and sustainable industry

    On 13 September, in his annual State of the Union address, President Jean-Claude Juncker stated: "I want to make our industry stronger and more competitive. The new Industrial Policy Strategy we are presenting today will help our industries stay or become the world leader in innovation, digitisation and ...


    By Smart Grid Observer

  • Multipurpose Horizontal Remediation Wells Treat Impacts from Former DOD Operations

    The site, a former DOD plant previously used for the manufacture of aircraft and missile systems had TCE impacts that posed a threat to the current occupants at the site.    The site had been recently redeveloped into an industrial complex for several companies. For the new occupants, a disruptive indoor construction to install a vertical remediation system was out of the question. In ...

  • Air and Ozone Sparging of TCE Using a Directionally Drilled Horizontal Well

    A one year pilot test was performed at Marine Corps Base, Camp Lejeune to evaluate the performance of air and ozone-enhanced air sparging via a horizontal well. The primary contaminant at the site is trichloroethylene (TCE), with concentrations ranging from 200 to 800 μg/L at a primary target depth of 40 to 45 feet below ground surface (bgs). Site geology consists of silty clay overburden, ...


    By CH2M Hill Companies, Ltd.

  • Horizontal Remediation Wells - Don`t Disrupt your Client`s Business

    The use of Horizontal Remediation Wells for environmental cleanup is a proven solution for project managers with many benefits including the benefit of the continuation of business activities during mitigation or remediation activities.   Since 1993, Directional Technologies, Inc. has installed thousands of Horizontal Remediation Well systems in the United States and abroad at many different ...

  • DTI installs 3 blind horizontal remediation wells in cobble

    The Issue An active retail gas station next to a wetland area has benzene and trimethylbenzene plumes in a water table aquifer containing sand, gravel and cobbles. Rock fragments and boulders several feet in diameter lie in the vadose zone, between the ground surface and the water table. Business at the gas station would slow down or stop for an extended period of time if a vertical ...

  • Effect of the number and length of zonal isolations on pressure behaviour of horizontal wells

    Horizontal wells with multiple zonal isolations have become a common completion technique in the oil and gas industry. Sand problems, damaged zones, and water or gas coning are the main reasons for using isolators to sustain or improve oil and gas recovery. However, they have certain effects on pressure behaviour of horizontal wells. This paper introduces new analytical models for studying the ...


    By Inderscience Publishers

  • Enhanced Vapor Intrusion Mitigation via Horizontal Remediation Wells

    Vapor Intrusion (VI) is a potential concern at any building - existing or planned, located near soil or groundwater contaminated with volatile organic compounds (VOCs). Conventional installation technologies (vertical wells) can fall short, especially when large structures such as factories, hangars, and offices buildings are involved because they typically involve expensive and lengthy ...

  • Pressure behaviours and flow regimes of a horizontal well with multiple inclined hydraulic fractures

    Hydraulic fractures have become a common stimulation application in the oil and gas industry, especially in tight formations. Published models assume the hydraulic fractures are vertical and symmetric. However, recent studies have shown that fractures are asymmetric and inclined with respect to the vertical direction and the axis of the wellbore. This paper introduces new analytical models that ...


    By Inderscience Publishers

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