The Driller
  • Sign In
  • Create Account
  • Sign Out
  • My Account
  • NEWS
  • CLASSIFIEDS
  • EQUIPMENT
  • SAFETY
  • VIDEOS
  • EDUCATION
  • SOURCEBOOK
  • EVENTS
  • SUBMIT
  • ABOUT
  • SIGN UP
cart
facebook twitter linkedin youtube
  • NEWS
  • Water
  • Geothermal
  • Construction
  • Environmental
  • Mining
  • All Industry News
  • EQUIPMENT
  • Rigs & Heavy Equipment
  • Consumables
  • Pumps
  • Featured Products
  • VIDEOS
  • Newscast
  • Drill Talks
  • Ask Brock
  • Emerging Drillers
  • EDUCATION
  • Drilling Business Insights
  • Reference Desk
  • Sponsored Insights
  • EVENTS
  • Conferences & Demo Days
  • Newscast LIVE
  • SUBMIT
  • Drillers @Work
  • ABOUT
  • Contact
  • Advertise
The Driller
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
The Driller
  • NEWS
    • Water
    • Geothermal
    • Construction
    • Environmental
    • Mining
    • All Industry News
  • CLASSIFIEDS
  • EQUIPMENT
    • Rigs & Heavy Equipment
    • Consumables
    • Pumps
    • Featured Products
  • SAFETY
  • VIDEOS
    • Newscast
    • Drill Talks
    • Ask Brock
    • Emerging Drillers
  • EDUCATION
    • Drilling Business Insights
    • Reference Desk
    • Sponsored Insights
  • SOURCEBOOK
  • EVENTS
    • Conferences & Demo Days
    • Newscast LIVE
  • SUBMIT
    • Drillers @Work
  • ABOUT
    • Contact
    • Advertise
  • SIGN UP

Well Abandonment Procedures

By David S. Bardsley
September 1, 2011
Or all is not well that ends a well.



Over the past several decades, tens of thousands of monitor, injection and extraction wells have been constructed at various locations throughout the United States. Wells have been completed on very small parcels, such as retail petroleum/dry cleaners, on multiple-acre sites for manufacturing/refining facilities, and on multiple-square-mile sites, such as Department of Energy/Defense locations.

As sites reach the remediated/closed stage, the wells may not be required, and can be a hindrance to future development. We now are seeing a significant increase in well abandonment activities across a wide variety of sites. Specific well abandonment procedures differ widely, depending on many variables, including, but not limited to:
  • state and local regulations,  
  • well depth and diameter,  
  • screen and casing composition,
  • physical well location, and
  • final surface restoration requirements.
For example, the California offices of WDC Exploration & Wells operate under a loose set of standards for well abandonment at current/former underground storage tank sites. The methods utilized conform to industry practices, are safe, comply with all local regulations, and are cost-competitive. Most of the wells are constructed of either 2-inch or 4-inch PVC, to depths of less than 100 feet deep, and originally were completed in asphalt or concrete areas. Additionally, the state/local requirements for proper well abandonment call for either completely over-drilling and removal of all well materials, or pressure grouting in place. If we are in a jurisdiction that approves pressure grouting in place, WDC utilizes the following procedures:


Pre-project Meeting


  • Visit site as necessary.
  • Secure permits.
  • Confirm access agreements.
  • Determine whether there are pumps/other equipment in the wells.
  • Deal with all other standard pre-construction issues.


Air-knife (vacuum extraction) Rig and Crew Mobilize to Site


  • Verify all power disconnects have been made and system locked out.
  • Remove well box/vault.
  • Air knife around the well seal (grout) to between 8 feet and 10 feet below ground surface, or as specified by the client.
  • Backfill the excavation and air-knife holes with native material (well cap still in place).
  • Asphalt patch the surface, and demobilize.


Drill Rig Mobilizes to the Site


  • Excavate the patch over the well.
  • Run tremie pipe to the bottom of the well using the drill rig.
  • Mix and pump backfill material, as specified by regulations, (cement/bentonite grout, cement or high-solids bentonite grout) from the bottom of the well to the surface, as the tremie is being pulled with the rig.
  • Once the water is displaced from the well, and the backfill material no longer is dropping in the casing, a pressure head is placed on the well, and an air compressor is used to place between 25 psi and 35 psi on the well for between 15 and 45 minutes.
  • Bleed pressure from system and remove pressure head.
  • Visually inspect grout in well and top off with backfill material, using tremie pipe if necessary.
  • Use hollow-stem augers to drill out the top 5 feet to 10 feet of the well casing.
  • Backfill top 5 feet to 10 feet, per local regulations.
  • Restore surface.
  • Complete and submit all required forms.
The above procedures can be completed within the existing regulations in a safe manner. These methods have a long track record of success and client satisfaction.

Because of the current hyper-competitive nature of the drilling and consulting business, owners, consultants and drilling contractors always are trying to identify less expensive methods for well abandonment. Recently, we have seen bid requests for well abandonment projects utilizing air-knife equipment only. While this may be a less expensive method, we have identified several significant safety/technical issues, including:

  • Lowering tremie pipe into the well and retrieving by hand increases the risk of back strains and hand injuries.
  • Not running tremie pipe to the bottom of the well, which is outside of industry standards for pressure grouting operations – manually lifting and holding grout hoses at the well head is a potential back-strain hazard.
  • Attempting to remove the top 5 feet of well casing by hand – the unscrewing method rarely is successful, and may lead to back strains and hand injuries. When the unscrewing method fails, the contractor then must attempt to cut the casing below grade by hand. This is a highly dangerous activity.

We understand the need to reduce costs in today’s challenging business climate. However, proposing to use an inexpensive/faster method without a thorough safety and technical review can lead to accidents and non-compliance with regulations. The safety of our employees, consultant partners and the public must be the driving force in how we conduct our work every single day. Taking the time to think “what is the worst thing that can happen?” needs to be second nature for every activity performed in the field. It is imperative all procedures be reviewed prior to field activities to assess potential hazards and mitigation methods. The Job Safety Analysis (JSA) protocol was created for a reason, and should be reviewed and followed. If a JSA does not exist for an activity/method, then that specific operation should not occur until a JSA has been developed, reviewed and approved. While the industry may limit costs by performing abandonment activities with the use of an air knife only, we must not underestimate the potential safety issues for our workers. Ask yourself, “Are we using an alternative method because the right way takes too long and is expensive, or is the task we are proposing equally safe and technically feasible?” Cost reduction must never be the driving force behind a field operation if it exposes our employees, consultant/client partners and the public to additional safety and technical risk.
ND

Share This Story

Looking for a reprint of this article?
From high-res PDFs to custom plaques, order your copy today!

David bardsley 200px
David S. Bardsley is business development manager for Directed Technologies Drilling.

Recommended Content

JOIN TODAY
to unlock your recommendations.

Already have an account? Sign In

  • geotechnical drilling rig

    6 Onsite Phrases Environmental Drillers Hate

    Here are six phrases that highlight common frustrations...
    Opinions
    By: Jeff Garby
  • Wayne Nash

    Pipe Stuck? Common Causes and Solutions for Drillers

    If you have drilled for any length of time, sooner or...
    Water Wells
    By: Wayne Nash
  • submersible pumps, water well pumps

    Selecting and Sizing Submersible Pump Cable

    This article helps pump installers and servicers decide...
    Pumps
    By: Bob Pelikan
You must login or register in order to post a comment.
Unable to fetch comments.

Report Abusive Comment

Subscribe For Free!
  • eNewsletters
  • Online Registration
  • Subscription Customer Service
  • Manage My Preferences

More Videos

Sponsored Content

Sponsored Content is a special paid section where industry companies provide high quality, objective, non-commercial content around topics of interest to the The Driller audience. All Sponsored Content is supplied by the advertising company and any opinions expressed in this article are those of the author and not necessarily reflect the views of The Driller or its parent company, BNP Media. Interested in participating in our Sponsored Content section? Contact your local rep!

close
  • demo of a DM450 drilling rig during a customer factory visit
    Sponsored byGeoprobe

    Built for You: Smarter Drill Rigs, Stronger Support, Bigger Opportunities

Popular Stories

MainPhotoTwoBrothers.jpg

Two Brothers' Journey Through the Drilling Industry

AI and Drought Concerns

AI’s Growing Thirst for Water and Power

demo of a DM450 drilling rig during a customer factory visit

Built for You: Smarter Drill Rigs, Stronger Support, Bigger Opportunities

The Driller Classifieds

COMPRESSORS

EAST WEST MACHINERY & DRILLING IS BUYING AND SELLING AIR COMPRESSORS, AIR BOOSTERS, AIR ENDS & PARTS
Company: East West Machinery

DRILL RIGS

LOOKING FOR LATE MODEL TOPHEADS & DRILLTECH D25'S
Company: Spikes’s Rig Sales

DRILL RIG PARTS

MEETING DRILLERS NEEDS AROUND THE WORLD
Company: East West Machinery

ELEVATORS

SEMCO INC. PIPE ELEVATORS
Company: Semco Inc.

GROUTERS

GROUTING EQUIPMENT - GROUT PUMPS & GROUT HOSE REELS
Company: Geo-Loop Inc.

PUMP HOISTS

SEMCO INC. - BASIC PUMP HOISTS
Company: Semco Inc.

WELL PACKERS

LANSAS PRODUCTS - INFLATABLE WELL PACKERS
Company: Vanderlans Lansas Products

WELL SCREENS

WELL SCREENS & SLOTTED PIPE
Company: Alloy Screen Works

Products

Water Quality Engineering: Physical / Chemical Treatment Processes

Water Quality Engineering: Physical / Chemical Treatment Processes

By carefully explaining both the underlying theory and the underlying mathematics, this text enables readers to fully grasp the fundamentals of physical and chemical treatment processes for water and wastewater.

See More Products

Subscribe to The Driller Newscast

Related Articles

  • Floating ice insulates the water beneath it, helping prevent most large bodies of water from freezing solid.

    When Water Well Drilling, Think About the Product

    See More
  • Waste barrels can add up quickly depending on local rulesâ??and sometimes client preferencesâ??for liquid and solid materials disposal.

    Solids, Liquid Disposal in Environmental Drilling Not a Guessing Game

    See More
  • Bardsley

    Bid Data Tips Help Get Contractors More, Better Drilling Jobs

    See More
×

Dig deeper into the drilling and water supply industry!

Build your knowledge with The Driller, covering the people, equipment and technologies across drilling markets.

SIGN UP NOW
  • RESOURCES
    • Advertise
    • Contact Us
    • Directories
    • Store
    • Want More
    • Classifieds
  • SIGN UP TODAY
    • Create Account
    • eNewsletters
    • Customer Service
    • Manage Preferences
  • SERVICES
    • Marketing Services
    • Reprints
    • Market Research
    • List Rental
    • Survey/Respondent Access
  • STAY CONNECTED
    • LinkedIn
    • Facebook
    • YouTube
    • X (Twitter)
  • PRIVACY
    • PRIVACY POLICY
    • TERMS & CONDITIONS
    • DO NOT SELL MY PERSONAL INFORMATION
    • PRIVACY REQUEST
    • ACCESSIBILITY

Copyright ©2025. All Rights Reserved BNP Media.

Design, CMS, Hosting & Web Development :: ePublishing

The Driller
search
cart
facebook twitter linkedin youtube
  • Sign In
  • Create Account
  • Sign Out
  • My Account
The Driller
  • NEWS
    • Water
    • Geothermal
    • Construction
    • Environmental
    • Mining
    • All Industry News
  • CLASSIFIEDS
  • EQUIPMENT
    • Rigs & Heavy Equipment
    • Consumables
    • Pumps
    • Featured Products
  • SAFETY
  • VIDEOS
    • Newscast
    • Drill Talks
    • Ask Brock
    • Emerging Drillers
  • EDUCATION
    • Drilling Business Insights
    • Reference Desk
    • Sponsored Insights
  • SOURCEBOOK
  • EVENTS
    • Conferences & Demo Days
    • Newscast LIVE
  • SUBMIT
    • Drillers @Work
  • ABOUT
    • Contact
    • Advertise
  • SIGN UP