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
MarketsOpinionsWaterWorld According to Wayne

What if a Water Well Doesn’t Clear During Development?

By Wayne Nash
water well development
When contractors plan to gravel pack a large capacity well, they need to know exactly where the producing formation is.
May 1, 2018

A while back, I wrote about gravel packs and well development, but I have had several calls and emails about wells that wouldn’t clear during development. Some of these wells just needed a little more development to consolidate and settle the gravel pack. Usually, more aggressive swabbing and air lift does it, but I have seen wells that didn’t want to clear no matter what we did. On several of these projects, the same problem occurred: screen placement.

When drilling a large capacity well that you plan to gravel pack, you must know exactly where the producing formation is located. A carefully logged and sampled pilot hole is essential. Exact depths will allow you to space your screen and casing properly, and good samples will allow you to select the proper screen-slot size and gravel size. If you plan to produce a single sand, at the bottom of the hole, you should know where the top of the sand is and carefully log the bottom. It is common to drill some rat-hole below the production to allow for slump or cuttings falling in while you are running casing.

Things get a little more interesting when the production is layered sand, clay, sand, etc., all of different thicknesses. Good, careful logging is important. Screens set in a clay formation won’t produce worth a hoot. Since large-diameter, wire-wrapped, stainless steel screens are expensive and you want to maximize production, your well design should only screen the producing zones. Run blank pipe between screens in the clay zones since they won’t produce anyway. With wire-wrapped screens, I use schedule-10 stainless blank. It looks thin, and it is, but it’s still stronger than the screen so it shouldn’t be a problem. When you get the screen, blank, screen, blank assembly in the hole, you change over to whatever casing you have designed. I have seen wells with as many as 20 screens of various lengths, with blank between them, to produce the maximum amount of water. One caveat on this: Some states will not allow you to co-mingle aquifers. But as long as you are producing from the same general aquifer, no problem.

As you can see, this can lead to an interesting math problem. Your drilled depths and your casing tally must line up exactly. We generally do this multiple times to cut errors. If I have an engineer on location, and a geologist, I give them the casing tally and we all figure it independently. If we all get the same numbers, good. If not, you better figure out where the error is before you run casing. Some drillers just screen the entire formation, top to bottom, but this is not really a good practice. First, screens are expensive, and a lot of it will be wasted in non-producing formations. Second, the clay formations behind the screens will cloud the water. Better to blank off the clay.

This has been the most common problem I have seen during development of these wells. Simply put, the screen is in the wrong place. Nearby production will flow up or down through the gravel pack, to some extent, but the clay will cloud the water.

Solutions to this problem, in order of time and money, start with continuing to develop the well. This works if the clay formation is not very water sensitive. You can often develop out the loose clay particles. If this doesn’t do it, consider chemical treatment to stabilize the clay. There are many new and good products on the market that you can jet through the screen to stabilize the clay. So, talk to a good mud engineer.

Click here to read more experiences and find tips for troubleshooting water well problems!

If the well still doesn’t clear, you are going to need to figure out where the cloudy water is coming from. The easiest way is with a camera and test pump. Often, you will find that almost all of the well is producing clear, but a short section of screen just won’t clear. Pump the well while you lower the camera and you will find the problem. Aggressive development and/or chemical treatment in this area will be necessary. Two commonly used methods to blind a screen are either a short, blank liner across the problem area (this works well on deeper screens that you don’t anticipate setting a pump through) or a cement squeeze. This is done by setting a packer above and below the problem area and pumping special cement through the screen to isolate the formation. The cement must be thin enough to pump through the screen slots, but thick enough to still do its job. In cases of very fine screen slot size, you may have to run a casing ripper in and make some holes. One caution: Don’t tear up the screen so badly that you allow your gravel pack to flow into the well. A few holes will work. 

I have done this on several wells with great success. If I can help, call or email me.


For more Wayne Nash columns, visit www.thedriller.com/wayne.

KEYWORDS: water well drilling water well problems well drilling

Share This Story

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

Wayne nash 200px
Wayne Nash is a regular contributor to The Driller. He can be reached at rockbit8@hotmail.com.

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...
    The Underground Network
    By: Jeff Garby
  • Wayne Nash

    Pipe Stuck? Common Causes and Solutions for Drillers

    If you have drilled for any length of time, sooner or...
    Markets
    By: Wayne Nash
  • deep water well

    Selecting and Sizing Submersible Pump Cable

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

Report Abusive Comment

Manage My Account
  • eNewsletters
  • Online Registration
  • Subscription Customer Service
  • Manage My Preferences

The Driller Newscast - The Exit Interview: The Battle of Bron vs. Brock

The Driller Newscast - The Exit Interview: The Battle of Bron vs. Brock

The Driller Newscast: Hard Hats, Hot Topics, and Dad Jokes

The Driller Newscast: Hard Hats, Hot Topics, and Dad Jokes

ClimateMaster’s “Geo Joe” Discusses Industry Growth Through State Organizations

ClimateMaster’s “Geo Joe” Discusses Industry Growth Through State Organizations

The Driller Newscast - The Big, Not-So-Beautiful Bill: How to Lose Clean Energy and Alienate the Planet

The Driller Newscast - The Big, Not-So-Beautiful Bill: How to Lose Clean Energy and Alienate the Planet

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

someone holding a shale rock

The U.S. Shale Boom Hits a Wall

The Driller Newscast episode 149: Hard Hats, Hot Topics, and Dad Jokes

Hard Hats, Hot Takes, and Dad Jokes: Drillers Talk Safety and Geothermal’s Future

A side profile of a coal mine

Interior Approves Bull Mountains Coal Mine Expansion

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

The Driller E.G.O. Award - Enter now!

Related Articles

  • Wayne Nash

    What are Good Well Development Strategies?

    See More
  • Thom Hanna giving presentation at Mountain States Ground Water Expo

    What Does a Hydrogeologist Say About Well Development?

    See More
  • Todd Tannehill

    Tips for Building a Clear-Flowing Water Well

    See More

Related Products

See More Products
  • M:\General Shared\__AEC Store Katie Z\AEC Store\Images\ND\new site\water-and-wastewater-treatm.gif

    Water and Wastewater Treatment: A Guide for the Nonengineering Professional, Second Edition

  • M:\General Shared\__AEC Store Katie Z\AEC Store\Images\ND\new site\water-well-pumps.gif

    Audel Water Well Pumps and Systems Mini-Ref

  • M:\General Shared\__AEC Store Katie Z\AEC Store\Images\ND\new site\modern-well-design.gif

    Modern Well Design: Second Edition

See More Products

Related Directories

  • Koby Environmental Inc.

    Torquer Plugs, J-plugs, H-plugs and the NEW FlushLock plugs, Threaded PVC well inserts, Polymer monitor well manholes, custom molding services.
  • Burgess Well Co. Inc.

    Exclusive Manufacturer of Burgess "EON" Fiberglass Reinforced Plastic (FRP) Well Products, which are customizable to meet each wells design and engineering specifications. Products include water well casings, perforated or continuous slot screen, pump column (drop) pipe, and line shaft oil tube. 1.50" up to 16" I.D.'s, lengths up to 20'.
  • CETCO

    CETCO sets the pace for product research and development. We are committed to bringing you innovative, cost-effective products that go beyond merely meeting your needs. CETCO offers a complete line of high-quality drilling fluids, grouts, sealants, polymers, and additives that will help you maximize your efficiency in the field.
×

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