A Guide To Water Well Casing and Screen

A Guide To Water Well Casing and Screen - A Guide To Water...

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A Guide To Water Well Casing and Screen Selection A Note About Roscoe Moss Company Roscoe Moss Company , publisher of this guide, has been engaged in the development of ground water since the 1890's. Originating as a water well drilling contractor operating in the Southwest, the firm has constructed thousands of wells throughout the United States and in ten foreign countries. In 1926, Roscoe Moss began the manufacture of water well casing and screens. Emphasis on the development of these products has brought the company to the forefront of specialists in the marketing of these materials. Completing its uniqueness as a firm engaged in all phases of ground-water development, Roscoe Moss has an active interest in two large California water utilities serving 1.8 million people. Included in their supply sources are over 500 high capacity water wells. The material contained in this pamphlet is in based on a broad practical knowledge of water well design, construction, operation and maintenance, as well as steel products manufacture. These resources are enhanced by an ongoing systematic research and evaluation program. We are pleased to share the information following, some of which represents proprietary company knowledge and has never before been published.
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A Guide To Water Well Casing and Screen Selection Table of Contents 1.0 .. INTRODUCTION . .............................. …....................................................... 4 2.0 METHODS OF WELL CONSTRUCTION . ..…. ........................................... 6 2.1 Cable Tool . ............................................... …...................................... 6 2.2 Rotary . ...................................................... …...................................... 7 3.0 GENERAL CASING AND SCREEN CONSIDERATIONS AND MATERIALS 9 3.1 Strength and Durability . ..................................................................... 9 3.2 Handling and Maintenance . ............................................................... 9 3.3 Economy . .................. …..................................................................... 10 3.4 Steel . ..................................... …......................................................... 10 3.5 Non-Ferrous Materials. .............. …..................................................... 10 4.0 MANUFACTURING PROCESSES AND END USE COMPARISONS . .... 11 4.1 Electric Resistance Welded . .............................................................. 11 4.2 Seamless . ............................ …........................................................... 11 4.3 Press Formed . ......................... …........................................................ 12 4.4 Fabricated . .................................. ….................................................... 12 4.5 Spiral Weld . .................................. …................................................. 12 4.6 Corrosion . .......................................................................................... 13 4.7 Dimensions . ........................................................................................ 13 4.8 Availability . ........................................................................................ 14 4.9 Substandard Pipe . ........................... …................................................ 14 5.0 CASING REQUIREMENTS . ........................................................................ 15 5.1 Diameter . ..................................................................... …................... 15 5.2 Wall Thickness . .................................................................................. 16 5.3 Corrosion Resistance . ......................................................................... 18 5.4 Conductor Casing . .............................................................................. 20 6.0 WELL SCREEN REQUIREMENT . ............................................................... 21 6.1 Aperture Size and Internal Design . ..................................................... 21 6.2 Economy . ............................................................................................ 21 6.3 Entrance Velocity . ............................................................................... 21 6.4 Maintenance and Future Contingencies . ............................................. 22 7.0 SCREEN DESIGNS . ....................................................................................... 23 7.1 Torch Cut Slots . .................................................................................. 23 7.2 Milled Slots . ........................................................................................ 23 7.3 Wire Wrap . ......................................................................................... 24 7.4 Bridge Slot . ......................................................................................... 25 7.5 Shutter Screen . .................................................................................... 25
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8.0 END CONNECTIONS AND ACCESSORIES . .............................................. 27 8.1 Threaded and Coupled . ....................................................................... 27 8.2 Plain Ends . .......................................................................................... 27 8.3 Bell and Spigot End . ........................................................................ 28 8.4 Welding Collars . ............................................................................ …. 28 8.5 Stainless Steel to Carbon Steel Connections . ...................................... 28 8.6 Compression Sections . ........................................................................ 29 8.7 Landing Clamps . ................................................................................. 29 8.8 Casing Guides . .................................................................................... 31 8.9 Float Plates . ......................................................................................... 31 8.10 Diameter Reduction . ......................................................................... 31 8.11 Bottom Plugs . ................................................................................... 32 9.0 APPENDICIES AND TABLES . ..................................................................... 33 9.1 Appendix I - Well Efficiency . ............................................................. 33 9.2 Appendix II - Formation Sampling, Filter Pack & Aperture Size Selection 34 9.3 Appendix III - Analysis of Driving Casing with Cable Tool Equipment 37 9.4 Appendix IV - Water Sampling for Chemical Analysis . .................... 39 9.5 Table A - Head Losses Through Pipe . ................................................ 40 9.6 Table B - Physical Characteristics Blank Casing . .............................. 41 9.7 Table C - Specifications Steel Pipe . ................................................... 43 9.8 Table D - Specifications Steel . ........................................................... 45 9.9 Table E - Conversion Table . ............................................................... 47
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1.0 INTRODUCTION Water has played a vital role in the advancement of mankind. The earliest traces of civilization reveal that
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A Guide To Water Well Casing and Screen - A Guide To Water...

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