Water Well Journal

January 2016

Water Well Journal

Issue link: http://read.dmtmag.com/i/617280

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Page 5 of 67

First UP TIME FOR THE CASING A crew from Dos Palos Well Drilling prepares to install casing after reaming a 510-foot, 14¾- inch borehole at a feedlot on a farm in Dos Palos, California, which is in the central region of the state. Shown is 500 feet of 8-inch PVC well casing with 200 feet of centralized screen to go at the bottom. The 8-inch casing starts out as 200 feet of centralized SDR21 slotted .032 solvent weld with a PVC 40 dome cap at the base. The centralizers are made from 2-inch PVC bells or cou- plings and all stainless hose clamps. After that there is 140 feet of SDR17 Certa-Lok followed by 80 feet of SDR21 and then 80 feet of SDR26 at the top, both solvent weld. The annular space is sealed to 280 feet with ben- tonite grout. The casing is thicker walled as the depth increases due to increasing external hydraulic collapse pressures. Photo submitted by Michael J. Merriman of Dos Palos Well Drilling. First Up is a page of Water Well Journal that showcases—you! Please send in photos and brief descriptions and you just may be "first up" in an issue of WWJ ! And remember, if your photo is selected for the cover of WWJ, you'll receive $250. If your photos are selected, you will be asked to fill out a photo disclaimer form that grants the National Ground Water Association the royalty-free right to display the photos. Please send high resolution digital photos to tplumley@ngwa.org. 4 January 2016 WWJ waterwelljournal.com

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