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
