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Summary of Drillln,Methods &Technifor Installing CMT wells m Unconsolidated fers Page= of <br /> F Y borehole.Prevents In borehole A casing removed <br /> �� • redistribution of alternating Ilfts of <br /> contaminants along sand and bentonite <br /> borehole wall during pellets9 as casing is i <br /> drilling withdrawn,either by <br /> gravity placement, <br /> • tremis methods or <br /> using the Solinst. <br /> Sand Bentonite <br /> Injector <br /> Mud rotary Widely available Place CMT tubing Thin drilling fluid as <br /> directly into borehole much as possible <br /> with anchor plate pnor to installing <br /> attached to bottom of annular materials <br /> tubing.GMT tubing Use a coarse-grained <br /> centralizers should be filter pack.Mud filter <br /> used to center CMT cake can be difficult <br /> tubing in borehole to remove with <br /> Place sand pack and development <br /> bentonite with a methods available for <br /> trernia tube and grout CMT wells. <br /> pump <br /> I Cnated bentonite pellets do not hydrate as quickly, therefore these <br /> pellets are useful for deeper applications, however some coated <br /> pellets give off either ethanol or acetone,and can cause elevated <br /> detection ilmrts of some target compounds Typically,uncoated <br /> peitets are suitable for depths up to 400 ft of water <br /> IN <br /> x. <br /> 1 Home I Products f About I Cantact Us I Papers I Downicacis}Tradeshows Rentals I Links f Espanoi S NEWS 1 Sitemap <br /> !• e <br /> htttp//www solinst.com/Pmd/403/403addon/403SOP html 4/5/02 <br />