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Nm=ty of:gluing vtemoas as i cc=uues .or:nstaumg �„vt_ wcus ut of <br /> '"Ise �► <br /> ?eciut-a Ottres&ilido Tea4 1.1 *iE�v5 <br /> tfdn>e <br /> Z 111213 1 A! <br /> Previous <br /> iwoaei X03 cMT Ge* a Quote, Download Datasheet, GO-710 Related :_;rK <br /> Muldievei System <br /> Summary of Drilling Metchods & Tschniques for installing CMT wells in 13nconsolidated Aquifer <br /> I II <br /> Drilling Pre.?erred C.M7 <br /> method Advantages Installation Comments <br /> Technique <br /> Sonic Advancing casing Piace CMT tubing Into I Depths up to 300 feet I� <br /> f during drilling casing with anchor Use casing with an i <br /> I minimizes plate attached to inside diameter(ID) <br /> redistribution of bottom of tubing. Use of at least 4 inches, <br /> ontaminants in tubing centralizers to j Addition of water tc <br /> borehole. Steei casing I canter tubing inside t casing may be I <br /> prevents borenoie of sonic casing.Add i needed to prevent <br /> from collapsing as alternating lifts of I heaving as casing <br /> CMT weil is being sand and bentonite removed- <br /> built. <br /> emovedbuilt.Vibrating casing pellets', as casing is <br /> during:emoval withdrawn, either by <br /> reduces likelihood of gravity p{acament, <br /> bnaging annular j tremie methods or <br /> materiais. I using the Solinst <br /> Sand Bentonite <br /> Injector. <br /> Hollow stem Rigs widely available. Placa CMT tubing Generally limitea to I <br /> auger (FSA) Augers proviae with anchor plate into depths of ! <br /> temporary casing that borehole inside of approximately 1100 <br /> can be withdrawn as hollow stem augers. feet.Water may need <br /> CMT well is -add alternating lifts of to be added to augers <br /> constructed. bentonite pellets and to counteract heaving i <br /> sand pack from sand conditions. Jse <br /> surface as augers are augers with at leas:a <br /> removed. CMT tubing 4-incn internal <br /> centralizers may be diameter(ID). <br /> needed to keep <br /> annuiar space open <br /> during well i <br /> iconstruction. <br /> I <br /> Direct push Rigs are widely Insert CMT tubing into Best for shallow <br /> DP? available. DP casing, then installations where <br /> withdraw casing. sand collapses <br /> around CMT tubing. <br /> May be difficult to <br /> trerrtie sand and <br /> i bentonite due to <br /> small annular space <br /> between CMT tubing <br /> and DP casing. <br /> I <br /> Air rotary Casing arevems Place CMT tubing into Selec casino with at <br /> with casing borenoie from casing with anchor least a 4incn ID. <br /> advance I collapsing as CMT plate.CMT tubing Addition of water <br /> well is tieing built. centralizers should be commonly needed to <br /> �l Consistent-diameter i usea to center tubing prevent heaving as <br /> nim:;/www.solinst.com/Prod/403/a0'addbru 40'SOP.hmsi 4/5/02 <br />