Laserfiche WebLink
. .. _ <br /> <br />ADDITIONAL INFORMATION FOR HOLE 310136-4 <br />7 inch Surface Casing set at 70 feet. <br />After drilling out cement plug, water encountered at 85 feet, hole <br />making about 86 gpm while drilling on air, drill to 1040 feet on <br />air but can not maintain circulation. Hang and cement 150 feet <br />of 5 inch liner from surface to 150 feet to seal off aquifer <br />located from 85 feet to 95 feet. Liner shuts off water completely, <br />hole is drilled to total depth of 1617 feet. Coal zone is cemented <br />with 21 sks of Portland Type II cement, rest of hole is filled <br />with heavy mud and cuttings. <br />