Details: geological survey charges to locate the suitable borewell point as directed by the departmrntal officers etc complete. drilling of borewells anywhere in tamilnadu including transportation from one place to another with in tamilnadu in alluvial soil sedimentary strata of clay and sand stone shale pebbles boulders etc. by first taking a pilot bore of 140 mm/150mm dia and then enlarging to required dia direct or reverse rotary mud circulation method using rotary rigs, fuel, labour and drilling bentonite and water required for drilling at site ( site will be shown by the twad board officers) including construction of mud pit. (up to 60.00 mts from gl) above 60.00 mts up to 90.00 mts from gl above 90.00 mts up to 120.00 mts from gl reaming from pilot bore from 150 mm to 300 mm size bore upto 60m depth below on (above 60.00 mts up to 90.00 mts from gl) above 90.00 mts up to 120.00 mts from gl supply & of 150mm dia pvc borewell blue casing pipe with isi specification as directed by thed
Sector: RDPR