Details: 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/200mm 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. (a) upto 60 mt. depth ending below ground level (b) from 60 m upto 90 m depth ending from gl reaming 140/150/200mm dia pilot bore to 300mm dia bore as directed by the twad board officer. (a) upto 60 mt. depth ending below ground level (b) from 60 m upto 90 m depth ending from gl supply of the following casing pipes of isi approved quality with wall thickness not less than 7.5mm to 8.5mm with pvc couplers and cement paste etc. complete and including packing the annular space with
Sector: RDPR