Reboring of Tubewell near CBA lake, RHA Parade.

Amount

Drilling 608.0mm dia Bore by hydraulic Rotary Drilling ( Reverse Circulation Method Generally according to ISI specification No. IS:2800/1991 (part-I) as amended up-to-date: (a) Drilling from 00 to 350 meters below ground level:

Supplying & lowering 323mm outer dia ERW steel pipes as IS:4270-1992 as amended up-to-date duly ISI marked for housing & blind pipes in 4 to 7 mtrs. Random length with 88.90 mm of threaded ends(8 threads to an inch or 25.4mm) manufactured out of 8.00 mm thick M.s. plates with required NOs. of sockets 177.8mm width inside threads to match the pipe( Length from 0 to 120 meters below ground level). Make : Jindal/TATA steel

Supplying & Lowering 219.10 mm outer dia ERW Steel Pipe as amended up-to-date duly ISI marked screwed both Ends made out of 8 mm thick M.S. plate in random length with 76.20 mm of threaded ends with sockets TATA/Jindal

Supplying & lowering 219.10mm thickness 8mm o/d stainless steel cage type’V” wire wound screen confirming to IS 8110-2000, IS: 4270-92 and composition of material specification grade as per IS: 1012 of having slot size 0.75 mm with o/d 219.10mm equivalent thickness 6.62 tensile load 14 ton 2 ones and ring thickness 8mm slot opening 1 mm open area 25%. The wrapping wire having a :V” shaped wedge profile wire with flat surface on the outside. Make Johnson

Supplying & packing graded Gravel of size as per ISI:4097-189 as amended upto date:

Provision & fixing in position suitable Bail Plug with Hook of 323 mm as per IS:226-1975 as amended up to date

Supplying & fixing threaded M.S. well Cap for 323.00 mm outer dia M.S. Pipe as per ISI:226-1975 as amended up to date

Supplying, Fixing & Lowering Reducing Socket as per IS:226-1975 as amended up to date 323.00 mm x 219.10mm o/d

323.00mm M.S. Clamp as per IS:226-1975 as amended up to date for serving the housing pipe supported in two Girders not less than 100mm x 150 mm and two meters long.

Development by Air Compressor capacity 550 CFM

Rates for charging for logging the well by electric logger

Supply & Fixing of 12” dia centre guide

Supply & Fixing of 8” dia centre guide

Supply of sample Box