WBPHED/AE/USD/NIET-08 OF 2025-2026

Site Preparation, Temporary Latrine, Placement & levelling of Rig Machine, Mast hoisting and Casing drilling (Upto 6 mtr.) Placement of Casing with all allied works necessary to commence drilling woks and wind up of all machineries after completion of Drilling.

Transportion cost of drilling equipment and accessories rig machine etc. including cost of fuel , Lubricant & loading unloading the materials from store/stack yard/ suppliers godown and unloading / stacking the same site. ( Upto 60.00 km distance)

Drilling by Direct Rotary method of drilling using 9 7/8” dia.bit for pilot bore follwed by subsequently reaming using 12 1/4” dia. ,15 " dia. and 17.5" dia. Rock Roller Bits/Drag Bits in consolidated, semi consolidated and soft formation up to required depth including casing boring and casing lowering as required including cost of fuels and lubricants etc. as required for drilling. Note: 1)Rate only for pilot drilling will be @ 50%. of item rate. 2)Rate for reaming by 12 1/4 " dia. bit will be @ 14% of item rate. 3)Rate for reaming by 15 " dia. bit will be @ 16% of item rate. 4)Rate for reaming by 17.5 " dia. bit will be @ 20% of item rate Rate only for pilot drilling will be @ 50%. of item rate a) From 6 Mtr. to 60 Mtr.

b) From 60 Mtr. to 90 Mtr.

c) From 90 Mtr. to 120 Mtr.

d) From 120 Mtr. to 150 Mtr.

e) From 150 Mtr. to 180 Mtr.

f) From 180 Mtr. to 210 Mtr.

g) From 210 Mtr. to 240 Mtr.

h) From 240 Mtr. to 250 Mtr.

Supply and delivery of UPVC pipe (CD) conforming to IS 12818:2010. (CIPET Certified) c) 150 mm dia

d) 250 mm dia

Supply and delivery of UPVC Reducer (a) 200 mm X 150 mm.

(b) 250 mm X 200 mm

Supply and delivery of UPVC Cap 250 mm dia

150 mm dia

Supply and delivery of M.S. Housing clamp 300 mm dia

Supply and delivery of M.S .Centre guide (Special Type).

Supply and delivery of Washed gravels size ranging from 1.80 mm to 4.74 mm. conforming to IS 4097 : 1967.

Supply and delivery of Bentonite Powder conforming to IS 6186 : 1986.

Electro-logging charge.

Lowering the tube well assembly (UPVC Casing pipe ,well pipe, strainer along with UPVC accessories) vertically in a position with proper lowering arrangement by applying necessary jointing compound including labour cost for subsequent gravel packing and machine operation cost etc.

Development (Min. 8 Hr. continuous) of tube well by using suitable air compressor (Min. Capacity: 600CFM & operating Pressure 14 Bar) followed by yield testing with BHT pump (Head :45 to 50mtr.,Discharge :1100 to 1000 LPM and 25 BHP engine) all complete including To & Fro Transportation cost and Cost of fuels, lubricants & Labour etc.

Water sample collection and chemical test including Arsenic Test.

Cost of Consumables for drilling rigs and machineries

Supply of 250 mm dia M.S Threaded top nipple suitable for fixing with PVC threaded pipes at the top of assembly upto 3 mtr Length and having 8 mm wall thickness

Supply and delivery of UPVC Deep Well Screen (RDS) Pipes with Ribs conforming to IS 12818:2010 .(CIPET Certified) a) 150 mm dia.

Packing the side of the tubewell housing pipe with puddle clay & with good quality local earth as per direction

Sealing the annualr space around the pipes by balls of Rajasthan Bentonite powder as per direction of EIC

Add GST @ 18%

Add CESS @ 1%

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