FOR DEEP TUBE WELL BORING USING ROTARY RIG AND SUPPLY AND INSTALLATION OF CASING PIPE, RIBBED SCREEN PIPE ETC. COMPLETED INCLUDING SUPPLY AND INSTALLATION OF SUCTION,COLUMN PIPE , IRON REMOVAL FILTER ETC. AT DNPL DESPATCH STATION MADHUBAN, DULIAJAN

DTW Boring Items & including supply of sucction /column pipe, iron removal filter itrms :

Preparation of site for placement of the drilling rig including excavation of mud pit, circulation drain,collection chamber etc. all complete as directed.

Movement of Rig from the Divisional Head Quarter to the drilling site including cost of P.O.L. all complete as directed.

Transportation of all ancillary equipments, camp materials, welding set, rig accessories etc. From Divisional Head Quarter to worksite to and from including cost of P.O.L. all complete as directed. Beyond 100.00 Km distance from Divisional H.Q.

Transportation of all store materials like pipes, strainer, cone, socket, clamp, bentonite etc. from Divisional Head Quarter to worksite to and fro including cost of P.O.L. all complete as directed. Beyond 100.00 Km distance from Divisional H.Q.

Transportation of air compressor from the Divisional Head Quarter to the drilling site with all accessories including cost of P.O.L. all complete as directed. Beyond 100.00 Km distance from Divisional H.Q.

Providing water supply facilities at drilling site all complete as directed. By installing 1 Nos. of Singur hand pump

Boring in soft soil / normal clay / sandy soil by bit of size either 5 5/8" or 6 7/8" or 7 7/8" and collecting sample of soil at every 3.0 m depth or wherever there is a change of strata in sample boxes with the distinguishing marks including arranging and carriage of necessary boring materials / tools / bentonite etc. and withdrawing the drill pipe for lowering well assembly etc all complete as directed

Boring in hard soil / pebble / gravel by bit of size either 5 5/8"or 6 7/8" or 7 7/8" and collecting sample of soil at every 3.0 m depth or wherever there is a change of strata in sample boxes with the distinguishing marks including arranging and carriage of necessary boring materials / tools / bentonite etc. and withdrawing the drill pipe for lowering well assembly etc all complete as directed.

Reboring in soft soil / normal clay / sandy soil by bit of size either 8 1/2" or 9 5/8" or 12" from either 5 5/8" or 6 7/8" or 7 7/8" all complete as directed.

Reboring in hard soil / pebble / gravel by bit of size either 8 1/2" or 9 5/8" or 12" from either 5 5/8" or 6 7/8" or 7 7/8" all complete as directed.

Reboring in soft soil / normal clay / sandy soil by bit of size either 14" or 16" or 18" from either 8 1/2" or 9 5/8" or 12" all complete as directed.

Reboring in hard soil / pebble / gravel by bit of size either 14" or 16" or 18" from either 8 1/2" or 9 5/8" or 12" all complete as directed.

Extraction of drilling pipes / bits against skin friction at the end of each day and after completion of the operation including washing of the bore hole all complete as directed.

Labour charge for sinking, lowering, fitting, fixing in position of 150 mm dia U.P.V.C. pipe assembly comprising of strainer, pipes and cone in potable water bearing strata, washing the bore well etc. and supplying necessary jointing materials including carriage of materials and cleaning and priming the DTW all complete as directed.For 0 to 50 m depth

Labour charge for sinking, lowering, fitting, fixing in position of 150 mm dia U.P.V.C. pipe assembly comprising of strainer, pipes and cone in potable water bearing strata, washing the bore well etc. and supplying necessary jointing materials including carriage of materials and cleaning and priming the DTW all complete as directed.For 50 to 100 m depth

Labour charge for sinking, lowering, fitting, fixing in position of 150 mm dia U.P.V.C. pipe assembly comprising of strainer, pipes and cone in potable water bearing strata, washing the bore well etc. and supplying necessary jointing materials including carriage of materials and cleaning and priming the DTW all complete as directed.For beyond 100 m depth

Developing of the D.T.W. with air compressor, Make- Kirloskar / Cumins all complete as directed.

Supplying and packing pea gravel around the periphery of casing including screening, washing etc. all complete as directed.

Supplying, fitting, fixing MS clamp of size 15 mm thick and 150 mm width having projection of 300mm and three holes of 20 mm dia for clamping the plates by 16 mm dia hexagonal bolts of length 75mm and nuts on both sides encircling the column pipe including two coat of enamel paint over one priming coat of different dia all complete as directed and specified.(a) 150 mm dia.

Supply and intallation of 150mm dia. U.P.V.C. Casing Pipes (IS : 12818/1992) including all necessary fittings completed.

Supply and intallation of 150mm dia. U.P.V.C. Ribbed Screen Pipe (6mm Thick) including all necessary fittings completed.

Supply and intallation of 150mm dia.UPVC End Cap Threaded.

Supplying Bentonite clay (powder) and carriage of materials all complete as directed and specified including Labour charge for providing bentonite clay packing at the time of Reboring boring .

Construction of temporary accommodation and low cost sanitary facility for drilling staff including cost of camp materials viz. cots, tables, chairs, utensils, dresses, safety helmets etc. and dismantling the accommodation after completion of the work all complete as directed.

PIPING, Supplying, fitting and fixing 75mm diameter G.I. suction pipes plain/bevel ended, make:TATA / SAIL (Medium) conforming to relevant IS codes of practice including supplying and fitting of accessories, lowering of assembly pipes concentrically in the casing pipes complete as directed. (Submersible Pump, flat copper cables, Panel , pump starter, CI-adaptor will be provided by Company and Instalation, fiting, fixing will be done by party).

Supplying fitting and fixing check valve (non return valve) of 75mm diameter including thread to pipes.

Supplying fitting and fixing 75 mm dia (Medium) G.I. Pipes of tata make with all necessary 'R' brand or similar approved G.I. Fittings such as bend, tee, elbow, reducer, nipple, plug, long screw fitting, H.W. clamps etc.complete at all levels including below G.L. as directed and specified.

IRON REMOVAL WATER FILTER, Supplying fitting and fixing iron removal filter filling with treated sand, pebbles, manganishdioxide and other required materials of various filtration rate per hour of DOLPHIN make with all necessary fittings such as valve,bib cock,pipe connection etc.with a free maintanance period of six monthhs, With Zoloto fittings, 1000 liters capacity, 6 mm thick Vessel FRP.