Construction of 250 mm dia Gravel Packed Production Tube Well Near Cargo Complex At Srinagar International Airport Humhama.

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Construction of production tube well by way of ; A.Drilling /boring of Pilot bore hole ;-The job includes drilling /boring of a pilot hole in all types of strata of soil i.e. hard /rock /soft/loose boulders etc, up to a depth of max 150 meters. The job shall have to be taken up strictly in accordance with the hydro-geological survey and report is to be appended before the start of the work and execution thereof. The type of well to be constructed shall be strictly in light of the report and consent bt the hydrologist experts and report. The collection of water samples at the requisite depth, shall have to be collected by available means in the best suitable means by the form, as per site requirements. The soil samples are to be collected in plastic boxes with proper labeling. These samples need to be deposited in the divisional office for future reference. Specifications: a) Dia of Pilot hole = 125 mm b) Depth of pilot hole =150 mtrs Max. B. Construction of Production Tube Well :- After successful completion of the pilot bore and positive (within limits) water sample test report , the job is to be continued for construction of a full-fledged production tube well at the same spot by way of the reaming /ODEX method ( in case of hard rock strata if encountered; to be decided by the hydro-geologist in consultation with the departmental experts) to the desired width /size . Broad band technical specification of the pilot hole & production well by and as required by the drilling procedure: Production Well a) Dia of production tube well = 550 mm b) Depth of Production well =150 mtrs (May increase or decrease with condition of requirement report -Method type of Drilling /technique i)By D.C.M/ R.C.M Method ii) By ODEX Method. The construction of production tube well , casing design and the No. of Screen/ length of each screen and positioning thereof shall be the full responsibility of firm/ agency strictly as per the hydro-geologist’s report framed in consultation with the departmental expert/engineer. IS:Code-2800 Part A

Providing, Lowering and fitting of Heavy duty M.S Casing pipe ERW as per relevant IS Codes. The jigs and fixtures for lowering the casing pipe are to be provided by the firm. Providing and fitting of Bail Plug/ Bottom Plug of required dia at the bottom of the Pipe assembly of the the well . Technical Features of Pipe; Min dia of Casing Pipe = 250 mm(as per site design) Length of Each Pipe = 3 Mts Thickness of Pipe = 8.4 mm Max. depth of Pipe = 150 Mtrs Slotted Pipe …….. At appropriate Aquifer Zones Pipe Coating ……. IS Code for Pipe ……. IS-4270:2001 (Grade Fe 410)Third Revision

For 250 mm dia MS Blind Pipe (for 110 Mtrs)

For 250 mm dia MS Slotted pipe (for 40 Mtrs)

Providing and Shrouding of Pea Gravel as per IS : 4097 – 1967, of assorted size around annular space between the casing pipe and the well surface has to be filled with a gravel pack to act as a filter medium. (Quantity shall be subject to the actual measurements at site)

Development of Tube Well :- Development of the Tube well shall be done in accordance to IS :11189 -1985. The Job includes charges on accounts of complete development of the well after completion of drilling/boring and lowering of M.S. Casing pipe and filling of pea Gravel if required (in Case of Artificial gravel pack) .The compressor used should have pressure ratings of 1100 PSI with a delivery of 300 cfm. The job shall include cleaning and stabilization of the well by inserting high compressed Air pressure to remove the suspended /stick/loose material from the casing and in the well bore surface. Development of well by compressor = 04 hrs/mtr of screen. The development has to be carried in presence of in charge site Engineer and as per the expert advice of consultant hydro-geologist if needed. Yield Test:- The job shall also include for carrying out yield test of the well by submersible pumping unit of desired capacity to be decided by the in-charge engineer . All other job’s which have not been specifically specified in the works shall have to be included as required and in accordance with relevant ISBIS codes. The grouting & sealing of the tube well needs to be done to ensure safe sanitary conditions. An apron around the well (mix shall be M10 grade) & slopping away from it to protect the well from pollution has to be constructed to prevent contaminated water flowing back into it. The casing pipe has to be anchored with the apron by welding ISMC-150 steel bracing with crates & sufficient welding area 2 mtrs length each bracing embedded within the apron (4 bracing). The complete well thus is to be handed over to the territorial Mechanical Division for harnessing. Technical Specifications Minimum Run for compressor ….. 04 Hrs/mtr of screen Yield Test for Water (till desired results) … Min 30 Hrs i. Apron Size= 2.5 mtr × 2.5 mtr. ii. Apron depth at skirt = 300 mm. iii. Apron depth at well casing= 350mm

M/s S M ENTERPRISES

Aspire Technologies