Water Well, Mining & Geological Drill Rods

KBJZ is a professional manufacturer of drilling tools, specializing in water well drill rods , mining drill rods and geological drill rods . We adopt seamless steel tube blanks and friction-welded upset joints. Available steel grades include DZ40, DZ50 and R780. Our drill rods are engineered for shallow exploration, medium-deep water well drilling, mining drainage & gas drainage, geological coring and shallow natural gas drilling.

The tool joints are made of quenched & tempered 42CrMo steel with precision machined threads, delivering steady torque transmission, excellent torsion resistance and long fatigue life. Strict concentricity control reduces eccentric wear. Smooth inner bore ensures efficient mud circulation and cuttings removal. Standard sizes are in stock, and custom lengths & thread types are available for importers, drilling contractors and rig distributors worldwide.

Common Available Sizes & Thread Types

• Diameter: Φ42mm, Φ50mm, Φ60mm, Φ73mm, Φ76mm, Φ89mm, Φ102mm, Φ114mm, Φ127mm, Φ140mm
• Wireline coring series: BQ, NQ, HQ, PQ
• Thread connections: NC26, NC31, NC38, NC40, 2 3/8”REG, 2 7/8”REG, 3 1/2”IF
• Standard lengths: 1.5m, 2m, 3m, 4.5m, 6m, custom lengths acceptable
• Steel grade selection guide:
  • DZ40: Shallow water wells, soft soil layers, basic geological reconnaissance, cost-effective option
  • DZ50: Medium-depth water wells, soft to medium rock, shallow mine gas drainage holes
  • R780: Hard rock drilling, deep geological coring, shallow natural gas & coalbed methane drilling, heavy-load drilling

Application Fields

1. Domestic & industrial water well drilling, irrigation wells, potable water boreholes

2. Underground mine drilling, gas drainage holes, mine dewatering holes, mineral exploration sampling

3. Geological survey, geotechnical investigation, core sampling, pile foundation advance drilling

4. Shallow natural gas drilling, coalbed methane drilling, geothermal pilot holes

5. Slope stabilization, anchor bolt drilling, pre-construction geological investigation for highway & infrastructure

Product Features

1. Friction welded upset transition, greatly reducing breakage risk under heavy torque
2. Multiple steel grades for matching different rock hardness and drilling depth
3. Nitrided thread surface for high wear resistance, reliable sealing and repeated make-up & break-out
4. Full inspection for straightness, dimension and weld flaw detection before shipment
5. OEM & bulk manufacturing available, custom threads supported; matched with PDC bits, core barrels as complete drilling sets