7/17/2019 DRILL RODS - Technical Specification2

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WIRE LINE HEAT TREATED DRILL RODSTECHNICAL SPECIFICATIONS

Sizes & Weights NMO size HMO size

Outside Diameter 

Inside Diameter 

Weight "3 meter length"

2 ¾ in.

2 in.

50.5 lb

69.9 mm

60.3 mm

22.9 kg

3 ½ in

3 in

75.4 lb

88.9 mm

77.8 mm

34.2 kg

Mechanical Property

Raw material

 Yield Strength (Tubing)

Tensile Strength (Tubing)

Cold Drawn Seamless Precision Tube ASTM A519 Alloy Steel

690 Mpa (100,000 PSI)

813 Mpa (118,000 PSI)

Straightness (Tubing/Rod) 1 mm x 3 meter (Max.)

Thread Specifications

Thread

Thread Hardness

Joint Tensile Strength

Joint Twisting to break 

Type “M0”, Acme modificated 3 TPI (thread per inch)

Quench & Temper

NMO size HMO size

128,000 lbf

8,100 lbf-ft

58.054 kgf

1120.0 kgf-mt

160,000 lbf

12,300 lbf-ft

72.574 kgf

1700.0 kgf-mt

Heat Treatment & Thread Protections

Heat treatment

Thread treatment

Both ends are through heat treatment (Quench & Temper) prior to

 threading (approx. 4 to 6 inch.)

Pin end / Bonded coating providing oil absorptive friction

reducing surface.

Box end / Rust prevention oil.

Packaging

Drill rods bundle are protected with hexagonal steel caps.

Bundle size / 19 pcs. (for N and H size).

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