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Tube for Geological Drilling

Category: Seamless PipeDate: 2022-07-12 share to：
Tube for Geological Drilling
 
Uses
Ground drilling pipe is a steel pipe for geological departments to drill core, mainly including geological drill pipe, geological casing, core pipe, drill collar, active drill pipe and bit.
Tube for Geological Drilling
 
Standard
GB/T 9808 Seamless Steel Pipe for Drilling
YB/T 235 Steel Pipe for Geological Drilling
YB/T 528 Oil Drilling Pipe
YB/T 691 Seamless Pipe for Oil Drill Collars
 
Product Size
Outer Diameter: 73.02mm~219.1mm
Wall Thickness: 6.25mm~20.0mm
Length: 6.0m~12.0m
 
Dimension Tolerance
Deviation of Outside Diameter: -0.5%D~+1.0%D
Deviation of Wall Thickness: -10%S~+12.5%S
Bending Degree: ≤1.5mm/m
 
Chemical Composition (%)
Chemical Composition of Tube for Geological Drilling
Material Grade C Si Mn P S Cu Cr Ni Mo V B
45MnB DZ40
(ZT380)		 0.42-0.49 0.2-0.4 1.1-1.4 <0.04 <0.04           0.001-0.0035
50Mn 0.48-0.56 0.17-0.37 0.7-1.0 <0.04 <0.04            
40Mn2 DZ50
(ZT490)		 0.37-0.44 0.2-0.4 1.4-1.8 <0.04 <0.04            
40Mn2Si 0.37-0.45 0.4-0.7 1.3-1.8 <0.04 <0.04            
45MnMoB DZ60
(ZT590)		 0.41-0.49 0.17-0.37 0.9-1.2 <0.04 <0.04       0.2-0.3   0.001-0.005
42MnMo7 STM-R780
(ZT520)		 0.38-0.45 0.15-0.35 1.55-1.85 <0.025 <0.02 <0.2 <0.3 <0.3 0.15-0.2    
36Mn2V STM-R780-1 0.35-0.4 <0.65 1.3-1.7 <0.025 <0.02         0.08-0.2  
 
Mechanical Properties
Mechanical Properties of Tube for Geological Drilling
Grade Elongation Yield Strength Tensile Strength
DZ40 14 380 640
DZ50 12 490 690
DZ60 12 590 770
STM-R780 15 520 780
STM-R780-1 15 520 780
DZ75 10 740 840
DZ85 10 840 940
DZ95 10 940 1030
 

Tube for Conveyance of Fluid Tube for Gas Cylinder Back