• Core barrel
    • Core barrel
    • Core barrel

Core barrel

  • Product Model:OD: Φ35mm~Φ219mm;WT:2.0mm~20.0mm;Length:6.0m~12.0m
    Feature Description:
    A section of pipe, which is connected to the upper part of the drill bit to contain and protect the core.
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Detailed Introduction

A section of pipe, which is connected to the upper part of the drill bit to contain and protect the core.

The main materials or grades

ZT380、ZT 490、ZT 520、ZT 540、ZT 590、ZT 640、ZT 740。

Executive standard

GB/T 9808-2008《Seamless steel pipe for drilling》

JIS G 3465-2006《Seamless steel pipe for drilling》

GB/T 16950-2014《Geological core drilling tool》

Product feature

Mechanical property

Grade

Yield strength Rp0.2/MPa

Extension strength Rm/MPa

Elongation A/%

ZT380

380

640

14

ZT490

490

690

12

ZT520

520a

780

15b

ZT540

540

740

12

ZT590

590

770

12

ZT640

640

790

12

ZT740

740

840

10

Notes:a Grade ZT520 measure Rp0.5.

b Tensile specimens of Grade ZT520 adopt S4、S5 or S6 which from GB/T228 standard.

Dimensional accuracy

OD tolerance:-0.5%D~+1.0%D,WT tolerance:-10%S~+12.5%S,Straightness:≤1.0~1.3mm/m

Service environment

This product is mainly used for transmitting drilling power and transporting mud which should have good strength, ductility, tenacity, high wear-resisting, anti-fatigue reverse and corrosion resistance.


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