Parameters of Core Barrel
Serial Number	Drilling tool standard	Bit OD (mm)	Bit inner diameter (mm)
JS Series Core Barrel
1	JS76	75.3	49.0
2	JS98	98.0	63.5
3	JS122	122.0	80.5
XJS Series Core Barrel
1	XJS77	77.0	46.0
2	XS77	77.0	48.0
CHD Series Core Barrel
1	CHD98	98.0	62.0
2	CHD127	127.0	80.5

Technical exchange

Drilling formation

Bit Selection in Hard Rock Formation

Bit Selection in Soft Rock Formation

Engineering case

Shandong Wendeng-4000m Scientific Drilling Hole

Zila Mountain-super deep horizontal hole drilling

Development and Application Demonstration of 5000m Intelligent Geological Drilling Technology and Equipment

Pre

Universal Standard Core Barrel

None

Pre

None

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