Долота

Bit application chart
Bit applications	MD	MiniMD	KHD	YC	HJ/HJT	GJ/GJT	HA/HAT	GA/GAT
High RPM	●	●				●
High temperature	●	●			●	●
High WOB					●
Highly abrasive	●	●			●
Slim hole		●		●		●
Hard formaction-medium & low RPM					●
Hard formaction high RPM	●	●
Common formation	●	●	●	●	●	●	●	●

Bit structure features
Bit applications	MD	MiniMD	KHD	YC	HJ/HJT	GJ/GJT	HA/HAT	GA/GAT
Journal bearing				●	●		●
Roller bearing			●			●		●
Floating bearing	●
Bushing bearing		●
Roller-journal bearing	●
Metal face sealed	●	●			●	●
Non-sealed bearing			●
Rubber O-ring sealed			●	●			●	●
Enhanced gage protection	●	●