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4-5-4
Designed for water well and HDD drilling, high compressive strength, medium hard and abrasive formations, such as limestone, dolomite, sandstone, chert, etc.
The shirttail of lug is protected by cemented carbide insert, the lug back is protected by welded wear-resisting carbide and ogive inserts.
IADC code: 617
Bit type: 8 1/2” DHV617XT
Bearing type: Journal bearing/Flat rubber sealing ring
Circulation type: Mud
Cutting structure:
Inner rows: Wedge
Outer rows: Off-wedge
Bevel row: Flat
Protection row: Wedge
Pin connection: 4 1/2” REG
Bit diameter: 216 mm
Bit weight: 38 kg
During normal drilling, weight on bit and rotation speed cannot be used at the same time:
Weight on bit: 0.5~1.05 kN/mm
Rotation speed: 40~80 r/min
Mineral resources are the material basis for the development of human society and the focus of the game in the world. The distribution of global
With the annual national day coming, Shareate is about to have an eight-day holiday, and this year's holiday has been extended by one day because
To make it easier for drillers to describe the rock bit they want, use the IADC classification codes.The IADC bit classification is a system in
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