Product Details

Specifications

1.best quality for 3"~26"
2.high quality, best price
ver all IADC

Recommended drilling parameters of tri-cone rock bits

Rock formation		Bit type	Bit size		Drilling weight	Rotary speed
Rock formation		Bit type	mm	inch	kN/mm	r/min
Very soft	Soft Marl, Clays, Sands, Salts etc.	1	187.3~346.1	7 3/8~13 5/8	441~735	120~50
soft	Clays, Soft Shale, Marl, Sands, Salts etc.	2	95.2~174.6	3 3/4-6 7/8	245-490	100-50
soft	Clays, Soft Shale, Marl, Sands, Salts etc.	2	187.3~346.1	7 3/8-13 5/8	490-784	90-40
Medium soft	Shale, Marl, Sandstone, Soft Limestone etc.	3	95.2~174.6	3 3/4-6 7/8	245-490	80-40
Medium soft	Shale, Marl, Sandstone, Soft Limestone etc.	3	187.3~311.1	7 3/8- 12 1/4	490-784	80-40
medium	Hard Shale, Limestone, Medium/Hard Sandstone etc.	4	95.2~174.6	3 3/4-6 7/8	294-539	80-60
medium	Hard Shale, Limestone, Medium/Hard Sandstone etc.	4	187.3~241.3	7 3/8-9 1/2	539-833	60-40
medium hard	Hard Dolomite, Limestone, Hard Sandy, Rock etc.	5	95.2~174.6	3 3/4-6 7/8	294-539	80-60
medium hard	Hard Dolomite, Limestone, Hard Sandy, Rock etc.	5	187.3~241.3	7 3/8-9 1/2	539-833	60-40
hard	Sandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone etc.	6	95.~-174.6	3 3/4-6 7/8	294-539	80-40
hard	Sandy, Shale, Quartzite, Hard Dolomite, Hard Sandstone etc.	6	187.3-215.9	7 3/8-8 1/2	580-882	60-40
Very hard	Quartzite, Chert, Basalt Granites, Pyrites etc.	7	95.2-174.6	3 3/4-6 7/8	294-539	80-40

Bearing type:sealed bearing and non-sealed bearing

metal sealed journal bearing

rubber sealed journal bearing

cutting structure:The back cone and the teeth all surface is are hardfaced strengthening, improved steel tooth shape and welding materials,showing teeth higher

Application formation:Soft with low compressive strength and high drillability, such as shale, clay, salt bed and etc