PDC drill bit IADC code table

Type of Bit Body		Geological Formation Type		Cuting Ctructure		Crown Shape
Code	Character Description	Code	Character Description	Code	Character Description	Code	Character Description
M	Matrix body	1	Very soft-Highly drillable formations such as clay, marl, gumbo and unconsolidated sands.	2	PDC cutter，19 mm to 13 mm (including 19 mm)	1	Short Fishtail
S	Steel body			3	PDC cutter，13 mm to 8 mm (including 13 mm)	2	Short Profile
D	Diamond			4	Less than or equal to 8 mm	3	Medium Profile
		2	Soft and soft sticky-Highly drillable formations such as clay, marl, gumbo and unconsolidated sands.	2	PDC cutter，19 mm to 13 mm (including 19 mm)	4	Long Profile
				3	PDC cutter，13 mm to 8 mm (including 13 mm)
				4	Less than or equal to 8 mm
		3	Soft-medium-Low compressive strength sands, shales and anhydrites with hard layers intermixed.	2	PDC cutter，19 mm to 13 mm (including 19 mm)
				3	PDC cutter，13 mm to 8 mm (including 13 mm)
For example				4	Less than or equal to 8 mm
Code	Character description	4	Medium-Moderate compressive strength sand, chalk, anhydrite and shale.	2	PDC cutter，19 mm to 13 mm (including 19 mm)
S	Steel body			3	PDC cutter，13 mm to 8 mm (including 13 mm)
4	Medium			4	Less than or equal to 8 mm
3	PDC cutter，13mm	5	non
4	Long Profile	6	Medium hard-Higher compressive strength with non or semi-sharp sand, shale, lime and anhydrite.	1	Natural diamond
				2	TSP
				3	Blending cutters
		7	Hard-High compressive strength with sharp layers of sand or siltstone.	1	Natural diamond
				2	TSP
				3	Blending cutters
		8	Extremely hard-Dense and sharp formations such as quartzite and volcanic rock.	1	Natural diamond
		8		4	Impregnated diamond

Tricone drill bit IADC code table

Bit Series	Geological Formation Type			Bearing Type of the Tricone
	Series	Hardness of rock formation	Further rock formation	Standard roller bearings	Air cooled bearings	Open bearing with gauge protection	Standard sealed roller bearings	Sealed roller bearing with gauge protection.	Standard sealed journal bearing	Sealed journal bearing with gauge protection
	Series	Hardness of rock formation	Further rock formation	1	2	3	4	5	6	7
Milled Bit	1	Very soft-Highly drillable formations such as clay, marl, gumbo and unconsolidated sands.	1
			2
			3
			4
	2	Soft and soft sticky-Highly drillable formations such as clay, marl, gumbo and unconsolidated sands.	1
			2
			3
			4
	3	Soft-medium-Low compressive strength sands, shales and anhydrites with hard layers intermixed.	1
			2
			3
			4
Insert Bit	4	Medium-Moderate compressive strength sand, chalk, anhydrite and shale.	1
			2
			3
			4
	5	Medium hard-Higher compressive strength with non or semi-sharp sand, shale, lime and anhydrite.	1
			2
			3
			4
	6	Medium hard-Higher compressive strength with non or semi-sharp sand, shale, lime and anhydrite.	1
			2
			3
			4
	7	Hard-High compressive strength with sharp layers of sand or siltstone.	1
			2
			3
			4
	8	Extremely hard-Dense and sharp formations such as quartzite and volcanic rock.	1
			2
			3
			4

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PDC drill bit IADC code table

PDC cutter，13 mm to 8 mm (including 13 mm)

Tricone drill bit IADC code table

Bearing Type of the Tricone

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