Standard and parameter of C series drill pipe boot bit
NO.	Standard	Outer diameter (mm)	Inner diameter (mm)
1	NC	75.3	60.2
2	HC	92.0	76.2
3	PC	117.6	99.7
4	SC	143.5	124.5

Standards and Parameters of W Series Casing Shoe Bits
NO.	Standard	Outer diameter (mm)	Inner diameter (mn)
1	AW	59.5	48.2
2	BW	75.3	60.2
3	NW	92.0	76.2
4	HW	117.6	99.7
5	PW	143.5	124.5
6	SW	172.5	152.0
7	HWT	117.6	99.7
8	PWT	143.5	124.5

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

Reamer

None

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None

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