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Specifications
1. OD:3 1/8'' ~ 11''2.ID: 1 1/4'' ~ 3''
3. NC23-31 ~ 8 5/8REG
4.Length: 9150 or 9450mm
5.API 7; AISI4145H, SY/T5144
Drill collar
we supply different drill collars and other petroleum equipments, for more details please kindly contact us.
Options:
*Standard:API 7; AISI4145H, SY/T5144 or Non-Standard.
1.Standard size, bores and connections for drill collar.
Connection: NC23-31 ~ 8 5/8REG
OD: 3 1/8'' ~ 11'' (79.4 ~ 279.4mm)
ID: 1 1/4'' ~ 3'' (31.8 ~ 76.2mm)
Length: 9150 or 9450mm
Df: 76.2 ~ 266.7mm
Bending strength ratio: 2.75:1 ~ 2.84:1
2.Spiral size of spiral drill collar.
OD:3 7/8'' ~ 11'' (98.4 ~ 279.4mm)
Depth of cut(A) mm: 4.0+/-0.79 ~ 11.9+/-2.37
Depth of cut(B) mm: 5.6+/-0.79 ~ 8.7+/-1.59
Pitch: 914 ~2037mm
3.Non-maganetic drill collar.
Sel.:NC23-31 ~ 8 5/8REG
OD:3 1/8'' ~ 11'' (79.4 ~ 279.4mm)
ID: 1 1/4'' ~ 3'' (31.8 ~ 76.2 mm)
Length: 9150 or 9450
Bending strength ratio: 2.75:1 ~ 2.84:1
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