Kelly
category:Drill Collar and Drill Stem Accessories
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- Release date:2018/04/23
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Detailed
Size ：2 ½” – 6” Square kelly 3” – 6” Hexagonal kelly
Length：40Ft / 54Ft / 56Ft
Each kelly shall be conduct 4145H full length heat treatment to ensure hardness can reach 285-341HB at 1inch from OD; impact energy more than 54J. Each product shall conduct sleeve gauge test strictly in accordance with API specification.
