Specifications

1.square kelly
2.Kellys are the drive section of the whole drill stem
3.2-1/2", 3", 3-1/2", 4-1/4", 5-1/4" 40ft

Kelly

Features:

1.  We can manufacture square kelly and hexagonal kelly as per requirements of customers.

2.  They are made of AISI 4142H-4145H forged or rolled alloy structural steel. Quenching plus tempering thermal treatment will be conducted over the whole length. Its Brinell hardness can reach 285-341 on the basis of such thermal treatment. Charpy impact energy: 54J. The formulated process can ensure that the misalignment of the hole reaches the standard wall thickness.

3. Kelly bars are manufactured according to the technical code API.