Specifications
Square drill kelly offer the following package: Seaworthy, Steel shelf, Iron Pallet. all package will be packed in plastic bagsWe can manufacture square kelly and hexagonal kelly as per requirements of customers.
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.
Kelly bars are manufactured according to the technical code API.
