We offer square and hexagonal kellys. Kellys are available up to 16 meters long. Our kellys are made from AISI 4145H alloy bars that are quenched and tempered full length. A hardness range of 285 to 341 BHN and a minimum impact value of 54 Joules as per ASTM A 370 are maintained one inch bellow the surface at room temperature. To improve resistance to galling, all connections are phosphate-coated with an API thread compound. Each bar used to manufacture kellys has been examined with magnetic particle inspections and ultrasonic inspections.

SLRT, located in China's second largest oil field, with the registered capital of RMB one hundred million, as the first tier supplier network of CNPC and Sinopec in China, we are a API certificated manufacturer and global supplier of quality oilfield equipment to the oil and gas industry.