Shenlong's non-magnetic drill collar products include non-magnetic drill collar and non-magnetic stabilizer. The material is chrome manganese stainless steel. High quality is achieved by two process.

First, material choicing , when steel making , phosphorus and sulfur are strictly controlled. Professionally forging techniques assure the mechanical properties meet with the API standard.

Second, material choicing, All material have been ultrasonic tested within the whole length to make sure there is no crack inside.We offer square and hexagonal kelly. Kellys are available up to 14m long.