... 1.API 5CT 2.Para tuberia de produ,entubacion,perforacion.composite thread protectors are used to protect OCTG end during ... tubing ends and prevent water, dust, corrosive agents, UV rays and other elements to reach the thread area.Characteristics:The composite ... , which prevents the intrusion of the foreign particles. The composite design of the protectors (steel shell and high density polyethylene ...