Abstract: A centralizer for tubular elements is provided which includes an inner part formed by a first material having high mechanical performance and chemical stability and an outer part arranged on said inner part, formed by a second material. The second material may be an autolubricating material. The second material may further possess a low coefficient of friction. The second material may additionally possess lower mechanical performance and chemical stability than the first material. A method of manufacturing the centralizer is also provided, including steps of injecting the first material on a tubular element to form the inner part on the tubular element and injecting the second material to form the outer part on the formed inner part.

Abstract: A centralizer for tubular elements is provided which includes an inner part formed by a first material having high mechanical performance and chemical stability and an outer part arranged on said inner part, formed by a second material. The second material may be an autolubricating material. The second material may further possess a low coefficient of friction. The second material may additionally possess lower mechanical performance and chemical stability than the first material. A method of manufacturing the centralizer is also provided, including steps of injecting the first material on a tubular element to form the inner part on the tubular element and injecting the second material to form the outer part on the formed inner part.

Abstract: A thread protector assembly for protecting threads on the exterior end of a pipe as well as the interior. The assembly comprises an open protector and a closing cap that defines a completely closed plug that is engageable from above to cover over the open protector. The open protector has an internal thread and a bumper at an upper end with cutouts for applying a torque. The closing cap also has cutouts and internal ribs to engage the cutouts on the open protector and transmit torque to the open protector.

Abstract: A protector for the ends (2) of tubular elements (1), which comprises: a ring (3) made from a deformable material, wherein the external surface of one of the ends thereof has a conical thread (4); and a threaded cap (6) made from a deformable material, which comprises a closed end (C) and an open end (A), wherein the internal surface of said open end (A) includes a conical thread (5) which matches that of the external end of ring (3). A tubular element (1) which comprises the threadless protector is also disclosed.