THREADED JOINT WITH HIGH FRICTION AND LOW FRICTION COATINGS (VERSIONS) Russian patent published in 2011 - IPC F16B33/06 F16L15/00 F16L58/02 

FIELD: construction.

SUBSTANCE: threaded joint for pipes (the first version) comprises a rod (100) and a body (200) elements. The rod element has a thread adapted for matching with the body element. The thread shape and the rod and body elements shape are determined by the thread profile, where the thread surface has a coating. This coating contains the first layer (24) with high friction and antiscoring properties, applied onto the whole surface of the rod element (100), and the second layer (25) with low friction properties applied into separate parts of the surface of either only the rod element, or only the body element. The threaded joint for pipes (the second version) comprises a rod (100) and a body (200) elements. The rod element has a thread adapted for matching with the body element. The thread shape and the rod and body elements shape are determined by the thread profile, where the thread surface has a coating. This coating contains the first layer (24) with high friction and antiscoring properties, applied onto the whole surface of the body element (200), and the second layer (25) with low friction properties applied onto separate parts of the surface of either only the rod element, or only the body element.

EFFECT: increased efficiency of the structure operation, its resistance to corrosion.

48 cl, 12 dwg