perfected protection device for pipe coating of the wells, and in particular for the extraction of oil wells

摘要

A sealing cover for preventing ingress of fluid between water- engaging screw threads of an impact protection nipple (3) and e.g. the end (51) of a pipe (1), comprises a closure portion (4) for closing an end of the nipple (3) and a ring portion (30, 31) for sealingly engaging the outer surface of the pipe and connection to the closure portion (4). The ring portion is constructed as separate or articulated parts (30, 31) so that it can be assembled and secured around the pipe (1) without the need to remove the nipple (3) and closure portion (4) from the end of the pipe. IMAGE