A CASING PIPE, A CASING PIPE ARRANGEMENT, A CASING SHOE, A TOOL ARRANGEMENT HAVING A CASING SHOE, AND A DRILL ARRANGEMENT

摘要

The disclosure relates to a casing pipe with a first and a second attachment means being friction welded to the rest of the casing pipe. An outermost groove element (2a) of the first attachment co-operates with an innermost shoulder (3a) element of the second attachment means, while an innermost groove element (2c) of the first attachment means co-operates with an outermost shoulder (3c) element of the second attachment means. The groove elements (2a, 2b, 2c) on a first end portion have effective dimensions (Da, Db, Dc) which decrease towards the respective side end. The shoulder elements (3a, 3b, 3c) on a second end portion have effective dimensions (Da, Db, Dc) which increase towards respective side end. The grooves and shoulders may be provided as an opposite arrangement. A casing pipe with two first or second attachment means, and a drill arrangement are also disclosed.