Connection and joint piece for well tubes

Connecting and coupling piece (1) for corrugated tubings (2) having an end (6) with an outer shell (10), the connecting and coupling piece comprising:

• a housing (3) comprising a hollow core volume (4), an entry opening (5) for receiving one end (6) of a corrugated tubing (2), a connecting flange (7) and a connecting piece (8) with a pass-through opening (9);
• a sleeve (12) located between the outer shell (10) of the end (6) of the corrugated tubing (2) and an inner shell (11) of the hollow core volume (4) of the housing (3), the sleeve (12) comprising a multipart synthetic material injection molded part;
• the tubing end (6), the sleeve (12) and the housing (3) being fixedly connected with one another;
• a first cylindrical part of the sleeve (12) forming a core sleeve (13), a second cylindrical part (14) of the sleeve (12) covering at least one subregion of an outer shell (33) of the core sleeve (13) and a third cylindrical part (15) of the sleeve (12) covering at least a subregion of an inner shell (34) of the core sleeve (13);
• an outer end region (22) of the core sleeve (13) containing the entry opening (5) and having a plurality of longitudinal slots (23) disposed around the entry opening (5), the core sleeve (13) in the outer end region (22) being divided into a plurality of tongues (24, 25) by the longitudinal slots (23) that are elastically movable in a radial direction, and on at least one of the tongues (25) of the core sleeve (13) at least one outwardly directed blocking lobe (26, 27) with a stop face (40) is disposed;
• and
• wherein the third cylindrical part (15) of the sleeve (12) engages in one piece into the longitudinal slots (23) of the core sleeve (13) and at least partially fill the longitudinal slots (23).