STRUCTURAL CONNECTION BETWEEN SWIVELS IN SWIBEL STACK

摘要

A structural connection (3) between cylindrical housings of a swivel stack (10) is disclosed. A connector female half (6) is welded or machined to one end of a cylindrical housing of a product swivel (1). A pin male half (5) is welded or machined to an end of another product swivel (1) or a base member (2). An installation tool (7) pulls the pin (5) and box (6) together, radially expands the box (6), and then shrinks the box (6) onto the pin (5) so that non-helical engaging threads (20) wedge together to produce axial tension in the connection (3). The connection (3) is structurally strong enough to act as a structural connection (3) between product swivels (1).