| 摘要 |
A slide joint (10) for a riser (16) between a well and a floating petroleum installation, e.g., an oil platform, comprising an outer pipe (12) and an inner pipe (11), which pipes are adapted to move telescopically relative to one another to compensate for changes in the distance between the sea bed and the platform. The inner pipe (11) is connected to a piston (27), which piston is responsive to actuation by hydraulic pressure in order to provide tractive force on the riser (16). The outer diameter of the inner pipe (11) is adapted to the diameter of the outer pipe (12) so as to form an annulus (25) between the pipes. The piston (27) is fixedly connected to the inner pipe (11) at or near the downward oriented end thereof, said annulus (25) above the piston (27) being subjected to hydraulic pressure. Below the piston (27) is provided a protective sleeve (29), which is slidably disposed within the outer pipe (12).
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