A MARINE TENSIONER

摘要

A marine tensioner has a tensioner frame (41) and multiple track units (42) mounted in said frame. Each track unit comprises an elongated chassis (42a), said chassis having end portions at opposed ends thereof as well as a central portion between said end portions Each track unit further comprises an endless track (42b) supported by said chassis and track motion control means for effecting controlled motion of the endless track, the endless track having a multitude of friction elements adapted to engage on the pipeline or the like. Between each track unit and the tensioner frame a connecting structure is provided that at least allows for lateral motion of the track unit so as to adapt the position of the track unit to the pipeline diameter. One or more squeeze actuators (50-52) are provided between the tensioner frame and the chassis of the track unit and actuator control means are provided which are associated with said one or more squeeze actuators and allow to control the squeeze force exerted by the friction elements of the track of track unit on the pipeline.