| 摘要 |
An apparatus for carrying out operations at a point deep under water comprises a floating device (1) having a suspension system (2) with hoisting means for lowering and raising a line of pipes (3). The hoisting means is combined with a passive and an active swell compensation. To be able to carry out the movements which are necessary for carrying out the operations in conjunction with the swell compensation, especially when a very great weight is suspended from the suspension system and there is no support by the ground to take part of the weight, according to the invention, the derrick (2) of the suspension system has a number of vertical guide tracks (12, 13, 14) disposed at intervals from each other, on which is guided a horizontal yoke (15) which is positioned between the guide tracks and can be moved up and down vertically in the guides by means of driven pinions which engage with a number of pulling elements (17, 18) bearing the load of the yoke and from which the latter is suspended. The hydraulic system of the hydraulic motors (19, 20, 21, 22) contains both the passive and the active part of the swell compensation. There is the possibility of giving vertical movements to the yoke on which the swell compensation is superposed. |
