| 摘要 |
A drilling rig for the offshore industry, has a jack-up platform (2) on which a cantilever (1) is mounted so as to be movable horizontally and in a first direction (B), whereby the cantilever (1) can project outside the jack-up platform (2). The cantilever is also movable relative to the jack-up platform (2) in a second direction (A). A drilling platform (3) is removably mounted on the cantilever and can thus be moved to allow drilling in any point of a rectangle formed by the movement of the cantilever. This arrangement obviates uneven loading on the rails of the cantilever if the drilling platform is movable laterally thereon. |
