| 摘要 |
<p>A mobile, offshore, jack-up, marine platform, adjustable for sloping sea floor having a mat, a multilegged column pivotally connected thereto and a work platform slidably mounted on the column. Means are included for independently vertically adjusting at least one leg and for selectively cantilevering a drilling unit on the work platform, with offset ballasting of the work platform.</p> |
