Offshore One-column TWO-STEP BASE

摘要

The invention relates to single-line two-stage pile foundations type used for drilling them with sea wells. With the anvil base, connecting its upper and lower tube stages, two hingedly connected to the supporting wing. The wings are made in the form of hollow rectangular boxes, are automatically transferred from the plummet in the horizontal and the lower stage after immersion into the ground bear against its bottom in the bottom of the sea. Since the wings are connected to the side walls projecting below the bottoms of their cheek, mounted on the bottom end stop. Parameters of wings defined conditions of positive buoyancy and non indentation (drawdown) a base into the ground during drilling. Increased reliability and speed stabilize the base with light boats with no additional hoisting and embedding mechanisms, labor costs and time. 1 NC 3 and ZP f ly-4-yl., 1 pr.