| 摘要 |
<p>Method and apparatus for lowering and positioning a pipe line onto the bottom of deep water, the pipe line being assembled from pipe sections on deck of a ship, which pipe line from the bottom of the water extends upwardly according to a curved path (18) followed by a straight portion (17) and finally by a second curved part, the pipe line being held under tension by the ship to maintain the radius of curvature (R) sufficiently large tensioning is performed from the ship directly on the rectilinear part (17) of the pipe line while above the point of engagement of the tensional force the pipe line is subjected to a bending moment only. The apparatus preferably has a rotatable tube (2) in the ship through which the upper part of the pipe line extends vertically upwardly into a derrick (15) for assembling purposes. The ship has below the hull a horizontal outrigger (3) with a travelling crab (4) with cables (16) of tackles (4) running to clamps (5, 6) which in turn can hold the pipe line ( 17, 18) and further an angle lever system (7, 8) with pipe line guide elements (10) and a bending device (11).</p> |
