A piling rig carried on a barge comprises a first leader boom adapted for pivotal\nmovement in a plane parallel to said barge; means for rotating the first leader boom\nbetween a substantially horizontal position and an upright position; a second leader\nboom supported by said first leader ...
Damping structure operatively associated with the reaction body interacts with the water in which the tool is submerged using the inertia of the water to resist upwards movement of reaction body.MATTHEW JONESGEERT JONKERSPATRICK BERMINGHEMPETER NEDDENDORP...