Research on cutting technology of underwater diamond wire saw

During the maintenance and repair of Seabed oil pipelines which need cut off when they are breakage, and it is very difficult to completion the task with common underwater cutting ways. The experiment of cut seabed oil pipelines has been successfully done with the diamond wire saw which we design and produce independent and come to certain working efficiency. Seabed oil pipelines (which contain concrete balance layer, polyethylene rot-proof layer, polyurethane thermal retardation layer and steel pipe) is a kinds of complex material. For cutting complex material and materials which have irregular form with diamond wire saw is a perfect technique. The paper gives an introduction of constitution and principle of operation about diamond bead wire saw. The experiments of the diamond wire saw for cutting the seabed oil pipelines have finished. We have got all of the information and relation about the technical parameters which contain feed rate override and cutting force, cutting force and cutting speed, the wear rate of diamond bead wire and the feed rate override, the wear rate of diamond bead wire and the cutting speed through analysis and treat experiment records, and create a mathematic mode of cutting force with regression orthogonal experiment. The conclusion that application the diamond wire saw for cutting the seabed oil pipelines is practical and beneficial ways especially in underwater circumstance and special construct condition of seabed oil pipelines.