Underwater Welding with a Local Water Curtain of the Welding Zone

Abstract

The intensive development of oil and gas production in the offshore zone of the seas and oceans determines the necessity of building offshore drilling platforms. Their installation and repair is performed by welding under water, which is carried out by wet and dry methods, which have their own advantages and limitations. One of the promising directions is welding with local protection of the welding zone, when an anhydrous cavity is created surrounding the welding zone. Welding diver is out of protection zone. The method where the shielding of the welding zone is provided by a water jet curtain around the nozzle of the welding torch is well known in international practice. The article presents the analytical review of scientific publications in the field of research of the underwater welding process with a water curtain surrounding the welding torch nozzle. The variables affecting the hydrodynamic parameters of the welding process, the features of the stable arc discharge existence, factors and their numerical parameters that determine the stability of the process and the quality of welded joints are discussed.