Abstract: The instant invention relates to a buoy for the installation of underwater equipment, preferably used in equipment associated with petroleum underwater exploration, comprising an outer body, which has a top lid and a bottom lid, passage pipes, which extends internally along the entire length of the buoy, being provided also of a plurality of thrust elements arranged internally, which consist of gas microbubbles with quartz spherical body, vinyl material of closed cells and resin.

Abstract: The instant invention relates to a buoy for the installation of underwater equipment, preferably used in equipment associated with petroleum underwater exploration, comprising an outer body, which has a top lid and a bottom lid, passage pipes, which extends internally along the entire length of the buoy, being provided also of a plurality of thrust elements arranged internally, which consist of gas microbubbles with quartz spherical body, vinyl material of closed cells and resin.

Abstract: A thermal insulation of pipes of a drill pipe riser, the novelty consisting basically in the fact that the thermal insulation comprises several layers around the pipe and between the first layer and the pipe, and between two adjacent layers, there are spaces where sea water penetrates. A thermal insulation system of joint couplings of pipes for a drill pipe riser comprising a tubular segment that circumferentially surrounds the region of the joint coupling and, so that between the tubular segment and the pipes is formed a space where sea water penetrates.

Abstract: A thermal insulation of pipes of a drill pipe riser, the novelty consisting basically in the fact that the thermal insulation comprises several layers around the pipe and between the first layer and the pipe, and between two adjacent layers, there are spaces where sea water penetrates. A thermal insulation system of joint couplings of pipes for a drill pipe riser comprising a tubular segment that circumferentially surrounds the region of the joint coupling and, so that between the tubular segment and the pipes is formed a space where sea water penetrates.

Abstract: A clamp is disclosed for use in deep sea oil exploration operations. The clamp includes a pre-formed metallic belt (12) to which a first rigid metallic curve (13) is welded. The rigid metallic curve reinforces and protects the anchorage housing of an electro-hydraulic hose which is secured by the clamp. The belt (12) further includes a second rigid metallic curve (14) to reinforce and protect an electric cable which is secured by the clamp. The belt includes rigid symmetrical forks (15) and (16) that are welded in the rotation area of screws that serve to tighten the clamp. The clamp includes a body made of vulcanized rubber having three tips (26), (27) and (28), which are formed at equidistant angles of 120°. The clamp body includes a larger bore hole in the center (17), a medium bore hole in half oblong form (9) in the tip (27), a small bore hole in half oblong form (8) in the tip (26), and a bore slot (18) in the tip (28) suitable for the opening and closing of the clamp (1).