Método e aparelho para tensionar elementos tubulares

"MéTODO E APARELHO PARA TENSIONAR ELEMENTOS TUBULARES". é provido um aparelho para manter um elemento tubular sob tensão, o elemento preso e se estendendo entre um primeiro e segundo conjuntos fixos. O aparelho compreende um segundo conjunto tubular disposto concentricamente com relação ao primeiro conjunto tubular e longitudinalmente móvel com relação ao primeiro conjunto tubular. Dessa forma, o segundo conjunto tubular pode ser colocado sob tensão movendo-se sua segunda parte engatável longitudinalmente com relação a sua primeira parte engatável, quando a primeira parte engatável é engatada com o primeiro conjunto fixo. é descrito um método para firmar um elemento tubular, junto com uma ferramenta para instalar o aparelho. An apparatus for securing a tubular member under tension is provided, the member secured to and extending between a first and second fixed assembly. The apparatus comprises a first tubular assembly connectable at a first region to the tubular member to be tensioned and a second tubular assembly having a first and a second engageable portion, the second tubular assembly being arranged concentrically with respect to the first tubular assembly and movable longitudinally with respect to the first tubular assembly. A first engagement assembly is provided for engaging the first engageable portion of the second tubular assembly with the first fixed assembly, such that movement of the second tubular assembly toward the tubular member to be tensioned is prevented. A second engagement assembly is provided for engaging the second engageable portion of the second tubular assembly with the first tubular assembly upon longitudinal movement of the second engageable portion of the second tubular assembly with respect to the first tubular assembly toward the tubular member. In this way, the second tubular assembly can be placed under tension by moving its second engageable portion longitudinally relative to its first engageable portion, when the first engageable portion is engaged with the first fixed assembly. A method for securing a tubular member, together with a tool for installing the apparatus, is also enclosed.