landing string as detailed herein the present application design proposes a telescoping thoj which provides an orientation helix for orienting the landing string but which subsequent to landing may be split and telescoped to provide a sealing or shearing surface across the desired bop rams as may be required for subsequent operations in fig1 a 1 d the thoj 1 can be seen in its retracted and extended positions in the retracted position the orientation helix 4 is continuous or substantially continuous in the sense that a pin or other protuberance will be guided along the helix without this helix 4 engages a pin 12 protruding into the interior of the bop 10 pin shown in fig2 a and 2 b to rotate the landing string to the correct orientation as the landing string is lowered until the correct orientation is reached and the bop 10 pin 12 reaches the vertical slot 5 the landing string is then fully landed out with the correct orientation in the extended position the helix 4 is split to expose a ported slick joint 8 against which the bop pipe ram 11 can seal the ported slick joint 8 can have a uniform outer diameter surface adapted for sealing with the bop pipe ram 11 the bop 10 space out is shown in fig2.