| 摘要 |
A tool used for diverless replacement of a pipe module (2) forming part of a pipeline system (5, 6) disposed on a bottom plate (1) located on the seabed comprises a supporting plate (29) and a telescopic frame (Figure 3) connectible thereto. The tool is lowered down and placed over the pipe module (2) which is to be replaced by means of a tool carrier. A coupling (33) on the tool engages a gripping head (28) on the pipe module. With the aid of screwdrivers on the tool, clamp couplings (11), connecting the pipe module to pipe ends of the pipeline system leading to said pipe module, are disconnected. The telescopic frame comprises two end plates (52, 53) which, by means of telescopic arms located therebetween, are capable of changing their intermediate distances with the aid of screw jacks. The end plates have internal slots which surround the push lugs on the pipe ends. After the clamp couplings have been disconnected, the pipe ends can be pushed apart by means of the end plates, the pipe module thus being disengaged from the pipeline system and, after the supporting plate and the telescopic frame have been disconnected, is capable of being raised to the surface with the tool carrier and the supporting plate for replacement. When a new pipe module is to be installed, the procedure is reversed. <IMAGE> |
