Apparatus for use in installing a piece of equipment horizontally on a submerged unit and for removing it therefrom

Apparatus for installing a piece of equipment horizontally on a submerged unit and for removing it therefrom, comprising a receiving structure forming part of the submerged unit, a movable servicing module having a tubular frame defining a longitudinal direction and which is adapted to support said piece of equipment and to come up against the receiving structure with the frame in a substantially horizontal position, said longitudinal direction then being arranged substantially horizontally, complementary catching means on upper parts of said tubular frame and said receiving structure, for permitting said tubular frame, in an inclined position, to catch by means of its said upper part on said upper part of said receiving structure and to pivot relative to said structure to come up against said structure in said horizontal position, controllable interlocking means for locking said tubular frame to said receiving structure, longitudinal slideways provided on said tubular frame, slidable supports mounted on said slideways, a cradle provided with supporting means for supporting said piece of equipment and with bolt-screwing means for bolting said piece of equipment to said submerged unit, connection means between said cradle and each of said sliding supports for permitting transverse adjustment of their relative position, a longitudinal-travel jack for moving said cradle relative to said tubular frame, and complementary mutual engagement means on said submerged unit and on said piece of equipment for centering said piece of equipment on said submerged unit by transverse adjustment of the relative position of said cradle and said sliding supports which is permitted by said connection means.