Method and installation for carrying out operations under water with a crane on a fixed pontoon
OwnerBoudewijn Gabriël Van Rompayinventor
Life of this patent
Estimating the term…
Abstract
Method for carrying out operations under water by means of a crane (3) equipped with a tool which is erected on a pontoon (1) which has been fixed and which can be jacked up, wherein an underwater working room (4) which is mainly open at the bottom is let down on the place of work, in that the water is pushed out of this working room (4) by means of compressed air, in that the place of work is divided in compartments in the working room (4) itself, i.e. out of the water, and in that one or several positions of the compartment division in which the crane (3) will have to carry out an operation are transmitted to the crane (3), after which the underwater working room (4) is lifted and the crane carries (3) out the operation.
Claims12
A method for carrying out operations related to a work site underwater comprising the steps of:
- providing a first pontoon having a crane equipped with a tool;
- providing an underwater working room generally open along a bottom surface, said working room divided into a series of compartments;
- lowering said working room above the work site;
- removing water from said working room with compressed air;
- lowering said tool into the water;
- calibrating the position of the crane with respect to at least one point within one of said compartments;
- raising said working room from said work site towards the water surface;
- and
- carrying out an operation with said crane related to said work site.
An installation for carrying out an operation underwater comprising:
- a first pontoon supported by at least two extensible legs adapted to be installed into an ocean floor;
- a second pontoon supported by at least two extensible legs adapted to be installed into an ocean floor;
- a numerically controllable crane supported by said first pontoon, said crane including retractable arms having a tool positioned at a distal end of one of said arms;
- an underwater working room;
- and
- a vertical guide supported by said second pontoon for transporting said working room between said second pontoon and an underwater work site, said second pontoon further including an air compressor device for transporting compressed air to said working room.
Dependencies are inferred from the claim text.