초록 ▼

A system and methods for diverless replacement of a functional component installed on a service unit on a sea bottom-based installation is provided. The component is fitted releasably into the service unit as an insert with an externally extending maneuverable part. The replacement is carried out by

A system and methods for diverless replacement of a functional component installed on a service unit on a sea bottom-based installation is provided. The component is fitted releasably into the service unit as an insert with an externally extending maneuverable part. The replacement is carried out by a tool mounted on a remotely operated vehicle (ROV). The invention utilizes ROV supported weight compensation means for compensating the weight of the component in order to maintain the ROV in a substantially neutral buoyancy state during operations. The weight compensating means comprises a separate adapter element having the same weight as the component to be replaced. The adapter element or adapter are equipped to be releasably supported by the ROV tool. The adapter has an upper end and a lower end and a central axis extending therethrough, and a centrally extending throughgoing opening having transverse dimensions larger than the largest transverse dimension of the component. The upper end of the adapter is arranged to be releasably connected to the manipulating tool and the lower end of the adapter is fitted for positioning on the service unit circumscribing the externally extending part of the component.

대표청구항 ▼

[ What is claimed is:] [1.] A system for diverless replacement of a functional component installed on a service unit on a sea bottom-based installation, said component being releasably fitted into said service unit as an insert with an externally extending maneuverable part, said replacement being c

[ What is claimed is:] [1.] A system for diverless replacement of a functional component installed on a service unit on a sea bottom-based installation, said component being releasably fitted into said service unit as an insert with an externally extending maneuverable part, said replacement being carried out by a manipulating tool mounted on a remotely operated vehicle (ROV), said ROV supporting a weight compensation means, said system utilizing the ROV-supported weight compensation means for compensating for the weight of the component in order to maintain the ROV in a substantially neutral buoyancy state during said replacement, said weight compensation means comprising a separate adapter having the same weight as the component to be replaced, said adapter being equipped to be releasably supported by said manipulating tool, said adapter having an upper end, a lower end, a central axis extending therethrough and a centrally extending throughgoing opening having transverse dimensions larger than the largest transverse dimension of the component, the upper end of said adapter being arranged for releasable connection to said manipulating tool and said lower end of said adapter fitted for positioning on the service unit circumscribing the externally extending part of said component.