Vetco Gray Controls Limited

Ge Oil & Gas UK Limited

Gareth Huw Lewis

Andrew Simon Hamblin

Anthony Jason Vangasse

A method of applying acid-wash to a subsea connection assembly, in particular a stabplate connection, in order to remove unwanted material such as marine growth and calcareous deposits. The method consists of inserting a plug, containing channels, into a central in a stabplate connection and injecting acid-wash through the plug. The plug may be carried by an operating tool arm of a remotely operated underwater vehicle (ROV).

Acid injection

A stabplate connection is provided by: providing a first part () comprising a stabplate and carried by an underwater structure; providing a second part () comprising a stabplate carried by tooling (); engaging the tooling with said first part; using the tooling to bring the parts together so the stabplates mate with each other; using the tooling to lock the first and second parts together by engaging a portion () carried by the first part with a portion () carried by the second part; disengaging the tooling from the first part; and removing the tooling from the stabplate connection.

Stabplate connections

A mechanism for clamping first and second stabplates together comprises a pivoted cam member and clamping means for co-operating with the cam member. The mechanism is such that the cam member is displaceable between a first position in which, in co-operation with the clamping means, it clamps the stabplates together and a second position in which it has rotated to be between the stabplates with the stabplates separate from each other.

Growing community of inventors

Bristol, United Kingdom

Gareth Huw Lewis