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1. WO2020108798 - A SAVER SUB FOR A CONNECTION SYSTEM AND A METHOD OF INSTALLING SUCH A SAVER SUB

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[ EN ]

CLAIMS

1. A subsea fluid flow tubular connection system with an inboard hub (2) in fluid connection with piping of a subsea hydrocarbon exploration or production system and an outboard hub (3), the subsea fluid flow tubular connection system comprising a tubular saver sub (1 ) with an inboard hub connecting portion in sealing contact with the inboard hub (2) at a first end and an outboard hub connecting portion in sealing contact with the outboard hub (3) at a second end.

2. The subsea fluid flow tubular connection system of claim 1 , wherein the tubular saver sub (1 ) has an outer diameter greater than a length between the inboard hub connecting portion and the outboard hub connecting portion.

3. The subsea fluid flow tubular connection system of claim 1 or 2, wherein the tubular saver sub (1 ) is connected to the inboard hub (2) at the first end with an inboard hub clamp (4) and to the outboard hub (3) at the second end with an outboard hub clamp (5).

4. The subsea fluid flow tubular connection system of claim 1 -3, further including a guiding and alignment system with at least one inboard guide (9) with a fixed position in relation to the inboard hub (2) and an outboard guide (14) for each of the least at least one inboard guide with a fixed position in relation to the outboard hub (3) and in guiding cooperation with the at least one inboard guide (9), wherein a space allowed by the at least one inboard guide (9) and the outboard guide (14) for each of the least at least one inboard guide (9) is formed between an end of the inboard hub (2) and an end of the outboard hub (3) to allow room for the tubular saver sub (1 ).

5. A method of installing of a cylindrical saver sub (1 ) of a subsea fluid flow tubular connection system to installed subsea equipment comprising:

installing the cylindrical saver sub (1 ) to a hub (3) of an element to be connected to a hub (2) of the installed subsea equipment;

lowering the cylindrical saver sub (1 ) on the hub (3) of the element to be

connected to the hub (2) of the installed subsea equipment; and

connecting the cylindrical saver sub (1 ) to the hub (2) of the installed subsea equipment.

6. A method of exchanging of a worn cylindrical saver sub (1 ) of a subsea fluid flow tubular connection system with a replacement cylindrical saver sub (1 ) comprising:

releasing the worn saver sub (1 ) from a hub (2) of installed subsea equipment; retrieving an element to be released from the hub of installed subsea equipment along with the worn saver sub (1 );

installing a replacement saver sub to the retrieved element;

lowering the replacement saver sub on the retrieved element; and

connecting the replacement saver sub to hub (2) to the installed subsea equipment.