Subsea 7 Limited

Paul Booth

Mick Fowkes

Stewart John Sinclair Munro

Dan Quoc Vu

Catriona Rachel Ogg

A submersible mixing and sampling apparatus with submersible supply systems () for first and second liquid components such as a thermoset resin and a curing agent is disclosed. Each supply system has a respective submersible tank () for holding a respective one of the liquid components. Submersible mixers () downstream of the supply systems mix the liquid components underwater to form a curable mixture for injection into a subsea chamber such as a tee (). Submersible sampling devices downstream of the mixers take samples () of the mixture underwater before, during and after injection, and optionally also at the surface. The samples may be cured and tested underwater or may be lifted to the surface for testing. The apparatus may be mounted on a subsea skid () or basket.

Apparatus and method for subsea liquid mixing and sampling

A subsea drying system () for drying a chamber () underwater has an upstream piping () for conveying a pressurized drying fluid from a source () to the chamber (); and downstream piping () for expelling liquid displaced from the chamber () by the drying fluid in an open-loop dewatering mode. In a closed-loop dehumidifying mode, a recirculation path () between the downstream piping () and the upstream piping () conveys drying fluid exiting the chamber () back into the chamber () after passing through a dehumidifier (). A valve system selectively closes and opens the re-circulation path to expel displaced liquid when that path is closed and to recirculate drying fluid from the chamber () through the dehumidifier () to the upstream piping () when that path is open.

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Oyne, United Kingdom

Paul Booth