Atmosphere Sampler Overview

Introduction

JFD's Atmosphere Sampler is a simple, reliable, and compact ROV mounted intervention tool for sampling the atmosphere and pressure parameters within a Distressed Submarine (DISSUB), prior to mating with an SRV, or attempting salvage.

Principle

The Atmosphere Sampler interacts with the High Salvage Point (HSP) of a distressed submarine, collecting a sample of the DISSUB atmosphere before returning to the surface.

The Atmosphere Sampler consists of two modules; the first, the Control Valve Module, is held by the gripping claw of the ROV, and the second, the Cylinder Module, is housed in the ROV’s pod skid.

The Control Valve Module is designed to fit over the exposed HSP and automatically lock in place around it. Once in position the HSP valve can be released by the ROV and the sample collected.

Hull Integrity

In order to maintain hull integrity after the sample has been taken, the HSP is resealed. As HSPs employ a "soft seal", it is not normally possible to close the HSP valve once opened. To overcome this, JFD designed the Atmosphere Sampler's Control Valve Module in two sections. The lower section incorporates a valve that can be closed before the lower and upper sections separate. The lower section remains in place over the HSP, maintaining the integrity of the hull.

Operations

An experienced ROV pilot will play a pivotal role in the sampling of a DISSUB's atmosphere.

JFD's atmosphere sampler comes complete with full handbook and can be procured with an ROV Pilot's training package to ensure correct operation.

Atmosphere Sampler fitted to an IROV being deployed by LARS during HATs, April 2010.

The Control Valve Module of JFD's Atmosphere Sampler fitted to the HSP of a target  during SATs, April 2010.

Atmosphere Sampler Cylinder Module showing cylinders, subsea gauges and ROV-operable control valves.

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