Roxar subsea ROV retrieval system

A complete system for the replacement of sensors on subsea production systems under full operation, resulting in increased reservoir productivity and optimum use of people and equipment

The new system is the first ROV solution that can individually retrieve subsea sensors and transmitters (measuring temperature, pressure, sand erosion or corrosion, for example) on trees, manifolds and process systems during production. It will lead to increased productivity for operators in the areas of subsea instrument availability and reliability, reduced costs and increased asset performance, and optimum safety and environmental protection.

The Roxar subsea ROV retrieval system consists of four main components:

A Permanently Installed Mechanical Interface, which consists of a pipeline hub with guide helix and guide funnel, which guides the electronic canister and retrieval tool into place. The interface, designed to accommodate different types of sensors, must be machined and installed on the subsea structure.

A Sensor/Transmitter which includes a probe carrier, an electronics canister and a power/communications cable. The electronics canister is locked to the hub with a mechanically operated collet connector with the electronics inside the canister translating and transferring the signals from the sensor to the control module.

The ROV Retrieval Tool which replaces the sensors during operation, providing a metallically sealed, leak proof connection to the system where the probe carrier is installed. The tool includes a collet connector with a pressure vessel and revolver.

The Hydraulic & Control System, contained within a skidded ROV retrieval tool basket. Attached as part of the ROV, the skid is the carrier used to transport the tool to its location. The skid also pumps and flushes fluid through storage tanks and hydraulic and electrical couplings to enable the ROV to control the tool.

Click here for a live presentation of the Roxar subsea ROV retrieval system