SUBSEA TECHNOLOGY
TURNING BACK TIME
How one product helps overcome degraded valve stems in ageing fi elds
The DIA seamlessly integrates with the Jupiter 2 Subsea Control System
O
ff shore subsea production systems are fi tted with valves to control fl uid or gas fl ow in standard
operating conditions as well as the operation of valves during shutdown, intervention, maintenance, and the eventual decommissioning of the fi eld. These valves are accessible via external stems that are designed to be operated by Remotely Operated Vehicles (ROVs) Valve stems deteriorate over time
as a result of corrosion, wear or historic misuse and this can lead to a situation where close-fi tting or other types of fi xed sockets used are no longer eff ective. Subsea control specialist
Zetechtics designs and manufactures subsea control systems and tooling for subsea intervention operations and the company’s design and engineering team have developed the Jupiter Degraded Interface Adapter (DIA) to overcome the increasingly common issue of degraded valve stems in ageing fi elds.
HOW THE DIA WORKS The tool is ROV mountable. It also interfaces with the existing Jupiter Class 1-4 Torque Tool, controlled by a Jupiter 2 Subsea Control System, to provide the DIA with the feedback and control required to perform the
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valve operation accurately, within the allowed torque and turns range. In addition to the benefi ts of the
Torque Tool, the DIA seamlessly integrates with the Jupiter 2 Subsea Control System and is supplied with a pre-confi gured Jupiter Software Setup fi le (*.JUS) for operation. The DIA is designed to operate
interface stems with geometry that varies from an original hexagon to a more cylindrical shape or stems featuring slightly raised edges and other non-uniform features. Consequently, the Adapter provides
a way of operating a degraded valve or actuator into a known state using a standard Class 4 Torque Tool. The tool is supplied with a variety of
gripper fi ngers which are easily changed over on deck to suit the size and characteristics of the degraded interface. The fi ngers open to allow the DIA to work with stems with raised edges. The clamping fi nger mechanism has inherent compliance which allows the fi ngers to adjust to surface irregularities as the actuator is operated. Once fully engaged, the fi ngers allow for a close-fi t engagement around the degraded stem. When using a Jupiter Class 1-4
Torque Tool to supply the drive input, the Jupiter Software can be confi gured to provide repeated automated torque pulses to help overcome residual breakout forces.
FEATURES AND BENEFITS: • Petrobras Style output and ISO 13628-8 Rotary Docking Class 4 input
• Designed to allow the operation of Petrobras Style interfaces, with an API 17D add-on option available upon request
• Simple on-deck confi guration allows quick change over of gripper fi nger pieces
• A range of gripper fi ngers to suit diff erent stem sizes
• Gripper fi ngers available with diff erent surface profi les to allow for various types of degradation. Custom profi les available on request
• Hydraulic operation allows large engagement force and positive disengagement
• Maximum Torque: 2,711N.m (2,000lbf-ft)
• Heavy Duty Paddle Handle option • Size: 613 x 260 x 214mm • Weight: 36.9kg (air), 28.8kg (water) • Environmental: -10 to 50°C • Maximum working depth: 4,000msw. The product off ers an excellent solution for operators facing the problem of corroded sockets or valve stems.
For more information visit:
www.zetechtics.com
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