Borgsten Dolphin Semi Submersible Rig
1: Brace and Leg Void Leak Detection
Bespoke design with remote testing facility
Monitor Systems was asked by Dolphin Drilling to look at replacing their Brace & Void Space detection system on the Borgsten Dolphin Semi-submersible.
Monitor Systems currently have an Anchor Windlass & Bulk Tank Monitoring System onboard the Borgsten Dolphin with remote I/O stations around the rig. The new Brace & Void Space monitoring system was based around the existing hardware located in the rig’s control room.
Design: The installed I/O has a minimum of 20% spare capacity for future expansion; the I/O racks have also been designed and manufactured with enough space for the future installation of I/O cards.
Benefits: The sensors used were IP68 rated for the braces and IP66/67 rated for the void spaces. The advantage of using these sensors combined with interface module (SIL Approved) is that you can carry out a simple ‘remote test’ of the sensor without physically having to open the void spaces to go in and test the functionality of the sensor.
Another benefit is that the electronics module of the sensor continuously monitors via frequency evaluation for a number of issues including the strong corrosion or damage on the tuning fork, the loss of vibration and the line break to the piezo drive.
Capacity: The new brace leak and void monitoring system has I/O to monitor 64 sensors within 4 new remote I/O stations. The existing HMI’s previously installed by Monitor Systems for the Anchor Windlass / Bulk Monitoring System were utilised for visualisation.
The complete system scope of work included in-situ rig survey, project management, conceptual design, QA & HS&E management, engineering and manufacture, product supply, FAT, DNV approval, software interrogation and the supply of system documentation.
2: Anchor Windlass Monitoring System
Design, Manufacture, FAT and Commissioning: Borgsten Dolphin Demi-Submersible
The Anchor Winch Monitoring system includes HMI displays in the Control Room and Pilot House, along with eight Bulk Tank guided Wave Radar Sensors.
Having the Anchor Winch Monitoring system installed on the rig is a big benefit to Dolphin Drilling. Reliable state-of-the-art monitoring technology to control the bulk material safely and in a controlled manner for the Bulk Tank System is a step forward in the right direction for rig efficiency and safety. The same display units for the system monitors the tension, chain length and pay out speed of all twelve (12) anchor winches.
A highly trained in-house engineer from Monitor Systems was invited to survey the rig, compile a report and provide all the consumables that would be required to furnish the project.
During the Rig Survey the Engineer suggested to the OIM that a display panel would be required in the Sack Store to display Bulk Tank Levels to the Control Panel Operator. The current design was based on individual Panel Meters displaying the Tank Levels. A HMI display was considered as it would look better and be capable of providing more information to the user.
Dolphin Drilling were then provided with detailed drawings and plans to help them with the system and for easy use onboard . Monitor Systems engineers have a close working relationship with Siemens, who helped provide the technical knowledge of the system including the 15” HMI touch screen monitors.
After initial project survey and reporting, Monitor Systems were awarded the contract based on having a 'can do approach' to the project including key project management parameters. The project included the FAT and commissioning of the system once installed.