Marine Riser Angle Monitoring System (MRAMS) is your high-accuracy solution for monitoring the differential angle between your drilling risers and blowout preventers (BOPs) to reduce excessive wear on your wellheads. MRAMS provides high update, low latency data updates ensuring you know exactly what is happening. Unlike expensive cabled solution which are vulnerable to damage, MRAMS is a wireless acoustic solution. Simple and intuitive software Provides clear and unambiguous data on a riser’s angle and profile.
Designed for use from both Dynamically Positioned (DP) and moored drilling rigs, MRAMS uses our low-risk, field-proven 6G hardware and Wideband 2 acoustic technology to maintain an uninterrupted wireless data link between a rig and BOP, even in the high-noise environments typically associated with drilling operations.
Suitable for real-time monitoring for drilling operations and riser movement, MRAMS provides high update, low latency data updates ensuring you know exactly what is happening during your operations. Unlike expensive cabled solution which are vulnerable to damage, MRAMS is a wireless acoustic solution. Simple and intuitive software provides clear and unambiguous data on a riser’s angle and profile
Designed for use from both dynamically positioned (DP) and moored drilling rigs, MRAMS uses our low-risk, 6G hardware and Wideband 2 acoustic technology to maintain an uninterrupted wireless data link between a rig and BOP, even in the high-noise environments typically associated with drilling operations.
Developed from field-proven components, MRAMS is based on the integration of our USBL acoustic positioning technology and BOP-mounted transponders fitted with high resolution inclinometers. This provides clear and unambiguous data on your vessel’s position and riser angle status.
At a glance:
How it works
MRAMS comprises of four key elements; a Navigation Sensor Hub (NSH) and computer for controlling the transmission and decoding of acoustic signals, a vessel-based HPT 5000 or HPT 7000 transceiver which acts as an interrogator/receiver and responds to commands from the NSH, and a pair of DPTi 6 transponders; one fitted to the riser and one to the BOP.
On command from the NSH, one of three angles can be measured: the riser, the BOP or differential riser/BOP angle. During drilling operations, the riser and BOP angles are continuously measured by each DPTi 6 and the differential riser/BOP angle calculated. The angles are transmitted to the vessel using high speed digital acoustic telemetry, where they are received by the HPT transceiver, decoded, and then displayed on the bridge or drill floor. The vessel’s position and bearing relative to the BOP is also calculated and the information displayed to your DP operator or barge engineer. This data enables them to steer the rig and return the riser flex joint back to vertical.
In addition to its stand-alone capability in accurately monitoring the riser and BOP differential angle during drilling operations, MRAMS integrates seamlessly with our dynamic positioning (DP) reference system, Marksman LUSBL, to provide reliable and accurate vessel positioning for mobile drilling units.
• Operating depth range 3,000 m
• Robust two-way communications
• Medium Frequency (18-36 kHz)
• Compatible with all makes of DP system
• 2 x DPTi 6 transponders
• Riser mounting buckets
• HPT transceiver (5000 or 7000)
• Marine Computer (running MRAMS software)
• Navigation Sensor Hub (NSH)
• High accuracy inclinometer range: ±90°
• Accuracy: 0° to ±15° = ±0.05°; 0° to ±45° = ±0.2°
• Depth rated to 3,000 m
• Tilt switch ±30-45°
• Strain gauge pressure sensor ±0.01%
• High precision strain gauge (optional) ±0.01%
• Comprehensive and flexible training for system operators
• 24-hour support, whenever and wherever you are in the world
• Work side-by-side with our project and applications group from concept to deployment
• Systems are manufactured and tested before delivery at our world-class in-house facilities
