High Resolution - Stack Heading and Electrical Riser Angle System

Many installed Electrical Riser Angle systems fail to deliver the level of resolution needed to allow precise positioning of the surface vessel with respect to the seafloor installed stack to eliminate wear. This combined stack heading and ERA system is the first system to provide a cost effective solution based on state of the art inertial navigation sensors. The SH-ERA system does not use magnetic sensors for heading or attitude and as such can provide very high resolution heading and attitude data deployment after deployment with no loss of accuracy. 

The SH-ERA system can be retrofitted into existing BOP mux control systems, consumes little power and the data formats can be modified to mimic many existing systems. The subsea packaging has been designed to fit into a very small volume.

An explosion proof housed (EEX-d) option is available for a surface return angle sensor mounting below the drill floor.

Part Numbers: SH-ERA Options include connectors, mounting brackets and explosion proof housing

SH-ERA is a fully integrated system and includes:

High-performance inertial sensors

Simple user interface software

I-O hardware with multiple output options

Stack Heading, stack attitude, riser attitude output configurable up to 10Hz

Data logging capability

Audit trail for operator history logging

SH-ERA delivers both high resolution data as well as high update rate. SH-ERA can directly interface to the DP desk to provide reliable, high update rate differential data.

       Stack heading accuracy              +/- 0.4° (Secant Lat)

       Stack attitude data                       +/- 0.03°

       Riser attitude data                       +/- 0.03°

       Differential (flex joint) data +/- 0.05°

Input options include an interface to the vessels gyro to automatically compensate for the difference between the vessel heading and the stack heading.