Blowout Preventer (BOP) Health Monitoring
- James E. Mckay (BP) | Clayton Simmons (NOV - eHawk Services - Equipment Optimization) | Tony Hogg (Ensco - Director of Subsea Engineering) | Gavin Starling (BP - BOP consultant) | Mike Doty (National Oilwell Varco) | Allen L. Pere (BP Brasil)
- Document ID
- Society of Petroleum Engineers
- IADC/SPE Drilling Conference and Exhibition, 6-8 March, San Diego, California, USA
- Publication Date
- Document Type
- Conference Paper
- 2012. IADC/SPE Drilling Conference and Exhibition
- 1.6 Drilling Operations, 1.12.3 Mud logging / Surface Measurements, 4.1.2 Separation and Treating, 4.5.10 Remotely Operated Vehicles, 4.1.7 Electrical Systems, 1.12.1 Measurement While Drilling, 4.1.5 Processing Equipment, 1.7 Pressure Management, 6.2.2 Strategic Health Management, 7.2.3 Decision-making Processes, 5.1.2 Faults and Fracture Characterisation
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As every motorist knows, a vehicle's dashboard is an important interface that alerts the driver of real-time changes regarding certain car engine "health?? metrics and alerts the driver that the engine may need to be serviced. While not a diagnostic tool in and of itself, the dashboard serves to alert the driver that a performance or health issue may exist. Blowout Preventer (BOP) equipment is designed to secure the well and a BOP's health is critical to ensuring that it works as designed. A realtime BOP dashboard can improve communication between operations personnel, rig contractor subsea engineers and the Original Equipment Manufacturer (OEM) to assess potential BOP health issues.
This paper describes a development process for a BOP dashboard and discusses the potential benefits, challenges, and lessons learned associated with implementing a BOP monitoring system.
Traditional multiplex (MUX) BOP control system diagnostics (see Figure 1) are designed by OEMs for use by personnel proficient in BOP control systems such as a rig contractor's subsea engineer. Control system diagnostics are generally geared more toward maintenance and troubleshooting system problems than toward operational decision making.
Traditionally the BOP diagnostic data is solely available at the rig based Engineering Work Station (EWS), also known as the event logger. Historically BOP data is not exchanged to shore from the offshore event logger. The industry could benefit from having BOP control system integrity or BOP health, presented in a manner that allows operations people (offshore and onshore) to participate in communication with BOP experts to assess any risk associated with the BOP and the BOP control system.
The BOP dashboard (see Figure 2) aims to simplify complex BOP diagnostics in an easy to understand format that facilitates a joint assessment of the issue. In early 2011 BP, Ensco, and Nation Oilwell Varco (NOV) collaborated on a project to consider preliminary development of a BOP dashboard that takes existing alarms, analog data, and events from the BOP EWS and translates them into a high level traffic light status. The traffic light logic is based on levels of system redundancy that allow the user to understand when critical functions are impaired.
The first phase of the project focuses on the electrical components (see Figure 3) of the control system with further extension to the hydraulic components (see Figure 4) in the subsequent phases of the project. Although the initial dashboard would rely solely on the eHawk platform, the end product could be a BOP monitoring dashboard incorporated into a mud logging network. When integrated with the common mud logging database the BOP data could be interconnected with other real time well construction systems such as Digital BOP pressure testing technology. If a BOP health issue should arise, the OEM / NOV eHawk web platform can provide additional layers of detail beyond the dashboard. These additional layers should provide the user the same screens that are already available in the offshore BOP diagnostic system. Such a system can also be designed to allow near real-time archiving of raw BOP data on an onshore computer and can produce a BOP health report.
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