To enhance overall well savings, operators use third-party optimization services for closing the overall drilling control loop with measured or modeled downhole data. Third parties are normally arranged by operators, so drilling contractors must find ways to safely and effectively manage many optimization services used on the rig. Third parties are often experts in downhole dynamics with little surface systems knowledge, potentially leaving drilling contractors in the unfavorable situation of giving control novices access to move equipment.
NOVOS enhances new and existing NOV control systems with safe, repeatable integration of optimization services. By limiting the knowledge transfer required for safe interaction, NOVOS provides a common interface to NOV’s land and offshore drilling systems. With predetermined limits and control functions, it allows drilling contractors to quickly integrate third parties with minimal risk to personnel and equipment.
On a single well with two 12-hour shifts, a number of contributors – drillers, assistant drillers, tool pushers, company men – can affect drilling. Different contributors make it harder to achieve drilling consistency and repeatability between shifts, making consistency between wells nearly impossible. Relying on the skill and experience of individual drillers makes the process prone to human error. Data from rig control networks shows that drillers can be highly inconsistent in the timing, depth, and speed at which a drill bit engages formations. Inconsistencies in tagging bottom and poor off-bottom parameter control can increase downhole vibration and drilling dysfunction.