Typical DP drilling units operate in HV split-bus, or open-bus, configuration with the power management switchboards operating in silos, using an independent island philosophy. However, this mode from a redundancy perspective requires more engines to be online than may be required for the total operational loads, creating a potentially greater emission output.
By upgrading existing rig power management systems to allow for closed-bus mode, which ties the switchboards together, this allows the power plant to run with less engines and optimal loads, therefore delivering a more efficient power source.
ADC’s recent project highlighted that DP rigs operating in closed-bus configuration can successfully reduce annual CO2 emissions by 4800 tpy – delivering a fuel saving of US$620 000 per year - while reducing engine running hours by 20%.
With the number of engines required to be online at one time lowered, the enhancement also provides operators with greater maintenance schedule flexibility, which can create potential maintenance savings of up to US$150 000 per annum.
Austin Hay, Director at ADC Energy said: “There is significant pressure on the oil and gas industry to decarbonise current assets and the findings of our recent project effectively highlight how upgrades to existing systems can actively reduce the carbon footprint of operations.
“We recognise this enhancement requires considerable investment from rig owners and operators but as the sector continues its efforts to deliver more sustainable operations, this capital is essential to support net zero goals. Existing rigs and vessel are critical components in the energy transition, and we are already working with a number of clients to advise them through this process to ensure that assets continue to operate safely and efficiently with minimal environmental impact.”
Read the latest issue of Oilfield Technology in full for free: Issue 3 2021
Oilfield Technology’s third issue of 2021 starts with a report from Wood Mackenzie focusing on the upstream industry’s fortunes in Asia-Pacific. The rest of the issue is dedicated to features covering offshore engineering, coiled tubing, frac technology, completion technologies, water management, well placement and much more.
Exclusive contributions come from Wild Well Control, Cudd Pressure Control, TMK, NOV, Archer, Tendeka, TETRA Technologies and more.
Read the article online at: https://www.oilfieldtechnology.com/hse/26102021/adc-energy-identifies-upgrade-to-reduce-rig-emissions-by-almost-5000-tpy/