Olivier Le Peuch
CEO and Director at Schlumberger
Thank you, James. Ladies and gentlemen, thank you for joining us on the call today. In my remarks this morning, I will begin by reviewing the first quarter financial results we presented in today's earnings release. Then I will discuss the progress we are achieving across our three engines of growth and the microenvironment supporting them. And finally, I will share our outlook for the fourth quarter and the full year. Stephane will then provide more details on our financial results, and we will open the line to your questions.
Our first quarter results have built upon the positive momentum we established in the first half of the year and firmly position us to achieve our full year financial ambitions. We continued to grow revenue and adjusted EBITDA both sequentially and year-on-year, and we generated free cash flow of $1 billion for the second consecutive quarter. Internationally, we continued to seize the cycle. We achieved our highest international revenue quarter since 2015 by growing revenue in this market for the 9th consecutive quarter year on year. This was particularly visible in the Middle East and Asia, where we posted 22% year-on-year revenue growth, led by significant growth in Saudi Arabia, the United Arab Emirates, Kuwait and Egypt. Our strong international activity was further augmented by the resilient investments in the offshore markets, notably in Africa, Brazil and Scandinavia.
Offshore continues to offer many opportunities for our business, and I will shortly discuss how the recent closing of our OneSubsea joint venture with Aker Solutions and Subsea 7, will help us to expand our footprint in the market moving forward.
And in North America, although revenue decreased sequentially due to lower activity, we continue to grow year-on-year outperforming trade count. Once again, our focus on the quality of our revenue combined with this differentiated value we deliver through technology [Indecipherable] margin expansion. Our EBITDA margins reached a new cycle high of 25% and our pretax segment operating margin expanded for the 11th consecutive quarter year on year. These are very positive results, and I want to thank the entire SLB team for delivering this strong performance.
Next, I would like to share some updates about progress across our three engines of growth -- core, digital and new energy. Let me begin with the core. The oil and gas sector continues to benefit from broad, durable and resilient multi-year growth cycle that is being supported by long cycle developments, production capacity expansions, exploration appraisal and recognition of gas as a critical fuel source for the energy transition. These market fundamentals remain very compelling for our core business, which has grown 22% year to date and has materially expanded margins. This strong performance is being driven by the diversity of our portfolio, our industry leading technology, and our unique integration capabilities.
Reservoir performance achieved exceptional results with stronger evaluation activity. Production systems achieved its highest level of margin in the cycle, led by subsea, surface and [Indecipherable]. Our construction maintained impressive results through new technology innovations and differentiated performance. All in all, this was a very strong quarter across our core divisions.
The supportive microenvironment is also leading operators to make long-cycle investments offshore, where advanced inefficiency have significantly improved project economics. We have visibility into FIDs extending well beyond 2025, and there could not be a better time to join force with Aker Solutions and Subsea 7 to drive a new era for subsea.
Today, SLB is recognized for its unique ability to handle large, complex and fully integrated offshore projects, from subsurface development to midstream processing. Through our OneSubsea joint venture, we will further enhance this offering by bringing new levels of technology and partnership to the market.
Together, our companies are the clear leader in subsea multifaceted boosting and subsea gas compression, and we will provide electrification and digital solutions to further enhance the business. This partnership approach will also create a more flexible customer offering to scale through scale, increase capacity and life of field services. Collectively, this will drive meaningful change to subsea asset performance as we partner with customers to help them unlock their reserves, drive efficiency, reduce cycle times, and reduce emission in the deepwater market.
Now, let me turn to digital. On the last call quarter, I shared an update on the emerging digital trends shaping the industry. This included the adoption of cloud computing, the power of data and AI at scale, and digital operation gaining maturity. At a recent investor conference, I discussed how SLB is capitalizing on this opportunity with our platform strategy comprising of a workflow platform that serves as the backbone for our customers planning and operation, and our data and AI platform that unlocks data at scale for digital transformation.
Today, we are seeing increased digital adoption across the industry. Delfi continued its year-over-year growth momentum with a 49% increase in users and an 89% -- 86% increase in compute hours compared to the third quarter last year.
Additionally, our customers are embracing our connected and autonomous drilling solution, with 1.9 million feet of automated drilling completed in the third quarter, an increase of 60% year-over-year. As a result, SLB's platform representing our new digital technology offering sustained growth at a CAGR rate of about 60%.
The benefit of this technology is clear, and you can see this illustrated in our earnings press release this morning with our shared AWS collaborative agreement and a Kuwait Energy Basra Limited, digital field contract that is serving as just two recent examples of customers choosing SLB digital technology to reimagine their workflows across the EMP value chain.
And finally, let me quickly discuss some of the exciting opportunities in our new energy business and transition technology portfolio. As we address the energy dilemma, our industry has an imperative to decarbonize operations. Two of the most immediate opportunities to do this are reducing methane emissions and scaling CCUS as a solution for mitigating climate change.
Regarding methane, we have opportunity to address fugitive methane and flaring to better monitoring and leak detection. A few weeks ago, we launched a new IoT enabled methane point instrument for continuous monitoring that seamlessly connect to our methane digital platform for insights and analysis, eliminating the need for intermittent site visits and enabling operators to quickly scale up across their operations. This and other solutions are available today to help clients abate their methane emissions.
And in CCUS, momentum is building across the industry, both in oil and gas as well as in other hard to abate sectors. SLB is actively involved with more than 20 CCUS projects globally, and we are investing in capture technology as underscored by the partnership with TDA Research highlighted in our earnings release.
Overall, we are pleased with our pipeline of technology and projects, and we have confidence that by establishing ourselves as the leader in this space, we will create yet another avenue for diversified long-term growth.
Now we turn to our outlook for the fourth quarter and the full year. In the fourth quarter, we expect continued sequential revenue growth driven by year-end digital sales and seasonal product and equipment sales in production systems. The quarter will also reflect the results of the OneSubsea joint venture. As a result, we expect overall sequential revenue growth to be in the high single digits. With our continued focus on the quality of revenue, harnessing operating leverage and further technology adoption, we expect to maintain global pretax segment operating and EBITDA margins at their highest levels in the cycle, in line with our third quarter performance. Stephane will provide additional color on the net contribution of the OneSubsea joint venture on our fourth quarter guidance.
Turning to the full year we expect to achieve our financial ambition we shared back in January. Excluding the effects of the OneSubsea joint venture, we expect to conclude the year by increasing revenue more than 15% and growing EBITDA in the mid 20s, with recent North America headwinds being more than offset by strong international growth. With these strong, full year results, we will remain well positioned to continue returning value to our shareholders.
I will now turn the call over to Stephane.