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SLB trades oil-service identity for **$4.1B** thermal systems acquisition—liquid cooling replaces reservoir tech as core competency.
$4.1 billion
in cash for Kelvion
21 data center campuses
across six countries
$1.2 billion
with EBITDA margins near
18%
SLB is paying 3
SLB paid $4.1 billion in cash for Kelvion, a German thermal management manufacturer whose plate-and-shell heat exchangers now cool more server racks than refineries. The deal closed without regulatory holdups. Schlumberger—formerly the world's largest oilfield services contractor—no longer calls itself that. The rebrand to SLB arrived in 2022. The Kelvion acquisition finishes the argument.
Kelvion builds industrial-grade cooling systems: evaporative condensers, liquid chillers, modular heat rejection units designed for continuous loads in harsh environments. SLB already operates 21 data center campuses across six countries, most built since 2021 when the company launched its digital infrastructure division. Kelvion's revenue last year was €1.1 billion, roughly $1.2 billion, with EBITDA margins near 18%. SLB is paying 3.4x trailing revenue. The premium reflects scarcity, not growth multiples. There are five manufacturers worldwide who can deliver hyperscale cooling systems at the reliability and thermal density AI clusters now require. Kelvion is the only one without a hyperscaler parent or joint venture lock-in.
This matters because the data center thermal problem is no longer hypothetical. NVIDIA's H200 GPU clusters generate 700 watts per chip at full inference load. A single rack can exceed 100 kilowatts. Traditional air-cooled CRAC units fail at 25 kW per rack. Liquid cooling is the only path, and Kelvion's plate heat exchangers move 40% more thermal energy per square meter than competitors' tube designs. SLB is not diversifying. It is rotating capital from a sector where upstream capex fell 22% year-over-year in North America to one where hyperscale build-out is running $200 billion annually. The company's oil exposure remains—63% of revenue in Q4 2024—but the message to allocators is clear. SLB will not wait for drilling recovery. It will build the infrastructure AI requires and sell thermal services the same way it sold reservoir logging: as mission-critical, high-margin technical work that cannot be easily replicated.
Operators should track three near-term developments. First, SLB's existing digital contracts with Microsoft Azure and Google Cloud include thermal management clauses that activate in Q3 2025. Kelvion's systems will backfill those obligations without third-party procurement. Second, the company will likely announce a joint venture with a hyperscaler by year-end—probable partners are Microsoft or Oracle, both of whom are short on thermal capacity for sovereign cloud builds in Europe. Third, watch SLB's capital allocation in the next two quarters. If upstream capex falls below $2.2 billion per quarter, the pivot is structural, not opportunistic.
The transaction removes $4.1 billion in dry powder that could have returned to shareholders or funded buybacks at $48 per share, a 15% discount to the January high. SLB chose scale in a supply-constrained market instead. Kelvion's order backlog extends 18 months. The next thermal contract SLB signs will use equipment it now owns.
Branded by POPS4 · proof in 60 seconds
For the principal
If your office holds energy transition theses, SLB now offers data center infrastructure exposure without hyperscaler governance risk.
For the operator
Watch for SLB's Q2 capex split—upstream below $2.2B confirms permanent capital rotation into digital infrastructure thermal services.
For the house
Long SLB in Infrastructure Transition book. Kelvion acquisition locks 18-month thermal backlog—hyperscaler JV announcement by December probable.
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