SLB Limited
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Core profile pages, annual revenue records, and related research hubs for this company.
SLB Limited
Explore SLB
Core profile pages, annual revenue records, and related research hubs for this company.
Company History
Founded 1926 in Houston, Texas
Conrad Schlumberger arrived in the Pechelbronn oilfield in Alsace in September 1927 with an apparatus he had spent years developing in his laboratory at the Paris School of Mines: a cylindrical probe containing electrodes that could measure the electrical resistance of rock formations when lowered into a borehole. The measurement he took on that September day — the world's first electrical resistivity log — gave oil engineers their first empirical tool for understanding what lay beneath the surface without pulling core samples. Schlumberger had invented well logging.
Conrad and his brother Marcel had founded their Paris company in 1926 on a theoretical insight: that different rock formations conduct electricity differently, and therefore that the electrical resistance profile of a borehole wall could reveal whether the formation contained oil, gas, water, or dry rock. The idea was scientifically obvious in retrospect. Before Schlumberger, oilfield geology was based on surface mapping and intuition.
The brothers built the business through the 1930s by demonstrating wireline logging's practical value in oilfields across Europe, the Soviet Union, and eventually North America. Marcel led the American push, establishing operations in Houston and then across the producing basins of Texas and Oklahoma. The company's early clients were skeptical that an instrument measurement could replace the judgment of an experienced geologist. The logs proved them wrong consistently enough that by the late 1930s, major oil companies would not drill without a Schlumberger wireline service.
World War II interrupted operations and forced a strategic decision: the family moved the company's effective headquarters to the United States, a shift that made Houston the center of what had been a French-founded enterprise. The postwar oil boom in the Gulf Coast and the Middle East gave Schlumberger the scale to invest in the next generation of measurement tools — nuclear logging in 1962, which used gamma rays and neutron bombardment to characterize formations that electrical resistivity could not read clearly. Each generation of tool extended the company's lead over competitors who were still catching up to the previous generation.
Conrad Schlumberger was a brilliant French physicist and engineer who recognized that the electrical resistivity mapping techniques he had developed for mineral exploration could be adapted to solve the oil industry's most critical problem: identifying hydrocarbon reserves deep underground without drilling dry holes. Alongside his brother Marcel, he established the Société de Prospection Électrique in 1926, pooling their scientific expertise to develop the first wireline logging tools. Conrad's relentless focus on empirical data and rigorous scientific methodology drove the company's early innovations, culminating in the historic 1927 well logging experiment in Alsace. His leadership established the foundational corporate DNA of SLB, prioritizing proprietary technology and research and development over commoditized services. Tragically, Conrad died in 1936, just as the company was beginning its rapid global expansion, but his scientific breakthroughs secured the company's legacy and provided the technological moat that would sustain it for a century.
Marcel Schlumberger was a visionary engineer and businessman who partnered with his brother Conrad to commercialize their revolutionary wireline logging technology. While Conrad focused on the physics and sensor development, Marcel managed the complex logistics, international partnerships, and commercial strategy required to sell their services to the world's major oil companies. Following Conrad's death in 1936, Marcel assumed sole leadership of the company, navigating the treacherous geopolitical landscape of pre-war Europe. When Germany invaded France in 1940, Marcel made the critical decision to flee to the United States, carrying the company's proprietary schematics and core engineering team. He established Schlumberger Well Surveys in Houston, Texas, forging vital relationships with the US military and the domestic oil industry. Marcel's strategic foresight in relocating the company's intellectual capital to the US not only ensured the company's survival during the war but positioned SLB to dominate the post-war boom in Middle Eastern and global oil exploration, cementing his legacy as the architect of the company's global footprint.
Conrad and Marcel Schlumberger establish the Société de Prospection Électrique, applying electrical resistivity mapping to subsurface oil exploration.
The company successfully executes the first wireline electrical resistivity measurement in Pechelbronn, France, inventing the science of well logging and revolutionizing global oil exploration.
Following the invasion of France, Marcel Schlumberger relocates the company's core intellectual property and engineering team to Houston, Texas, establishing Schlumberger Well Surveys.
SLB deploys the first commercial nuclear magnetic resonance and gamma-ray logging tools, vastly improving the accuracy of porosity and lithology measurements in complex formations.
SLB completes the $14.8 billion acquisition of Cameron International, instantly establishing a dominant position in subsea production systems, surface wellheads, and measurement control equipment.
The company officially rebrands from Schlumberger to SLB to reflect its evolution into a broad-spectrum energy technology company focused on digitalization and the energy transition.
SLB announces a $7.7 billion agreement to acquire ChampionX, consolidating its leadership in production chemicals, artificial lift, and digital production optimization.
SLB reported FY2025 revenue of $35.708B and Q1 2026 revenue of $8.721B, keeping the focus on resilient international and technology-led energy services.
This $14.8 billion transaction fundamentally transformed SLB from a pure service provider into a dominant manufacturer of subsea production systems, surface wellheads, and measurement control equipment. The acquisition was designed to capture the high-margin, lump-sum equipment sales and decades-long aftermarket maintenance contracts associated with deepwater and unconventional drilling projects.
SLB purchased Smith International to achieve absolute dominance in the drill bit and drilling tools market. Smith was a premier manufacturer of polycrystalline diamond compact (PDC) bits and reamers, technologies critical for drilling through hard, abrasive rock formations in unconventional shale plays and deepwater environments.
SLB acquired GeoQuest to secure a dominant position in the rapidly emerging digital seismic processing and reservoir modeling software market. GeoQuest possessed advanced algorithms for interpreting complex 3D seismic data, a capability that was becoming essential for identifying hydrocarbon reserves in mature and geologically complex basins.
SLB entered into a definitive agreement to acquire ChampionX to consolidate its leadership in production chemicals, artificial lift systems, and digital production optimization. This acquisition was designed to create a closed-loop well lifecycle ecosystem, allowing SLB to design, drill, complete, and continuously treat the well to maximize hydrocarbon recovery.
SLB purchased the remaining 40% stake in its seismic joint venture with Royal Dutch Shell to gain full ownership and control of WesternGeco, the world's largest marine seismic acquisition company. This move was intended to consolidate decision-making and fully integrate seismic data acquisition with SLB's reservoir modeling software.
SLB traces its origins to 1926, with Conrad and Marcel Schlumberger tied to the founding story.
The first wireline logs made Schlumberger essential to modern subsurface oilfield evaluation.
SLB expanded by building wireline logging, drilling services, completions, reservoir software, subsea systems, production services, and digital energy tools, serving oil producers, national oil companies, offshore operators, shale firms, and energy companies, and using international growth, digital oilfield tools, drilling efficiency, energy transition technology, and capital discipline.
This SLB history page covers founding, growth milestones, leadership changes, and modern strategic context.