Who were the founders of SLB?
SLB was founded in 1926 in Paris by French brothers Conrad Schlumberger (1878-1936) and Marcel Schlumberger (1884-1953).
Who was Conrad Schlumberger and what was his scientific expertise?
Conrad Schlumberger was a brilliant physicist and professor at the École des Mines de Paris. He theorized that electrical currents passed through the Earth could detect underground ore bodies and rock structures based on differing electrical conductivity.
Who was Marcel Schlumberger and what was his technical contribution?
Marcel Schlumberger was an inventive mechanical engineer from the École Centrale de Paris. While Conrad developed the physical theories and mathematical calculations, Marcel designed the rugged probes, winches, cables, and mechanical instruments needed in harsh field environments.
What was the breakthrough experiment conducted on September 5, 1927?
In Pechelbronn, Alsace, France, the brothers and colleague Henri-Georges Doll lowered an electrical sonde down Diefenbach well 2905, stopping every meter to record resistivity on a galvanometer, generating the world's first well log.
Who funded the brothers' early scientific research?
Their father, Paul Schlumberger, a wealthy textile industrialist from Guebwiller, Alsace, financed their initial experiments with 500,000 francs in 1919 under an agreement that they prioritize pure scientific discovery over commercial exploitation.
Who was Henri-Georges Doll and what was his role in the founding team?
Henri-Georges Doll, Conrad's son-in-law, was a brilliant engineer who conducted the first log in 1927 and invented continuous optical recording, the SP (spontaneous potential) log, and micro-resistivity tools, authoring over 70 fundamental logging patents.
How did the founders introduce their technology to the United States?
In 1929, the brothers brought their equipment to the Shell Oil Company in California, and in 1932 logged wells in the booming East Texas oilfield, proving their technology could prevent costly blowouts and identify hidden oil pay zones.
When did Conrad Schlumberger pass away?
Conrad Schlumberger passed away unexpectedly in May 1936 in Stockholm, Sweden, at the age of 57, after contracting a sudden pulmonary illness while returning from a technical business trip in Russia.
How did Marcel Schlumberger lead the firm through World War II?
Marcel led the company through the late 1930s and World War II, moving operations to Houston, Texas, to support Allied wartime petroleum production while protecting French staff and facilities in occupied Europe until his death in 1953.
What honors and awards did the founders receive?
Conrad and Marcel Schlumberger were awarded the prestigious Anthony F. Lucas Gold Medal by AIME, and the European Association of Geoscientists and Engineers (EAGE) awards the annual Conrad Schlumberger Award in his honor.
What museum preserves the history of the Schlumberger brothers?
The Château de Crèvecœur in Normandy, France, houses the Musée Schlumberger, preserving the original hand-drawn logs, electrical galvanometers, and field equipment used by the founding brothers.
What is the lasting legacy of Conrad and Marcel Schlumberger?
The Schlumberger brothers founded the entire field of petrophysics and subsurface geophysics, inventing the measurement technologies that discovered over half of the world's conventional oil and gas reserves.