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Schlumberger Brothers
Conrad Schlumberger (2 October 1878 in Gebweiler ( Alsace-Lorraine) – 9 May 1936 in Stockholm) and Emile Henry Marcel Schlumberger (21 June 1884 in Gebweiler – 9 May 1953 in Val-Richer) were brothers from the region of Alsace-Lorraine, France, then a part of the German Empire The German Empire (),; ; World Book, Inc. ''The World Book dictionary, Volume 1''. World Book, Inc., 2003. p. 572. States that Deutsches Reich translates as "German Realm" and was a former official name of Germany. also referred to as Imperia .... Their inventions in the area of geophysics and well logging were the beginnings of Schlumberger, Schlumberger Well Services and the entire well logging industry. Life and work Conrad and Marcel were two of six children of an affluent Alsatian Protestantism in France, Protestant family. Their father, Paul, was descended from a wealthy cotton weaving family. Their mother, Marguerite de Witt-Schlumberger, Marguerite De Witt, was a political activist. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gebweiler
Guebwiller (; Alsatian: ''Gàwiller'' ; ) is a commune in the Haut-Rhin département in Grand Est in north-eastern France. It was a sub-prefecture of the department until 2015. It is situated northwest of Mulhouse at the foot of the Vosges mountains. The ''Ballon de Guebwiller'', the highest point in the Vosges, lies to the west of the town. In 2018, Guebwiller had a population of 11,022 and its urban area had a population of 28,662. History Guebweiler, as Gebweiler, is mentioned as early as 774. It belonged to the religious foundation of Murbach, and in 1759 the abbots chose it for their residence. In 1789, at the outbreak of the French Revolution, the monastic buildings were laid in ruins, and, though the archives were rescued and removed to Colmar, the library perished. Geography Climate Guebwiller has an oceanic climate (Köppen climate classification ''Cfb''). The average annual temperature in Guebwiller is . The average annual rainfall is with December as the wet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schlumberger
Schlumberger (), doing business as SLB, is a global multinational oilfield services company. Founded in France in 1926, the company is now incorporated as Schlumberger NV in Willemstad, Curaçao, with principal executive offices in Houston, Texas. As of 2022, it is both the world's largest offshore drilling company and the world's largest offshore drilling contractor by revenue. Also known as Schlumberger Limited, the company trades on the New York Stock Exchange, Euronext Paris, the London Stock Exchange and SIX Swiss Exchange. In 2022, the Forbes Global 2000 ranked Schlumberger the 349th largest company in the world. History Schlumberger was founded in 1926 in Paris as the Electric Prospecting Company () by two brothers Conrad and Marcel Schlumberger from Alsace. Schlumberger supplies the petroleum industry with services such as seismic data processing, formation evaluation, well testing and directional drilling, well cementing and stimulation, artificial li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electric Log
Resistivity logging is a method of well logging that works by characterizing the rock or sediment in a borehole by measuring its electrical resistivity. Resistivity is a fundamental material property which represents how strongly a material opposes the flow of electric current. In these logs, resistivity is measured using four electrical probes to eliminate the resistance of the contact leads. The log must run in holes containing electrically conductive mud or water, i.e., with enough ions present in the drilling fluid. Indeed, in the borehole fluids the electrical charge carriers are only ions (cations and anions) present in aqueous solution in the fluid. In the absence of dissolved ions, water is a very poor electrical conductor. Indeed, pure water is very poorly dissociated by its self-ionisation (at 25 °C, pKw = 14, so at pH = 7, += H–= 10−7 mol/L) and thus water itself does not significantly contribute to conduct electricity in an aqueous solution. The resisti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of cities in the European Union by population within city limits, fourth-most populous city in the European Union and the List of cities proper by population density, 30th most densely populated city in the world in 2022. Since the 17th century, Paris has been one of the world's major centres of finance, diplomacy, commerce, culture, Fashion capital, fashion, and gastronomy. Because of its leading role in the French art, arts and Science and technology in France, sciences and its early adoption of extensive street lighting, Paris became known as the City of Light in the 19th century. The City of Paris is the centre of the Île-de-France region, or Paris Region, with an official estimated population of 12,271,794 inhabitants in January 2023, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resistivity
Electrical resistivity (also called volume resistivity or specific electrical resistance) is a fundamental specific property of a material that measures its electrical resistance or how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter (rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is , then the resistivity of the material is . Electrical conductivity (or specific conductance) is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter (sigma), but (kappa) (especially in electrical engineering) and (gamma) are sometimes used. The SI unit of electrical conductivity is siemens per metre (S/m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri George Doll
Henri George Doll (13 August 1902 in Paris – 25 July 1991 in Montfort-l'Amaury, France) was a French-American scientist. Biography Doll was a leading figure in the development of oil well logging and a key technical leader of the Schlumberger oilfield services company. A graduate of the École Polytechnique and École des Mines, he married Anne Schlumberger, daughter of one of the Schlumberger brothers (Conrad), and joined their company. His contributions include the induction logging technique, and during World War II he led the development of the jeep-borne mine detector. He received a Certificate of Appreciation from the United States government, and was made an officer of the Légion d'honneur. Upon his retirement in 1967, the Schlumberger Well Surveying Corporation's research laboratory in Ridgefield, Connecticut was renamed the Schlumberger-Doll Research Center in his honor. The Schlumberger-Doll Research Center was relocated to Cambridge, Massachusetts in 200 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgian Congo
The Belgian Congo (, ; ) was a Belgian colonial empire, Belgian colony in Central Africa from 1908 until independence in 1960 and became the Republic of the Congo (Léopoldville). The former colony adopted its present name, the Democratic Republic of the Congo (DRC), in 1964. Colonization of the Congo Basin, Colonial rule in the Congo began in the late 19th century. Leopold II of the Belgians, King Leopold II of the Belgians attempted to persuade the Federal Government of Belgium, Belgian government to support colonial expansion around the then-largely unexploited Congo Basin. Their ambivalence resulted in Leopold establishing a colony himself. With support from a number of Berlin Conference, Western countries, Leopold achieved international recognition of the Congo Free State in 1885. By the turn of the century, the violence used by Free State officials against indigenous Congolese and a ruthless system of economic exploitation led to intense diplomatic pressure on Belgium to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Union Of South Africa
The Union of South Africa (; , ) was the historical predecessor to the present-day South Africa, Republic of South Africa. It came into existence on 31 May 1910 with the unification of the British Cape Colony, Cape, Colony of Natal, Natal, Transvaal Colony, Transvaal, and Orange River Colony, Orange River colonies. It included the territories that were formerly part of the South African Republic and the Orange Free State. Following World War I, the Union of South Africa was a signatory of the Treaty of Versailles and became one of the Member states of the League of Nations, founding members of the League of Nations. It was League of Nations mandate, mandated by the League with the administration of South West Africa (now known as Namibia). South West Africa became treated in most respects as another province of the Union, but it never was formally annexed. The Union of South Africa was a self-governing dominion of the British Empire. Its full sovereignty was confirmed with the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schlumberger Array
Schlumberger (), doing business as SLB, is a global multinational oilfield services company. Founded in France in 1926, the company is now incorporated as Schlumberger NV in Willemstad, Curaçao, with principal executive offices in Houston, Texas. As of 2022, it is both the world's largest offshore drilling company and the world's largest offshore drilling contractor by revenue. Also known as Schlumberger Limited, the company trades on the New York Stock Exchange, Euronext Paris, the London Stock Exchange and SIX Swiss Exchange. In 2022, the Forbes Global 2000 ranked Schlumberger the 349th largest company in the world. History Schlumberger was founded in 1926 in Paris as the Electric Prospecting Company () by two brothers Conrad and Marcel Schlumberger from Alsace. Schlumberger supplies the petroleum industry with services such as seismic data processing, formation evaluation, well testing and directional drilling, well cementing and stimulation, artificial lift, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Conductivity
Electrical resistivity (also called volume resistivity or specific electrical resistance) is a fundamental specific property of a material that measures its electrical resistance or how strongly it resists electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek alphabet, Greek letter (Rho (letter), rho). The SI unit of electrical resistivity is the ohm-metre (Ω⋅m). For example, if a solid cube of material has sheet contacts on two opposite faces, and the Electrical resistance, resistance between these contacts is , then the resistivity of the material is . Electrical conductivity (or specific conductance) is the reciprocal of electrical resistivity. It represents a material's ability to conduct electric current. It is commonly signified by the Greek letter (Sigma (letter), sigma), but (kappa) (especially in electrical engineering) and (gamma) are sometimes used. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
World War I
World War I or the First World War (28 July 1914 – 11 November 1918), also known as the Great War, was a World war, global conflict between two coalitions: the Allies of World War I, Allies (or Entente) and the Central Powers. Fighting took place mainly in European theatre of World War I, Europe and the Middle Eastern theatre of World War I, Middle East, as well as in parts of African theatre of World War I, Africa and the Asian and Pacific theatre of World War I, Asia-Pacific, and in Europe was characterised by trench warfare; the widespread use of Artillery of World War I, artillery, machine guns, and Chemical weapons in World War I, chemical weapons (gas); and the introductions of Tanks in World War I, tanks and Aviation in World War I, aircraft. World War I was one of the List of wars by death toll, deadliest conflicts in history, resulting in an estimated World War I casualties, 10 million military dead and more than 20 million wounded, plus some 10 million civilian de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Toulouse
Toulouse (, ; ; ) is a city in southern France, the Prefectures in France, prefecture of the Haute-Garonne department and of the Occitania (administrative region), Occitania region. The city is on the banks of the Garonne, River Garonne, from the Mediterranean Sea, from the Atlantic Ocean and from Paris. It is the List of communes in France with over 20,000 inhabitants, fourth-largest city in France after Paris, Marseille and Lyon, with 511,684 inhabitants within its municipal boundaries (2022); its Functional area (France), metropolitan area has a population of 1,513,396 inhabitants (2022). Toulouse is the central city of one of the 22 Métropole, metropolitan councils of France. Between the 2014 and 2020 censuses, its metropolitan area was the third fastest growing among metropolitan areas larger than 500,000 inhabitants in France. Toulouse is the centre of the European aerospace industry, with the headquarters of Airbus, the SPOT (satellites), SPOT satellite system, ATR ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
