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The number of mud products and mud companies expanded greatly after the war. R&D into drilling fluid systems was a high priority of the operators, especially the majors. The majors, assisted by the mud companies, developed improved mud products and systems to combat drilling problems such as wellbore stability, lost circulation and fluid loss control. Prior to WWII Baroid Sales Company maintained about 85% market share of the mud business. Most of the primary mud sales companies operated through distributors, such as lumberyards, who had warehouses and fleets of trucks. The suppliers of barite and bentonite through the 1930s was primarily Baroid and Milwhite (through their sales group Milchem).
After the war the Stroud patent expired and Magnet Cove Barium Corporation, IMC Drilling Mud Inc. and some independent mining operations successfully reduced Baroid's market share. Oil Base were tending toward setting up their own distribution systems. Mud technology, testing, products and systems improved dramatically. A number of independent mud companies, some fairly large, were established during this period.
IMC Drilling Mud Inc.
Oil Base, Inc.
Other Mud Companies
International Drilling Fluids (IDF)
Indian Mud Company
Drilling Specialties (Phillips 66)
Rotary Drilling Services (Amoco)
Barium Supply Company
Products and Systems
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