油田服务业是石油工业重要的组成部分,从美国起步,一开始就分立于石油公司之外。油田服务公司是石油公司的乙方,是为石油天然气勘探和开采提供服务的公司,提供物探、钻井、油田技术服务(泥浆、固井、测井、完井、增产措施)以及与上述专业相关的研发、服务和制造业。20世纪90年代后,国际油田技术服务公司“五巨头”经过重组演变为斯伦贝谢、哈里伯顿和贝克休斯“三巨头”在各自优势领域垄 Oilfield services industry is an important part of the oil industry, starting from the United States, from the very beginning, separate from the oil companies. Oilfield Services Company, a petroleum company, is a company that serves oil and gas exploration and production. It provides geophysical, drilling and oilfield technical services (mud, cementing, logging, completions and stimulation measures) as well as those related to the above professions R & D, service and manufacturing. After the 1990s, the international oilfield technology service company “Five Giant” was reorganized into Schlumberger, Halliburton and Baker Hughes “Big Three” in their respective advantages