may be too long for the length of the article . please help by moving some material from it into the body of the article . please read the layout guide and lead section guidelines to ensure the section will still be inclusive of all essential details . please discuss this issue on the article s talk page . may 2015 national oilwell varco type public traded as nyse nov s & p 500 component industry oilfield services & equipment headquarters houston texas u.s. key people chief executive officer clay c. williams 1 products oilfield products & services revenue us 22.9 billion fy 2013 2 operating income us 3.4 billion fy 2013 2 net income us 2.3 billion fy 2013 2 total assets us 31.484 billion fy 2012 total equity us 20.239 billion fy 2012 number of employees 64 000 2014 website http www.nov.com national oilwell varco headquarters in greater sharpstown houston national oilwell varco nov is an american multinational corporation based in greater sharpstown houston texas . 3 4 it is a leading worldwide provider of equipment and components used in oil and gas drilling and production operations oilfield services and supply chain integration services to the upstream oil and gas industry . the company conducts operations in more than 1 200 locations across six continents . 2 the company s common stock is traded on the new york stock exchange under the symbol nov . 5 the company operates through four reporting segments that were reorganized in 2014 rig systems rig aftermarket completion and production solutions and wellbore technologies . 6 products include all the heavy hardware for oil well drilling as well as drilling instrumentation and controls and drilling power generation and control . a partial list of heavy hardware includes topdrives rotarys drawworks derricks bops blowout preventers mud pumps riser equipment and complete drilling rigs . products also include instruments and controls required on the rig floor for the drilling operation . this includes sophisticated electronics for precise control such as the control system cyberbase . nov also produces control electronics for power generation and control of drilling motors and motor control centers for ac motor control . in 2008 the houston chronicle ranked national oilwell varco as the best company in greater houston . in 2007 the newspaper ranked national oilwell varco number 15 . 7 nov is the houston area s largest energy employer with more than 14 500 workers in the region according to houston business journal research . 1 contents 1 history 2 brands and products 3 see also 4 references 5 external links history edit national oilwell s two main predecessors oilwell supply and national supply were founded in 1862 and 1893 respectively . these two companies manufactured and distributed pumps and derricks . in 1930 united states steel acquired oilwell supply . in 1958 armco steel merged with national supply . in 1987 national supply merged with uss oilwell to become national oilwell . in 2000 national oilwell merged with iri international corp. founded and managed by hushang ansary which manufactures and sells drilling rigs and specialty steel products . 8 varco was founded as abegg and reinhold company by walter abegg and baldwin reinhold in 1908 . varco is an acronym for vuilleumiere abegg and reinhold company after edgar vuilleumiere became a partner in 1915 and varco international in 1973 . in 2005 national oilwell and varco merged to become national oilwell varco . in 2014 clay williams took over as ceo succeeding former ceo pete miller who served as nov s ceo for nearly 13 years . 1 miller will become executive chairman of the national oilwell varco spinoff company distributionnow . the company employs nearly 64 000 people and has over 1 200 facilities across six continents worldwide . 2 in february 2012 nov acquired a russian coring company interval ltd. brands and products edit list of national oilwell varco s brands see also edit houston portal companies portal energy portal list of oilfield service companies references edit a b c national oilwell varco moves forward with ceo transition . retrieved 2014 03 19 . a b c d e nov 2013 annual report . contact us . national oilwell varco . retrieved on february 5 2010 . 7909 parkwood circle dr. houston tx 77036 districts . greater sharpstown management district . retrieved on august 15 2009 . national oilwell varco nov in russia . retrieved 2013 12 26 . 1 . national oilwell varco . retrieved on february 5 2010 . 7909 parkwood circle dr. houston tx 77036 cook lynn . chronicle 100 no. 1 national oilwell varco builder of rigs maker of deals . houston chronicle . may 16 2008 . retrieved on july 10 2011 . staff . bloomberg iri international . bloomberg.com . retrieved 12 may 2015 . http www.bloomberg.com research stocks private snapshot.asp privcapid 369990 nov branches . external links edit official national oilwell varco home page human capital management v t e petroleum industry petroleum primary 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