
Patterson-UTI Energy, Inc. was founded in 1978 as a land exploration and drilling business. The company expanded rapidly, and as of 2019, is one of the largest onshore, oil and natural gas drilling contractors in North America. It operates through two segments – Contract Drilling, and Pressure Pumping and Other.
https://en.wikipedia.org/wiki/Patterson-UTI
https://in.investing.com/equities/patterson-uti-energy-inc
https://finance.yahoo.com/quote/PTEN/profile?p=PTEN
https://www.comparably.com/companies/patterson-uti-energy/mission
https://www.crunchbase.com/organization/patterson-uti-energy
https://sec.report/CIK/0000889900