List of Oil and Gas companies

Indian Oil Corporation
http://www.indianoilcorp.com/
ONGC
http://www.ongcindia.com/
Bharat Petroleum
http://www.bharatpetroleum.com/
Reliance Petroleum Limited
http://www.relpetro.com/
Essar Oil Limited
http://www.essar.com/
Gas Autority of India
http://www.gailonline.com/
Hindustan Petroleum Corporation
http://www.hindpetro.com/
Aban
http://www.abaindia.com/
Oil India Limited
http://oilindia.nic.in/ourcomp_spread_assam.htm
Tata Petrodyne
http://tata.com/tata_petrodyne/index.htm
Hindustan Oil Exploration Company Limited
http://www.hoec.com/
India LPG
http://www.indialpg.com/
IBP Co. Limited
http://www.ibpoil.com/
Lubricants India
http://www.lubricantsindia.com/
Oil Gas India
http://www.oilgasindia.com/
Petrosil Group
http://www.petrosil.com/
Shiv-Vani Universal
http://www.shiv-vani.com/
Kochi Refineries Limited
http://www.kochirefineries.com/
Niko Resources Limited
http://www.nikoindia.com/
Assam Oil Company Limited
http://en.wikipedia.org/wiki/Assam_Oil_Company_Ltd
Balmer & Lawrie & Co.
http://www.balmerlawrie.com/
Bombay High
http://www.bombayhigh.com/
Mangalore Refinery and Petrochemicals
http://www.mrpl.co.in/
Petronet LNG Limited
http://www.petronetlng.com/
Gujarat Oleo Chem Limited
http://en.wikipedia.org/w/index.php?title=Gujarat_Oleo_Chem_Ltd
Geo Global Resources
http://en.wikipedia.org/w/index.php?title=Geo_Global_Resources
Cairn Energy
http://en.wikipedia.org/wiki/Cairn_Energy
Charottar Gas Sahkari Mandli
http://en.wikipedia.org/w/index.php?title=Charottar_Gas_Sahkari_Mandli
Essar Oil India
http://en.wikipedia.org/w/index.php?title=Gujarat_Gas_Co._Ltd
Gujarat Gas Company Limited
http://en.wikipedia.org/w/index.php?title=Gujarat_Gas_Co._Ltd
Gujarat State Petroleum Corporation
http://en.wikipedia.org/w/index.php?title=Gujarat_State_Petroleum_Corporation
HOECL
http://en.wikipedia.org/w/index.php?title=HOECL
Jubiliant Empro
http://en.wikipedia.org/w/index.php?title=Jubiliant_Empro
JHON ENERGY
http://en.wikipedia.org/w/index.php?title=JHON_ENERGY
Pankaj Petroleum Corporation Limited
http://en.wikipedia.org/w/index.php?title=Pankaj_Petroleum_Co._Ltd
Piyush Petroleum Corporation Limited
http://en.wikipedia.org/w/index.php?title=piyush_Petroleum_Co._Ltd
Prize Petroleum Corporation Limited
http://en.wikipedia.org/w/index.php?title=Prize_Petroleum_CO.LTD
Hardy Oil and Gas Limited
http://www.oilvoice.com/Hardy_Oil_and_Gas
Selan Exploration Tech Limited
http://en.wikipedia.org/w/index.php?title=Selan_Exploration_Tech.Ltd
M/S Kunj Forgings Private limited
http://www.kunjforge.in/
SledgeHammer Oil Tools Private Limited
http://www.sledgehammerasia.com/
Aeromarine
http://www.aeromarineindia.com/
Jindal Drilling and Industries Limited
http://www.jindal.com/
Parveen Industries Private Limited
http://www.parveenoilfield.com/
Punj Lloyd Limited
http://www.punjlloyd.com/
Alfa Pumps and Systems
http://www.alfapumpsindia.com/
Gumpro Chem Drilling Fluids
http://www.gumprodf.com/
Indiana Gratings Private Limited
http://www.hotfrog.in/Companies/NA-GRATINGS