- Lebsack Oil Production Inc
- Ledwith Oil
- Ledyard Oil Co
- Lee Moore Oil Co
- Lee Moore Oil Co
- Lee Phillips Oil Co
- Lee's Oil Co
- Leeber Oil Co Inc
- Leeco Energy Inc
- Leeco Energy Inc
- Leeman Energy Corp
- Leemar
- Legacy Resources Co
- Leggett Oil Fill Svc
- Lehto Oil & Gas LLC
- Lehto Oil & Gas LLC
- Lein Oil Co
- Leiszler Oil Co
- Lem Operating Co
- Lema Petroleum Inc
- Lenox Oil Co
- Leonard Production Inc
- Lera
- Lerblance Oil & Gas Co
- Levisay Operating Co
- Lewis A Hembree Production Co
- Lewis Energy Group
- Lewis Oil & Gas Inc
- Lewis Oil & Gas Inc
- Lewis Oil & Gas Inc
- Lewis Oil Co
- Lewis Oil Co
- Lewis Oil Corp
- Lewis Oil LLC
- Lewis Oil LLC
- Lewis Operating Co
- Lewis Operating Co
- Lewis Treatment Plant
- Lewis Treatment Plant
- Lexxus Natural Gas LLC
- Liberty Operations & Cmpltns
- Lico International
- Lico International
- Lico International
- Limestone Oil & Gas Co
- Linco Oil USA Inc
- Lindenmuth & Assoc
- Lindenmuth & Assoc Inc
- Lindenmuth & Assoc Inc
- Linder Oil
- Linder Oil & Gas
- Linder Oil Co Inc
- Lindsey Enterprises
- Link Oil Co
- Link Resources
- Linn Energy Lcc
- Lion Oil Co
- Lion Oil Co
- Lion Oil Pump Station
- Lion Oil Pump Station
- Lion Production Inc
- Liquid Air Corp Ind
- Little Acorn Oil
- Little General
- Little Oil Co
- Little Oil Co Inc
- Littlepage Oil Properties
- Littlepage Oil Properties
- Littlepage Oil Properties
- Littlepage Oil Properties
- Live Oak Energy Inc
- Llano Royalty Corp
- Llano Royalty Corp
- Lmp Petroleum Corp
- Lo Boy Oil Co
- Lobar Oil Co
- Lobo Oil Field Resources LLC
- Locators Oil & Gas
- Locin Oil Corp
- Locin Oil Corp
- Locker Oil Co Inc
- Loeb & Steinwachs
- Loeb & Steinwachs
- Loeb Oil Co
- Loeb Oil Co
- Loethen Oil Co
- Loethen Oil Co
- Loffland Limited Partnership
- Loflin Oil Co
- Logan Oil
- Logan Oil LLC
- Logan Oil Tools Inc
- Lone Star Pipeline
- Long Brothers Oil Co
- Longbow LLC
- Longleaf Energy Group Inc
- Loop
- Lothian Oil
- Lott Oil Co Inc
- Louis Dreyfus Natural Gas
- Louis Dreyfus Natural Gas
- Louis Dreyfuss Natural Gas
- Louisiana Delta Oil Co
- Louisiana Delta Oil Co
- Louisiana Gas Development Corp
- Louisiana Gas Development Corp
- Louisiana Natural Gas Svc
- Lowe Partners
- Lowe Partners
- Lowery Oil Co
- Lowrance Gas & Oil Properties
- Lpc Crude Oil Inc
- Lucas Oil Burner Svc
- Lucas Oil Products
- Lucas Petroleum Group
- Lucas Petroleum Group
- Luebbering Oil Co Inc
- Luff Exploration
- Luff Exploration Co
- Luigy's Oil
- Lundell's Inc
- Lundy Richard C Oil & Gas
- Lurgi Oil & Gas
- Lurgi Oil & Gas
- Luxury Mobile Oil
- Lyden Oil Co
- Lyden Oil Co
- Lykins Oil
- Lykins Oil Co
- Lyle Resel Standard Oil Jobber
- Lynch Super Oil Co
- Lyne Energy Partners
- Lyne Energy Partners
- Lynx Energy Co
- Lynx Operating Co
- Lynx Petroleum Inc
- Lyster Oil
- M & A Oil Co LTD
- M & A Oil Co LTD
- M & G Drilling Co Inc
- M & J Energy Inc
- M & L Oil
- M & M Oil Corp
- M & M Oil Inc
- M & M Oil Svc
- M & M/O'Neill Oil
- M & R Oil Field Repair
- M B Jones Oil Co
- M B Oil Corp
- M G Oil
- M G Oil Inc
- M I Drill Fluids Oil Well
- M Peyton Bucy
- M W Petroleum
- Ma Guire Oil Co
- Mac Farlane CO-USA
- Mac Millan Oil Corp
- Mac Oil Co
- Mac Oil Co
- Mac Oil Co
- Mac Pherson Oil Co
- Mac Pherson Oil Co
- Mack Energy
- Mack Energy Co
- Mack Energy Co
- Mack Energy Co
- Mack Energy Corp
- Mack Oil Corp
- Mack Oil Corp
- Macomber Oil Co
- Macro Oil Co
- Maddox Oil & Gas
- Maddox Operating
- Madrick Oil Burner Svc
- MAE Resources Inc
- Magellan Petroleum Corp
- Maggard Supply & Oil Co
- Magness Oil Co
- Magness Petroleum Co
- Magness Petroleum Co
- Magnet Oil Corp
- Magnum Engineering
- Magnum Oil Tools
- Maguire Oil
- Maguire Oil
- Maguire Oil
- Maharger Inc
- Mahfouz Energy Co
- Main Street Oil
- Main Street Oil
- Majestic Oil & Gas Inc
- Major Pipeline
- Makar Oil & Gas
- Mako
- Makoil Inc
- Makoil Inc Railroad Valley
- Mallard Oil & Gas
- Malson Oil Co
- Manco Corp
- Mandarin Oil & Gas
- Mangum's Oil Field Svc Inc
- Manhattan Oil Svc
- Mansfield Oil Co
- Mansfield Oil Co
- Mansfield Oil Co
- Mansfield Oil Co
- Manti Operating Co
- Manti Resources
- Map Oil Co Inc
- Map Oil Tools Inc
- Map Production Co
- Mar Oil & Gas Corp
- Mar-Lou Oil Co
- Maralo Inc
- Maralo Inc
- Maralo LLC
- Maran Oil Co
- Marathon Oil
- Marathon Oil & Gas
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Co
- Marathon Oil Corp
- Marathon Oil Corp
- Marbob Energy Corp Office
- Marco
- Marcum Oil
- Marcum Oil
- Marcum Oil
- Marianas Operating Co
- Marianas Operating Co
- Marion Partlow Oil
- Marion Partlow Oil
- Marjac Oil Co
- Marjo Operating Co Inc
- Marjo Operating Co Inc
- Mark Operating Co Inc
- Mark West Hydrocarbon Inc
- Mark West Hydrocarbon Inc
- Marks & Garner
- Marlin Royalty Co LLC
- Marlyn Co
- Marmac Resources Co
- Marmik Oil Co
- Marmik Oil Co
- Marquis Oil
- Marshall Oil Co No 2
- Marshall R Young Oil Co
- Martin Oil Properties
- Marvel Petrolem Corp
- Marwell Petroleum
- Marwell Petroleum
- Masada Oil & Gas Co LTD
- Masada Oil & Gas Co LTD
- Mash Oil Tool
- Mash Oil Tool
- Mason Drilling Inc
- Mason Drilling Inc
- Mason Oil Co
- Masters Offshore
- Matador Drilling Corp
- Matador Pipelines
- Matrix Energy
- Matrix Energy
- Matrix Gas
- Matrix Oil Co
- Matrix Oil Corp
- Matthew E Meagher Oil & Gas
- Maverick Energy Group
- Max Inc
- Max Land Oil Co
- Maxwell Oil
- Mayco Oil Inc
- Maynard Oil
