Wyoming's oil and gas industry plays a pivotal role in energy production, primarily focused on extraction and services associated with oil and natural gas. The state is home to a blend of companies, from drilling contractors and service providers to engineering firms focusing on safety and efficiency. A noticeable trend in the sector is the increasing incorporation of technology to improve environmental compliance and operational productivity. With changing regulations and market dynamics, the Wyoming oil and gas sector is anticipated to adopt more sustainable practices while exploring new extraction methods to maintain profitability amid shifting energy demands.


The companies listed represent a broad spectrum of the Wyoming oil and gas sector. Ranging in size from small teams to larger firms, they are predominantly based in Casper and Gillette. Founded between 1948 and 2019, their specializations include drilling, exploration, fuel supply, and environmental consulting, with many companies emphasizing safety and community support throughout their operations.


Continue reading to discover Wyoming's top oil and gas companies.


Top 22 Oil And Gas Companies in Wyoming


1. M & K Oil Company, LLC

  • Website: mkoil.net
  • Ownership type: Private
  • Headquarters: Gillette, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1974
  • Headcount: 51-200
  • LinkedIn: m%26koilcompanyllc

M & K Oil Company, LLC, based in Gillette, Wyoming, has been a significant player in the oil and gas service industry since its inception in 1974. The company specializes in the maintenance and operation of oil and gas wells, providing critical services such as hot oil trucks, roustabout service, and downhole pump repair. With a workforce of approximately 70 knowledgeable employees, M & K Oil operates over 650 wells, ensuring efficient production for its clients. The company prides itself on its commitment to safety, adhering to OSHA standards and conducting annual certifications for its operations. M & K Oil also has a sister company, Mac Drilling, which extends its capabilities into exploratory and development drilling, further enhancing its service offerings in the oil and gas sector.


2. Freedom Fuels USA, Inc

  • Website: freedomfuels.com
  • Ownership type: Private
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2019
  • Headcount: 11-50
  • LinkedIn: freedom-fuels-usa-inc

Freedom Fuels USA, Inc, founded in 2019 and based in Casper, Wyoming, is a private company that specializes in logistics and service solutions for the oil and gas sector. With a workforce of 11 to 50 employees, the company focuses on providing bulk fuel supply and hydrovac excavation services across the United States, particularly in the Rocky Mountain region and Texas. Their operations are designed to support drilling and completion needs, ensuring that clients receive reliable and safe fueling services around the clock. Freedom Fuels has established strong relationships with refineries and fuel brokers, allowing them to maintain a steady supply of diesel fuel. Their hydrovac services offer a safe and efficient method for excavation, minimizing risks associated with traditional digging methods. The company prioritizes safety and operational excellence, aiming to enhance the client experience through dedicated service and continuous improvement.


3. Unit Drilling Co

  • Website: unitdrilling.com
  • Ownership type: Private
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1963
  • Headcount: 201-500
  • LinkedIn: unit-drilling-co

Unit Drilling Co, a subsidiary of Unit Corporation, has been a significant player in the oil and gas sector since its inception in 1963. Based in Casper, Wyoming, the company operates 14 onshore drilling rigs across key regions in the United States, including Texas, Oklahoma, Louisiana, and New Mexico. With over six decades of experience, Unit Drilling focuses on providing efficient and safe drilling solutions tailored to meet the needs of its clients. The company prides itself on its high-spec, pad-optimal BOSS rigs, which are designed to meet the demands of contemporary horizontal drilling. Unit Drilling emphasizes operational excellence, safety, and environmental health, striving to create value for its customers while maintaining a commitment to community engagement and sustainability. Their operational strategy is centered on maximizing the utilization of their advanced rig fleet and aligning with clients who prioritize efficiency and safety in their drilling operations.


4. True Oil LLC

  • Website: truecos.com
  • Ownership type: Family Owned
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1948
  • Headcount: 501-1000
  • LinkedIn: true-oil-llc

True Oil LLC, part of the True Companies based in Casper, Wyoming, has been a family-owned entity since its inception in 1948. The company specializes in oil exploration and production, primarily operating in the Rocky Mountain region. True Oil has developed the expertise to explore and manage oil operations not only within the United States but also in other countries. This operational breadth reflects its commitment to the oil and gas industry. True Oil LLC is part of a larger organization that also includes companies involved in drilling, pipeline operations, and oilfield services, which enhances its capabilities and market reach. With a workforce of around 125 employees, True Oil continues to contribute to the energy sector while maintaining its family-owned values.


5. Homax Oil Sales, Inc.

  • Website: homaxoil.com
  • Ownership type: Private
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1978
  • Headcount: 51-200
  • LinkedIn: homax-oil-sales-inc.

Homax Oil Sales, Inc. is a private company based in Casper, Wyoming, specializing in the supply of fuel and lubricants. Founded in 1978, the company has established a strong presence in the Rocky Mountain region, with multiple locations across Wyoming. Homax Oil provides a comprehensive range of petroleum products, including various grades of diesel fuel, gasoline, and lubricants tailored for industries such as agriculture, construction, and transportation. Their commitment to exceptional service is evident in their timely deliveries and customer-focused approach. The company operates a large fleet of delivery vehicles, ensuring efficient distribution of their products. Additionally, they offer a variety of services, including bulk deliveries, fleet fueling, and equipment programs, further solidifying their role in the oil and gas industry.


6. SOS Well Services, LLC


SOS Well Services, LLC, based in La Barge, Wyoming, is an oilfield services company that has been operational since 2000. The firm provides specialized services including workover, roustabout, swabbing, and pipeline projects, primarily catering to the oil and gas industry. With a dedicated team and a management group that collectively holds over 150 years of experience, SOS Well Services focuses on delivering quality service across Wyoming and Nebraska. The company operates a fleet that includes workover rigs, swab units, and roustabout trucks, ensuring they meet the specific challenges of the local oil and gas fields. Their commitment to safety and environmental responsibility is evident in their operational practices, which include compliance with industry standards and initiatives aimed at wildlife conservation. SOS Well Services has established Master Service Agreements with major oil and gas companies, further solidifying their role in the industry.


7. Cyclone Drilling Inc

  • Website: cyclonedrilling.com
  • Ownership type: Family Owned
  • Headquarters: Gillette, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1975
  • Headcount: 501-1000
  • LinkedIn: cyclone-drilling-inc

Cyclone Drilling Inc, based in Gillette, Wyoming, has been a prominent player in the oil and gas drilling sector since its establishment in 1975. The company specializes in providing drilling services, operating a fleet of modern rigs that are tailored for the demanding conditions of the Rocky Mountain region. Cyclone Drilling emphasizes safety and performance, ensuring that their rigs are equipped with the latest technology and safety features. Their primary clientele consists of oil and gas companies that require dependable drilling operations to access natural resources efficiently. With a workforce of around 221 employees, Cyclone Drilling is family-owned and maintains a strong commitment to its employees and the communities it serves. The company has built a reputation for tackling difficult drilling projects and achieving safety milestones, which further solidifies its standing in the industry.


8. Texhoma Land Consultants


Texhoma Land Consultants, founded in 1991 and based in Gillette, Wyoming, is a private consulting firm that specializes in land management for the oil and gas and renewable energy sectors. With a team of experienced land managers, the company offers a range of services including due diligence, title research, lease negotiations, and GIS mapping. They have a strong track record, having leased over 1.1 million net acres and reviewed 2.3 million net acres in due diligence across the United States. Their expertise extends to navigating the legal and regulatory frameworks that govern energy projects, ensuring that clients are well-informed and compliant. Texhoma's involvement in both traditional oil and gas and the growing renewable energy sector positions them as a valuable partner for companies looking to optimize their land management strategies and enhance their operational efficiency.


9. Rocking WW Minerals, LLC

  • Website: rockingww.com
  • Ownership type: Private
  • Headquarters: Sheridan, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2018
  • Headcount: 11-50
  • LinkedIn: rocking-ww-minerals-llc

Rocking WW Minerals, LLC is a mineral and royalty acquisition company based in Sheridan, Wyoming. Established in 2018, it operates as a subsidiary of Flat River Minerals, which was founded by professionals with extensive experience in the oil and gas industry. Rocking WW Minerals specializes in evaluating and purchasing mineral and royalty interests, primarily in Wyoming's Powder River Basin. The company aims to assist mineral rights owners and landowners in achieving their financial goals by providing fair valuations and facilitating the sale of their interests. With a commitment to sustainable investments, Rocking WW Minerals employs a technical-driven approach to assess the value of mineral assets, focusing on geology, engineering, and drill timing. Their operations contribute to a broader portfolio that spans various key regions, including Appalachia, through their parent company.


10. Rocky Mountain Oilfield Warehouse

  • Website: rmow.com
  • Ownership type: Private
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1954
  • Headcount: 11-50
  • LinkedIn: rocky-mountain-oilfield-warehouse

Rocky Mountain Oilfield Warehouse (RMOW) is a private company based in Casper, Wyoming, specializing in oilfield services and equipment. Established in 1954 by P.H. Cooper, RMOW has grown from a small operation to a company with 23 employees across four locations. The firm provides a range of products and services, including drilling equipment and relief valve servicing, catering to the needs of businesses in the oil and gas industry. RMOW is recognized as a National Board Certified company, ensuring high standards in their relief valve services. Their focus on quality and integrity has helped them maintain a strong reputation in the market. With a commitment to optimizing client operations, RMOW distributes products from over 20 manufacturers, making it a one-stop shop for various production needs. Their skilled field service technicians offer on-site troubleshooting and repair services across the Rocky Mountain region, further solidifying their role in the industry.


11. Prairie Field Services


Prairie Field Services, founded in 2011 and based in Casper, Wyoming, is a private logistics company that specializes in oil and water hauling services. With a workforce of approximately 70 employees, the company operates in some of the most productive energy regions in the United States, including the Powder River Basin and the Delaware Basin. Prairie Field Services has built a reputation for reliability in an industry often characterized by unpredictability. They focus on safety and operational excellence, ensuring that essential resources are delivered on time. The company has expanded its operations over the years, launching its water hauling services in 2018 and continuing to grow its footprint in the oil logistics sector. Their commitment to environmental responsibility and employee support further enhances their standing in the industry.


12. PSI Energy Production Services

  • Website: psienergy.com
  • Ownership type: Private
  • Headquarters: Cheyenne, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2012
  • Headcount: 1-10
  • LinkedIn: psi-energy-production-services

PSI Energy Production Services, founded in 2012 and based in Cheyenne, Wyoming, is an energy services company that specializes in production testing and flowback services tailored for the oil and gas industry. The company offers a comprehensive range of services, including well data collection, in-line testing, and frac flowback support. Their operations are characterized by a strong emphasis on safety and the use of advanced technology, ensuring that they meet the rigorous demands of their clients. PSI's clientele primarily consists of businesses within the oil and gas sector that require reliable and efficient operational support. With a small team of dedicated professionals, PSI is committed to delivering best-in-class service while maintaining a focus on environmental health and safety standards. Their equipment is state-of-the-art, and they actively work to minimize environmental impacts during their operations, showcasing their commitment to responsible energy production.


13. Cannon Oil & Gas Well Service, INC.

  • Website: cannonoilandgas.com
  • Ownership type: Corporate
  • Headquarters: Rock Springs, Wyoming, United States (USA)
  • Employee distribution: Indonesia 50%, United States (USA) 50%
  • Latest funding: August 2022
  • Founded year: 1978
  • Headcount: 11-50
  • LinkedIn: cannon-oil-%26-gas-well-service-inc.

Cannon Oil & Gas Well Service, INC. is an oil and gas service company based in Rock Springs, Wyoming. Founded in 1978, the company specializes in a range of well servicing solutions, including workover, completion, and abandonment services. With a modern fleet of rigs and a team of experienced personnel, Cannon Oil & Gas operates across various locations in the United States, particularly in the Rocky Mountain and Appalachia regions. They have established a reputation for quality service, having worked with major industry players like Shell, Chevron, and ConocoPhillips. The company emphasizes health, safety, and environmental standards, ensuring that all operations are conducted with the utmost care for personnel and the environment. Their community involvement reflects a commitment to supporting local initiatives and organizations, further solidifying their role in the industry.


14. Absaroka Energy and Environmental Solutions, LLC.


Absaroka Energy and Environmental Solutions, LLC is a consulting firm based in Buffalo, Wyoming, founded in 2016. The company operates primarily in the Rocky Mountain region and offers a range of services tailored to the oil and gas, mining, and utility sectors. Their expertise lies in planning, permitting, and regulatory compliance, which are essential for companies navigating the complexities of environmental regulations. Absaroka's team consists of industry-respected professionals who work closely with clients to deliver comprehensive solutions from the initial planning stages of new developments to the retirement of legacy assets. They have established a strong presence in key areas such as the Powder River and Denver-Julesburg basins, as well as in Montana, the Dakotas, Oklahoma, and Texas. Their commitment to sustainable practices and effective regulatory compliance makes them a valuable partner for companies in the oil and gas industry.


15. Koltek Energy Services

  • Website: koltek.com
  • Ownership type: Private
  • Headquarters: Casper, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2011
  • Headcount: 51-200
  • LinkedIn: koltek-energy-services

Koltek Energy Services, based in Casper, Wyoming, is a private oil and gas service company founded in 2011. The firm specializes in directional drilling and well services, providing advanced equipment and experienced operators to optimize drilling operations. Koltek's offerings include drilling rigs, well service rigs, and oilfield testing capabilities, all designed to enhance production efficiency while minimizing operational risks. The company prides itself on its safety protocols and innovative technologies, ensuring that its services meet the evolving needs of the oil and gas sector. With a workforce that boasts extensive experience, Koltek is committed to delivering high-quality service and operational excellence across various regions in the United States.


16. Epcon

  • Website: epconpartners.com
  • Ownership type: Private
  • Headquarters: Evanston, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 95%, Canada 5%
  • Founded year: 2008
  • Headcount: 201-500
  • LinkedIn: epcon-partners-inc-

Epcon Partners, founded in 2008 and based in Evanston, Wyoming, is a private engineering and construction firm that specializes in energy and infrastructure projects across the United States and Canada. With a workforce of approximately 191 employees, Epcon provides a comprehensive suite of services including engineering, procurement, and construction (EPC), workforce solutions, steep slope construction expertise, and inspection services. The company has successfully completed over 1,000 complex projects, primarily in the oil and gas sector, but also expanding into renewable energy initiatives. Their portfolio includes significant projects such as pipeline construction, processing facilities, and solar energy installations. Epcon emphasizes safety and quality, maintaining an A+ rating in safety programs and training, which underscores their commitment to operational excellence. They aim to build long-term relationships with clients, focusing on delivering projects efficiently and under budget.


17. D&D Oilfield Service


D&D Oilfield Service, based in Wamsutter, Wyoming, has been a family-owned entity since its inception in 1979. Originally starting as a forklift service, the company has evolved to offer a wide range of oilfield services, including construction, trucking, welding, and earthwork. Over the years, D&D has built a solid reputation for quality and safety, which is crucial in the oil and gas industry. They have been involved in various projects, such as constructing parking lots, retaining walls, and extensive condensate collection systems. Their commitment to the oil and gas sector is evident in their specialized services that cater to the operational needs of businesses in this field.


18. Oram & Houghton, PLLC

  • Website: oram-houghton.com
  • Ownership type: Private
  • Headquarters: Sheridan, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2013
  • Headcount: 11-50
  • LinkedIn: oram-%26-houghton-pllc

Oram & Houghton, PLLC is a boutique law firm based in Sheridan, Wyoming, established in 2013. The firm specializes in natural resources law, with a strong emphasis on the oil and gas sector. They provide a range of legal services, including title examination, regulatory representation, and assistance with natural resource transactions. Their clientele primarily consists of oil and gas operators and mineral owners who require expert legal guidance to navigate the intricate legal frameworks surrounding property and resource transactions. The firm prides itself on delivering high-quality service, characterized by timely communication and a commitment to addressing client needs effectively. With a team of experienced attorneys, Oram & Houghton is well-versed in the legal intricacies of the energy sector, ensuring that their clients can operate smoothly without legal hindrances.


19. WellDog

  • Website: welldog.com
  • Ownership type: Venture Capital
  • Headquarters: Laramie, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 91%, Australia 9%
  • Latest funding: Other (Debt), $4.2M, March 2016
  • Founded year: 1999
  • Headcount: 51-200
  • LinkedIn: welldog

WellDog, founded in 1999 and based in Laramie, Wyoming, is an energy services company that specializes in subsurface data collection and carbon management solutions. The company provides innovative services to the oil and gas industry, helping clients monitor subsurface conditions and enhance operational efficiency. WellDog's offerings include advanced technologies for tracking carbon dioxide and understanding subsurface processes, which are critical for effective resource management and environmental compliance. With a workforce of around 51-200 employees, WellDog has established itself as a key player in the sector, particularly in the areas of carbon capture and subsurface monitoring. The company has received funding, with a notable amount of $4.25 million reported in 2016, indicating investor confidence in its business model and growth potential.


20. D.R. Griffin & Associates, INC.

  • Website: drg-wy.com
  • Ownership type: Private
  • Headquarters: Rock Springs, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1978
  • Headcount: 11-50
  • LinkedIn: d-r-griffin-%26-associates-inc.

D.R. Griffin & Associates, INC. is an engineering and surveying firm based in Rock Springs, Wyoming, with a history dating back to 1978. The company specializes in providing professional services tailored to the oil and gas industry, including engineering design, land surveying, drafting, and project management. Their clientele primarily consists of businesses involved in pipeline and utility projects, reflecting their deep-rooted expertise in these areas. The firm employs a team of licensed Professional Land Surveyors and Professional Engineers, ensuring that they meet the technical demands of their projects. D.R. Griffin & Associates has developed a robust inventory of modern equipment and technology, enabling them to efficiently handle a range of projects, from small individual tasks to extensive pipeline developments. Their commitment to safety and compliance with industry standards further underscores their relevance in the oil and gas sector.


21. Acquire Oilfield Solutions, LLC.

  • Website: acquireoil.com
  • Ownership type: Private
  • Headquarters: Guernsey, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2018
  • Headcount: 51-200
  • LinkedIn: acquire-oilfield-solutions

Acquire Oilfield Solutions, LLC. is an oilfield services company based in Guernsey, Wyoming, established in 2018. The firm specializes in acidizing and logistics, providing vital services to the oil and gas industry. Their offerings include fracturing services and the transportation of hazardous materials, ensuring that operations are conducted safely and efficiently. With a team of experienced personnel and a fleet of high-quality equipment, Acquire Oilfield Solutions caters primarily to businesses involved in oil extraction. The company emphasizes safety, meeting or exceeding all certification and testing requirements, and is a member of ISNetworld, which underscores their commitment to maintaining high safety standards. Their operational capabilities include a range of completions from vertical to multi-well pads, utilizing various fluid systems. The company is staffed by HAZMAT licensed personnel, allowing for 24/7 access to acid and chemical transport, further solidifying their role in the oilfield services sector.


22. Mountain Mud

  • Website: mtnmud.com
  • Ownership type: Private
  • Headquarters: Gillette, Wyoming, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2006
  • Headcount: 201-500
  • LinkedIn: mountainmud

Mountain Mud Service & Supply, Inc., based in Gillette, Wyoming, is a private company that specializes in providing drilling fluids and oilfield services. Founded in 2006, it has roots dating back to 1978 when it began as a mud hauling company. Over the years, Mountain Mud has evolved into a full-service drilling fluid supply company, catering to the needs of the oil and gas extraction industry. They offer a comprehensive range of products, including standard and specialty drilling mud, cementing equipment, and erosion control solutions. Their operational capabilities are enhanced by a private fleet that allows for 24/7 delivery and support. Mountain Mud also operates a fully functional mud lab, where they conduct rigorous testing and engineering support for drilling operations. Their commitment to safety is evident, having operated with no lost time accidents since the ownership change in 2006. With a focus on customer service and technical support, Mountain Mud serves a variety of clients, from small businesses to larger corporations, across multiple states in the U.S.



Oil And Gas Insights: Key Companies in Wyoming


CompanyHeadquarterSizeFoundedOwnership
M & K Oil Company, LLCGillette, Wyoming, United States (USA)51-2001974Private
Freedom Fuels USA, IncCasper, Wyoming, United States (USA)11-502019Private
Unit Drilling CoCasper, Wyoming, United States (USA)201-5001963Private
True Oil LLCCasper, Wyoming, United States (USA)501-10001948Family Owned
Homax Oil Sales, Inc.Casper, Wyoming, United States (USA)51-2001978Private
SOS Well Services, LLCLa Barge, Wyoming, United States (USA)51-2002000Private
Cyclone Drilling IncGillette, Wyoming, United States (USA)501-10001975Family Owned
Texhoma Land ConsultantsGillette, Wyoming, United States (USA)201-5001991Private
Rocking WW Minerals, LLCSheridan, Wyoming, United States (USA)11-502018Private
Rocky Mountain Oilfield WarehouseCasper, Wyoming, United States (USA)11-501954Private
Prairie Field ServicesCasper, Wyoming, United States (USA)201-5002011Private
PSI Energy Production ServicesCheyenne, Wyoming, United States (USA)1-102012Private
Cannon Oil & Gas Well Service, INC.Rock Springs, Wyoming, United States (USA)11-501978Corporate
Absaroka Energy and Environmental Solutions, LLC.Buffalo, Wyoming, United States (USA)11-502016Private
Koltek Energy ServicesCasper, Wyoming, United States (USA)51-2002011Private
EpconEvanston, Wyoming, United States (USA)201-5002008Private
D&D Oilfield ServiceWamsutter, Wyoming, United States (USA)11-501979Family Owned
Oram & Houghton, PLLCSheridan, Wyoming, United States (USA)11-502013Private
WellDogLaramie, Wyoming, United States (USA)51-2001999Venture Capital
D.R. Griffin & Associates, INC.Rock Springs, Wyoming, United States (USA)11-501978Private
Acquire Oilfield Solutions, LLC.Guernsey, Wyoming, United States (USA)51-2002018Private
Mountain MudGillette, Wyoming, United States (USA)201-5002006Private


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