Well logging services involve the collection and analysis of data from oil and gas wells to optimize production and ensure efficiency. Companies in this sector provide essential techniques, including mud logging, cased hole logging, and data assessment. This field is evolving with advancements in technology, allowing for improved data accuracy and real-time monitoring capabilities. As energy demands shift, well logging firms are increasingly focusing on sustainable practices and integrating digital solutions, making them key players in transition towards more efficient and environmentally conscious resource extraction.

The well logging service companies listed here vary significantly in size, with workforces ranging from small teams to several thousand employees. Headquartered across major oil and gas hubs like the United States, the United Kingdom, and Canada, these firms have been established from as early as 1953 to as recently as 2016. Their range of services often includes wireline operations, geological consulting, and advanced data logging, catering to the specialized demands of the energy sector.

Continue reading to discover the top well logging service companies.

Top 24 Well Logging Services Companies

1. Renegade Services

• Website: renegadewls.com
• Ownership type: Private
• Headquarters: Levelland, Texas, United States (USA)
• Employee distribution: United States (USA) 97%, Other 3%
• Founded year: 2009
• Headcount: 501-1000
• LinkedIn: renegade-wls

Renegade Services, founded in 2009 and headquartered in Levelland, Texas, is an oilfield service company that specializes in wireline operations and well integrity evaluation. With a workforce of approximately 256 employees, the company has grown significantly since its inception, now operating across all major oil and gas basins in the United States and extending its services internationally. Renegade offers a comprehensive range of services, including cased hole logging, production logging, and well intervention, aimed at enhancing operational efficiency and safety for its clients in the oil and gas industry. The company prides itself on its commitment to safety, having developed various safety innovations and training programs. Renegade's focus on customer service and quick response times, along with its investment in advanced technology, positions it as a notable player in the well logging sector.

2. Excellence Logging

• Website: exlog.com
• Ownership type: Private
• Headquarters: London, England, United Kingdom (UK)
• Employee distribution: Saudi Arabia 16%, Kuwait 12%, Oman 8%, Other 64%
• Founded year: 2015
• Headcount: 1001-5000
• LinkedIn: excellence-logging

Excellence Logging is an oilfield services company based in London, UK, specializing in optimizing well performance through advanced data logging, well intervention, and consultancy services. Founded in 2015, the company has rapidly grown to employ around 880 professionals, with a significant presence in the Middle East, particularly in Saudi Arabia, Kuwait, and Oman. Excellence Logging provides critical insights and operational support to clients in the oil and gas industry, enhancing drilling efficiency and safety. Their service portfolio includes surface data logging, well remediation, and data consultancy, all aimed at improving well operations. The company has logged over 7,150 wells and transmitted more than 40 million feet of data since its inception, showcasing its active role in the industry. Excellence Logging is committed to safety and compliance, as reflected in their impressive safety performance metrics. They continue to innovate and adapt to the evolving needs of the energy sector, positioning themselves as a trusted partner for companies seeking to enhance their well operations.

3. PetroServices GmbH

• Website: petroservices.de
• Ownership type: Private
• Headquarters: Cairo, Cairo Governorate, Egypt
• Employee distribution: Egypt 44%, Pakistan 26%, Oman 13%, Other 17%
• Founded year: 2001
• Headcount: 501-1000
• LinkedIn: petroservices-gmbh

PetroServices GmbH is an oil and gas service company founded in 2001 and headquartered in Magdeburg, Germany. With a workforce of approximately 779 employees, the company operates in over 50 countries, including Egypt, Pakistan, Oman, and Iraq. PetroServices specializes in providing essential services such as mud logging, geological services, and drilling engineering. Their mud logging services include the manufacture and assembly of certified mud logging cabins and advanced data acquisition systems. The company is dedicated to enhancing operational efficiency and safety for its clients in the oil and gas industry. PetroServices is also committed to quality assurance and has received several certifications, including ISO 9001 and OHSAS 18001, which reflect their adherence to industry standards. Their extensive experience and focus on training further bolster their capabilities in the sector.

4. READ Cased Hole

• Website: readcasedhole.com
• Ownership type: Private Equity
• Headquarters: Aberdeen, Scotland, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 76%, United States (USA) 24%
• Latest funding: December 2016
• Founded year: 1990
• Headcount: 11-50
• LinkedIn: read-cased-hole

READ Cased Hole, based in Aberdeen, Scotland, is a private equity-owned company that has been providing specialized services in the energy sector since 1990. With a workforce of around 49 employees, the company focuses on cased hole logging and well integrity evaluation. Their service offerings include production logging, correlation, and equipment rentals, which are essential for operators and service companies in the oil and gas industry. READ Cased Hole's expertise is crucial for optimizing well performance and effectively managing operational risks. They operate globally, with a significant presence in the UK and the USA, and have established partnerships with various service companies to enhance their service delivery. Their commitment to utilizing cutting-edge technologies and providing tailored solutions positions them as a valuable partner in the well logging sector.

5. Stratagraph Energy Group

• Website: stratagraph.com
• Ownership type: Family Owned
• Headquarters: Lafayette, Louisiana, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1961
• Headcount: 51-200
• LinkedIn: stratagraph-inc-

Stratagraph Energy Group, based in Lafayette, Louisiana, has been a significant player in the mud logging and geological services sector since its inception in 1961. Founded by Billy J. Hagan, the company has grown from a small operation with basic logging units to a respected provider of real-time data solutions for the oil and gas industry. Stratagraph specializes in mud logging, geosteering, and wellsite geological services, offering clients accurate and reliable information to support safe and efficient drilling operations. With a workforce of approximately 105 employees, the company has logged thousands of wells across major basins in the United States, including the Gulf Coast, Texas, and Oklahoma. Their advanced technology and experienced personnel enable them to deliver critical data that helps clients make informed operational decisions. Stratagraph's commitment to safety is reflected in their impressive safety ratings, and their family-owned structure fosters a strong client-centric approach.

6. Ardyne Technologies

• Website: ardyne.co
• Ownership type: Private
• Headquarters: Aberdeen, Scotland, United Kingdom (UK)
• Employee distribution: United Kingdom (UK) 100%
• Founded year: 2015
• Headcount: 51-200
• LinkedIn: ardyne-technologies

Ardyne Technologies, founded in 2015 and based in Aberdeen, Scotland, is a private company that focuses on providing advanced logging and reservoir monitoring technologies for the oil and gas sector. The company offers a range of services that include cased hole logging, formation evaluation, and well integrity monitoring. These services are crucial for ensuring the efficiency and safety of oil and gas operations. Ardyne Technologies primarily serves clients in the oil, gas, and geothermal industries, contributing to the optimization of resource extraction and management. With a workforce of around 71 employees, the company is positioned to address the specific needs of its clients in a competitive market.

7. RECON Petrotechnologies

• Website: reconpetro.com
• Ownership type: Private
• Headquarters: Calgary, Alberta, Canada
• Employee distribution: Canada 46%, United States (USA) 46%, Brazil 8%
• Founded year: 2001
• Headcount: 11-50
• LinkedIn: recon

RECON Petrotechnologies, based in Calgary, Alberta, is an oilfield service company that has been active since 2001. The firm specializes in well logging services, focusing on Open Hole and Cased Hole logging. They provide high-resolution data and petrophysical analysis, which are essential for oil and gas producers to assess their wells and manage reserves effectively. RECON is recognized for its innovative approach, particularly with its proprietary HDDTM (High Definition Data) technology, which offers the highest resolution data sampling rates in the industry. This capability allows for a more detailed and accurate view of wellbores, making it a valuable resource for clients. The company operates primarily in North America, with a workforce that is evenly distributed between Canada and the United States, and a smaller presence in Brazil. RECON's dedication to customer service and operational efficiency has earned them a growing client base among North American producers.

8. Geosplit

• Website: geosplit.org
• Ownership type: Private
• Headquarters: Dubai, Dubai, United Arab Emirates (UAE)
• Employee distribution: Russia 65%, China 35%
• Founded year: 2013
• Headcount: 51-200
• LinkedIn: geosplit

Geosplit LLC, founded in 2013 and based in Dubai, UAE, is an oilfield services company that focuses on advanced technologies tailored for the oil and gas sector. With a workforce of around 51-200 employees, the company has carved out a niche in production logging solutions and well integrity services. Geosplit emphasizes continuous improvement through research and development, which is evident in their innovative offerings like the Quantum Marker-Reporters. These technologies are designed to optimize recovery rates and enhance operational efficiency for their clients. Geosplit's commitment to scientific research and field testing underpins their business model, ensuring they remain relevant in a competitive market. Their geographical employee distribution, with a significant presence in Russia and China, further highlights their international reach and expertise in the industry.

9. Reliance Oilfield Services

• Website: relianceofs.com
• Ownership type: Private
• Headquarters: Calgary, Alberta, Canada
• Employee distribution: Canada 45%, India 29%, United States (USA) 26%
• Founded year: 2004
• Headcount: 201-500
• LinkedIn: reliance-pressure-control-and-well-testing

Reliance Oilfield Services, based in Calgary, Alberta, is a private company founded in 2004. It specializes in wireline and cased hole services tailored for the oil and gas industry. The company offers a comprehensive suite of services, including slickline, electric line, fiber optics, and well optimization, aimed at improving operational efficiency and safety for its clients. Reliance serves a variety of customers in the oil and gas sector, providing reliable and specialized solutions. With a workforce of approximately 293 employees, the company has established a significant presence in Western Canada, covering regions from South East Saskatchewan to North East British Columbia. Their management and field personnel have a wealth of experience, having worked together through various company transformations. Reliance is committed to safety, as evidenced by their Mission Zero program, which emphasizes zero incidents and environmental accountability. They have not reported any recent funding, indicating a stable operational model without external financial dependencies.

10. HLS Asia Limited

• Website: hlsasia.com
• Ownership type: Private
• Headquarters: Noida, Uttar Pradesh, India
• Employee distribution: India 95%, Other 5%
• Founded year: 1985
• Headcount: 201-500
• LinkedIn: halliburton-logging-services-asia-ltd

HLS Asia Limited, formerly known as HLS India Limited, is a private oilfield services company based in Noida, Uttar Pradesh, India. Founded in 1985, the company has built a strong reputation in the oil and gas industry, particularly in wire-line logging and related services. HLS Asia Limited has been providing essential services to exploration and production companies since 1987, utilizing advanced technology and equipment primarily sourced from their collaboration with Halliburton Energy Services Inc., one of the largest oilfield service companies globally. Their service offerings include open-hole and cased-hole logging, slickline services, and data processing and interpretation. The company has a significant presence in India, with a workforce of approximately 470 employees, and has also extended its services to international clients in various countries. HLS Asia Limited is committed to maintaining high standards of health, safety, and environmental management, ensuring that their operations align with international standards. Their client base includes notable national and multinational companies, reflecting their capability and reliability in the industry.

11. Diversified

• Website: dwl-usa.com
• Ownership type: Private Equity
• Headquarters: Reserve, Louisiana, United States (USA)
• Employee distribution: United States (USA) 88%, Saudi Arabia 5%, Mexico 3%, Other 4%
• Latest funding: March 2012
• Founded year: 1952
• Headcount: 201-500
• LinkedIn: diversified-well-logging-inc

Diversified Well Logging, based in Reserve, Louisiana, is a private equity-owned service company that has been active in the oil and gas industry since 1952. With a workforce of approximately 244 employees, the company specializes in a range of well logging services, including classic mudlogging, fluid and gas analysis, and geosteering. Their operations extend primarily across the United States, with a notable presence in major unconventional shale basins such as the Permian Basin and the Appalachian region. Diversified is recognized for its innovative approach, particularly with the introduction of the RoboLogger™, an automated sample collection device that enhances data collection efficiency. The company prides itself on delivering high-quality geological data and analysis, which helps clients optimize their drilling operations and reduce costs. Their commitment to safety, efficiency, and technological advancement underscores their role as a reliable partner in the oil and gas sector.

12. Well Services of Iran (Schlumberger Methods) WSI

• Website: wsi-oilfield.com
• Ownership type: Private
• Headquarters: Tehran, Tehran, Iran
• Employee distribution: Iran 100%
• Founded year: 1977
• Headcount: 201-500
• LinkedIn: well-services-of-iran-schlumberger-methods-

Well Services of Iran (Schlumberger Methods) WSI, founded in 1977 and based in Tehran, Iran, is a private oilfield services company that provides a comprehensive suite of solutions tailored for the oil and gas industry. With a workforce of approximately 173 employees, WSI specializes in wireline logging, stimulation services, and well completions, among other offerings. Their wireline logging services include both open hole and cased hole services, which are essential for evaluating the geological formations surrounding oil and gas wells. WSI also engages in advanced stimulation techniques, such as hydraulic fracturing and matrix acidizing, to enhance well productivity. The company operates significant facilities, including a major oilfield services base on Kish Island, which supports their operations with state-of-the-art equipment and laboratories. WSI's commitment to quality is reflected in their adherence to international standards, including their ISO 9001:2015 certification. This focus on quality management and safety positions WSI as a competent service provider in the Iranian oil and gas sector.

13. Geo-Link, Inc

• Website: geo-link.net
• Ownership type: Private
• Headquarters: Red Lodge, Montana, United States (USA)
• Employee distribution: United States (USA) 86%, Denmark 14%
• Founded year: 2000
• Headcount: 11-50
• LinkedIn: geo-link

Geo-Link, Inc. is a geological consulting company based in Red Lodge, Montana, founded in 2000. The firm specializes in mud logging, wellsite geology, and geosteering services tailored for the oil and gas industry. With a team led by Rob Adams, who has over 30 years of experience in the field, Geo-Link provides critical data and insights that help clients optimize their drilling operations. The company serves a range of clients across various basins in the Rocky Mountain region, including well-known names like BP America and Encana. Geo-Link is committed to delivering reliable data and professional service, ensuring that their clients achieve the highest possible return on their investments in drilling activities. Their operations include both manned and automated logging services, and they utilize advanced instrumentation to ensure quality data acquisition.

14. Cygnet Software

• Website: cygnet.com
• Ownership type: Private
• Headquarters: Houston, Texas, United States (USA)
• Founded year: 1994
• Headcount: 1-10
• LinkedIn: cygnet-software

Cygnet Software, also known as Probe Technologies Holdings, Inc., was founded in 1994 and is based in Houston, Texas. The company specializes in advanced logging and monitoring technologies for the oil, gas, and geothermal sectors. They provide a variety of services, including cased hole logging and well integrity solutions, which are crucial for businesses looking to optimize their operations and maintain the integrity of their wells. Their clientele primarily consists of companies in the oil and gas industry, indicating a strong focus on this sector. Cygnet Software has developed a range of innovative tools and technologies that enhance well monitoring and evaluation, contributing to improved operational efficiency and safety in well management.

15. Eastern United Petroleum Services

• Website: easternutd.com
• Ownership type: Private
• Headquarters: Ahmadi, Al Ahmadi Governorate, Kuwait
• Employee distribution: Kuwait 98%, Oman 2%
• Founded year: 2004
• Headcount: 51-200
• LinkedIn: eastern-united-petroleum-services

Eastern United Petroleum Services (EUPS), founded in 2004 and based in Ahmadi, Kuwait, is a private company that specializes in petroleum services. With a workforce of approximately 91 employees, EUPS provides a comprehensive suite of solutions tailored for the oil and gas industry. Their service portfolio includes wireline services, well testing, and consulting, all aimed at improving production efficiency and resolving operational challenges faced by their clients. EUPS operates primarily in Kuwait, with a small presence in Oman, and is committed to leveraging innovative technologies to deliver high-quality service. The company has developed a reputation for its expertise in well logging, offering services such as cased hole logging, open hole logging, and slickline services. Their focus on new technologies, including advanced logging tools and data interpretation services, positions them as a relevant player in the well logging sector.

16. Wireline Logging Solutions

• Website: wirelinelogs.com
• Ownership type: Private
• Headquarters: Houston, Texas, United States (USA)
• Employee distribution: United States (USA) 83%, United Kingdom (UK) 17%
• Founded year: 2010
• Headcount: 201-500
• LinkedIn: wireline-logging-solutions

Wireline Logging Solutions, based in Houston, Texas, is a private company that specializes in wireline services for the oil and gas industry. Founded in 2010, the company has carved out a niche in providing formation evaluation and well integrity assessments. They utilize advanced logging technologies to help clients optimize their drilling and completion processes. With a workforce of approximately 201-500 employees, Wireline Logging Solutions operates primarily in the United States, with a smaller presence in the United Kingdom. Their service offerings include a variety of logging techniques such as pulsed neutron, resistivity micro imaging, and dual laterolog, among others. The company has built a reputation for safety and efficiency, emphasizing rigorous training for their crews and a commitment to high service quality. They operate in major oil-producing basins, including the Permian and Eagle Ford, which positions them strategically within the industry.

17. MapsaKish (Kish Abdal Industrial Project Management)

• Website: mapsakish.com
• Ownership type: Private
• Headquarters: Kish, Hormozgan, Iran
• Employee distribution: Iran 100%
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: mapsakish

MapsaKish, officially known as Kish Abdal Industrial Project Management, is an oil and gas service company based in Kish Island, Iran. Founded in 2009, the company has carved out a niche in the oil and gas sector by providing specialized services, particularly in mud logging and H2S safety. Mud logging is critical for analyzing geological data during drilling, helping clients make informed decisions about their operations. MapsaKish operates with a team of experienced professionals, many of whom have over 20 years in the industry. The company has established a robust infrastructure, including a dedicated base on Kish Island, which supports their operations and enhances their service delivery. They have successfully completed numerous projects for notable clients in the region, showcasing their capability and commitment to safety and efficiency in drilling activities.

18. Gasway LLC

• Website: gasway.net
• Ownership type: Private
• Headquarters: Muscat, Muscat Governorate, Oman
• Employee distribution: Oman 100%
• Founded year: 2009
• Headcount: 51-200
• LinkedIn: gasway-llc

Gasway LLC, founded in 2009 and based in Muscat, Oman, is a private oil and gas service company that specializes in wellbore integrity monitoring, production logging, and gyro surveying. The company serves oil and gas operators by providing advanced tools and expertise aimed at enhancing drilling efficiency and ensuring well integrity. With a workforce that is entirely Omani, Gasway is committed to supporting the local industry while maintaining high standards in health, safety, and environmental practices. Their services include the use of cutting-edge technology for continuous and multi-shot surveying, as well as production logging tools that measure various parameters critical to well performance. Gasway's focus on quality and safety, combined with their innovative solutions tailored to client needs, positions them as a significant player in the oil and gas service sector in Oman.

19. Geowellex Drilling and Geology Automation

• Website: geowellex.com
• Ownership type: Private
• Headquarters: Centro, Rio De Janeiro, Brazil
• Employee distribution: Brazil 97%, Libya 3%
• Founded year: 2012
• Headcount: 51-200
• LinkedIn: geowellex

Geowellex Drilling and Geology Automation, founded in 2012 and based in Centro, Rio de Janeiro, Brazil, is a private company that specializes in geological services, particularly mud logging. With a workforce of approximately 88 employees, Geowellex has carved out a niche in the energy sector by offering real-time geological data and analysis to oil and gas operators. Their services are designed to enhance drilling efficiency and safety, utilizing proprietary technologies developed in-house. The company operates a dedicated tech center that fosters innovation and the development of advanced solutions, such as the Automated Mud Logging (AUTOMUD) and Gas Oil Logging While Drilling (GOLD). Geowellex is committed to operational excellence, focusing on quality, process management, and strong customer relationships. Their expertise in geological analysis and data integration positions them as a valuable partner for energy companies seeking to optimize their drilling operations.

20. Silvertip Completion Services

• Website: silvertipcompletions.com
• Ownership type: Corporate
• Headquarters: Midland, Texas, United States (USA)
• Employee distribution: United States (USA) 100%
• Latest funding: $30.0M, November 2022
• Founded year: 2017
• Headcount: 201-500
• LinkedIn: silvertip-completion-services

Silvertip Completion Services, founded in 2017 and based in Midland, Texas, is an oilfield services company that specializes in wireline and pumpdown services tailored for the oil and gas sector. Operating primarily in the Permian Basin, Silvertip provides essential services such as logging, perforating, and pressure control, which are vital for the efficient completion of wells. The company has developed a reputation for its focus on safety and sustainability, implementing practices that minimize environmental impact while maximizing operational efficiency. Silvertip's innovative offerings include the SilverShot perforating gun system, designed to enhance performance and reduce nonproductive time, and the SilverBolt electric wireline truck, which aims to cut emissions and fuel costs. In 2022, Silvertip received $30 million in funding, further solidifying its position in the industry and enabling continued growth and technological advancement. With a dedicated team and a commitment to customer partnership, Silvertip is well-positioned to meet the evolving needs of operators in the oil and gas industry.

21. Impac Exploration Services

• Website: impacxs.com
• Ownership type: Private
• Headquarters: Weatherford, Oklahoma, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1987
• Headcount: 51-200
• LinkedIn: impac-exploration-services

Impac Exploration Services, based in Weatherford, Oklahoma, is a private oil field service company that has been operational since 1987. With a workforce of approximately 110 employees, Impac specializes in geoscience services, particularly mud logging, geochemistry, and geosteering. The company plays a crucial role in the oil and gas industry by providing essential geological data and analysis that help clients optimize their drilling operations and manage risks effectively. Impac has participated in thousands of wells across multiple states, including Texas, New Mexico, and Pennsylvania, showcasing their extensive experience and regional expertise. Their commitment to high-quality results is supported by advanced technology and a focus on data integrity, making them a reliable partner for clients in the energy sector.

22. Precision Well Logging

• Website: pwl-inc.com
• Ownership type: Private
• Headquarters: Houston, Texas, United States (USA)
• Employee distribution: United States (USA) 100%
• Founded year: 1953
• Headcount: 11-50
• LinkedIn: precision-well-logging

Precision Well Logging Inc., based in Houston, Texas, has been a significant player in the oil and gas service industry since its inception in 1953. The company specializes in well logging and geological analysis, providing essential services such as mud logging and gas detection to a broad customer base that includes over 500 major oil companies and independent operators. Precision Well Logging operates 30 units, both onshore and offshore, and has logged over 5,000 wells across various geological formations. Their commitment to quality is underscored by a strong safety record and a focus on continuous improvement through research and development. Notably, they hold a patent for the first real-time computer-based mud logging system, showcasing their innovative approach to well logging services. The company prides itself on employing experienced personnel, many of whom have been with the firm for decades, ensuring a high level of expertise in their operations.

23. Horizon Well Logging, Inc.

• Website: horizon-well-logging.com
• Ownership type: Private
• Headquarters: Lompoc, California, United States (USA)
• Employee distribution: United States (USA) 90%, Kenya 10%
• Founded year: 1992
• Headcount: 11-50
• LinkedIn: horizon-well-logging-inc.

Horizon Well Logging, Inc. is a geological services company based in Lompoc, California, specializing in wellsite geology and mudlogging for the geothermal, oil, and gas industries. Founded in 1992, the company has built a reputation for providing real-time data and monitoring services that ensure safe and efficient drilling operations. With a team of seasoned geologists, many of whom hold advanced degrees, Horizon has successfully logged over 3,500 wells, including more than 1,000 horizontal wells. Their clientele includes a range of operators in the geothermal and oil sectors, who rely on Horizon's expertise for accurate geological analysis. The company has also made significant contributions to lithium exploration, reflecting its adaptability to emerging energy trends. Horizon's commitment to safety is evident in their nearly flawless safety record and their focus on independent monitoring and reporting of geological occurrences.

24. Well Logging Energy Technology (Pvt.) Ltd

• Website: iwles.com
• Ownership type: Private
• Headquarters: Pakistan
• Employee distribution: Pakistan 100%
• Founded year: 2016
• Headcount: 11-50
• LinkedIn: well-logging-energy-technology-pvt-ltd

Well Logging Energy Technology (Pvt.) Ltd, established in 2016, is an oilfield services company based in Pakistan. The firm specializes in well logging, reservoir monitoring, and explosive services tailored for the oil and gas industry. With a workforce of 26 employees, the company has made a mark as the first independent wireline and testing service provider in the country. They cater to major clients, including OGDCL and PPL, providing essential services that enhance well performance and ensure operational integrity. Their service portfolio includes cement evaluation, casing and tubing inspection, and advanced perforating techniques. The management team boasts over 100 years of combined experience in the oil and gas sector, underscoring their expertise and commitment to quality. Well Logging Energy Technology prioritizes health, safety, and environmental standards, aiming to create a safer workplace for employees and clients alike.

Well Logging Services Insights: Key Companies

Company	Headquarter	Size	Founded	Ownership
Renegade Services	Levelland, Texas, United States (USA)	501-1000	2009	Private
Excellence Logging	London, England, United Kingdom (UK)	1001-5000	2015	Private
PetroServices GmbH	Cairo, Cairo Governorate, Egypt	501-1000	2001	Private
READ Cased Hole	Aberdeen, Scotland, United Kingdom (UK)	11-50	1990	Private Equity
Stratagraph Energy Group	Lafayette, Louisiana, United States (USA)	51-200	1961	Family Owned
Ardyne Technologies	Aberdeen, Scotland, United Kingdom (UK)	51-200	2015	Private
RECON Petrotechnologies	Calgary, Alberta, Canada	11-50	2001	Private
Geosplit	Dubai, Dubai, United Arab Emirates (UAE)	51-200	2013	Private
Reliance Oilfield Services	Calgary, Alberta, Canada	201-500	2004	Private
HLS Asia Limited	Noida, Uttar Pradesh, India	201-500	1985	Private
Diversified	Reserve, Louisiana, United States (USA)	201-500	1952	Private Equity
Well Services of Iran (Schlumberger Methods) WSI	Tehran, Tehran, Iran	201-500	1977	Private
Geo-Link, Inc	Red Lodge, Montana, United States (USA)	11-50	2000	Private
Cygnet Software	Houston, Texas, United States (USA)	1-10	1994	Private
Eastern United Petroleum Services	Ahmadi, Al Ahmadi Governorate, Kuwait	51-200	2004	Private
Wireline Logging Solutions	Houston, Texas, United States (USA)	201-500	2010	Private
MapsaKish (Kish Abdal Industrial Project Management)	Kish, Hormozgan, Iran	51-200	2009	Private
Gasway LLC	Muscat, Muscat Governorate, Oman	51-200	2009	Private
Geowellex Drilling and Geology Automation	Centro, Rio De Janeiro, Brazil	51-200	2012	Private
Silvertip Completion Services	Midland, Texas, United States (USA)	201-500	2017	Corporate
Impac Exploration Services	Weatherford, Oklahoma, United States (USA)	51-200	1987	Private
Precision Well Logging	Houston, Texas, United States (USA)	11-50	1953	Private
Horizon Well Logging, Inc.	Lompoc, California, United States (USA)	11-50	1992	Private
Well Logging Energy Technology (Pvt.) Ltd	Pakistan	11-50	2016	Private

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