Declan Joseph Slattery

Smedvig AS performs investment portfolio services. The firm invests across a range of asset classes and has considerable experience in investing in the natural resources sector globally. It offers direct investments within property, private equity, episodic and thematic investments, and invests with private equity funds, long only funds, and hedge funds. The company was founded in 1989 and is headquartered in Stavanger, Norway.

TGS Geophysical Co. (UK) Ltd. develops and installs fiber-sensing technology. The company was founded in 2001 and is headquartered in Surbiton, the United Kingdom.

Stingray Ltd. manufactures musical instruments. The private company is based in London, UK.

Onesubsea Operations Ltd. develops subsea oilfield equipment. Its products include MARS production optimization modules and production optimization simulation software. The firm services include reservoir management, subsea engineering, and subsea pumping and process systems. The company was founded in May, 1999 by Ian Donald and is headquartered in Portlethen, the United Kingdom.

Procom Venture AS is an independent venture capital firm founded in 2002. The firm is headquartered in Stavanger, Norway.

Ziebel AS develops fiber optic intervention technology. It designs and manufactures wireless real time permanent gauges for oilfield applications. The firm offers artificial lift solutions such as umbilical wire replaceable electrical down hole pumps and industrial solutions, including torque loggers, controllers, pressure test systems and custom industrial systems. The company was founded by Henning Hansen and David Stanly Ottesen on January 2, 2006 and is headquartered in Tananger, Norway.

Caltec Ltd. designs, develops and supplies equipment for facilitating production from oil and gas wells. Its solutions include flare recovery, de-gassing liquids, and sand separation. The company was founded in 2003 and is headquartered in Cranfield, UK

Zeropex AS manufactures equipment for generating renewable energy from the pressure drop in water systems while improving management of pressure and flow in such networks. Its product Difgen, is a high-performance hydropower generator which also functions as a pressure reduction valve (PRV) for use in water systems and similar applications. It comprises a turbine, a generator and a control system. The firm also manufactures in-pipe micro turbines proven in water industry use. Its micro turbines also operate as a smart control valve which is able to manage both pressure and flow in water networks. The firm offers site surveys with survey report and recommendations, installation design, installation and commissioning and service agreements. The company was founded by Trond Melhus, Per Reidar Ørke and Jan Kristian Vasshus in 2006 and is headquartered in Stavanger, Norway.

Reality Mobile LLC provides mobile video and communications solutions. It offers RealityVision, a mobile collaboration software platform which gives users access to video, data, and sensors, as well as allows sharing of live videos, mission-critical data, and global positioning system tracking. The company was founded by David Joshua Kramer and David K. Rensin in 2003 and is headquartered in Bethesda, MD.

Produced Water Absorbents, Inc. provides waste treatment solutions and services to the oil and gas industry. It's services include mixing technologies, energy, water technologies, and integration. The company was founded in June 2005 and is headquartered in Houston, TX.

Zilift Ltd. develops and markets permanent magnet technologies for artificial lift applications. Its technologies include Zilift TorqueDrive and Zilift SpeedDrive. The firm covers permanent magnet motor and pump technology, fluid dynamics, material science, rotor dynamics, high temperature electronics, variable frequency drive, software and control systems, and well engineering. The company was founded by in May 2009 and is headquartered in Aberdeen, the United Kingdom.

Abrado, Inc. provides cleanout tools, chemical stimulation treatments and diagnostic technology services to the drilling sector. It offers well abandonment, and section milling services. The company was founded by Alexander Esslemont and C. Mitchell Cox in 2009 and is headquartered in Houston, TX.

Halfwave AS provides advanced inspection services based on acoustic resonance technology to the oil & gas industry. It offers pipeline and subsea inspections. The company was founded on June 10, 2011 and is headquartered in Ovre Ervik, Norway.

Prosep USA, Inc. provides integrated oil, gas and water separation solutions. The firm provides field service equipment and technicians to solve operational issues, commission equipment and optimize current operations. Its services can also provide replacement media’s for both gas and produced water streams such as activated carbon, charcoal, nutshell filter media and ceramic media. The company was founded in 2005 and is headquartered in Houston, TX.

SageRider, Inc. operates as an independent oil and gas service company. The firm provides real-time reservoir monitoring tools and completion technologies. It offers Sage Watch subsurface surveillance and permanent monitoring system to provide continuous real-time pressure and temperature data for various reservoir sections simultaneously. The company was founded by Stanley Jay Wall in 2008 and is headquartered in Stafford, TX.

FourPhase AS provides sand and sediments removal products for oil and gas production. It specializes in optimizing oil and gas production by reducing sediments from the production flow. The firm optimization is achieved by using a dynamic desander system allowing higher production within defined sediments-criteria. It supplies dynamic desander systems in the market. The company was founded by Øyvind Hansen Heradstveit, Jarle Kvamme, Anders Mathias Arefjord, and Jarle Nytræ in January 2012 and is headquartered in Kokstad, Norway.

Tattva Group engages in oil and gas, education, healthcare, infrastructure, shipping and scientific and technological services. The company was founded in August 2009 by N. Ramachandran and is headquartered in Chennai, India.

Part of Hicks Holdings LLC, Casing Technologies Group Ltd. is a holding British company that provides business support services. The company is based in Westhill, UK. The company was founded in 2007. Casing Technologies Group was acquired by Drilling Tools International Corp. (US) on March 18, 2024 for $0.32 million.

Enhanced Well Technologies AS engages in the investing business. It invests in oilfield service companies. The company was founded on March 13, 2019 and is headquartered in Stavanger, Norway.

Part of Havens Hospices Trading Co. Ltd., Havens Development Co. Ltd. provides business support services. The company is based in Aberdeen, UK and was founded in 2002.

Cereus Ultrasonics Ltd. is a British UK-based company that was founded in 2018. The company specializes in audio ultrasonics using the Cereus engine, which offers a diverse range of equalization techniques. The techniques used at Cereus Ultrasonics were first developed to improve tracking and implementation of drug delivery significantly.