Westervelt Ballard

SESI Holdings, Inc. engages in the provision of oilfield services and equipment. It operates through the following segments: Drilling Products and Services, Onshore Completion and Workover Services, Production Services, and Technical Solutions. The Drilling Products and Services segment provides downhole drilling tools and surface rentals. The Onshore Completion and Workover Services segment offers pressure pumping, fluid management and workover services. The Production Services segment consists of intervention services. The Technical Solutions segment involves the products and services that address customer-specific needs with applications which typically require engineering, manufacturing, or project planning. The company was founded by Terence E. Hall in 1989 and is headquartered in Houston, TX.

Part of Superior Energy Services, Inc., Superior Energy Services Holdings Ltd. provides information technology and corporate services. The company is based in Aberdeen, UK. Founded in 1996.

Part of Superior Energy Services, Inc., Workstrings International Ltd. is a provider of downhole rental tubulars, accessories, and engineering expertise, servicing the entire life cycle of the well. Workstrings International is based in London, UK. The British company offers technical support during well planning and ongoing operations, as well as a list of engineering resources for tubulars. The company, founded in 1972, specializes in drill pipe mechanical properties and specifications. Workstrings International was acquired by P&O Oilfield Services Ltd. /Stapleton/ on September 01, 1996, for $58.14 million.

Part of Superior Energy Services, Inc., Superior Energy Services (UK) Ltd. is a private acquisition vehicle owned by Superior Energy Services. The company is based in Aberdeen, UK. Founded in 2009.