Nov. 27, 2006

Gray Energy Services LLC

Fort Worth, has announced the acquisition by its subsidiary, Gray Wireline Service Inc., of Southern Wireline Service Inc., a longstanding independent provider of cased-hole wireline services in the onshore and transition zone regions of the Gulf Coast and offshore Gulf of Mexico.

Southern Wireline Service Inc., founded in 1968, is based in Lafayette, La.

Gray Energy Services LLC was formed in early 2006 by Centre Partners, Centre Southwest Partners, and Gray Wireline Service Inc., as a platform to build a leading diversified provider of production enhancement solutions across the North American natural gas and oil production industry.

Invensys Group

Foxboro, Mass., has announced the appointment of Tom Kinney as director of performance services for the Process Systems Div. Kinney returns to Invensys after a stint as sales vice-president at ExperTune Inc. He had previously worked for Foxboro and Invensys for 22 years.

Invensys Group, headquartered in London, is a leading provider of industrial asset performance management products used in upstream projects, refineries, gas plants, petrochemical plants, power plants, and pulp and paper mills.

Willbros Group Inc.

Houston, has announced the resignations of Clay Etheridge, president of Willbros International Inc. (WII), and James R. Wiggins, vice-president of WII and country manager for Nigeria.

Jerrit Coward, formerly senior manager in Nigeria, will serve as country manager for the area. Coward has over 14 years of experience, including multiple assignments in West Africa.

John Allcorn, executive vice-president, will have executive management responsibilities for operations in America, Oman, and other international venues addressed by the company.

Willbros President and COO, Randy Harl, will assume direct management of the four major projects in Nigeria, with managers reporting directly to him.

Willbros Group Inc. is an independent contractor serving the oil, gas, and power industries. The company provides engineering and construction services worldwide.

Wood Group ESP

Houston, has appointed Harry Pollemans as region manager, Asia Pacific, based in Perth. Pollemans has 32 years of experience in industrial and electrical submersible pumping markets. He holds bachelor’s degrees in electrical engineering, marketing, and management.

Wood Group ESP, a part of John Wood Group PLC, is a leading service provider and manufacturer of electric submersible and surface pumps.