WILLBROS

CONSTRUCTION AND MAINTENANCE OF PIPELINE SYSTEMS, ONSHORE CONTRACT ROTARY DRILLING AND OTHER OI L AND GAS RELATED FACILITIES FOR OTHERS

TRANSPORTING CRUDE AND REFINED PETROLEUM AND NATURAL GAS BY WAY OF PIPELINE FOR OTHERS

EXPLORATION FOR AND DEVELOPMENT OF OIL AND GAS AND OTHER HYDROCARBONS, DRILLING AND OPERATING OIL AND GAS WELLS AND OTHER OIL AND GAS RELATED FACILITIES AND PROVIDING ENGINEERING SERVICES AND PROJECT MANAGEMENT FOR OTHERS