ABB RANDALL
ADAIR COMPRESSOR FACILITY
AGIP PETROLEUM COMPANY, INC. / IRELAND
AGUAYTIA ENERGY DEL PERU / PERU
AIR PRODUCTS & CHEMICAL INC.
AL FURAT PETROLEUM CO. / SYRIA
ALLIANCE ENGINEERING
AMERADA HESS CORP.
ANADARKO
ARCO CHEMICAL COMPANY
ARCO OIL & GAS CO.
BARIVEN CORPORATION / VENEZUELA
BCCK ENGINEERING
BECHTEL CORPORATION
BEELINE GAS SYSTEMS
BENTON / VINCCLER
BLACK WARRIOR METHANE COMPANY
BOWDEN CONSTRUCTION
BP EXPLORACION DE VENEZUELA / VENEZUELA
BRASPETRO OIL / BRAZIL
BRITISH GAS
BRITISH GAS / TUNISIA
BROWN & ROOT INTERNATIONAL, INC.
CANADIAN PETROLEUM INTERNATIONAL / NIGERIA
CANTERA RESOURCES, INC.
CHEVRON NIGERIA / NIGERIA
CHEVRON USA INC.
CITCO OIL & GAS
CMS FIELD SERVICES
CONOCO, INC.
COSTAL CHEMICAL, INC.
CROSSTEX
CYANARA CORPORATION
DAVY McKEE CORP.
DDVSA SERVICE, INC.
DELHI GAS
DELMAR OPERATING, INC.
DICKSON TRYER ENGINEERING
DOW CHEMICAL USA
DUKE ENERGY
DYNAGEN
ECOPETROL/ECOGAS
EJULEBE PRODUCTION FACILITY / OFFSHORE NIGERIA
EL PASO NATURAL
ELKINS WELDING
ELM RIDGE RESOURCES
ENRON CORP.
EPKE GAS COMPRESSION PROJECT / NIGERIA
EXXON CORP.
FABCO PRODUCTS
FINA OIL & CHEMICALS
FLARE INDUSTRIES
FLUOR DANIEL
FMC WYOMING CORPORATION
FREEPORT-McMORAN
GAS TECHNOLOGIES CORPORATION
GBA CORONA
GORY ROOF TILE
GPM GAS CORPORATION
HALIBURTON
HALL HOUSTON OFFSHORE
HOECHST CELANESE/LASMO OIL / PAKESTAN
HPF CONSULTANTS
HRI - VENEZUELA
HUDSON ENGINEERING, CORPORATION
HUNTSMAN CORPORATION
HY-BON
HYDROCARBON RESEARCH, INC.
ISPAT, LTD / TRINIDAD
JOHN BROWN ENGINEERING
J. RAY McDERMOTT ENGINEERING
KEEL ENGINEERING
KENNETH SALLEY ENT., INC.
KENTECH ( CASPIAN SEA LTD.) / RUSSIA
KERR-McGEE
KN - ENERGY

KINDER-MORGAN
KOCH
KVAERNER
KVAERNER - HRI, INC.
LAFITTE WELDING
LASMO OIL / COLUMBIA
LITWIN AMCA INTERNATIONAL
MARATHON OIL CO.
MAX WELDERS, INC.
MAXUS EXPLORATION COMPANY
MDS McELROY DIVERSIFIED SERVICES
MERIDIAN OIL, INC.
MILLENNIUM GAS SERVICES, INC.
MOBIL E & P US, INC.
MOBIL EXPLORATION & PRODUCTION
MOBIL PRODUCING NIGERIA, LTD.
MODEC
MODULAR PRODUCTION EQUIPMENT
MUSTANG ENGINEERING
NAVAJO REFINING
NEW POINT GAS SERVICES
NORCEN EXPLORER, INC.
NU COR CORPORATION / TRINIDAD, W.I.
NUCONSTEEL / CARRIBEAN
NYE ENGINEERING
OCCIDENTAL CHEMICAL CORPORATION
OCCIDENTAL OF PAKISTAN / PAKISTAN
OCEANEERING PRODUCTION SYSTEMS OFFSHORE / NIGERIA
ONEOK FIELD SERVICES
OPTIMIZED PROCESS DESIGN
ORTLOFF ENG.,LTD
PDVSA
PENNZOIL
PETREX, INC.
PETRO / MARINE
PETRO / MARINE / THAILAND OFFSHORE
PHILLIPS PETROLEUM
PHILLIPS PETROLEUM INTERNATIONAL COMPANY / ASIA
PRATT & WHITNEY
PREMIER INDUSTRIES, INC.
PRODUCTION MANAGEMENT IND. INC.
QUAD S CONSTRUCTION
REF-CHEM CORP.
RIVER CITY ENGINEERING
SCHLUMBERGER / COLUMBIA
SHELL DEEPWATER DEVELOPMENT, INC
SHELL OFFSHORE, INC.
SID RICHARDSON
SIVALLS, INC.
STONE & WEBSTER ENG.
SULFA TREAT COMPANY
TEXACO - SOUTH MARSH ISLAND
TEXACO OFFSHORE
TEXACO, INC.
THAI PETRO CHEMICAL IND. / THAILAND
THETFORD SYSTEMS, INC.
TRICO INDUSTRIES, INC.
U.M.C. PETROLEUM COMPANY / SOUTH AFRICA
U.O.P. / MEXICO
UNION PACIFIC RESOURCES
UNITED STATES EXPLORATION
UNITED TECHNOLOGIES
UOP GAS PROCCESING / MEXICO
URAIGAZ / RUSSIA
US FILTER
US FILTER - WITTIER
USX CORPORATION
VIRTEX PETROLEUM
WARREN PETROLEUM CO.
WENDLAND MANUFACTURING
WILLIAM F. SURGI EQUIPMENT CORP.
WILLIAMS FIELD SERVICES
WISDOM ENGINEERING
XIJIANG
XYTEL BECHTEL, INC.