Logo API
printPrint

API Member Companies

Our corporate members, from the largest major oil company to the smallest of independents, come from all sectors of the industry. They are producers, refiners, suppliers, pipeline operators and marine transportation companies, as well as service and supply companies that support all segments of the industry. Our members are committed to develop and adhere to the highest level industry standards, protect the environment, and lead in health and safety performance.

A  B C  D  E  F G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z

------------------------------------------------------------------------------------------

A

ABB/TOTALFLOW

ABS AMERICAS

ACCURATE MEASUREMENT CONTROLS, INC.

ACI SERVICES

ACUREN

ADVANCED FLUID  CONTAINMENT, LLC

ADVANCE VALVES

ADVANCED INDUSTRIAL SERVICES, INC.

AEC ENGINEERING

AECOM ENVIRONMENT GROUP

ALCOA OIL AND GAS

ALL-PRO FASTNERS, INC.

ALLERION OILFIELD SERVICES, INC. 

ALLOY BELLOWS AND PRECISION WELDING

ALLSTATE POWER-VAC 

ALSTOM GRID, INC.

ALYESKA PIPELINE SERVICE COMPANY

AMERICAN BLOCK CO

AMERAPEX CORPORATION

AMERICAN CRANE & EQUIPMENT CORPORATION

AMERICAN INNOVATIONS

AMERICAN INSPECTION SERVICES, INC.

AMERICAN MARINE SERVICES GROUP

AMERICAN SHALE OIL, LLC

AMERICAN PETROLEUM TANKERS, LLC

AMERIDRIVES INTERNATIONAL

AMSPEC SERVICES LLC

AMYRIS INC.

ANADARKO PETROLEUM CORPORATION

ANTEA GROUP

ANTON PAAR USA

AOI INTERNATIONAL, INC.

APAVE INTERNATIONAL

APPLIED TECHNICAL SERVICES, INC.

APPLUS VELOSI

APPLUSRTD

AQUILEX CORPORATION

ARCELOR MITTAL USA

ARGUS CONSULTING

ARIEL CORPORATION

ARMCO

ARRAY HOLDINGS 

ASK INDUSTRIES, INC.

ARSEAL TECHNOLOGIES LLC

ASHLAND, INC. 

ASTON TECHNICAL CONSULTING SERVICES, LLC

ATKINS, INC.

ATCO EMISSIONS MANAGEMENT, INC.

ATHENS GROUP 

A.W. CHESTERTON COMPANY

AXON ENERGY PRODUCTS, INC.

------------------------------------------------------------------------------------------

B

BAKER ENGINEERING & RISK CONSULTANTS, INC.

BAKER HUGHES, INC.

BALTIC CONTROL LTD. 

BASE LINE DATA, INC.

BASSLER ENERGY SERVICES, INC.

BASTION TECHNOLOGIES, INC.

BAYER TECHNOLOGY SERVICES AMERICAS

BECHTEL CORPORATION

BELCO MANUFACTURING CO. INC.

BELL TECHNOLOGIES, LLC

BELLE FOURCHE PIPELINE

BENCH TREE GROUP

BENOIT PREMIUM THREADING, LLC 

BERIC-DAVIS COMPANIES INTERNATIONAL LTD.


BESTOLIFE CORPORATION

BHL INTERNATIONAL, INC.


BHP BILLITON

BIG 6 DRILLING

BILFINGER NORTH AMERICA

BIRWELCO USA INC.

BLACK GOLD PUMP & SUPPLY

BLACKMER

BLADESTONE INTERNATIONAL


BLESS OILFIELD SERVICES, INC.

BLUE OCEAN TECHNOLOGIES LLC

BLUEKNIGHT ENERGY PARTNERS LLC

BOUCHARD TRANSPORTATION CO., INC.


BOUSTEAD INTERNATIONAL HEATERS LIMITED

BOWEN INDUSTRIAL CONTRACTORS, INC.

BP AMERICA INC.

BREAKWATER ENERGY SERVICES, LLC

BRODIE INTERNATIONAL

BS&B SAFETY SYSTEMS, L.L.C.

BUCKEYE PIPELINE

BUREAU VERITAS NORTH AMERICA, INC.

BURCKHARDT COMPRESSION (US) INC.

BUREAU VERITAS ECUADOR C.A.
------------------------------------------------------------------------------------------
C

CAN USA, INC.

C&C INDUSTRIES, INC.

C & J ENERGY SERVICES, INC. 

C &W TANK, INC.

CALDWELL TANKS, INC.


CAMERON INTERNATIONAL CORP.

CAMIN CARGO CONTROL

CAPE, INC.

CAPITOL ULTRASONICS COMPANY, INC.

CARE ION TECHNOLOGIST SDN. BHD.

CARPENTER TECHNOLOGY CORPORATION

CASHCO INC.

CATSI

CETEK LIMITED

CHARTER BROKERAGE

CHATTANOOGA BOILER & TANK, INC.

CHECK-6

CHEMSTAR

CHESAPEAKE ENERGY


CHEVRON CORPORATION

CIR LABORATORY, INC. 

CIRCOR ENERGY PRODUCTS, INC.

CLEAN FUEL ASSOCIATES, INC. 

CLEARSIGN COMBUSTION CORPORATION

CLEVELAND INTEGRITY SERVICES, INC. 

CJ WINTER MACHINE TECHNOLOGIES

C-MAR AMERICA, INC.

COASTAL FLOW MEASUREMENT, INC.

COASTAL GULF & INTERNATIONAL, INC.

COBALT INTERNATIONAL ENERGY, L.P.

COGNASCENTS CONSULTING GROUP, INC. 

COLLINS ENGINEER INC. 

COLONIAL PIPELINE COMPANY

COLORADO ENGINEERING EXPERIMENT STATION, INC.

COLUMBIA INDUSTRIES

COLUMBUS MCKINNON CORPORATION


CONBRACO INDUSTRIES, INC.

CONOCOPHILLIPS

CONSOLIDATED FABRICATION & CONSTRUCTORS

CONSOLIDATED PRESSURE CONTROL, LLLP

CORROSION CONTROL INC.


CPW AMERICA CO. 

CRC-EVANS PIPELINE INTERNATIONAL

CRYOSTAR

CSD ENGINEERS, LLC

CST COVERS

CUMMINGS RITTER CONSULTANTS

CYNTECH CORPORATION
------------------------------------------------------------------------------------------
D

DAKOTA PLAINS HOLDINGS, INC. 

DANIEL MEASUREMENT & CONTROL, INC.

DELTA C TECHNOLOGIES, INC.

DENSO NORTH AMERICA

DET NORSKE CLASSIFICATION (AMERICAS)

DET NORSKE VERITAS (USA) INC.

DEVON ENERGY CORP.

DHV INDUSTRIES, INC. 

DIAMOND OFFSHORE 

DIXON-EAGLE, INC.

DJA INSPECTION SERVICES, INC.

DOKAAN, LLC

DOVER ARTIFICIAL LIFT 

DOW CHEMICAL COMPANY

DOWNHOLE PRODUCTS USA 

DTC ENERGY GROUP, INC. 

DURA-BAR

DUOLINE TECHNOLOGIES, L.P.


DYCE USA, INC.

DYNAMIC FLOW COMPUTERS

DYNMCDERMOTT
------------------------------------------------------------------------------------------
E

EAGLE RESEARCH CORPORATION

ELECTRIC MACHINERY COMPANY / CONVERTEAM


ELECTROLAB 

ELEMENTIS SPECIALITIES

ELEMENT INTEGRITY GROUP, INC. 

ELLIOTT SERVICES, INC.

EMATS, INC.

ENBRIDGE ENERGY PARTNERS, L.P.

ENCANA

ENDRESS+HAUSER FLOWTEC AG

ENEFIT 

ENERGI INSURANCE SERVICES, INC.

ENERGY EXCHANGER COMPANY

ENERGY & TECHNOLOGY CORP. AND GROUP OF COMPANIES

ENERGY XXI

ENERVEST LTD. 

ENGINEERING & INSPECTION SERVICES, LLC

ENGINEERING PARTNERS INTERNATIONAL, INC.

ENOVATION CONTROLS

ENPRO INDUSTRIES PVT LTD

ENSCO PLC

ENTERPRISE PRODUCT PARTNERS LP

ENTHONE INC.

EORM, INC. 

EQUITY ENGINEERING GROUP, INC.

ERM - ENVIRONMENTAL RESOURCES MANAGEMENT

ESRI, INC. 

ENVIRONMENTAL STANDARDS INCORPORATED


EVONIK ROHMAX

EXPLORER PIPELINE COMPANY

EXPRESS ENERGY SERVICES

EXXONMOBIL
------------------------------------------------------------------------------------------
F

FASTENAL COMPANY

FBV, INC.

FEDERAL SERVICES LLC

FISHER TANK COMPANY

FLEXTM, INC.

FLARE IGNITORS PIPELINE & REFINERY, LLC

FLEXSTEEL PIPELINE TECHNOLOGIES, INC

FLOW DATA, INC.

FLOW MANAGEMENT DEVICES, LLC

FLUOR CORPORATION


FMC TECHNOLOGIES INC.

FOERSTER INSTRUMENTS INC., USA 

FORUM VALVE SOLUTIONS

FOSS MARITIME COMPANY


FOSTER WHEELER USA CORPORATION

FRAC TECH SERVICES, LLC

FRANDSON SAFETY, INC. 

FREEPORT-MCMORAN OIL & GAS

FURMANITE
------------------------------------------------------------------------------------------
G

GARLOCK SEALING TECHNOLOGIES

GAS AND AIR SYSTEMS, INC.


GBR

GEARENCH

GE ENERGY/ BENTLY NEVADA

GE OIL & GAS

GENERAL ELECTRIC INSPECTION SERVICES

GENESIS ENERGY

GEVO

GILBARCO VEEDER-ROOT

GL INDUSTRIAL SERVICES SINGAPORE PTE LTD.

GRACE INSTRUMENT LLC 

GREAT NORTHERN MIDSTREAM LLC

GREAT SOUTHERN TECHNOLOGIES

GREENBERRY INDUSTRIAL 

GRINDING & SIZING CO. LLC 

GULF INTERSTATE ENGINEERING COMPANY

GWC VALVE INTERNATIONAL, INC.
------------------------------------------------------------------------------------------
H

HAMON DELTAK, INC.

HALLIBURTON COMPANY

HARVEY E. YATES COMPANY (HEYCO)

HERCULES OFFSHORE 

HESS CORPORATION

HI-TECH TESTING SERVICE, INC.

HMT, INC.

HOIST AND CRANE SERVICE GROUP

HOLLOWAY HOUSTON, INC.

HOLLY ENERGY PARTNERS, L.P.


U.S. HONEYWELL ENRAF AMERICAS INC.

HOOVER CONTAINER SOLUTIONS

HOUSTON BOLT & GASKET CO.

HORIBA INSTRUMENTS, INC. 

HOWDEN BURTON CORBLIN COMPRESSOR 

H. ROSEN USA, INC.

H SCAN INTERNATIONAL

HUDSON PRODUCTS CORPORATION


HULL & ASSOCIATES, INC.

HUNT CONSOLIDATED INC.

HUNTING ENERGY SERVICES

HUNTINGTON INGALLS INDUSTRIES

HUNTINGTON TESTING & TECHNOLOGY, INC.

HY-GRADE VALVE, INC. 

HYDAC TECHNOLOGY CORPORATION
------------------------------------------------------------------------------------------
I

ICL CALIBRATION LABORATORIES, INC.

ICO ASIAPACIFIC SINGAPORE PTE. LTD.

IDEMITSU LUBRICANTS AMERICA

ieASSURANCE

IESCO LLC  

INDUSTRONIC, INC. 

INFINEUM

INSPECTORATE AMERICA CORP.


INTECH PROCESS AUTOMATION

INTEGRATED PROTECTION SERVICES, INC.


INTERNATIONAL DERRICK SERVICES, LLC.

INTERSPEC, LLC

INTERTEK

INQUEST INC.

ioMOSAIC CORPORATION

IOWA TANKLINES, INC. 

IRED THERMAL GROUP Ltd.

IRISNDTMatrix Corp.

ITT CORPORATION
------------------------------------------------------------------------------------------
J

J & B PAVELKA, INC. 

JAB ENERGY SOLUTIONS

JAMES MACHINE WORKS, INC.

JD NEUHAUS LP

JET-LUBE, INC.

JFE STEEL AMERICA, INC.

J.J. WHITE , INC. 

JOHN CRANE INC.

JOHN L. LOWERY & ASSOCIATES, INC.


JSW STEEL USA INC.

JUSTISS OIL COMPANY
------------------------------------------------------------------------------------------
K

KAM CONTROLS, INC.

KAMAL ENGINEERING CORPORATION

KAWA ENGINEERING LTD. 

KAYDON RING & SEAL, INC.

KBK INDUSTRIES 

KELCHNER

KEYSTONE SHIPPING

KIRBY OFFSHORE MARINE

KIMRAY INC.

KINDER MORGAN ENERGY PARTNERSHIP, L.P.


KINDER VALVES, INC.

KROHNE, INC. 

------------------------------------------------------------------------------------------
L

L & J TECHNOLOGIES

LARSEN & TOUBRO LIMITED


LAURENTIAN STEEL FABRICATORS, INC.

LEE SPECIALTIES, LTD. 

LEECO STEEL, LLC

LIGHTNING ELIMINATORS & CONSULTANTS, INC. 

LIGHTNING MASTER CORPORATION

LIQUID CONTROLS GROUP  

LLOYD'S REGISTER AMERICAS

LLOYD'S REGISTER ENERGY AMERICAS, INC.

LOADMASTER ENGINEERING

LONE STAR INDUCTION, INC. 

LOOP LLC

LOR CONSULTING, INC. 

LORD CORPORATION

LUBRIZOL CORPORATION

LUFKIN INDUSTRIES, INC.

------------------------------------------------------------------------------------------
M

M & H ENERGY SERVICES

MAERSK DRILLING

MAERSK OIL AMERICA, INC.

MAGELLAN MIDSTREAM PARTNERS

MAGNAFLUX

MAGNETIC ANALYSIS CORPORATION


MANGAN, INC.

MAGNUM PIERING, INC. 

MAP OIL TOOLS

MARATHON OIL COMPANY

MARATHON PETROLEUM CORPORATION


MARINE SPILL RESPONSE CORPORATION

MASS TECHNOLOGY CORPORATION

MATHENA, INC. 

MATRIX PDM ENGINEERING

MAVERICK TESTING LABORATORIES, INC.

MCCROMETER

MEADOWS ANALYSIS & DESIGN, LLC 

MECHATRENDS CONTRACTORS CORP.

MERICHEM COMPANY

MERIDIUM, INC.

MESA INDUSTRIES

METER ENGINEERS, INC.

MICRO MOTION, INC.

MIDCONTINENTAL CHEMICAL COMPANY

MID-STATES SUPPLY COMPANY INC.

MIDLAND MANUFACTURING CORPORATION

MIDWESTERN SERVICES, INC.

MILLER CONSULTING SERVICES

MILWAUKEE VALVE COMPANY

MISTRAS GROUP, INC.

MMI ENGINEERING 

MOGAS INDUSTRIES

MOKVELD VALVES, INC.

MOODY AND ASSOCIATES, INC.

MOODY INTERNATIONAL, INC.

MORAN TOWING CORPORATION

MOTT TANK INSPECTION, INC.

MUSE, STANCIL & COMPANY

MURPHY OIL CORPORATION
------------------------------------------------------------------------------------------
N

NATIONAL OILWELL VARCO

NATIONAL PUMP COMPANY, LLC.

NATIONAL STEEL CAR

NATIONAL STEEL ERECTION, INC.

NATIONWIDE BOILER INCORPORATED

NAUTILUS INTERNATIONAL, LLC

NAVARIK CORP.

NAVASOTA OILFIELD SERVICES, INC.

NDT SYSTEMS & SERVICES (AMERICA), INC.

NESTE OIL 

NEUMAN & ESSER USA, INC.

NEWDELL COMPANY

NEWMARKET CORPORATION

NEWPARK RESOURCES, INC.

NIAGARA BLOWER HEAT TRANSFER SOLUTIONS

NISER INTERNATIONAL

NMC GLOBAL CORP.

NOBLE CORPORATION

NORTHERN TIER ENERGY 

NORTHERN TECHNOLOGIES INTERNATIONAL CORPORATION

NORTH WEST REDWATER PARTNERSHIP


NORTHWEST TECHNICAL SOLUTIONS 

NSK CORPORATION 

NUSTAR ENERGY L.P.
------------------------------------------------------------------------------------------
O

OCCIDENTAL OIL & GAS CORPORATION

OCEAN SHIPHOLDINGS, INC.

OCEANEERING INTERNATIONAL, INC.

OSECO INC. 

OCS GROUP

OFFSHORE INSPECTION GROUP

OFI TESTING EQUIPMENT, INC. (OFITE)

OFTS, LLC OIL FIELD TECHNICAL SERVICES

OIL & GAS PROCESS SOLUTIONS 

OIL INSPECTIONS (USA), INC.

OILFIELD AUDIT SERVICES, INC. 

OK LEASING LATIN AMERICA, INC.

OMNI FLOW COMPUTERS, INC.

ON-SITE SAFETY, INC. 

ONEOK

ONWARD, LLC

ORION DRILLING COMPANY, LLC

------------------------------------------------------------------------------------------
P

PACIFIC DRILLING SERVICES, INC.

PACIFIC PETROLEUM CALIFORNIA, INC.

PALA-INTERSTATE, LLC

PARAGON INDUSTRIES, INC.

PARKER DRILLING COMPANY

PARKER HANNIFIN CORPORATION

PARKER PGI

PASO ROBLES TANK, INC.

PATTERSON TUBULAR SERVICES

PB ENERGY STORAGE SERVICES, INC.

PBM, INC.

PCA ENGINEERING, INC.


PEAK COMPLETION TECHNOLOGIES, INC.

PEERLESS DYNAMICS

PEGASUS INSPECTIONS & CONSULTINGS LLC

PENTAIR VALVES AND CONTROLS 

PENNSYLVANIA GENERAL ENERGY, LLC

PERMIAN PRODUCTION EQUIPMENT, INC.

PETROBRAS AMERICA, INC.

PETROCHEM INSPECTION SERVICES

PETROJET

PETROSPECT, INC.

PETRUSTECH OIL & GAS, LLC

PHILADELPHIA GEAR CORPORATION

PHILADELPHIA MIXING SOLUTIONS

PHILLIPS 66

PHOENIX INDUSTRIAL LTD.


PINNACLE AIS

PINNACLE OIL

PLAINS ALL AMERICAN PIPELINE, L.P.

PLS CONSTRUCTION, INC. 

PMC INDUSTRIES

POCAR SEAL

POND & COMPANY

PORTLAND PIPE LINE CORPORATION

POTAMAC ENVIRONMENTAL, INC.

PPL INTERSTATE ENERGY COMPANY

PPM CONSULTANTS, INC.

PRECISION DRILLING OILFIELD SERVICES CORPORATION

PREMIER ENERGY TECHNICAL SERVICES 

PRIMARY SOURCING CORP

PROTEC - PROFESSIONAL TECHNICAL SERVICE

PROJECT CONSULTING SERVICES, INC.

PROSERV

PROVENANCE CONSULTING

PROTECTOSEAL COMPANY

PRUITT TOOL & SUPPLY CO., INC. 
------------------------------------------------------------------------------------------
Q

QUEST CONSULTANTS INC. 

QUALITY CONTROL COMPANY

QUALITY CUSTOMS INSPECTIONS & LABORATORIES

QUALSPEC

QUANTITYWARE 

QUEST INTEGRITY USA, LLC

QUORUM BUSINESS SOLUTIONS, INC.
------------------------------------------------------------------------------------------
R

RAINBOW MECHANICAL & ELECTRICAL WORKS LLC

RCP INC. 

REBL REFRACTORIES EVALUATIONS LABORATORY LTD

RECON ENGINEERING AND CONSTRUCTION

RED DOG MOBILE SHELTERS, LLC

REDGUARD 

REINAUER TRANSPORTATION COMPANIES

REPSOL E&P USA INC.

RICCARDELLI CONSULTING SERVICES, INC. 

ROBERT J. JENKINS AND CO.

ROBINSON INTERNATIONAL (USA), INC.

ROCKFORD CORPORATION

ROCKY MOUNTAIN FABRICATION

RODDEY ENGINEERING SERVICES

ROTARY COMPONENTS INTERNATIONAL, INC.

ROWAN COMPANIES, INC.

ROXTEC, INC

R.T. VANDERBILT COMPANY, INC.

RUHRPUMPEN, INC.
------------------------------------------------------------------------------------------
S

SABRE MANUFACTURING

SAF-T COMPLIANCE INTERNATIONAL 

SAFETY-KLEEN SYSTEMS, INC.

SANDBAGS, LLC

SAUDI REFINING, INC.

SAVAGE SERVICES CORPORATION

SAYBOLT INC.

SBM-ATLANTIA

SCAN SYSTEMS CORP.

SCENIC PRECISE ELEMENT, INC.


SCHLUMBERGER LIMITED

SCHNEIDER ELECTRIC

SCHRAMM, INC.

SDS PETROLEUM CONSULTANTS, L.L.C

SEABULK INTERNATIONAL INC.


SEARIVER MARITIME, INC.

SEMGROUP CORPORATION

SENTRY EQUIPMENT CORP.

SERVICE KING MFG.

SET INDUSTRIAL SERVICES, INC.

SGS NORTH AMERICA, INC.

SHELL OIL COMPANY

SHM INDUSTRIES, CO.

SICK MAIHAK, INC.

SIEMENS ENERGY - OIL & GAS CONSULTING SOLUTIONS

SIEMENS WATER TECHNOLOGIES CORP.

SIERRA SERVICES, LLC

SINTEX MINERALS & SERVICES, INC. 

SIVALLS, INC.

SK LUBRICANTS AMERICAS

SMITH & BURGESS LLC.

SMITH TANK & STEEL, INC.

SOLON MANUFACTURING COMPANY

SOUTH COAST PRODUCTS, INC.

SOUTHERN VALVE SERVICES

SPACE SCIENCE SERVICES, INC.

SPECTRA ENERGY 

SPL, INC.

SPOOLTECH, INC.

S-TANK ENGINEERING CO. LTD

STANTEC

STANTECH

STATOIL

STRESS ENGINEERING SERVICES, INC.

STUPP CORPORATION

SULZER PUMPS, INC.

SUNBELT EXPRESS SERVICES, INC. 

SUNOCO LOGISTICS

SWAGELOK COMPANY

SWI VALVE CORPORATION
------------------------------------------------------------------------------------------
T

T.D. WILLIAMSON, INC.

T.H. HILL ASSOCIATES, INC.

TALISMAN ENERGY INC.

TANCO ENGINEERING, INC.

TANK BUILDERS, INC.

TANK INDUSTRY CONSULTANTS, INC.

TAUBER OIL COMPANY

TEADIT NORTH AMERICA

TEAM, INC.

TEEKAY SHIPPING

TEEMCO, LLC

TECHCORR USA LLC


TEJAS TUBULAR PRODUCTS, INC.

TENARIS

TESTEX INSPECTION LLC

TETRA TECH, INC.

TEXAS PIPE WORKS, INC.

T.F. WARREN GROUP 

THE NEW ERA GROUP

THERMO NITON ANALYZERS LLC

THIELSCH ENGINEERING

THORPE SPECIALTY SERVICES CORPORATION 

TIDEWATER INC.

TIDY STEEL-FAB LTD.

T.I.E.C., INC. 

TITAN CONTRACTING & LEASING COMPANY, INC.

TOTAL E&P USA, INC.

TOTAL SAFETY

TRANSCANADA PIPELINES

TRANSOCEAN

TRANSPORTATION & INDUSTRIAL SERVICES, INC.

TRINITY INDUSTRIES LEASING COMPANY

TRISTAR TERMINALS GUAM, INC.

TRUE OIL CO.


TUBULAR SYNERGY GROUP, LP

TUCKER ENERGY SERVICES, INC. 

TURNER SPECIALTY SERVICES


------------------------------------------------------------------------------------------
U

UDELHOVEN OILFIELD SYSTEMS SERVICES, INC.

ULTRATEST NDT SERVICES INC. 

UNION TANK CAR COMPANY

UNITED SPIRAL PIPE

UNIVERSAL LUBRICANTS FACTORY (ZINOL) L.L.C.

UOP, LLC

US BENTONITE PROCESSING, INC.


U.S. STEEL TUBULAR PRODUCTS, INC.


U.S. TSUBAKI, INC.
------------------------------------------------------------------------------------------
V

VALLEY INDUSTRIAL X-RAY AND INSPECTION SERVICES, INC.


VALVTECHNOLOGIES

VAL-MATIC VALVE AND MANUFACTURING CORPORATION

VAREC, INC.


VERIFORCE, LLC

VERSA INTEGRITY GROUP

VHB, INC. 

VICTAULIC

VISTA LEAK DETECTION
------------------------------------------------------------------------------------------
W

W & T OFFSHORE, INC.

WALZEL TECHNICAL SERVICES

WAVECREST OFFSHORE SOLUTIONS INC.

WEATHERFORD INTERNATIONAL LTD.

WEG ELECTRIC CORP.


WELKER, INC.

WESTERN REFINING LOGISTICS

WELLBORE SPECIALITIES LLC

WESTERN ENERGY SERVICES CORPORATION

WESTON SOLUTIONS, INC.

WICHITA CLUTCH, INC. 

WIKA INSTRUMENT LP, USA

WILD WELL CONTROL

WILLIAMS

WILLIAM E. WILLIAMS VALVE CORPORATION

W.L. WALKER COMPANY, INC.

WM. POWELL COMPANY


WOODWARD GOVERNOR COMPANY

WOOLSLAYER COMPANIES, INC.

WPX ENERGY, INC.

------------------------------------------------------------------------------------------
X
------------------------------------------------------------------------------------------
Y

YOKOGAWA CORPORATION OF AMERICA
------------------------------------------------------------------------------------------
Z

ZEECO, INC.