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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

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A

ABB/TOTALFLOW

ABS AMERICAS

ACCURATE MEASUREMENT CONTROLS, INC.

ACI SERVICES

ACUREN

ADVANCE TANK & CONSTRUCTION COMPANY

ADVANCE VALVES

ADVANCED CORROSION TECHNOLOGIES & TRAINING, LLC

AEC ENGINEERING

AECOM ENVIRONMENT GROUP 

AGAR CORPORATION, INC.

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 ENERGY PARTNERS

AMERICAN INNOVATIONS

AMERICAN INSPECTION SERVICES, INC.

AMERICAN MARINE SERVICES GROUP

AMERICAN MIDSTREAM

AMERICAN PETROLEUM TANKERS, LLC

AMERICAN RAILCAR LEASING LLC

AMERICAN SHALE OIL 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

ARCTIC OILFIELD SERVICES 

ARGUS CONSULTING

ARIEL CORPORATION

ARRAY HOLDINGS 

ARSEAL TECHNOLOGIES LLC 


ASHFORD TECHNICAL SERVICES

ASHLAND, INC. 

AST CONSTRUCTION

ASTON TECHNICAL CONSULTING SERVICES, LLC

ATHLON SOLUTIONS

ATKINS, INC.

ATCO EMISSIONS MANAGEMENT, INC.

ATHENS GROUP 

A.W. CHESTERTON COMPANY

AXON ENERGY PRODUCTS, INC.

AZZ WSI

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B

BAKER ENGINEERING & RISK CONSULTANTS, INC.

BAKER HUGHES, INC.

BALTIC CONTROL LTD. 

BAR SOURCE INTERNATIONAL, LLC

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

BELZONA, INC.

BENCH TREE GROUP

BENOIT PREMIUM THREADING, LLC 

BERIC-DAVIS COMPANIES INTERNATIONAL LTD.

BESTOLIFE CORPORATION

BHL INTERNATIONAL, INC.

BHP BILLITON

BIG 6 DRILLING

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.

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.

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C

CAN USA, INC.

C & J ENERGY SERVICES, INC. 

C & N PETROLEUM EQUIPMENT

C & W TANK, INC.

CALDWELL TANKS, INC.

CALLIDUS TECHNOLOGIES, LLC

CAMERON INTERNATIONAL CORP.

CAMIN CARGO CONTROL

CAPE, INC.

CAPITOL ULTRASONICS COMPANY, INC.

CARE ION TECHNOLOGIST SDN. BHD.

CARPENTER TECHNOLOGY CORPORATION

CASHCO INC.

CATSI

CBCL LIMITED

CERTIFIED CALIBRATIONS, INC.

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

CONSULTING AND FIELD SERVICES, LLC 

COOPER VALVES

CORROSION CONTROL INC.

CPW AMERICA CO. 

CRC-EVANS PIPELINE INTERNATIONAL

CRYOSTAR

CSD ENGINEERS, LLC

CST COVERS

CYNTECH CORPORATION

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D

DANIEL MEASUREMENT & CONTROL, INC.

DEEPWATER SUBSEA LLC

DENSO NORTH AMERICA

DESERT NDT

DET NORSKE CLASSIFICATION (AMERICAS)

DET NORSKE VERITAS (USA) INC.

DET NORSKE VERITAS PTE. LTD. (SINGAPORE)

DEVON ENERGY CORP.

DHV INDUSTRIES, INC. 

DIAMOND OFFSHORE 

DIXON-EAGLE, INC.

DJA INSPECTION SERVICES, INC.

DOKAAN, LLC

DOMINION NDT SERVICES, INC.

DOVER ARTIFICIAL LIFT 

DOW CHEMICAL COMPANY

DOWNHOLE PRODUCTS USA 

DOXSTEEL

DRIL-QUIP

DURA-BAR

DUOLINE TECHNOLOGIES, L.P.

DURON RISER GROUP, LLC

DYNAMIC FLOW COMPUTERS

DYNMCDERMOTT

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E

EAGLE RESEARCH CORPORATION

ELECSYS CORPORATION

ELECTRIC MACHINERY COMPANY / CONVERTEAM

ELECTROLAB 

ELEMENTIS SPECIALITIES

ELEMENT INTEGRITY GROUP, INC. 

ELLIOTT SERVICES, INC.

EMATS, INC.

ENBRIDGE, INC.

ENCANA

ENDRESS+HAUSER FLOWTEC AG

ENEFIT 

ENERGI INSURANCE SERVICES, INC.

ENERGY EXCHANGER COMPANY

ENERGY TRAINING SOLUTIONS

ENERGY & TECHNOLOGY CORP. AND GROUP OF COMPANIES

ENERSYS CORPORATION

ENERVEST LTD. 

ENGINEERING & INSPECTION SERVICES, LLC

ENGINEERING PARTNERS INTERNATIONAL, INC.

ENOVATION CONTROLS

ENPRO INDUSTRIES PVT LTD

ENSCO PLC

ENTERPRISE PRODUCT PARTNERS LP

ENTHONE, INC.

ENVIRONMENTAL STANDARDS INCORPORATED

EPC ENERGY SERVICES

EQUITY ENGINEERING GROUP, INC.

ERM - ENVIRONMENTAL RESOURCES MANAGEMENT

ESRI, INC. 

ESTEEM PROJECTS, LLC

EVONIK OIL ADDITIVES

EXPLORER PIPELINE COMPANY

EXXONMOBIL

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F

FASTENAL COMPANY

FBV, INC.

FEDERAL SERVICES LLC

FISHER TANK COMPANY

FLEXITALLIC GROUP, INC.

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

FREEPORT-MCMORAN OIL & GAS

FURMANITE

FZV AMERICAS LLC

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G

GARLOCK SEALING TECHNOLOGIES

GAS AND AIR SYSTEMS, INC.

GBR

GEARENCH

GE ENERGY/ BENTLY NEVADA

GE OIL & GAS

GEFCO

GENERAL ELECTRIC INSPECTION SERVICES

GENESIS ENERGY

GILBARCO VEEDER-ROOT

GLOBAL ENERGY INSPECTIONS, INC.

GLOBAL TOOLING SPECIALTIES, INC.

GREAT NORTHERN MIDSTREAM LLC

GREAT SOUTHERN TECHNOLOGIES

GULF INTERSTATE ENGINEERING COMPANY

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H

HAMON DELTAK, INC.

HALLIBURTON COMPANY

HARVEY E. YATES COMPANY (HEYCO)

HATCH MOTT MACDONALD

HAWMAN CONTAINER SERVICES

HESS CORPORATION

HILAND PARTNERS, LP

HI-TECH TESTING SERVICE, INC.

HMT, INC.

HOIST AND CRANE SERVICE GROUP

HOLLAND 1916

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 TESTING & TECHNOLOGY, INC.

HY-GRADE VALVE, INC. 

HYDAC TECHNOLOGY CORPORATION

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I

IAN-CONRAD BERGAN LLC

ICL CALIBRATION LABORATORIES, INC.

ICO ASIAPACIFIC SINGAPORE PTE. LTD.

IDEMITSU LUBRICANTS AMERICA

IESCO LLC  

INDUSTRONIC, INC. 

INFINEUM

INSPECTORATE AMERICA CORP.

INTECH PROCESS AUTOMATION

INTEGRATED PROTECTION SERVICES, INC.

INTEGRITY INSPECTION SERVICES

INTEGRITY SOLUTIONS, LTD. 

INTERNATIONAL DERRICK SERVICES, LLC.

INTERSPEC, LLC

INTERTEK

INQUEST INC.

ioMOSAIC CORPORATION

IRED THERMAL GROUP Ltd.

IRIIS, LLC

IRISNDTMatrix Corp.

IRWIN INDUSTRIES

ISTANBUL SHIP SUPPLY, INC.

ITT CORPORATION

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J

J & B PAVELKA, INC. 

JAMES MACHINE WORKS, INC.

JCL SERVICE COMPANY LLC

JD NEUHAUS LP

JET-LUBE, INC.

JFE STEEL AMERICA, INC.

J.J. WHITE , INC.

JOE KNOWS ENERGY

JOHN CRANE INC.

JOHN L. LOWERY & ASSOCIATES, INC.

JSW STEEL USA INC.

JUSTISS OIL COMPANY

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K

KAM CONTROLS, INC.

KAWA ENGINEERING LTD. 

KBK INDUSTRIES 

KEYSTONE SHIPPING

KIMRAY INC.

KINDER MORGAN ENERGY PARTNERSHIP, L.P.

KIRBY OFFSHORE MARINE

KROHNE, INC. 

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L

L & J TECHNOLOGIES

LARSEN & TOUBRO LIMITED

LEE SPECIALTIES, LTD. 

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

LOTTCO, INC.

LOR CONSULTING, INC. 

LORD CORPORATION

LUBRIZOL CORPORATION

LUXOFT

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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

MARKWEST ENERGY PARTNERS, LP

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.

MID CENTRAL ENERGY SERVICES

MIDCONTINENTAL CHEMICAL COMPANY

MIDLAND MANUFACTURING CORPORATION

MIDWESTERN SERVICES, INC.

MILLER CONSULTING SERVICES

MILWAUKEE VALVE COMPANY

MISTRAS GROUP, INC.

MITSUBISHI CORPORATION (AMERICAS)

MOGAS INDUSTRIES

MOKVELD VALVES, INC.

MOODY INTERNATIONAL, INC.

MOTT TANK INSPECTION, INC.

MSP DRILEX

MULTIMARINE SERVICES LTD.

MURPHY OIL CORPORATION

MUSE, STANCIL & COMPANY

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N

NATIONAL OILWELL VARCO

NATIONAL PUMP COMPANY, LLC.

NATIONAL STEEL CAR

NATIONAL STEEL ERECTION, INC.

NATIONWIDE BOILER INCORPORATED

NAVARIK CORP.

NAVASOTA OILFIELD SERVICES, INC.

NDT SYSTEMS & SERVICES (AMERICA), INC.

NESTE OIL 

NEUMAN & ESSER USA, INC.

NEWMARKET CORPORATION

NEWPARK RESOURCES, INC.

NIAGARA BLOWER HEAT TRANSFER SOLUTIONS

NMC GLOBAL CORP.

NMK RESOURCES INC.

NOBLE CORPORATION

NORTH WEST REDWATER PARTNERSHIP

NORTHWEST TECHNICAL SOLUTIONS 

NUSTAR ENERGY L.P.

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O

OCCIDENTAL OIL & GAS CORPORATION

OCEAN SHIPHOLDINGS, INC.

OCEANEERING INTERNATIONAL, INC.

OSECO INC. 

OCS GROUP

OFI TESTING EQUIPMENT, INC. (OFITE)

OIL & GAS PROCESS SOLUTIONS 

OIL INSPECTIONS (USA), INC.

OK LEASING LATIN AMERICA, INC.

OMNI FLOW COMPUTERS, INC.

ONEOK

OPAMP INFORMATION MANAGEMENT

ORION DRILLING COMPANY, LLC

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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.

PEAKER ENERGY GROUP, LLC

PEERLESS DYNAMICS

PEGASUS INSPECTIONS & CONSULTINGS LLC

PENTAIR VALVES AND CONTROLS 

PENNSYLVANIA GENERAL ENERGY, LLC

PERMIAN PRODUCTION EQUIPMENT, INC.

PETROBRAS AMERICA, INC.

PETROCARE MARINE CONSULTANTS, INC.

PETROCHEM INSPECTION SERVICES

PETROSPECT, INC.

PHILADELPHIA GEAR CORPORATION

PHILADELPHIA MIXING SOLUTIONS

PHILLIPS 66

PHOENIX INDUSTRIAL LTD.

PILGRIM PIPELINE HOLDINGS, LLC

PINNACLE AIS

PINNACLE OIL

PLAINS ALL AMERICAN PIPELINE, L.P.

PLS CONSTRUCTION, INC. 

PMC INDUSTRIES

POCAR SEAL

POND & COMPANY

PORTLAND PIPE LINE CORPORATION

POTOMAC ENVIRONMENTAL, INC.

PPL INTERSTATE ENERGY COMPANY

PRECISE ENERGY PRODUCTS

PRECISION DRILLING OILFIELD SERVICES CORPORATION

PRIMARY SOURCING CORP

PRIME ENGINEERING INCORPORATED

PRINCE ENERGY

PROFIRE ENERGY INC.

PROJECT CONSULTING SERVICES, INC.

PROSERV

PROVENANCE CONSULTING

PROTECTOSEAL COMPANY

PRUITT TOOL & SUPPLY CO., INC. 

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Q

QUEST CONSULTANTS INC. 

QUALITY CONTROL COMPANY

QUALITY CUSTOMS INSPECTIONS & LABORATORIES

QUALSPEC

QUANTITYWARE 

QUEST INTEGRITY USA, LLC

QUORUM BUSINESS SOLUTIONS, INC.

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R

RCP INC. 

REBELLION PHOTONICS, 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

ROXUL TECHNICAL INSULATION

R.T. VANDERBILT COMPANY, INC.

RUHRPUMPEN, INC.

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S

S&S PLATING LLC

SABRE MANUFACTURING

SAF-T COMPLIANCE INTERNATIONAL 

SAFETY-KLEEN SYSTEMS, INC.

SAUDI REFINING, INC.

SAVAGE SERVICES CORPORATION

SAVANT MEASUREMENT CORPORATION

SAYBOLT INC.

SBM-ATLANTIA

SCAN SYSTEMS CORP.

SCELERIN HEATERS LLC

SCENIC PRECISE ELEMENT, INC.

SCHLUMBERGER LIMITED

SCHNEIDER ELECTRIC

SCHRAMM, INC.

SDS PETROLEUM CONSULTANTS, L.L.C

SEABULK INTERNATIONAL INC.

SEADRILL AMERICAS, INC.

SEARIVER MARITIME, INC.

SEMGROUP CORPORATION

SENTRY EQUIPMENT CORP.

SERVICE KING MFG.

SET INDUSTRIAL SERVICES, INC.

SGS NORTH AMERICA, INC.

SGV INTERNATIONAL, LLC

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

SMART PIPE COMPANY, INC.

SMITH & BURGESS LLC.

SMITH TANK & STEEL, INC.

SOLON MANUFACTURING COMPANY

SOUTH COAST PRODUCTS, INC.

SOUTHERN PROCUREMENT SERVICES, INC.

SOUTHERN VALVE SERVICES

SPACE SCIENCE SERVICES, INC.

SPECTRA ENERGY 

SPL, INC.

S-TANK ENGINEERING CO. LTD

STANTEC

STANTECH

STATOIL

STRESS ENGINEERING SERVICES, INC.

STUPP CORPORATION

SUBSEA SOLUTIONS

SULZER PUMPS, INC.

SUNOCO LOGISTICS

SWAGELOK COMPANY

SWI VALVE CORPORATION

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T

T.D. WILLIAMSON, INC.

T.H. HILL ASSOCIATES, INC.

TALISMAN ENERGY INC.

TALLGRASS PONY EXPRESS PIPELINE, LLC

TAMPA TANK, INC.

TANCO ENGINEERING, INC.

TANK BUILDERS, INC.

TANK INDUSTRY CONSULTANTS, INC.

TAS ENVIRONMENTAL SERVICES, LP

TAUBER OIL COMPANY

TEADIT NORTH AMERICA

TEAM, INC.

TECHCORR USA LLC

TECHNICAL OIL TOOLS, LLC

TECNOLOGIA E INGENIERIA DIRECCIONAL

TEEKAY CORPORATION

TEJAS TUBULAR PRODUCTS, INC.

TENARIS

TETRA TECH, INC.

TEXAS PIPE WORKS, INC.

T.F. WARREN GROUP 

THE NEW ERA GROUP

THE NEWDELL COMPANY

THERMO NITON ANALYZERS LLC

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 HOLDINGS

TRINITY INDUSTRIES LEASING COMPANY

TRISTAR TERMINALS GUAM, INC.

TUBULAR SYNERGY GROUP, LP

TUCKER ENERGY SERVICES, INC. 

TURNER SPECIALTY SERVICES

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U

UDELHOVEN OILFIELD SYSTEMS SERVICES, INC.

ULTRATEST NDT SERVICES INC. 

UNDERWATER INTEGRITY SOLUTIONS

UNION TANK CAR COMPANY

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

UOP, LLC

UPSTREAM RISK CONSULTANTS, LLC

US BENTONITE PROCESSING, INC.

USG CORPORATION

U.S. STEEL TUBULAR PRODUCTS, INC.

U.S. TSUBAKI, INC.

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V

VALI COOPER INTERNATIONAL, LLC

VALLEY INDUSTRIAL X-RAY AND INSPECTION SERVICES, INC.

VALLOUREC USA CORPORATION

VALVEWORKS USA

VALVTECHNOLOGIES

VAL-MATIC VALVE AND MANUFACTURING CORPORATION

VAREC, INC.

VERIFORCE, LLC

VERISTIC MANUFACTURING

VERSA INTEGRITY GROUP

VICTAULIC

VISTA LEAK DETECTION

VOLUMETRICS, INC.

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W

W & T OFFSHORE, INC.

WALZEL TECHNICAL SERVICES

WATCO COMPANIES LLC

WAVECREST OFFSHORE SOLUTIONS INC.

WEATHERFORD INTERNATIONAL LTD.

WEG ELECTRIC CORP.

WELDED TUBE OF CANADA

WELKER, INC.

WESTERN REFINING LOGISTICS

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

WOLLAM PETROLEUM ADVISORY GROUP, LLC

WOODWARD GOVERNOR COMPANY

WOOLSLAYER COMPANIES, INC.

WORTHINGTON CYLINDERS - A WORTHINGTON INDUSTRIES COMPANY

WPX ENERGY, INC.

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X


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Y
YOKOGAWA CORPORATION OF AMERICA

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Z

ZEECO, INC.