| 1 |
HALLIBURTON ENERGY SERVICES INC
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| 2 |
BAKER HUGHES INC
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| 3 |
HALLIBURTON ENERGY SERV INC
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| 4 |
SCHLUMBERGER TECHNOLOGY CORP
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| 5 |
SHELL INT RESEARCH
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| 6 |
WEATHERFORD LAMB
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| 7 |
SAUDI ARABIAN OIL CO
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| 8 |
SCHLUMBERGER TECHNOLOGY BV
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| 9 |
SCHLUMBERGER CA LTD
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| 10 |
SMITH INTERNATIONAL
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| 11 |
PETROCHINA CO LTD
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| 12 |
HALLIBURTON CO
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| 13 |
BAKER HUGHES A GE CO LLC
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| 14 |
INST FRANCAIS DU PETROLE
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| 15 |
SHELL OIL CO
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| 16 |
LANDMARK GRAPHICS CORP
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| 17 |
DRESSER IND
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| 18 |
EXXONMOBIL UPSTREAM RES CO
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| 19 |
WEATHERFORD TECH HOLDINGS LLC
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| 20 |
SCHLUMBERGER HOLDINGS
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| 21 |
CHINA PETROLEUM & CHEM CORP
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| 22 |
CAMERON INT CORP
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| 23 |
VETCO GRAY INC
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| 24 |
UNIV SOUTHWEST PETROLEUM
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| 25 |
MOBIL OIL CORP
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| 26 |
NAT OILWELL VARCO LP
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| 27 |
OTIS ENG CO
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| 28 |
MI LLC
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| 29 |
CHEVRON USA INC
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| 30 |
WELLTEC AS
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| 31 |
HUGHES TOOL CO
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| 32 |
EXXON PRODUCTION RESEARCH CO
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| 33 |
INGERSOLL RAND CO
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| 34 |
CONOCOPHILLIPS CO
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| 35 |
SANDVIK AB
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| 36 |
BAKER OIL TOOLS INC
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| 37 |
SANDVIK INTELLECTUAL PROPERTY
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| 38 |
CHINA NAT PETROLEUM CORP
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| 39 |
ATLAS COPCO AB
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| 40 |
HYDRIL CO
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| 41 |
FMC CORP
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| 42 |
CHINA NAT OFFSHORE OIL CORP
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| 43 |
SCHLUMBERGER SERVICES PETROL
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| 44 |
CAMERON IRON WORKS INC
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| 45 |
ELF AQUITAINE
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| 46 |
ATLAS COPCO ROCK DRILLS AB
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| 47 |
TEXACO INC
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| 48 |
ATLANTIC RICHFIELD CO
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| 49 |
VARCO INT
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| 50 |
TEXACO DEVELOPMENT CORP
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| 51 |
STATOIL PETROLEUM AS
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| 52 |
HILTI AG
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| 53 |
LONGYEAR TM INC
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| 54 |
WEATHERFORD TECHNOLOGY HOLDINGS LLC
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| 55 |
TRACTO TECHNIK
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| 56 |
PRAD RES & DEV LTD
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| 57 |
CAMCO INT
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| 58 |
UNIV CHINA PETROLEUM BEIJING
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| 59 |
TAMPELLA OY AB
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| 60 |
DRIL QUIP INC
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| 61 |
TECHNIP FRANCE
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| 62 |
SANDVIK MINING & CONSTR OY
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| 63 |
DAEWOO SHIPBUILDING & MARINE
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| 64 |
MARATHON OIL CO
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| 65 |
CHEVRON RES
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| 66 |
UNIV CHINA MINING
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| 67 |
UNIV CHINA PETROLEUM EAST CHINA
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| 68 |
EQUINOR ENERGY AS
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| 69 |
SANDVIK MINING & CONSTRUCTION OY
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| 70 |
SCHLUMBERGER LTD
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| 71 |
ITREC BV
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| 72 |
ENVENTURE GLOBAL TECHNOLOGY
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| 73 |
TESCO CORP
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| 74 |
KENNAMETAL INC
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| 75 |
COOPER CAMERON CORP
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| 76 |
EXPRO NORTH SEA LTD
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| 77 |
TOTAL SA
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| 78 |
SHELL CANADA LTD
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| 79 |
CONOCO INC
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| 80 |
BJ SERVICES CO
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| 81 |
PETROLES CIE FRANCAISE
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| 82 |
FMC KONGSBERG SUBSEA AS
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| 83 |
NL INDUSTRIES INC
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| 84 |
BAKER HUGHES HOLDINGS LLC
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| 85 |
BP CORP NORTH AMERICA INC
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| 86 |
VALLOUREC MANNESMANN OIL & GAS
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| 87 |
SINOPEC OILFIELD SERVICE CORP
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| 88 |
CAMCO INC
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| 89 |
UNION OIL CO
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| 90 |
GE OIL & GAS UK LTD
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| 91 |
PETROLEO BRASILEIRO SA
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| 92 |
JERSEY PROD RES CO
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| 93 |
ENI SPA
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| 94 |
FMC TECHNOLOGIES
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| 95 |
HYDRIL USA MFG LLC
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| 96 |
VETCO GRAY INC ABB
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| 97 |
VETCO GRAY SCANDINAVIA AS
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| 98 |
SCHLUMBERGER PROSPECTION
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| 99 |
SULLIVAN MACHINERY CO
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| 100 |
US SYNTHETIC CORP
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