1 |
HALLIBURTON ENERGY SERVICES INC
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2 |
BAKER HUGHES INC
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3 |
SCHLUMBERGER TECHNOLOGY CORP
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4 |
PGS GEOPHYSICAL AS
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5 |
INST FRANCAIS DU PETROLE
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6 |
EXXONMOBIL UPSTREAM RES CO
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7 |
LANDMARK GRAPHICS CORP
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8 |
SCHLUMBERGER TECHNOLOGY BV
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9 |
HALLIBURTON ENERGY SERV INC
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10 |
CHEVRON USA INC
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11 |
SCHLUMBERGER CA LTD
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12 |
SAUDI ARABIAN OIL CO
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13 |
CHINA PETROLEUM & CHEM CORP
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14 |
CGG SERVICES SA
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15 |
GECO TECHNOLOGY BV
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16 |
NUCTECH CO LTD
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17 |
SCHLUMBERGER HOLDINGS
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18 |
WESTERN ATLAS INT INC
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19 |
WESTERNGECO LLC
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20 |
EXXON PRODUCTION RESEARCH CO
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21 |
SCHLUMBERGER LTD
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22 |
PETROCHINA CO LTD
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23 |
SICK AG
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24 |
CONOCOPHILLIPS CO
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25 |
CHINA NAT PETROLEUM CORP
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26 |
ION GEOPHYSICAL CORP
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27 |
RAPISCAN SYSTEMS INC
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28 |
BAKER HUGHES A GE CO LLC
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29 |
DRESSER IND
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30 |
TOTAL SA
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31 |
CGGVERITAS SERVICES SA
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32 |
GEOPHYSIQUE CIE GLE
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33 |
SERCEL RECH CONST ELECT
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34 |
WESTERNGECO SEISMIC HOLDINGS
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35 |
SCHLUMBERGER SERVICES PETROL
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36 |
BP CORP NORTH AMERICA INC
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37 |
ATLANTIC RICHFIELD CO
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38 |
SCHLUMBERGER PROSPECTION
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39 |
UNIV JILIN
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40 |
SCHLUMBERGER WELL SURV CORP
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41 |
TEXACO INC
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42 |
HALLIBURTON CO
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43 |
CONOCO INC
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44 |
CONTINENTAL OIL CO
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45 |
GECO AS
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46 |
INPUT OUTPUT INC
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47 |
ELF AQUITAINE
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48 |
FAIRFIELD IND INC
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49 |
AMERICAN SCIENCE & ENG INC
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50 |
PGS AMERICAS INC
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51 |
AMOCO CORP
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52 |
WESTERN GEOPHYSICAL CO
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53 |
INST GEOLOGY & GEOPHYSICS CAS
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54 |
TECH RESOURCES PTY LTD
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55 |
CGG SERVICES SAS
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56 |
PRAD RES & DEV LTD
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57 |
STATOIL PETROLEUM AS
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58 |
SCHLUMBERGER OVERSEAS
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59 |
KOREA INST GEOSCIENCE & MINERA
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60 |
CHINA NAT OFFSHORE OIL CORP
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61 |
STATOIL ASA
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62 |
SERVICES PÉTROLIERS SCHLUMBERGER
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63 |
UNIV CHINA PETROLEUM EAST CHINA
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64 |
RADIODETECTION LTD
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65 |
LEUZE ELECTRONIC GMBH & CO KG
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66 |
SERVICES PETROLIERS SCHLUMBERGER
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67 |
JERSEY PROD RES CO
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68 |
UNIV CHINA PETROLEUM BEIJING
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69 |
ATLAS ELEKTRONIK GMBH
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70 |
SMITHS HEIMANN GMBH
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71 |
QINETIQ LTD
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72 |
LOGINED BV
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73 |
MANNESCHI ALESSANDRO
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74 |
KEYENCE CO LTD
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75 |
INOVA LTD
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76 |
MERLIN TECHNOLOGY INC
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77 |
UNIV CHINA GEOSCIENCES BEIJING
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78 |
ELF EXPLORATION PROD
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79 |
UNIV SOUTHWEST PETROLEUM
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80 |
WEATHERFORD LAMB
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81 |
SICK OPTIK ELEKTRONIK ERWIN
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82 |
SOCONY MOBIL OIL CO INC
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83 |
WESTERNGECO SEISMIC HOLDINGS LTD
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84 |
CALIFORNIA RESEARCH CORP
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85 |
EQUINOR ENERGY AS
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86 |
SOCONY VACUUM OIL CO INC
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87 |
BARRINGER RESEARCH LTD
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88 |
REEVES WIRELINE TECH LTD
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89 |
UNIV CHENGDU TECHNOLOGY
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90 |
HYDROACOUSTIC INC
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91 |
SENSORMATIC ELECTRONICS CORP
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92 |
ELECTROMAGNETIC GEOSERVICES AS
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93 |
SCHLUMBERGER SURENCO SA
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94 |
WELL SURVEYS INC
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95 |
ANALOGIC CORP
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96 |
L 3 COMM SECURITY & DETECTION
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97 |
KJT ENTPR INC
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98 |
NORSKE STATS OLJESELSKAP
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99 |
OPTEX CO LTD
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100 |
OPTASENSE HOLDINGS LTD
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