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U.S. PATENT AND TRADEMARK OFFICE
Electronic Information Products Division
Patent Technology Monitoring Branch (PTMB)

Patenting In Technology Classes,
Breakout By Organization

Count of 2001 - 2005 Utility Patent Grants,
By Calendar Year of Grant
With Patent Counts Based on Primary Patent Classification

- Explanation of Data -

Rank Ordered Listing of Organizations Receiving 5 or More Utility Patents During the Period
Having Primary Classification In

Class 166, Wells (shafts or deep borings in the earth, e.g., for oil and gas)

( technology class is determined by the primary classification assigned to the patent- see 'Explanation of Data' )
( patent ownership is determined by the first-named assignee listed on a patent )

The following table displays first-named assignees and counts of their associated patents, as distributed by the year of patent grant
First-Named Assignee 2001 2002 2003 2004 2005 Total
HALLIBURTON ENERGY SERVICES, INC. 97 85 81 105 93 461
~Individually Owned Patent 126 70 78 69 50 393
SCHLUMBERGER TECHNOLOGY CORPORATION 64 65 62 79 55 325
BAKER HUGHES INCORPORATED 56 38 46 47 48 235
WEATHERFORD/LAMB, INC. 18 34 46 74 53 225
SHELL OIL COMPANY 13 18 24 66 44 165
ABB VETCOGRAY INC. 11 11 11 12 2 47
BJ SERVICES CO 7 8 5 17 2 39
FMC TECHNOLOGIES, INC. 0 7 15 8 5 35
SMITH INTERNATIONAL INC. 4 5 10 5 7 31
CAMCO INTERNATIONAL INC. 25 4 0 0 0 29
EXXONMOBIL UPSTREAM RESEARCH COMPANY 5 3 9 7 4 28
COOPER CAMERON CORPORATION, INC. 4 6 7 3 2 22
CDX GAS, LLC 0 4 4 6 6 20
DRIL-QUIP, INC. 4 0 3 10 2 19
VARCO I/P, INC. 0 2 2 4 6 14
CONOCOPHILLIPS COMPANY 0 0 7 3 2 12
MARATHON OIL COMPANY 2 4 2 3 0 11
PETROLEO BRASILEIRO S.A. PETROBRAS 2 3 5 0 1 11
FMC CORPORATION 1 9 0 0 0 10
INSTITUT FRANCAIS DU PETROLE 8 0 2 0 0 10
FRANK'S INTERNATIONAL, INC. 1 3 2 2 1 9
INTEVEP, S.A. 1 5 3 0 0 9
KVAERNER OIFIELD PRODUCTS, INC. 0 2 4 3 0 9
ATLANTIC RICHFIELD COMPANY 8 0 0 0 0 8
FRANK'S CASING CREW & RENTAL TOOLS, INC. 1 1 4 0 2 8
TEXACO INC. 6 1 0 0 1 8
TIW CORPORATION 1 1 2 3 1 8
VETCO GRAY INC 0 0 0 0 8 8
WOOD GROUP ESP, INC. 0 2 4 2 0 8
DEN NORSKE STATS OLJESELSKAP A.S. 5 0 2 0 0 7
M-I L.L.C 0 1 3 2 1 7
PHILLIPS PETROLEUM COMPANY 3 3 1 0 0 7
REEVES WIRELINE TECHNOLOGIES LTD. 1 2 2 2 0 7
SENSOR HIGHWAY LIMITED 0 1 4 1 1 7
STREAM-FLO INDUSTRIES LTD. 0 1 2 3 1 7
WESTERN WELL TOOL, INC. 2 1 2 2 0 7
ABB OFFSHORE SYSTEMS LIMITED 0 2 1 3 0 6
ALLAMON INTEREST 0 1 0 4 1 6
ELF EXPLORATION PRODUCTION 5 0 1 0 0 6
OFFSHORE ENERGY SERVICES, INC. 0 1 1 3 1 6
SPECIALIZED PETROLEUM SERVICES LTD. 4 2 0 0 0 6
ALBERTA RESEARCH COUNCIL INC. 1 3 0 1 0 5
BIP TECHNOLOGY, LTD. 0 0 0 4 1 5
CHEVRON U.S.A. INC. 1 1 1 1 1 5
DOWNHOLE PRODUCTS (UK) LIMITED 0 2 1 1 1 5
HYDRIL COMPANY L.P. 1 2 2 0 0 5
KELLOGG BROWN & ROOT, INC. 1 1 1 2 0 5
SPS-AFOS GROUP LIMITED 1 2 2 0 0 5


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U.S. Patent and Trademark Office
Electronic Information Products Division - PTMB
MDW 4C18; P.O Box 1450
Alexandria VA 22313-1450

tel: (571) 272-5600
fax: (571) 273-0110
email: oeip@uspto.gov

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