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U.S. PATENT AND TRADEMARK OFFICE
Office of Electronic Information Products
Patent Technology Monitoring Division (PTMD)

Patenting In Technology Classes,
Breakout By Organization

Count of 2000 - 2004 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 2000 2001 2002 2003 2004 Total
HALLIBURTON ENERGY SERVICES, INC. 97 97 85 81 105 465
~Individually Owned Patent 81 126 70 78 69 424
SCHLUMBERGER TECHNOLOGY CORPORATION 30 64 65 62 79 300
BAKER HUGHES INCORPORATED 37 56 38 46 47 224
WEATHERFORD/LAMB, INC. 24 18 34 46 74 196
SHELL OIL COMPANY 16 13 18 24 66 137
ABB VETCOGRAY INC. 11 11 11 11 12 56
CAMCO INTERNATIONAL INC. 18 25 4 0 0 47
BJ SERVICES CO 5 7 8 5 17 42
FMC TECHNOLOGIES, INC. 0 0 7 15 8 30
EXXONMOBIL UPSTREAM RESEARCH COMPANY 3 5 3 9 7 27
SMITH INTERNATIONAL INC. 3 4 5 10 5 27
COOPER CAMERON CORPORATION, INC. 5 4 6 7 3 25
ATLANTIC RICHFIELD COMPANY 16 8 0 0 0 24
DRIL-QUIP, INC. 3 4 0 3 10 20
TEXACO INC. 13 6 1 0 0 20
MARATHON OIL COMPANY 4 2 4 2 3 15
PETROLEO BRASILEIRO S.A. PETROBRAS 5 2 3 5 0 15
CDX GAS, LLC 0 0 4 4 6 14
FMC CORPORATION 4 1 9 0 0 14
KVAERNER OIFIELD PRODUCTS, INC. 5 0 2 4 3 14
INSTITUT FRANCAIS DU PETROLE 2 8 0 2 0 12
CONOCOPHILLIPS COMPANY 0 0 0 7 3 10
ELF EXPLORATION PRODUCTION 3 5 0 1 0 9
INTEVEP, S.A. 0 1 5 3 0 9
PHILLIPS PETROLEUM COMPANY 2 3 3 1 0 9
SPECIALIZED PETROLEUM SERVICES LTD. 3 4 2 0 0 9
EXPRO NORTH SEA LIMITED 5 2 0 0 1 8
FRANK'S INTERNATIONAL, INC. 0 1 3 2 2 8
VARCO I/P, INC. 0 0 2 2 4 8
WOOD GROUP ESP, INC. 0 0 2 4 2 8
DEN NORSKE STATS OLJESELSKAP A.S. 0 5 0 2 0 7
HYDRIL COMPANY L.P. 2 1 2 2 0 7
KUDU INDUSTRIES, INC. 5 0 1 0 1 7
REEVES WIRELINE TECHNOLOGIES LTD. 0 1 2 2 2 7
TIW CORPORATION 0 1 1 2 3 7
WESTERN WELL TOOL, INC. 0 2 1 2 2 7
ABB OFFSHORE SYSTEMS LIMITED 0 0 2 1 3 6
DRESSER INDUSTRIES, INC. 3 3 0 0 0 6
FRANK'S CASING CREW & RENTAL TOOLS, INC. 0 1 1 4 0 6
M-I L.L.C 0 0 1 3 2 6
MOBIL OIL CORP. 2 3 0 1 0 6
SENSOR HIGHWAY LIMITED 0 0 1 4 1 6
STREAM-FLO INDUSTRIES LTD. 0 0 1 2 3 6
WEATHERFORD INTERNATIONAL, INC. 2 3 0 0 1 6
ALBERTA RESEARCH COUNCIL INC. 0 1 3 0 1 5
ALLAMON INTEREST 0 0 1 0 4 5
CONOCO, INC. 1 1 3 0 0 5
KELLOGG BROWN & ROOT, INC. 0 1 1 1 2 5
OFFSHORE ENERGY SERVICES, INC. 0 0 1 1 3 5
OIL & GAS RENTAL SERVICES, INC. 1 0 3 1 0 5
SPS-AFOS GROUP LIMITED 0 1 2 2 0 5
UNION OIL COMPANY OF CALIFORNIA 1 2 1 1 0 5


PTMD Contacts

Questions regarding these reports should be directed to:

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

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

address of PTMD pages at the USPTO Web Site: http://www.uspto.gov/web/offices/ac/ido/oeip/taf/tafp.html
ftp download of selected PTMD reports and materials from : ftp.uspto.gov/pub/taf/


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