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

Patenting In Technology Classes,
Breakout By Organization

Count of 2004 - 2008 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 2004 2005 2006 2007 2008 Total
HALLIBURTON ENERGY SERVICES, INC. 105 93 166 172 122 658
SCHLUMBERGER TECHNOLOGY CORPORATION 79 55 80 89 112 415
~INDIVIDUALLY OWNED PATENT 69 50 77 75 82 353
WEATHERFORD/LAMB, INC. 74 53 91 63 52 333
BAKER HUGHES INCORPORATED 47 48 52 51 77 275
SHELL OIL COMPANY 66 44 86 34 27 257
BJ SERVICES CO 17 2 15 25 18 77
SMITH INTERNATIONAL INC. 5 7 6 10 11 39
CDX GAS, LLC 6 6 11 9 4 36
VETCO GRAY INC 0 8 10 8 9 35
FMC TECHNOLOGIES, INC. 8 5 10 8 3 34
VARCO I/P, INC. 4 6 7 9 4 30
DRIL-QUIP, INC. 10 2 6 2 4 24
ENVENTURE GLOBAL TECHNOLOGY 1 0 3 8 12 24
EXXONMOBIL UPSTREAM RESEARCH COMPANY 7 4 4 1 7 23
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 0 1 4 3 7 15
STINGER WELLHEAD PROTECTION, INC. 0 0 0 9 6 15
ABB VETCOGRAY INC. 12 2 0 0 0 14
CAMERON INTERNATIONAL CORPORATION 0 0 5 3 6 14
TESCO CORP 2 0 5 4 3 14
WOOD GROUP ESP, INC. 2 0 4 2 5 13
CONOCOPHILLIPS COMPANY 3 2 4 1 2 12
E2 TECH LIMITED 2 1 2 6 1 12
TIW CORPORATION 3 1 3 2 3 12
INTELLISERV, INC. 1 0 5 5 0 11
HYDRIL COMPANY L.P. 0 0 4 4 2 10
SAUDI ARABIAN OIL COMPANY 2 0 0 2 6 10
MARATHON OIL COMPANY 3 0 2 2 2 9
COOPER CAMERON CORPORATION, INC. 3 2 3 0 0 8
FRANK'S CASING CREW & RENTAL TOOLS, INC. 0 2 1 3 2 8
M-I L.L.C 2 1 1 2 2 8
MSI MACHINEERING SOLUTIONS INC. 1 3 2 2 0 8
NATIONAL-OILWELL, L.P. 1 1 3 2 1 8
INSTITUT FRANCAIS DU PETROLE 0 0 5 1 1 7
WESTERN WELL TOOL, INC. 2 0 2 3 0 7
ALLAMON INTEREST 4 1 1 0 0 6
CHEVRON U.S.A. INC. 1 1 1 2 1 6
CONTROL FLOW INC. 1 1 2 1 1 6
FRANK'S INTERNATIONAL, INC. 2 1 1 0 2 6
PACKERS PLUS ENERGY SERVICES INC. 0 1 3 0 2 6
PETROLEO BRASILEIRO S.A. PETROBRAS 0 1 1 1 3 6
STATOIL ASA 1 1 1 2 1 6
STREAM-FLO INDUSTRIES LTD. 3 1 1 0 1 6
BIP TECHNOLOGY, LTD. 4 1 0 0 0 5
COUPLER DEVELOPMENTS LIMITED 2 0 0 1 2 5
DEVIN INTERNATIONAL, INC. 0 1 1 2 1 5
MAKO RENTALS, INC. 0 0 1 4 0 5
OCEANEERING INTERNATIONAL, INC. 0 0 1 4 0 5
OWEN OIL TOOLS LP. 1 2 0 0 2 5
PETROQUIP ENERGY SERVICES, LLP 0 0 0 0 5 5
PRODUCTION CONTROL SERVICES, INC. 0 0 0 1 4 5
SENSOR HIGHWAY LIMITED 1 1 3 0 0 5


PTMT Contacts

Questions regarding these reports should be directed to:

U.S. Patent and Trademark Office
Electronic Information Products Division - PTMT
P.O Box 1450
Alexandria VA 22313-1450

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

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


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