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U.S. PATENT AND TRADEMARK OFFICE
Patent Technology Monitoring Team (PTMT)

Patenting In Technology Classes,
Breakout By Organization

Count of 2005 - 2009 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 2005 2006 2007 2008 2009 Total
HALLIBURTON ENERGY SERVICES, INC. 93 166 172 122 81 634
SCHLUMBERGER TECHNOLOGY CORPORATION 55 80 89 112 91 427
BAKER HUGHES INCORPORATED 48 52 51 77 114 342
~INDIVIDUALLY OWNED PATENT 50 77 75 82 55 339
WEATHERFORD/LAMB, INC. 53 91 63 52 30 289
SHELL OIL COMPANY 44 86 34 27 36 227
BJ SERVICES CO 2 15 25 18 20 80
VETCO GRAY INC 8 10 8 9 7 42
SMITH INTERNATIONAL INC. 7 6 10 11 3 37
CDX GAS, LLC 6 11 9 4 1 31
ENVENTURE GLOBAL TECHNOLOGY 0 3 8 12 8 31
FMC TECHNOLOGIES, INC. 5 10 8 3 4 30
VARCO I/P, INC. 6 7 9 4 2 28
STINGER WELLHEAD PROTECTION, INC. 0 0 9 6 10 25
EXXONMOBIL UPSTREAM RESEARCH COMPANY 4 4 1 7 8 24
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 1 4 3 7 6 21
CAMERON INTERNATIONAL CORPORATION 0 5 3 6 2 16
DRIL-QUIP, INC. 2 6 2 4 2 16
TESCO CORP 0 5 4 3 3 15
WOOD GROUP ESP, INC. 0 4 2 5 1 12
E2 TECH LIMITED 1 2 6 1 1 11
CONOCOPHILLIPS COMPANY 2 4 1 2 1 10
FRANK'S CASING CREW & RENTAL TOOLS, INC. 2 1 3 2 2 10
HYDRIL COMPANY L.P. 0 4 4 2 0 10
INTELLISERV, INC. 0 5 5 0 0 10
TIW CORPORATION 1 3 2 3 1 10
M-I L.L.C 1 1 2 2 3 9
MAKO RENTALS, INC. 0 1 4 0 4 9
PRODUCTION CONTROL SERVICES, INC. 0 0 1 4 4 9
SAUDI ARABIAN OIL COMPANY 0 0 2 6 1 9
CHEVRON U.S.A. INC. 1 1 2 1 3 8
INSTITUT FRANCAIS DU PETROLE 0 5 1 1 1 8
NATIONAL-OILWELL, L.P. 1 3 2 1 1 8
PETROQUIP ENERGY SERVICES, LLP 0 0 0 5 3 8
MSI MACHINEERING SOLUTIONS INC. 3 2 2 0 0 7
OWEN OIL TOOLS LP. 2 0 0 2 3 7
PACKERS PLUS ENERGY SERVICES INC. 1 3 0 2 1 7
PETROLEO BRASILEIRO S.A. PETROBRAS 1 1 1 3 1 7
WESTERN WELL TOOL, INC. 0 2 3 0 2 7
CLEARWATER INTERNATIONAL LLC. 0 2 0 2 2 6
MARATHON OIL COMPANY 0 2 2 2 0 6
STATOIL ASA 1 1 2 1 1 6
STREAM-FLO INDUSTRIES LTD. 1 1 0 1 3 6
WELLDYNAMICS INC. 0 1 2 1 2 6
XTREME COIL DRILLING CORP. 0 0 2 2 2 6
CONTROL FLOW INC. 1 2 1 1 0 5
COOPER CAMERON CORPORATION, INC. 2 3 0 0 0 5
DEVIN INTERNATIONAL, INC. 1 1 2 1 0 5
DUHN OIL TOOL, INC. 1 0 0 2 2 5
FRANK'S INTERNATIONAL, INC. 1 1 0 2 1 5
GEOSIERRA, LLC 0 1 0 1 3 5
HAMDEEN INCORPORATED LIMITED 0 2 0 2 1 5
HUDSON SERVICES, INC. 0 2 0 2 1 5
KELLOGG BROWN & ROOT LLC 0 0 1 1 3 5
OCEANEERING INTERNATIONAL, INC. 0 1 4 0 0 5
TECHNIP FRANCE 1 2 1 0 1 5
TOTAL SEPARATION SOLUTIONS, LLC 0 0 2 1 2 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
selected PTMT files available for download at : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/data/


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