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

Patenting In Technology Classes,
Breakout By Organization

Count of 2006 - 2010 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 2006 2007 2008 2009 2010 Total
HALLIBURTON ENERGY SERVICES, INC. 166 172 122 81 123 664
SCHLUMBERGER TECHNOLOGY CORPORATION 80 89 112 91 176 548
BAKER HUGHES INCORPORATED 52 51 77 114 152 446
~INDIVIDUALLY OWNED PATENT 77 75 82 55 102 391
WEATHERFORD/LAMB, INC. 91 63 52 30 51 287
SHELL OIL COMPANY 86 34 27 36 30 213
BJ SERVICES CO 15 25 18 20 23 101
VETCO GRAY INC 10 8 9 7 18 52
ENVENTURE GLOBAL TECHNOLOGY L.L.C. 3 8 12 8 9 40
SMITH INTERNATIONAL INC. 6 10 11 3 9 39
STINGER WELLHEAD PROTECTION, INC. 0 9 6 10 12 37
TESCO CORP 5 4 3 3 18 33
EXXONMOBIL UPSTREAM RESEARCH COMPANY 4 1 7 8 12 32
FMC TECHNOLOGIES, INC. 10 8 3 4 2 27
CDX GAS, LLC 11 9 4 1 0 25
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 4 3 7 6 5 25
VARCO I/P, INC. 7 9 4 2 3 25
CAMERON INTERNATIONAL CORPORATION 5 3 6 2 2 18
CHEVRON U.S.A. INC. 1 2 1 3 9 16
DRIL-QUIP, INC. 6 2 4 2 1 15
MAKO RENTALS, INC. 1 4 0 4 6 15
SAUDI ARABIAN OIL COMPANY 0 2 6 1 6 15
CONOCOPHILLIPS COMPANY 4 1 2 1 6 14
WOOD GROUP ESP, INC. 4 2 5 1 0 12
E2 TECH LIMITED 2 6 1 1 1 11
PRODUCTION CONTROL SERVICES, INC. 0 1 4 4 2 11
FRANK'S CASING CREW & RENTAL TOOLS, INC. 1 3 2 2 2 10
HYDRIL COMPANY L.P. 4 4 2 0 0 10
INTELLISERV, INC. 5 5 0 0 0 10
M-I L.L.C 1 2 2 3 2 10
TIW CORPORATION 3 2 3 1 1 10
WELLDYNAMICS INC. 1 2 1 2 4 10
BJ SERVICES COMPANY LLC 0 0 0 0 9 9
INSTITUT FRANCAIS DU PETROLE 5 1 1 1 1 9
PACKERS PLUS ENERGY SERVICES INC. 3 0 2 1 3 9
PETROQUIP ENERGY SERVICES, LLP 0 0 5 3 0 8
RHODIA INC. 0 0 2 0 6 8
XTREME COIL DRILLING CORP. 0 2 2 2 2 8
CLEARWATER INTERNATIONAL LLC. 2 0 2 2 1 7
GE IONICS, INC. 2 0 2 0 3 7
KELLOGG BROWN & ROOT LLC 0 1 1 3 2 7
MARATHON OIL COMPANY 2 2 2 0 1 7
NATIONAL-OILWELL, L.P. 3 2 1 1 0 7
STATOIL ASA 1 2 1 1 2 7
STREAM-FLO INDUSTRIES LTD. 1 0 1 3 2 7
WESTERN WELL TOOL, INC. 2 3 0 2 0 7
BP CORPORATION NORTH AMERICA INC. 1 0 2 1 2 6
GEOSIERRA, LLC 1 0 1 3 1 6
HAMDEEN INCORPORATED LIMITED 2 0 2 1 1 6
HUDSON SERVICES, INC. 2 0 2 1 1 6
NATIONAL-OILWELL VARCO, L.P. 0 0 0 1 5 6
NORSK HYDRO ASA 0 0 2 2 2 6
OCEANEERING INTERNATIONAL, INC. 1 4 0 0 1 6
PETROLEO BRASILEIRO S.A. PETROBRAS 1 1 3 1 0 6
PRECISION ENERGY SERVICES, INC. 0 0 1 2 3 6
ROBBINS & MYERS ENERGY SYSTEMS, L.P. 0 1 1 1 3 6
BP EXPLORATION OPERATING COMPANY LIMITED 0 1 1 1 2 5
DEVIN INTERNATIONAL, INC. 1 2 1 0 1 5
DUHN OIL TOOL, INC. 0 0 2 2 1 5
E. I. DU PONT DE NEMOURS AND COMPANY 0 0 1 0 4 5
FRANK'S INTERNATIONAL, INC. 1 0 2 1 1 5
HYDRIL USA MANUFACTURING LLC 0 0 1 1 3 5
OWEN OIL TOOLS LP. 0 0 2 3 0 5
PINE TREE GAS, LLC 0 0 0 0 5 5
PIONEER ENERGY, INC. 0 0 0 2 3 5
RESLINK AS 0 2 2 0 1 5
TOTAL SEPARATION SOLUTIONS, LLC 0 2 1 2 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
selected PTMT files available for download at : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/data/


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