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

Patenting In Technology Classes,
Breakout By Organization

Count of 2007 - 2011 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 2007 2008 2009 2010 2011 Total
SCHLUMBERGER TECHNOLOGY CORPORATION 89 112 91 176 148 616
HALLIBURTON ENERGY SERVICES, INC. 172 122 81 123 104 602
BAKER HUGHES INCORPORATED 51 77 114 152 122 516
~INDIVIDUALLY OWNED PATENT 75 82 55 102 69 383
WEATHERFORD/LAMB, INC. 63 52 30 51 45 241
SHELL OIL COMPANY 34 27 36 30 21 148
BJ SERVICES CO 25 18 20 23 6 92
VETCO GRAY INC 8 9 7 18 18 60
STINGER WELLHEAD PROTECTION, INC. 9 6 10 12 8 45
ENVENTURE GLOBAL TECHNOLOGY L.L.C. 8 12 8 9 4 41
SMITH INTERNATIONAL INC. 10 11 3 9 8 41
EXXONMOBIL UPSTREAM RESEARCH COMPANY 1 7 8 12 9 37
TESCO CORP 4 3 3 18 7 35
CHEVRON U.S.A. INC. 2 1 3 9 8 23
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 3 7 6 5 2 23
FMC TECHNOLOGIES, INC. 8 3 4 2 3 20
VARCO I/P, INC. 9 4 2 3 0 18
CAMERON INTERNATIONAL CORPORATION 3 6 2 2 4 17
FRANK'S CASING CREW & RENTAL TOOLS, INC. 3 2 2 2 8 17
CONOCOPHILLIPS COMPANY 1 2 1 6 6 16
MAKO RENTALS, INC. 4 0 4 6 2 16
SAUDI ARABIAN OIL COMPANY 2 6 1 6 0 15
CDX GAS, LLC 9 4 1 0 0 14
PRODUCTION CONTROL SERVICES, INC. 1 4 4 2 3 14
WELLDYNAMICS INC. 2 1 2 4 2 11
BJ SERVICES COMPANY LLC 0 0 0 9 1 10
NATIONAL-OILWELL VARCO, L.P. 0 0 1 5 4 10
PETROQUIP ENERGY SERVICES, LLP 0 5 3 0 2 10
STREAM-FLO INDUSTRIES LTD. 0 1 3 2 4 10
CLEARWATER INTERNATIONAL LLC. 0 2 2 1 4 9
DRIL-QUIP, INC. 2 4 2 1 0 9
E2 TECH LIMITED 6 1 1 1 0 9
FRANK'S INTERNATIONAL, INC. 0 2 1 1 5 9
M-I L.L.C 2 2 3 2 0 9
PACKERS PLUS ENERGY SERVICES INC. 0 2 1 3 3 9
KELLOGG BROWN & ROOT LLC 1 1 3 2 1 8
PINE TREE GAS, LLC 0 0 0 5 3 8
RHODIA INC. 0 2 0 6 0 8
STATOIL ASA 2 1 1 2 2 8
TIW CORPORATION 2 3 1 1 1 8
WOOD GROUP ESP, INC. 2 5 1 0 0 8
XTREME COIL DRILLING CORP. 2 2 2 2 0 8
BP CORPORATION NORTH AMERICA INC. 0 2 1 2 2 7
BP EXPLORATION OPERATING COMPANY LIMITED 1 1 1 2 2 7
E. I. DU PONT DE NEMOURS AND COMPANY 0 1 0 4 2 7
GEOSIERRA, LLC 0 1 3 1 2 7
HPD, LLC 0 0 3 1 3 7
HYDRIL USA MANUFACTURING LLC 0 1 1 3 2 7
OWEN OIL TOOLS LP. 0 2 3 0 2 7
PRECISION ENERGY SERVICES, INC. 0 1 2 3 1 7
ROBBINS & MYERS ENERGY SYSTEMS, L.P. 1 1 1 3 1 7
HUDSON SERVICES, INC. 0 2 1 1 2 6
HYDRIL COMPANY L.P. 4 2 0 0 0 6
MARATHON OIL COMPANY 2 2 0 1 1 6
NORSK HYDRO ASA 0 2 2 2 0 6
PETROLEO BRASILEIRO S.A. PETROBRAS 1 3 1 0 1 6
ARCHON TECHNOLOGIES LTD. 0 0 2 1 2 5
BESST, INC 0 0 3 1 1 5
DEVIN INTERNATIONAL, INC. 2 1 0 1 1 5
DUHN OIL TOOL, INC. 0 2 2 1 0 5
GE IONICS, INC. 0 2 0 3 0 5
HAMDEEN INCORPORATED LIMITED 0 2 1 1 1 5
INSTITUT FRANCAIS DU PETROLE 1 1 1 1 1 5
INTELLISERV, INC. 5 0 0 0 0 5
LUCA TECHNOLOGIES, INC. 0 1 0 2 2 5
NATIONAL-OILWELL, L.P. 2 1 1 0 1 5
OCEAN RISER SYSTEMS AS 1 0 2 1 1 5
OCEANEERING INTERNATIONAL, INC. 4 0 0 1 0 5
PIONEER ENERGY, INC. 0 0 2 3 0 5
PRECISION COMBUSTION, INC. 0 1 2 1 1 5
RESLINK AS 2 2 0 1 0 5
TOTAL SEPARATION SOLUTIONS, LLC 2 1 2 0 0 5
WESTERN WELL TOOL, INC. 3 0 2 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
selected PTMT files available for download at : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/data/


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