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

Patenting In Technology Classes,
Breakout By Organization

Count of 2008 - 2012 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 2008 2009 2010 2011 2012 Total
SCHLUMBERGER TECHNOLOGY CORPORATION 112 91 176 148 170 697
BAKER HUGHES INCORPORATED 77 114 152 122 153 618
HALLIBURTON ENERGY SERVICES, INC. 122 81 123 104 151 581
~INDIVIDUALLY OWNED PATENT 82 55 102 69 82 390
WEATHERFORD/LAMB, INC. 52 30 51 45 33 211
SHELL OIL COMPANY 27 36 30 21 26 140
VETCO GRAY INC 9 7 18 18 46 98
BJ SERVICES CO 18 20 23 6 0 67
EXXONMOBIL UPSTREAM RESEARCH COMPANY 7 8 12 9 17 53
STINGER WELLHEAD PROTECTION, INC. 6 10 12 8 5 41
ENVENTURE GLOBAL TECHNOLOGY L.L.C. 12 9 9 4 6 40
TESCO CORP 3 3 18 7 8 39
SMITH INTERNATIONAL INC. 11 3 9 8 6 37
CHEVRON U.S.A. INC. 1 3 9 8 7 28
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 7 6 5 2 3 23
FRANK'S CASING CREW & RENTAL TOOLS, INC. 2 2 2 8 8 22
SAUDI ARABIAN OIL COMPANY 6 1 6 0 8 21
CONOCOPHILLIPS COMPANY 2 1 6 6 5 20
CAMERON INTERNATIONAL CORPORATION 6 2 2 4 4 18
MAKO RENTALS, INC. 0 4 6 2 6 18
HYDRIL USA MANUFACTURING LLC 1 1 3 2 10 17
NATIONAL-OILWELL VARCO, L.P. 0 1 5 4 7 17
PETROQUIP ENERGY SERVICES, LLP 5 3 0 2 4 14
FMC TECHNOLOGIES, INC. 3 4 2 3 1 13
PRODUCTION CONTROL SERVICES, INC. 4 4 2 3 0 13
RED SPIDER TECHNOLOGY LIMITED 0 1 1 2 9 13
BP CORPORATION NORTH AMERICA INC. 2 1 2 2 5 12
PINE TREE GAS, LLC 0 0 5 3 4 12
STREAM-FLO INDUSTRIES LTD. 1 3 2 4 2 12
FRANK'S INTERNATIONAL, INC. 2 1 1 5 2 11
BJ SERVICES COMPANY LLC 0 0 9 1 0 10
DRIL-QUIP, INC. 4 2 1 0 3 10
PACKERS PLUS ENERGY SERVICES INC. 2 1 3 3 1 10
STATOIL ASA 1 1 2 2 4 10
WELLDYNAMICS INC. 1 2 4 2 1 10
CAMERON SYSTEMS (IRELAND) LIMITED 0 0 0 3 6 9
CLEARWATER INTERNATIONAL LLC. 2 2 1 4 0 9
SWELLTEC LIMITED 0 0 1 3 5 9
VARCO I/P, INC. 4 2 3 0 0 9
E. I. DU PONT DE NEMOURS AND COMPANY 1 0 4 2 1 8
M-I L.L.C 2 3 2 0 1 8
OWEN OIL TOOLS LP. 2 3 0 2 1 8
PRECISION ENERGY SERVICES, INC. 1 2 3 1 1 8
RHODIA INC. 2 0 6 0 0 8
ROBBINS & MYERS ENERGY SYSTEMS, L.P. 1 1 3 1 2 8
TIW CORPORATION 3 1 1 1 2 8
BP EXPLORATION OPERATING COMPANY LIMITED 1 1 2 2 1 7
ENCANA CORPORATION 0 2 0 2 3 7
GEOSIERRA, LLC 1 3 1 2 0 7
GULFSTREAM SERVICES, INC. 0 1 1 2 3 7
HPD, LLC 0 3 1 3 0 7
HUDSON SERVICES, INC. 2 1 1 2 1 7
KELLOGG BROWN & ROOT LLC 1 3 2 1 0 7
ROBERTSON INTELLECTUAL PROPERTIES, LLC 0 0 1 3 3 7
XTREME COIL DRILLING CORP. 2 2 2 0 1 7
ARCHON TECHNOLOGIES LTD. 0 2 1 2 1 6
BESST, INC 0 3 1 1 1 6
GE IONICS, INC. 2 0 3 0 1 6
ISOLATION EQUIPMENT SERVICES INC. 0 2 1 1 2 6
LUCA TECHNOLOGIES, INC. 1 0 2 2 1 6
NORSK HYDRO ASA 2 2 2 0 0 6
PETROLEO BRASILEIRO S.A. PETROBRAS 3 1 0 1 1 6
PRECISION COMBUSTION, INC. 1 2 1 1 1 6
T-3 PROPERTY HOLDINGS, INC. 0 0 1 0 5 6
VETCO GRAY CONTROLS LIMITED 0 0 2 1 3 6
VETCO GRAY SCANDINAVIA AS 1 1 0 1 3 6
WELL MASTER CORP 1 1 2 0 2 6
WOOD GROUP ESP, INC. 5 1 0 0 0 6
WORLD ENERGY SYSTEMS, INCORPORATED 0 0 2 0 4 6
AKER SUBSEA, INC. 0 0 1 0 4 5
CDX GAS, LLC 4 1 0 0 0 5
DUHN OIL TOOL, INC. 2 2 1 0 0 5
HAMDEEN INCORPORATED LIMITED 2 1 1 1 0 5
INTELLIGENT TOOLS IP, LLC 0 0 2 1 2 5
INTELLISERV, LLC 0 0 2 1 2 5
OCEAN RISER SYSTEMS AS 0 2 1 1 1 5
PILOT DRILLING CONTROL LIMITED 0 0 1 3 1 5
PIONEER ENERGY, INC. 0 2 3 0 0 5
SUPERIOR ENERGY SERVICES, L.L.C. 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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