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

Patenting In Technology Classes,
Breakout By Organization

Count of 2011 - 2015 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 2011 2012 2013 2014 2015 Total
HALLIBURTON ENERGY SERVICES, INC. 104 151 189 249 238 931
SCHLUMBERGER TECHNOLOGY CORPORATION 148 170 176 164 158 816
BAKER HUGHES INCORPORATED 122 153 144 166 182 767
~INDIVIDUALLY OWNED PATENT 69 82 92 116 124 483
WEATHERFORD/LAMB, INC. 45 33 30 49 11 168
VETCO GRAY INC 18 46 26 34 26 150
SHELL OIL COMPANY 21 26 22 25 22 116
CAMERON INTERNATIONAL CORPORATION 4 4 23 36 46 113
EXXONMOBIL UPSTREAM RESEARCH COMPANY 9 17 23 21 17 87
CHEVRON U.S.A. INC. 8 7 11 16 25 67
CONOCOPHILLIPS COMPANY 6 5 20 19 13 63
SMITH INTERNATIONAL INC. 8 6 12 11 15 52
NATIONAL-OILWELL VARCO, L.P. 4 7 8 15 13 47
SAUDI ARABIAN OIL COMPANY 0 8 9 19 10 46
HARRIS CORP. 0 0 4 10 22 36
WEATHERFORD TECHNOLOGY HOLDINGS, LLC 0 0 0 0 33 33
HYDRIL USA MANUFACTURING LLC 2 10 10 5 3 30
THRU TUBING SOLUTIONS, INC. 1 3 14 3 8 29
TESCO CORP 7 8 2 4 6 27
BP CORPORATION NORTH AMERICA INC. 2 5 10 1 7 25
ENVENTURE GLOBAL TECHNOLOGY L.L.C. 4 6 3 4 6 23
FRANK'S CASING CREW & RENTAL TOOLS, INC. 8 8 2 5 0 23
SWELLTEC LIMITED 3 5 9 4 1 22
MAKO RENTALS, INC. 2 6 6 4 3 21
E. I. DU PONT DE NEMOURS AND COMPANY 2 1 12 1 2 18
M-I L.L.C 0 1 4 8 5 18
PACKERS PLUS ENERGY SERVICES INC. 3 1 2 3 9 18
PETROWELL LIMITED 1 0 3 9 5 18
TECHNIP FRANCE 0 1 5 6 5 17
CAMERON SYSTEMS (IRELAND) LIMITED 3 6 3 4 0 16
SPECIALISED PETROLEUM SERVICES GROUP LIMITED 2 3 2 5 2 14
TRENDSETTER ENGINEERING, INC. 0 0 1 3 10 14
AKER SUBSEA AS 0 0 0 4 9 13
GULFSTREAM SERVICES, INC. 2 3 1 3 4 13
STATOIL ASA 2 4 5 1 1 13
STINGER WELLHEAD PROTECTION, INC. 8 5 0 0 0 13
T-3 PROPERTY HOLDINGS, INC. 0 5 6 2 0 13
WORLD ENERGY SYSTEMS, INCORPORATED 0 4 4 4 1 13
3M INNOVATIVE PROPERTIES COMPANY 0 2 4 4 2 12
DRIL-QUIP, INC. 0 3 3 0 6 12
ENOVATE SYSTEMS LIMITED 2 0 2 1 7 12
FRANK'S INTERNATIONAL, LLC 0 0 0 3 9 12
MAERSK OLIE OG GAS A/S 2 1 0 5 4 12
RED SPIDER TECHNOLOGY LIMITED 2 9 1 0 0 12
BASF SE 0 0 4 6 1 11
FRANK'S INTERNATIONAL, INC. 5 2 2 2 0 11
TEAM OIL TOOLS, LP 0 1 3 2 5 11
WELLTEC A/S 1 0 0 0 10 11
GEODYNAMICS, INC. 0 1 1 2 6 10
OIL STATES ENERGY SERVICES, L.L.C. 0 0 0 6 4 10
REELWELL AS 1 2 1 2 4 10
SIEMENS AKTIENGESELLSCHAFT 0 2 3 3 2 10
STREAM-FLO INDUSTRIES LTD. 4 2 3 0 1 10
VETCO GRAY SCANDINAVIA AS 1 3 0 3 3 10
VITRUVIAN EXPLORATION, LLC 1 3 6 0 0 10
ZEITECS B. V. 0 0 5 3 2 10
BP EXPLORATION OPERATING COMPANY LIMITED 2 1 3 2 1 9
FORO ENERGY, INC. 0 0 0 7 2 9
IFP ENERGIES NOUVELLES 0 0 4 5 0 9
PETROLEUM TECHNOLOGY COMPANY AS 0 4 0 3 2 9
STATOIL PETROLEUM AS 0 0 1 5 3 9
VETCO GRAY CONTROLS LIMITED 1 3 1 3 1 9
CLEARWATER INTERNATIONAL LLC. 4 0 0 2 2 8
ENI S.P.A. 0 1 3 2 2 8
PILOT DRILLING CONTROL LIMITED 3 1 2 2 0 8
PINE TREE GAS, LLC 3 4 1 0 0 8
TRICAN WELL SERVICE LTD. 0 1 2 3 2 8
XTREME DRILLING AND COIL SERVICES CORP. 0 2 3 3 0 8
ANTELOPE OIL TOOL & MFG. CO., LLC 0 0 0 7 0 7
ENCANA CORPORATION 2 3 1 1 0 7
FMC KONGSBERG SUBSEA AS 0 1 0 4 2 7
I-TEC AS 0 1 2 1 3 7
ISOLATION EQUIPMENT SERVICES INC. 1 2 1 0 3 7
PETROLEO BRASILEIRO S.A. PETROBRAS 1 1 3 0 2 7
PETROQUIP ENERGY SERVICES, LLP 2 4 1 0 0 7
AKER SUBSEA LIMITED 0 0 1 3 2 6
BJ SERVICES CO 6 0 0 0 0 6
CANRIG DRILLING TECHNOLOGY LTD. 1 0 0 4 1 6
EXELIS INC. 0 2 1 2 1 6
GEOSERVICES EQUIPEMENTS 0 1 1 1 3 6
INTELLISERV, LLC 1 2 0 3 0 6
INTEVEP, S.A. 0 1 0 0 5 6
NALCO COMPANY 0 0 0 1 5 6
NATIONAL BOSS HOG ENERGY SERVICES LLC 0 0 0 0 6 6
OCEAN RISER SYSTEMS AS 1 1 1 1 2 6
OWEN OIL TOOLS LP. 2 1 1 1 1 6
RHODIA OPERATIONS 0 1 1 1 3 6
ROBERTSON INTELLECTUAL PROPERTIES, LLC 3 3 0 0 0 6
S.P.C.M. SA 0 1 1 3 1 6
SALTEL INDUSTRIES 0 3 0 0 3 6
SUPERIOR ENERGY SERVICES, L.L.C. 1 2 0 3 0 6
TIW CORPORATION 1 2 2 1 0 6
WELL MASTER CORP 0 2 1 2 1 6
WINTERSHALL HOLDING GMBH 0 0 1 1 4 6
AKER SUBSEA, INC. 0 4 1 0 0 5
AKER WELL SERVICE AS 0 1 3 1 0 5
AMERICAN SHALE OIL, LLC 1 1 1 1 1 5
CARBO CERAMICS INC. 1 1 0 0 3 5
CIRIS ENERGY, INC. 0 2 2 1 0 5
DELAFIELD CORPORATION 4 0 1 0 0 5
EXXONMOBIL RESEARCH AND ENGINEERING COMPANY 0 2 3 0 0 5
FCCL PARTNERSHIP 0 1 0 2 2 5
FMC TECHNOLOGIES, INC. 3 1 0 0 1 5
GAS-FRAC ENERGY SERVICES INC. 1 1 1 1 1 5
GENERAL SYNFUELS INTERNATIONAL, INC. 0 3 1 1 0 5
ITREC B.V. 0 0 2 0 3 5
JAMES K. AND MARY SANDERS FAMILY LLC 0 1 3 1 0 5
ONESUBSEA IP UK LIMITED 0 0 0 0 5 5
ONESUBSEA, L.L.C 0 0 0 0 5 5
PRUITT TOOL & SUPPLY CO. 0 1 1 1 2 5
SIEM WIS AS 1 1 1 0 2 5
SINGLE BUOY MOORINGS INC. 1 1 1 1 1 5
T & T ENGINEERING SERVICES, INC. 1 1 2 1 0 5
TEJAS RESEARCH & ENGINEERING, LLC 0 0 0 1 4 5
TETRA TECHNOLOGIES, INC. 0 2 1 1 1 5
TOTAL S.A. 1 0 2 1 1 5
TRANSOCEAN SEDCO FOREX VENTURES LIMITED 1 0 0 3 1 5
WWT INTERNATIONAL, INC. 1 1 2 1 0 5
XYLECO, INC. 1 0 2 1 1 5



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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

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selected PTMT files available for download at : http://www.uspto.gov/web/offices/ac/ido/oeip/taf/data/


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