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 |