Patent holdings for IPC class E21B 17/042

Total number of patents in this class: 1561

10-year publication summary

133
131
146
119
121
139
143
101
83
38
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Vallourec Oil and Gas France
453
179
Nippon Steel Corporation
6203
125
Halliburton Energy Services, Inc.
20835
68
Sandvik Mining and Construction Tools AB
173
43
Schlumberger Technology Corporation
10662
33
National Oilwell Varco, L.P.
1661
30
Sandvik Intellectual Property AB
1484
29
Weatherford Technology Holdings, LLC
2015
27
Hydril Company
93
27
Baker Hughes Oilfield Operations, LLC
2288
27
Nippon Steel & Sumitomo Metal Corporation
1988
25
Tenaris Connections B.V.
167
24
JFE Steel Corporation
6809
23
Evolution Engineering Inc.
301
22
Saudi Arabian Oil Company
12947
19
Schlumberger Canada Limited
7273
17
Boart Longyear Manufacturing and Distribution Inc.
112
17
Schlumberger Technology B.v.
5161
16
Baker Hughes Incorporated
5277
16
Services Petroliers Schlumberger
5772
16
Other owners 778