Patent holdings for IPC class E21B 17/042

Total number of patents in this class: 1580

10-year publication summary

105
115
116
95
98
120
120
83
80
49
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
454
178
Nippon Steel Corporation
6365
125
Halliburton Energy Services, Inc.
20964
69
Sandvik Mining and Construction Tools AB
174
43
Schlumberger Technology Corporation
10898
34
National Oilwell Varco, L.P.
1689
30
Weatherford Technology Holdings, LLC
2028
29
Hydril Company
93
29
Sandvik Intellectual Property AB
1476
29
Baker Hughes Oilfield Operations, LLC
2331
29
Tenaris Connections B.V.
174
26
Nippon Steel & Sumitomo Metal Corporation
1987
25
JFE Steel Corporation
6965
23
Evolution Engineering Inc.
301
22
Saudi Arabian Oil Company
13409
19
Boart Longyear Manufacturing and Distribution Inc.
110
18
Schlumberger Canada Limited
7369
17
Schlumberger Technology B.v.
5184
17
Services Petroliers Schlumberger
5830
17
Baker Hughes Incorporated
5246
16
Other owners 785