Patent holdings for IPC class E21B 47/003

Total number of patents in this class: 173

10-year publication summary

5
6
6
12
24
29
17
10
15
0
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Saudi Arabian Oil Company
12423
20
Halliburton Energy Services, Inc.
20419
19
Schlumberger Technology Corporation
10241
17
Landmark Graphics Corporation
1521
9
Chevron U.S.A. Inc.
3854
9
Schlumberger Canada Limited
7147
8
Services Petroliers Schlumberger
5626
7
ExxonMobil Upstream Research Company
2454
5
Schlumberger Technology B.v.
5068
3
ConocoPhillips Company
1677
3
Geoquest Systems B.V.
681
3
Prad Research and Development Limited
2696
3
SunCor Energy Inc.
766
3
Equinor Energy AS
488
3
Schlumberger Holdings Limited
2867
2
Baker Hughes Incorporated
5508
2
Aver Technologies, Inc.
13
2
Four Flags Pty Ltd
6
2
RS Energy Group Topco, Inc. CA
16
2
Baker Hughes Holdings LLC
3009
2
Other owners 49