Patent holdings for IPC class E21B 43/36

Total number of patents in this class: 340

10-year publication summary

51
33
42
24
33
14
12
13
10
3
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Equinor Energy AS
491
26
Statoil Petroleum AS
517
20
ExxonMobil Upstream Research Company
2407
16
Subsea 7 Norway AS
88
13
FMC Kongsberg Subsea AS
252
11
OneSubsea IP UK Limited
419
11
Aker Solutions AS
240
10
Saipem S.A.
228
10
Saudi Arabian Oil Company
12947
10
General Electric Company
13829
9
Shell Internationale Research Maatschappij B.V.
3551
9
FMC Technologies do Brasil Ltda.
66
9
Cameron International Corporation
1332
7
Petroleo Brasileiro S.A. - Petrobras
841
6
Vetco Gray Scandinavia AS
172
6
Halliburton Energy Services, Inc.
20835
5
Chevron U.S.A. Inc.
3947
5
ENI S.p.A.
1258
5
Seabed Separation AS
17
5
Trevelyan Trading Ltd
4
4
Other owners 143