Patent holdings for IPC class E21B 21/02

Total number of patents in this class: 93

10-year publication summary

11
11
12
9
5
9
3
4
1
0
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Weatherford Technology Holdings, LLC
2009
10
Halliburton Energy Services, Inc.
20684
6
National Oilwell Varco, L.P.
1640
6
Epiroc Rock Drills Aktiebolag
489
5
Atlas Copco Rock Drills AB
152
4
Sandbox Enterprises LLC
136
4
Boart Longyear Manufacturing and Distribution Inc.
110
3
Bauer Maschinen GmbH
215
2
Deublin Company
45
2
Forum US, Inc.
330
2
Frank's International, LLC
237
2
Mako Rentals, Inc.
59
2
Meccanotecnica Umbra S.p.A.
25
2
Nabors Drilling Technologies USA, Inc.
556
2
Tesco Corporation
73
2
Deublin Company, LLC
31
2
Caterpillar Inc.
9417
1
Chevron U.S.A. Inc.
3912
1
Aker Wirth GmbH
19
1
Aktiebolaget SKF
2916
1
Other owners 33