Patent holdings for IPC class E21B 47/26

Total number of patents in this class: 577

10-year publication summary

13
34
33
26
10
17
30
34
92
66
2013 2014 2015 2016 2017 2018 2019 2020 2021 2022

Principal owners for this class

Owner
All patents
This class
Halliburton Energy Services, Inc.
19653
104
Schlumberger Technology Corporation
9139
62
Schlumberger Canada Limited
6524
61
Services Petroliers Schlumberger
5119
59
Schlumberger Technology B.v.
4726
36
Landmark Graphics Corporation
1544
30
Geoquest Systems B.V.
449
21
Saudi Arabian Oil Company
9448
21
Baker Hughes Incorporated
7120
17
Prad Research and Development Limited
2697
15
Schlumberger Holdings Limited
3090
14
Baker Hughes Oilfield Operations, LLC
1250
12
Weatherford Technology Holdings, LLC
2505
7
Sanvean Technologies LLC
35
6
Aramco Services Company
3207
5
Evolution Engineering Inc.
318
5
ExxonMobil Upstream Research Company
2837
4
Hifi Engineering Inc.
109
3
Reflex Instruments Asia Pacific Pty Ltd
70
3
Baker Hughes, a GE Company, LLC
2983
3
Other owners 89