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  • All sections
  • E - Fixed constructions
  • E21B - Earth or rock drillingobtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
  • E21B 43/119 - Details, e.g. for locating perforating place or direction

Patent holdings for IPC class E21B 43/119

Total number of patents in this class: 854

10-year publication summary

40
42
45
78
75
82
94
71
76
31
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Halliburton Energy Services, Inc.
20835
193
DYNAenergetics Europe GmbH
245
61
Schlumberger Technology Corporation
10662
59
Hunting Titan, Inc.
245
54
Schlumberger Canada Limited
7273
32
Saudi Arabian Oil Company
12947
31
Schlumberger Technology B.v.
5161
25
Services Petroliers Schlumberger
5772
25
Wells Fargo Bank, National Association
3784
22
ExxonMobil Upstream Research Company
2407
21
Geodynamics, Inc.
191
21
Dorf Ketal Chemicals FZE
197
18
G & H Diversified Manufacturing, LP, Edward Cannoy Kash, U.S. Citizen; Merry Janan Kash, U.S. Citizen
69
17
Schlumberger Holdings Limited
2835
12
Baker Hughes Incorporated
5277
12
Owen Oil Tools LP
90
11
Prad Research and Development Limited
2693
11
XConnect, LLC
49
11
GR Energy Services Management, LP
43
9
Baker Hughes Holdings LLC
3005
9
Other owners 200

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