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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 44/02 - Automatic control of the tool feed

Patent holdings for IPC class E21B 44/02

Total number of patents in this class: 922

10-year publication summary

38
34
46
50
60
99
85
72
76
47
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Halliburton Energy Services, Inc.
20879
146
Schlumberger Technology Corporation
10705
116
Schlumberger Canada Limited
7293
82
Services Petroliers Schlumberger
5784
68
Landmark Graphics Corporation
1526
49
Schlumberger Technology B.v.
5166
45
Saudi Arabian Oil Company
13091
27
Motive Drilling Technologies, Inc.
103
25
Geoquest Systems B.V.
744
23
Nabors Drilling Technologies USA, Inc.
558
20
Baker Hughes Oilfield Operations, LLC
2297
16
Baker Hughes, a GE Company, LLC
2112
14
Technological Resources Pty. Limited
452
13
National Oilwell Varco, L.P.
1670
12
Sandvik Mining and Construction Oy
826
12
Pason Systems Corp.
79
10
Baker Hughes Incorporated
5252
9
Vermeer Manufacturing Company
634
9
ExxonMobil Upstream Research Company
2403
8
Caterpillar Global Mining Equipment LLC
160
7
Other owners 211

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