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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 1/02 - Surface drives for drop hammers, e.g. with a cable

Patent holdings for IPC class E21B 1/02

Total number of patents in this class: 60

10-year publication summary

7
7
4
9
6
2
3
2
1
0
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Epiroc Rock Drills Aktiebolag
512
5
Halliburton Energy Services, Inc.
20835
4
Sandvik Intellectual Property AB
1484
4
Sandvik Mining and Construction Oy
819
4
Capella Partners XI LLC
10
3
Schlumberger Technology Corporation
10662
2
Schlumberger Canada Limited
7273
2
Atlas Copco Rock Drills AB
143
2
Montabert
59
2
REI, Inc.
23
2
Services Petroliers Schlumberger
5772
2
Schlumberger Technology B.v.
5161
1
ABI Anlagentechnik-Baumaschinen-Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH
48
1
Berry Metal Company
52
1
Canrig Drilling Technology Ltd.
68
1
Doofor Oy
5
1
Furukawa Rock Drill Co., Ltd.
36
1
Geoquest Systems B.V.
736
1
J.H. Fletcher & Co.
79
1
JW Tooling, LLC
2
1
Other owners 19

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