- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B 34/16 - Control means therefor being outside the borehole
Patent holdings for IPC class E21B 34/16
Total number of patents in this class: 630
10-year publication summary
|
66
|
51
|
49
|
61
|
61
|
75
|
55
|
42
|
31
|
9
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
102 |
| Saudi Arabian Oil Company | 11322 |
39 |
| Schlumberger Technology Corporation | 9690 |
35 |
| Hydril USA Distribution LLC | 206 |
29 |
| Weatherford Technology Holdings, LLC | 2135 |
23 |
| Baker Hughes Incorporated | 5689 |
19 |
| The Wellboss Company, LLC | 96 |
19 |
| Schlumberger Canada Limited | 6913 |
17 |
| National Oilwell Varco, L.P. | 1604 |
17 |
| Services Petroliers Schlumberger | 5426 |
15 |
| Schlumberger Technology B.v. | 4951 |
12 |
| Transocean Innovation Labs Ltd | 46 |
12 |
| Cameron International Corporation | 1305 |
11 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
10 |
| Metrol Technology Limited | 85 |
9 |
| Aramco Services Company | 3504 |
7 |
| OneSubsea IP UK Limited | 378 |
7 |
| Kobold Corp. | 42 |
7 |
| National Coupling Company, Inc. | 61 |
6 |
| Schlumberger Holdings Limited | 2947 |
5 |
| Other owners | 229 |