- 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 21/10 - Valves arrangements in drilling-fluid circulation systems
Patent holdings for IPC class E21B 21/10
Total number of patents in this class: 1540
10-year publication summary
|
125
|
120
|
131
|
109
|
135
|
90
|
87
|
69
|
45
|
32
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20908 |
199 |
| Schlumberger Technology Corporation | 10745 |
79 |
| Weatherford Technology Holdings, LLC | 2024 |
66 |
| Saudi Arabian Oil Company | 13206 |
63 |
| Baker Hughes Incorporated | 5238 |
61 |
| Schlumberger Canada Limited | 7298 |
34 |
| Schlumberger Technology B.v. | 5163 |
31 |
| Grant Prideco, Inc. | 386 |
28 |
| National Oilwell Varco, L.P. | 1669 |
28 |
| Services Petroliers Schlumberger | 5788 |
27 |
| Thru Tubing Solutions, Inc. | 379 |
22 |
| Aramco Services Company | 3981 |
20 |
| Nabors Drilling Technologies USA, Inc. | 556 |
20 |
| Pruitt Tool & Supply Co. | 69 |
20 |
| Schlumberger Holdings Limited | 2819 |
19 |
| Baker Hughes, a GE Company, LLC | 2112 |
19 |
| Prad Research and Development Limited | 2693 |
16 |
| Coretrax Global Limited | 36 |
15 |
| Black Diamond Oilfield Rentals LLC | 66 |
13 |
| Baker Hughes Holdings LLC | 3005 |
13 |
| Other owners | 747 |