- 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: 1570
10-year publication summary
|
120
|
131
|
111
|
136
|
91
|
89
|
70
|
52
|
63
|
31
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21318 |
197 |
| Schlumberger Technology Corporation | 11857 |
86 |
| Weatherford Technology Holdings, LLC | 2162 |
67 |
| Saudi Arabian Oil Company | 14296 |
66 |
| Baker Hughes Incorporated | 4916 |
57 |
| Schlumberger Canada Limited | 7613 |
33 |
| Schlumberger Technology B.v. | 5297 |
31 |
| National Oilwell Varco, L.P. | 1702 |
30 |
| Grant Prideco, Inc. | 446 |
28 |
| Services Petroliers Schlumberger | 6029 |
27 |
| Pruitt Tool & Supply Co. | 75 |
24 |
| Thru Tubing Solutions, Inc. | 404 |
24 |
| Aramco Services Company | 4193 |
21 |
| Nabors Drilling Technologies USA, Inc. | 575 |
20 |
| Baker Hughes, a GE Company, LLC | 2051 |
19 |
| Schlumberger Holdings Limited | 2686 |
17 |
| Prad Research and Development Limited | 2654 |
16 |
| Baker Hughes Oilfield Operations, LLC | 2539 |
15 |
| Black Diamond Oilfield Rentals LLC | 67 |
13 |
| Baker Hughes Holdings LLC | 3024 |
13 |
| Other owners | 766 |