- 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: 1559
10-year publication summary
|
120
|
131
|
111
|
136
|
91
|
88
|
70
|
51
|
60
|
7
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21217 |
196 |
| Schlumberger Technology Corporation | 11485 |
82 |
| Weatherford Technology Holdings, LLC | 2068 |
65 |
| Saudi Arabian Oil Company | 13953 |
65 |
| Baker Hughes Incorporated | 5041 |
60 |
| Schlumberger Canada Limited | 7558 |
33 |
| Schlumberger Technology B.v. | 5267 |
30 |
| Grant Prideco, Inc. | 427 |
28 |
| National Oilwell Varco, L.P. | 1690 |
28 |
| Services Petroliers Schlumberger | 5977 |
26 |
| Pruitt Tool & Supply Co. | 73 |
23 |
| Thru Tubing Solutions, Inc. | 393 |
22 |
| Aramco Services Company | 4162 |
21 |
| Nabors Drilling Technologies USA, Inc. | 573 |
20 |
| Baker Hughes, a GE Company, LLC | 2094 |
19 |
| Schlumberger Holdings Limited | 2735 |
18 |
| Prad Research and Development Limited | 2679 |
16 |
| Black Diamond Oilfield Rentals LLC | 67 |
13 |
| Baker Hughes Oilfield Operations, LLC | 2441 |
13 |
| Baker Hughes Holdings LLC | 2992 |
13 |
| Other owners | 768 |