- 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 17/07 - Telescoping joints for varying drill string lengthsShock absorbers
Patent holdings for IPC class E21B 17/07
Total number of patents in this class: 693
10-year publication summary
|
56
|
49
|
29
|
26
|
66
|
43
|
38
|
42
|
35
|
21
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21292 |
87 |
| Schlumberger Technology Corporation | 11940 |
41 |
| Baker Hughes Oilfield Operations, LLC | 2555 |
28 |
| Schlumberger Canada Limited | 7610 |
17 |
| Baker Hughes Incorporated | 4883 |
17 |
| Weatherford Technology Holdings, LLC | 2166 |
17 |
| Schlumberger Technology B.v. | 5287 |
16 |
| Services Petroliers Schlumberger | 6022 |
16 |
| Sandvik Intellectual Property AB | 1388 |
14 |
| Bauer Maschinen GmbH | 246 |
12 |
| National Oilwell Varco, L.P. | 1700 |
12 |
| Scientific Drilling International, Inc. | 173 |
12 |
| Lord Corporation | 453 |
11 |
| Saudi Arabian Oil Company | 14369 |
10 |
| Grant Prideco, Inc. | 453 |
9 |
| Baker Hughes, a GE Company, LLC | 2022 |
9 |
| Expro North Sea Limited | 230 |
8 |
| Schlumberger Holdings Limited | 2660 |
7 |
| Cameron International Corporation | 1367 |
7 |
| Prad Research and Development Limited | 2642 |
7 |
| Other owners | 336 |