- 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 19/22 - Handling reeled pipe or rod units, e.g. flexible drilling pipes
Patent holdings for IPC class E21B 19/22
Total number of patents in this class: 907
10-year publication summary
|
64
|
50
|
72
|
56
|
49
|
46
|
39
|
31
|
41
|
29
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20911 |
74 |
| Schlumberger Technology Corporation | 10780 |
59 |
| Premier Coil Solutions, Inc. | 70 |
42 |
| National Oilwell Varco, L.P. | 1682 |
36 |
| Schlumberger Canada Limited | 7332 |
26 |
| Schlumberger Technology B.v. | 5176 |
25 |
| Services Petroliers Schlumberger | 5803 |
25 |
| Stimline AS | 26 |
18 |
| Saudi Arabian Oil Company | 13224 |
17 |
| Schlumberger Holdings Limited | 2817 |
14 |
| Itrec B.V. | 504 |
14 |
| Weatherford Technology Holdings, LLC | 2023 |
13 |
| Baker Hughes Holdings LLC | 3007 |
13 |
| Prad Research and Development Limited | 2693 |
12 |
| Coil Solutions, Inc. | 19 |
11 |
| Celtic Machining Ltd. | 11 |
10 |
| Tetra Technologies, Inc. | 100 |
9 |
| Baker Hughes Incorporated | 5274 |
8 |
| Xtreme Drilling and Coil Services Corp. | 12 |
8 |
| Athabasca Oil Corporation | 21 |
7 |
| Other owners | 466 |