- All sections
- E - Fixed constructions
- E21B - Earth or rock drilling; obtaining 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: 890
10-year publication summary
|
81
|
83
|
59
|
85
|
64
|
58
|
53
|
49
|
31
|
12
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20165 |
61 |
| Schlumberger Technology Corporation | 9690 |
46 |
| Premier Coil Solutions, Inc. | 65 |
39 |
| National Oilwell Varco, L.P. | 1604 |
35 |
| Schlumberger Canada Limited | 6913 |
27 |
| Schlumberger Technology B.v. | 4951 |
25 |
| Services Petroliers Schlumberger | 5426 |
25 |
| Stimline AS | 26 |
18 |
| Xtreme Drilling and Coil Services Corp. | 22 |
17 |
| Schlumberger Holdings Limited | 2947 |
15 |
| Itrec B.V. | 477 |
14 |
| Saudi Arabian Oil Company | 11322 |
14 |
| Baker Hughes Holdings LLC | 3060 |
14 |
| Weatherford Technology Holdings, LLC | 2135 |
13 |
| Prad Research and Development Limited | 2696 |
12 |
| Celtic Machining Ltd. | 11 |
10 |
| Coil Solutions, Inc. | 18 |
10 |
| Baker Hughes Incorporated | 5689 |
9 |
| Tetra Technologies, Inc. | 90 |
9 |
| Xtreme Coil Drilling Corp. | 9 |
8 |
| Other owners | 469 |