- 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: 903
10-year publication summary
83
|
59
|
85
|
64
|
58
|
53
|
50
|
32
|
42
|
27
|
2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Halliburton Energy Services, Inc. | 20835 |
74 |
Schlumberger Technology Corporation | 10662 |
57 |
Premier Coil Solutions, Inc. | 70 |
42 |
National Oilwell Varco, L.P. | 1661 |
36 |
Schlumberger Canada Limited | 7273 |
25 |
Schlumberger Technology B.v. | 5161 |
24 |
Services Petroliers Schlumberger | 5772 |
24 |
Stimline AS | 27 |
18 |
Saudi Arabian Oil Company | 12947 |
16 |
Schlumberger Holdings Limited | 2835 |
14 |
Itrec B.V. | 503 |
14 |
Weatherford Technology Holdings, LLC | 2015 |
13 |
Baker Hughes Holdings LLC | 3005 |
13 |
Prad Research and Development Limited | 2693 |
12 |
Coil Solutions, Inc. | 19 |
11 |
Celtic Machining Ltd. | 11 |
10 |
Tetra Technologies, Inc. | 102 |
9 |
Xtreme Drilling and Coil Services Corp. | 14 |
9 |
Baker Hughes Incorporated | 5277 |
8 |
Athabasca Oil Corporation | 21 |
7 |
Other owners | 467 |