- 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 33/13 - Methods or devices for cementing, for plugging holes, crevices or the like
Patent holdings for IPC class E21B 33/13
Total number of patents in this class: 2592
10-year publication summary
|
222
|
172
|
152
|
146
|
170
|
123
|
87
|
78
|
91
|
9
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21117 |
674 |
| Schlumberger Technology Corporation | 11238 |
158 |
| Saudi Arabian Oil Company | 13814 |
134 |
| Schlumberger Canada Limited | 7485 |
105 |
| Schlumberger Technology B.v. | 5239 |
88 |
| Services Petroliers Schlumberger | 5916 |
87 |
| Thru Tubing Solutions, Inc. | 382 |
74 |
| ConocoPhillips Company | 1697 |
56 |
| Baker Hughes Incorporated | 5140 |
52 |
| Schlumberger Holdings Limited | 2757 |
44 |
| Baker Hughes Holdings LLC | 2991 |
43 |
| Prad Research and Development Limited | 2686 |
41 |
| Weatherford Technology Holdings, LLC | 2033 |
36 |
| Bisn Tec Ltd | 81 |
36 |
| Hydra Systems AS | 36 |
28 |
| Baker Hughes Oilfield Operations, LLC | 2402 |
22 |
| Baker Hughes, a GE Company, LLC | 2101 |
22 |
| Aramco Services Company | 4147 |
21 |
| Shell Internationale Research Maatschappij B.V. | 3517 |
17 |
| ExxonMobil Upstream Research Company | 2364 |
17 |
| Other owners | 837 |