- 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 33/138 - Plastering the borehole wall; Injecting into the formation
Patent holdings for IPC class E21B 33/138
Total number of patents in this class: 1366
10-year publication summary
|
123
|
142
|
140
|
122
|
168
|
135
|
128
|
63
|
71
|
13
|
| 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 |
280 |
| Saudi Arabian Oil Company | 11322 |
236 |
| Schlumberger Technology Corporation | 9690 |
81 |
| Schlumberger Canada Limited | 6913 |
40 |
| Thru Tubing Solutions, Inc. | 361 |
36 |
| Aramco Services Company | 3504 |
32 |
| Schlumberger Technology B.v. | 4951 |
31 |
| Services Petroliers Schlumberger | 5426 |
30 |
| Baker Hughes Holdings LLC | 3060 |
20 |
| Schlumberger Holdings Limited | 2947 |
18 |
| Baker Hughes Incorporated | 5689 |
18 |
| ExxonMobil Upstream Research Company | 2525 |
17 |
| M-I L.L.C. | 893 |
17 |
| Bisn Tec Ltd | 74 |
15 |
| ConocoPhillips Company | 1657 |
15 |
| Prad Research and Development Limited | 2696 |
13 |
| University of Kansas | 838 |
11 |
| Eavor Technologies Inc. | 74 |
11 |
| Chevron U.S.A. Inc. | 3774 |
10 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
10 |
| Other owners | 425 |