- 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 33/138 - Plastering the borehole wallInjecting into the formation
Patent holdings for IPC class E21B 33/138
Total number of patents in this class: 1435
10-year publication summary
|
140
|
122
|
168
|
135
|
129
|
63
|
78
|
47
|
80
|
55
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Saudi Arabian Oil Company | 14369 |
285 |
| Halliburton Energy Services, Inc. | 21292 |
250 |
| Schlumberger Technology Corporation | 11940 |
102 |
| Aramco Services Company | 4190 |
37 |
| Thru Tubing Solutions, Inc. | 407 |
37 |
| Schlumberger Canada Limited | 7610 |
35 |
| Schlumberger Technology B.v. | 5287 |
28 |
| Services Petroliers Schlumberger | 6022 |
27 |
| Baker Hughes Holdings LLC | 3010 |
20 |
| Baker Hughes Incorporated | 4883 |
16 |
| ExxonMobil Upstream Research Company | 2285 |
16 |
| Bisn Tec Ltd | 84 |
15 |
| M-I L.L.C. | 732 |
15 |
| Chevron U.S.A. Inc. | 4170 |
14 |
| ConocoPhillips Company | 1714 |
14 |
| Schlumberger Holdings Limited | 2660 |
13 |
| Prad Research and Development Limited | 2642 |
13 |
| Eavor Technologies Inc. | 111 |
12 |
| University of Kansas | 925 |
11 |
| Baker Hughes Oilfield Operations, LLC | 2555 |
11 |
| Other owners | 464 |