- 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 33/14 - Methods or devices for cementing, for plugging holes, crevices, or the like for cementing casings into boreholes
Patent holdings for IPC class E21B 33/14
Total number of patents in this class: 1723
10-year publication summary
|
111
|
173
|
207
|
233
|
159
|
147
|
143
|
137
|
108
|
42
|
| 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 |
513 |
| Saudi Arabian Oil Company | 11322 |
191 |
| Schlumberger Technology Corporation | 9690 |
110 |
| Weatherford Technology Holdings, LLC | 2135 |
82 |
| Schlumberger Canada Limited | 6913 |
43 |
| Schlumberger Technology B.v. | 4951 |
38 |
| Services Petroliers Schlumberger | 5426 |
37 |
| Aramco Services Company | 3504 |
26 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
25 |
| Baker Hughes Holdings LLC | 3060 |
21 |
| Baker Hughes Incorporated | 5689 |
20 |
| ConocoPhillips Company | 1657 |
20 |
| Schlumberger Holdings Limited | 2947 |
18 |
| Prad Research and Development Limited | 2696 |
14 |
| Deltatek Oil Tools Limited | 23 |
12 |
| CURTIS, Philip, Anthony | 497 |
12 |
| Packers Plus Energy Services Inc. | 120 |
11 |
| Thru Tubing Solutions, Inc. | 361 |
11 |
| Shell Internationale Research Maatschappij B.V. | 3792 |
10 |
| Cameron International Corporation | 1305 |
9 |
| Other owners | 500 |