- 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 47/01 - Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
Patent holdings for IPC class E21B 47/01
Total number of patents in this class: 2299
10-year publication summary
|
212
|
176
|
180
|
184
|
182
|
117
|
124
|
102
|
98
|
23
|
| 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 |
428 |
| Schlumberger Technology Corporation | 9690 |
167 |
| Baker Hughes Incorporated | 5689 |
128 |
| Schlumberger Canada Limited | 6913 |
124 |
| Services Petroliers Schlumberger | 5426 |
111 |
| Schlumberger Technology B.v. | 4951 |
106 |
| Evolution Engineering Inc. | 313 |
76 |
| Saudi Arabian Oil Company | 11322 |
71 |
| Schlumberger Holdings Limited | 2947 |
66 |
| Prad Research and Development Limited | 2696 |
58 |
| Baker Hughes, a GE Company, LLC | 2171 |
50 |
| Baker Hughes Oilfield Operations, LLC | 1885 |
46 |
| Baker Hughes Holdings LLC | 3060 |
44 |
| Merlin Technology, Inc. | 165 |
19 |
| ExxonMobil Upstream Research Company | 2525 |
18 |
| Weatherford Technology Holdings, LLC | 2135 |
16 |
| Aramco Services Company | 3504 |
16 |
| Petromac IP Limited | 30 |
16 |
| Welltec AS | 301 |
15 |
| Sondex Wireline Limited | 41 |
11 |
| Other owners | 713 |