- 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 17/04 - CouplingsJoints between rod and bit, or between rod and rod
Patent holdings for IPC class E21B 17/04
Total number of patents in this class: 615
10-year publication summary
|
63
|
43
|
44
|
35
|
31
|
49
|
38
|
34
|
21
|
23
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 21078 |
106 |
| Schlumberger Technology Corporation | 11054 |
31 |
| Schlumberger Canada Limited | 7432 |
21 |
| Schlumberger Technology B.v. | 5223 |
20 |
| Services Petroliers Schlumberger | 5884 |
20 |
| National Oilwell Varco, L.P. | 1699 |
18 |
| Evolution Engineering Inc. | 300 |
17 |
| Baker Hughes, a GE Company, LLC | 2106 |
13 |
| Weatherford Technology Holdings, LLC | 2033 |
12 |
| Baker Hughes Incorporated | 5175 |
10 |
| Pier Tech Systems, LLC | 33 |
10 |
| Vallourec Oil and Gas France | 459 |
8 |
| Sandvik Mining and Construction Tools AB | 177 |
8 |
| Baker Hughes Oilfield Operations, LLC | 2390 |
7 |
| Odfjell Well Services Norway AS | 19 |
6 |
| Sandvik Intellectual Property AB | 1457 |
6 |
| The Charles Machine Works, Inc. | 410 |
5 |
| Reflex Instruments Asia Pacific Pty Ltd | 87 |
5 |
| KHOLLE Magnolia 2015, LLC | 22 |
5 |
| Chevron U.S.A. Inc. | 4018 |
4 |
| Other owners | 283 |