- 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 44/06 - Automatic control of the tool feed in response to the flow or pressure of the motive fluid of the drive
Patent holdings for IPC class E21B 44/06
Total number of patents in this class: 252
10-year publication summary
|
14
|
19
|
11
|
19
|
19
|
26
|
19
|
22
|
18
|
6
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Halliburton Energy Services, Inc. | 20901 |
28 |
| Schlumberger Technology Corporation | 10727 |
24 |
| Schlumberger Canada Limited | 7296 |
12 |
| Saudi Arabian Oil Company | 13185 |
11 |
| Pason Systems Corp. | 78 |
10 |
| Services Petroliers Schlumberger | 5787 |
9 |
| Epiroc Rock Drills Aktiebolag | 513 |
9 |
| Schlumberger Technology B.v. | 5165 |
8 |
| Baker Hughes Incorporated | 5241 |
7 |
| Motive Drilling Technologies, Inc. | 103 |
7 |
| Nabors Drilling Technologies USA, Inc. | 556 |
7 |
| National Oilwell Varco, L.P. | 1669 |
7 |
| Atlas Copco Rock Drills AB | 143 |
5 |
| Magnetic Variation Services, LLC | 38 |
5 |
| Baker Hughes, a GE Company, LLC | 2112 |
5 |
| Shell USA, Inc. | 1217 |
5 |
| Smith International, Inc. | 717 |
4 |
| Schlumberger Holdings Limited | 2822 |
3 |
| M-I L.L.C. | 808 |
3 |
| National Oilwell DHT, L.P. | 129 |
3 |
| Other owners | 80 |