E21B 47/138
Devices entrained in the flow of well-bore fluid for transmitting data, control
Official title: {Devices entrained in the flow of well-bore fluid for transmitting data, control or actuation signals}
E21B47/138 (Devices entrained in the flow of well-bore fluid for transmitting data, control) appears on 314 US grants and 397 published applications in this corpus.
Search patents in E21B- Granted patents
- 314
- Published applications
- 397
- Assignees
- 104
- Inventors
- 742
- Latest grant
- 15 Sep 2026
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| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
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| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 4 | 3 |
| 2003 | 3 | 4 |
| 2004 | 2 | 5 |
| 2005 | 5 | 8 |
| 2006 | 3 | 3 |
| 2007 | 1 | 3 |
| 2008 | 5 | 2 |
| 2009 | 1 | 6 |
| 2010 | 2 | 9 |
| 2011 | 1 | 12 |
| 2012 | 8 | 8 |
| 2013 | 5 | 16 |
| 2014 | 4 | 32 |
| 2015 | 16 | 28 |
| 2016 | 24 | 17 |
| 2017 | 17 | 23 |
| 2018 | 18 | 29 |
| 2019 | 28 | 19 |
| 2020 | 26 | 28 |
| 2021 | 18 | 25 |
| 2022 | 23 | 23 |
| 2023 | 32 | 30 |
| 2024 | 26 | 32 |
| 2025 | 21 | 20 |
| 2026 | 17 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dynamic load resistant drilling system15 Sep 2026US 12,735,974 B2Schlumberger Technology Corporation
- Using radio isotopes as a triggering element in downhole applications8 Sep 2026US 12,729,623 B2Halliburton Energy Services.Inc.
- Actuation device for actuating a target sleeve valve assembly, and related systems and methods18 Aug 2026US 12,709,961 B2ExxonMobil Technology and Engineering Company
- Methods and systems related to remote measuring and sensing18 Aug 2026US 12,711,335 B2William Marsh Rice University
- Autonomous microsystem for immersion into fluid11 Aug 2026US 12,704,213 B2The Regents of the University of Michigan
- Untethered logging devices and related methods of logging a wellbore8 Oct 2026US 2026/0309027 A1Saudi Arabian Oil Company
- Drilling system for lithium recovery1 Oct 2026US 2026/0298070 A1Saudi Arabian Oil Company
- Calibration methods for oil based mud imager tools17 Sep 2026US 2026/0275856 A1Halliburton Energy Services.Inc.
- Radio frequency identifier based telemetry for surface and downhole communication13 Aug 2026US 2026/0235026 A1Schlumberger Technology Corporation
- Drill cuttings lag time monitoring30 Jul 2026US 2026/0218576 A1Schlumberger Technology Corporation
Most cited
By later US patents
- Use of micro-electro-mechanical systems (MEMS) in well treatments247US 8,316,936 B2Halliburton Energy Services.Inc. · 2012
- Method of utilizing flowable devices in wellbores206US 6,443,228 B1Baker Hughes Incorporated · 2002
- Method and apparatus for placing and interrogating downhole sensors189US 6,408,943 B1Halliburton Energy Services.Inc. · 2002
- Methods of servicing a well bore using self-activating downhole tool183US 7,322,416 B2Halliburton Energy Services.Inc. · 2008
- Means and method for assessing the geometry of a subterranean fracture during or after a hydraulic fracturing treatment175US 7,082,993 B2Schlumberger Technology Corporation · 2006