E21B 47/12
Means for transmitting measuring-signals or control signals from the well to the
Official title: Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
E21B47/12 (Means for transmitting measuring-signals or control signals from the well to the) appears on 5,887 US grants and 6,261 published applications in this corpus.
Search patents in E21B- Granted patents
- 5,887
- Published applications
- 6,261
- Assignees
- 1,062
- Inventors
- 8,075
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 28 | 0 |
| 1978 | 19 | 0 |
| 1979 | 16 | 0 |
| 1980 | 19 | 0 |
| 1981 | 19 | 0 |
| 1982 | 10 | 0 |
| 1983 | 16 | 0 |
| 1984 | 16 | 0 |
| 1985 | 25 | 0 |
| 1986 | 26 | 0 |
| 1987 | 27 | 0 |
| 1988 | 28 | 0 |
| 1989 | 38 | 0 |
| 1990 | 27 | 0 |
| 1991 | 24 | 0 |
| 1992 | 33 | 0 |
| 1993 | 24 | 0 |
| 1994 | 26 | 0 |
| 1995 | 22 | 0 |
| 1996 | 33 | 0 |
| 1997 | 17 | 0 |
| 1998 | 27 | 0 |
| 1999 | 37 | 0 |
| 2000 | 44 | 0 |
| 2001 | 54 | 16 |
| 2002 | 56 | 75 |
| 2003 | 59 | 85 |
| 2004 | 63 | 114 |
| 2005 | 75 | 120 |
| 2006 | 90 | 93 |
| 2007 | 98 | 101 |
| 2008 | 70 | 110 |
| 2009 | 76 | 132 |
| 2010 | 78 | 139 |
| 2011 | 84 | 156 |
| 2012 | 93 | 140 |
| 2013 | 95 | 227 |
| 2014 | 145 | 277 |
| 2015 | 175 | 396 |
| 2016 | 254 | 447 |
| 2017 | 357 | 490 |
| 2018 | 367 | 488 |
| 2019 | 519 | 482 |
| 2020 | 476 | 413 |
| 2021 | 431 | 461 |
| 2022 | 396 | 331 |
| 2023 | 390 | 306 |
| 2024 | 306 | 256 |
| 2025 | 260 | 241 |
| 2026 | 195 | 165 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrating ethernet technology within drilling systems6 Oct 2026US 12,753,688 B2Schlumberger Technology Corporation
- Horizontal directional drilling system and method6 Oct 2026US 12,753,690 B2Vermeer Manufacturing Company
- Subsurface detection system and method6 Oct 2026US 12,753,692 B2Schlumberger Technology Corporation
- Communication protocol in directional drilling system, apparatus and method utilizing multi-bit data symbol transmission6 Oct 2026US 12,754,302 B2Merlin Technology, Inc.
- Geologic velocity modeling framework6 Oct 2026US 12,754,338 B2Schlumberger Technology Corporation
- Downhole sensing based on time domain reflectometry using resistance and capacitance coupling8 Oct 2026US 2026/0309026 A1Halliburton Energy Services.Inc.
- Untethered logging devices and related methods of logging a wellbore8 Oct 2026US 2026/0309027 A1Saudi Arabian Oil Company
- Method and system for fast pulse telemetry with altered pulse coding8 Oct 2026US 2026/0309028 A1MS Directional, LLC
- Fuel, communications, and power connection systems and related methods8 Oct 2026US 2026/0309574 A1BJ Energy Solutions, LLC
- Optical cable straightening structure for logging while drilling, and drilling device1 Oct 2026US 2026/0298033 A1Wuhan University of Technology
Most cited
By later US patents
- Systems and methods for electromagnetic waterfront surveillance in a vicinity of an oil well347US 11,035,972 B2Saudi Arabian Oil Company · 2021
- Well control systems employing downhole network334US 5,959,547 ABaker Hughes Incorporated · 1999
- Method and system for monitoring smart structures utilizing distributed optical sensors332US 6,913,079 B22005
- Acoustic data link and formation property sensor for downhole MWD system315US 5,924,499 AHalliburton Energy Services.Inc. · 1999
- Selective excitation of heating electrodes for oil wells314US 5,751,895 AEOR International, Inc. · 1998